CN112002853A - Explosion-proof battery - Google Patents
Explosion-proof battery Download PDFInfo
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- CN112002853A CN112002853A CN202010676684.2A CN202010676684A CN112002853A CN 112002853 A CN112002853 A CN 112002853A CN 202010676684 A CN202010676684 A CN 202010676684A CN 112002853 A CN112002853 A CN 112002853A
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- A—HUMAN NECESSITIES
- A62—LIFE-SAVING; FIRE-FIGHTING
- A62C—FIRE-FIGHTING
- A62C3/00—Fire prevention, containment or extinguishing specially adapted for particular objects or places
- A62C3/16—Fire prevention, containment or extinguishing specially adapted for particular objects or places in electrical installations, e.g. cableways
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/60—Heating or cooling; Temperature control
- H01M10/61—Types of temperature control
- H01M10/613—Cooling or keeping cold
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/60—Heating or cooling; Temperature control
- H01M10/63—Control systems
- H01M10/633—Control systems characterised by algorithms, flow charts, software details or the like
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/60—Heating or cooling; Temperature control
- H01M10/63—Control systems
- H01M10/635—Control systems based on ambient temperature
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/60—Heating or cooling; Temperature control
- H01M10/65—Means for temperature control structurally associated with the cells
- H01M10/656—Means for temperature control structurally associated with the cells characterised by the type of heat-exchange fluid
- H01M10/6561—Gases
- H01M10/6563—Gases with forced flow, e.g. by blowers
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/60—Heating or cooling; Temperature control
- H01M10/65—Means for temperature control structurally associated with the cells
- H01M10/656—Means for temperature control structurally associated with the cells characterised by the type of heat-exchange fluid
- H01M10/6567—Liquids
- H01M10/6568—Liquids characterised by flow circuits, e.g. loops, located externally to the cells or cell casings
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
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- Business, Economics & Management (AREA)
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Abstract
The application provides an explosion-proof battery, includes: a box body; the battery module is arranged in the box body and comprises a first area and a second area, the first area comprises all electrodes in the battery module, and the second area comprises all pressure relief valves in the battery module; the first pouring layer covers a first area of the battery module, and is provided with a first opening corresponding to the pressure release valve so that the pressure release valve can exhaust air through the first opening; the second pouring layer at least covers a second area of the battery module, and the impact strength of the second pouring layer is smaller than that of the pressure release valve when the pressure release valve is opened so as to ensure that the second pouring layer is broken when the pressure release valve is opened; and the temperature adjusting device is used for reducing the temperature of the battery module to a second preset temperature when the current temperature of the battery module exceeds a first preset temperature, and the first preset temperature is greater than the second preset temperature. The application can greatly improve the safe reliability of the battery module, ensure the safe use of the battery module and effectively reduce the risk of burning and explosion of the battery module.
Description
Technical Field
The application relates to the technical field of battery safety application, in particular to an explosion-proof battery.
Background
Lithium batteries have been widely used because of their superior storage and charging properties. And with the rapid development and application of batteries, the safety and stability of batteries are receiving wide attention, and one of the main factors affecting the safety and stability of batteries is temperature. When the temperature of the battery is higher, the heating effect is larger, the risk of thermal runaway of the battery is larger, the possibility of explosion of the battery is higher, once the battery explodes, the life safety of people is seriously threatened, and meanwhile, property loss is brought.
Therefore, how to prevent the battery explosion caused by the over-high temperature of the battery becomes a problem to be solved urgently.
Content of application
The present application is directed to solving, at least to some extent, one of the technical problems in the related art.
Therefore, the purpose of this application is to provide an explosion-proof battery, can improve the fail safe nature of battery module by a wide margin, ensures the safe handling of battery module, effectively reduces the risk that battery module takes place burning and explosion.
In order to achieve the above object, an embodiment of the present application provides an explosion-proof battery, including: a box body; the battery module is arranged in the box body and comprises a first area and a second area, the first area comprises all electrodes in the battery module, and the second area comprises all pressure relief valves in the battery module; a first potting layer covering the first area of the battery module, the first potting layer having a first opening corresponding to the pressure relief valve such that the pressure relief valve vents gas through the first opening; a second pouring layer at least covering the second area of the battery module, wherein the impact strength of the second pouring layer is smaller than that of the pressure release valve when the pressure release valve is opened so as to ensure that the pressure release valve breaks the second pouring layer when the pressure release valve is opened; and the temperature adjusting device is used for reducing the temperature of the battery module to a second preset temperature when the current temperature of the battery module exceeds a first preset temperature, wherein the first preset temperature is greater than the second preset temperature.
The explosion-proof battery of this application embodiment adopts the mode of pouring to protect the battery module to adjust the inside temperature of box at battery module place through temperature regulation apparatus in the box, thereby can avoid the inside high temperature of box at place in the battery module, prevent that the battery is overheated, and then can improve the fail safe nature of battery module by a wide margin, ensure the safe handling of battery module, effectively reduce the risk that the battery module takes place to burn and explode.
In one embodiment of the present application, the temperature adjustment device includes: the temperature sensor is used for detecting the current temperature of the battery module; the cooling loop is arranged corresponding to the battery module; and the controller is respectively connected with the at least one temperature sensor and the cooling loop so as to control the conduction of the cooling loop when the current temperature exceeds the first preset temperature.
In an embodiment of the application, the cooling circuit is provided with a refrigerant regulating valve body connected with the controller, and the controller controls the opening degree of the refrigerant regulating valve body according to a first temperature change curve of the battery module.
In one embodiment of the present application, the temperature adjustment device further includes: and the cooling water pump is connected with the controller, and the controller controls the rotating speed of the cooling water pump according to the second temperature change curve of the battery module.
In one embodiment of the present application, the controller is further configured to control the rotation speed of the cooling water pump according to a preset fuzzy control rule and the temperature difference change rate obtained from the temperature change curve.
In one embodiment of the present application, the controller includes: the establishing unit is used for establishing a temperature difference membership function and a temperature difference change rate membership function; the conversion unit is used for converting the temperature difference and the temperature difference change rate into fuzzy values according to the temperature difference membership function and the temperature difference change rate membership function respectively; the determining unit is used for respectively determining fuzzy subsets of the fuzzy values of the temperature difference and the temperature difference change rate in the corresponding discourse domain space; the first establishing unit is used for establishing the fuzzy control rule so as to control the rotating speed of the cooling water pump according to the fuzzy control rule and the fuzzy subset.
In one embodiment of the present application, the controller further comprises: the acquisition unit is used for acquiring a rotating speed fuzzy value of the cooling water pump according to the fuzzy control rule and the fuzzy subset; the calculating unit is used for carrying out weighted average according to the rotating speed fuzzy value and the quantization factor to obtain the target rotating speed of the cooling water pump; and the control unit is used for controlling the rotating speed of the cooling water pump according to the target rotating speed.
In one embodiment of the present application, the controller further comprises: and the second establishing unit is used for establishing a rotating speed membership function so as to obtain a rotating speed fuzzy value of the cooling water pump according to the rotating speed membership function, the fuzzy control rule and the fuzzy subset.
In one embodiment of the application, the fuzzy control rule is established by expert experience.
In one embodiment of the present application, further comprising: a radiator disposed in correspondence with the cooling circuit to reduce a temperature of coolant in the cooling circuit.
Additional aspects and advantages of the present application will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the present application.
Drawings
The foregoing and/or additional aspects and advantages of the present application will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:
fig. 1 is a schematic structural view of an explosion-proof battery according to an embodiment of the present application;
fig. 2 is a schematic structural view of an explosion-proof battery according to another embodiment of the present application;
fig. 3 is a schematic structural view of an explosion-proof battery according to another embodiment of the present application.
Description of reference numerals:
the battery module includes a case 100, an explosion-proof cover 110, at least one pressure relief device 120, a battery module 200, an electrode 210, a pressure relief valve 220, a supporter 230, a first potting layer 300, a second potting layer 400, at least one temperature sensor 500, a cooling circuit 600, a controller 700, a water pump 800, and a heat sink 900.
Detailed Description
Reference will now be made in detail to embodiments of the present application, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are exemplary and intended to be used for explaining the present application and should not be construed as limiting the present application.
An explosion-proof battery proposed according to an embodiment of the present application is described below with reference to the accompanying drawings. To the risk problem of burning and explosion because of the overheated emergence of battery among the correlation technique who mentions among the above-mentioned background art, the application provides an explosion-proof battery, the mode that adopts to water to seal protects the battery module, and adjust the inside temperature of box at battery module place through the temperature regulation apparatus in the box, thereby can avoid the inside high temperature of box at battery module place, prevent that the battery is overheated, and then can improve the fail safe nature of battery module by a wide margin, ensure the safe handling of battery module, effectively reduce the risk that the battery module takes place to burn and explode. Therefore, the problem of risk of combustion and explosion caused by overheating of the battery in the related art is solved.
It should be noted that, in the following embodiments, the explosion-proof battery is exemplified as the lithium battery, or may be any other rechargeable battery, which is not limited to this.
Fig. 1 is a block schematic diagram of an explosion-proof battery according to an embodiment of the present application.
As shown in fig. 1, the explosion-proof battery includes: the battery module comprises a box body 100, a battery module 200, a first encapsulation layer 300, a second encapsulation layer 400 and a temperature regulation device (not specifically marked in the figure).
Wherein the battery module 200 is disposed in the case 100, the battery module 200 includes a first region and a second region, the first region includes all the electrodes 210 in the battery module 200, and the second region includes all the pressure relief valves 220 in the battery module 200; the first encapsulation layer 300 covers a first area of the battery module 200, and the first encapsulation layer has a first opening corresponding to the pressure release valve 220, so that the pressure release valve 220 exhausts gas through the first opening; the second pouring layer 400 at least covers a second area of the battery module 200, wherein the impact strength of the second pouring layer 400 is smaller than that of the relief valve when the relief valve is opened, so that the second pouring layer 400 is guaranteed to be broken when the relief valve 220 is opened; and the temperature adjusting device is used for reducing the temperature of the battery module to a second preset temperature when the current temperature of the battery module exceeds a first preset temperature, wherein the first preset temperature is greater than the second preset temperature.
In the present embodiment, the lithium battery has the characteristics of small volume, light weight, large specific energy, and the like, and therefore, the battery module 200 in the present embodiment may be formed by combining single lithium batteries.
In some embodiments, the single lithium batteries may be connected in series or parallel connection and then combined with corresponding protection circuits to form the battery module 200.
It should be noted that the second encapsulation layer 400 may be disposed in many ways, and is not limited in particular.
As a possible implementation manner, as shown in fig. 1, the second potting layer 400 may cover the second area and the first potting layer 300, form a double-layer protection for the electrode 210, and protect the first potting layer 300 while preventing the pressure relief valve 220 of the battery module 200 from being opened and damaging the battery module 200.
In some embodiments, the materials used in the first and second potting layers 300 and 400 in this embodiment may be the same or different. For example, the first and second potting layers 300 and 400 in this embodiment may be silicon gel or epoxy resin. Wherein, the silica gel is a high-activity adsorption material, belongs to amorphous substance, and has stable chemical property and no combustion as the main component of silicon dioxide; epoxy resin is a general name of a polymer containing more than two epoxy groups in a molecule, is a polycondensation product of epoxy chloropropane and bisphenol A or polyol, and can be subjected to ring opening by using various compounds containing active hydrogen due to the chemical activity of the epoxy groups, and a network structure is formed by curing and crosslinking, so that the epoxy resin is a thermosetting resin. Therefore, the silica gel or the epoxy resin has the characteristics of high temperature resistance, good flame retardant property, explosion resistance and the like.
The explosion-proof battery architecture design mode in the embodiment of the application, because the impact strength of second encapsulation layer 400 is less than the impact strength when relief valve 202 is opened, consequently, when the relief valve 220 of battery module 200 is opened, even the pressure that produces is destroyed second encapsulation layer 400, first encapsulation layer 300 still can effectively protect the positive and negative terminals of single lithium cell, realize the effective isolation of potential ignition source and explosive gas, the probability of terminal accidents such as burning and explosion has been reduced by a wide margin, the safety protection performance of explosion-proof battery has been promoted.
In the present embodiment, as shown in fig. 2, the temperature adjustment device includes: at least one temperature sensor 500, a cooling circuit 600, and a controller 700. Wherein, at least one temperature sensor 500 is used for detecting the current temperature of the battery module 200; the cooling circuit 600 is disposed corresponding to the battery module 200; the controller 700 is connected to the at least one temperature sensor 500 and the cooling circuit 600, respectively, to control the conduction of the cooling circuit 600 when the current temperature exceeds a first preset temperature.
The first preset temperature may be set according to a temperature range of normal and stable operation of the battery, for example, 40 ℃, and is not specifically limited herein.
It should be noted that, in the embodiment of the present application, the temperature of the battery may be reduced in various ways, and is not specifically limited herein.
As a possible implementation manner, the cooling circuit 600 is provided with a refrigerant regulating valve (not specifically labeled in the figure) connected to the controller 700, and the controller 700 controls the opening degree of the refrigerant regulating valve according to the first temperature variation curve of the battery module 200.
The refrigerant control valve is used for regulating and controlling the refrigerant flow according to the temperature so as to control the temperature, and the refrigerant regulating valve body can be an electromagnetic valve or an electric two-way regulating valve and the like, which is not particularly limited herein. In this embodiment, the opening degree of the refrigerant regulating valve body is in direct proportion to the change rate of the first temperature change curve, for example, if the temperature of the battery module is obtained according to the first temperature change curve to be in an increasing trend, the opening degree of the refrigerant regulating valve body is increased, so that the requirement of cooling is met, and the temperature of the battery module is prevented from being too high; if the temperature of the battery module is obtained to be in a descending trend according to the first temperature change curve, the opening degree of the valve body can be reduced, and therefore energy consumption is reduced while the temperature of the battery module is prevented from being too high.
As another possible implementation manner, as shown in fig. 3, the temperature adjustment device further includes: the cooling water pump 800. The cooling water pump 800 is connected to the controller 700, and the controller 700 controls the rotation speed of the cooling water pump according to the second temperature variation curve of the battery module 200.
In some embodiments, the controller 700 is further configured to control the rotational speed of the cooling water pump according to a preset fuzzy control rule and the temperature difference change rate obtained from the temperature change curve.
It is understood that the controller may achieve the water circulation water flow state of the coolant by controlling the rotation speed of the cooling water pump, wherein the higher the rotation speed of the cooling water pump, the faster the cooling response. It should be noted that, as the higher the rotation speed of the cooling water pump is, the higher the power consumption is, in order to take energy saving and temperature reduction into consideration, in the embodiment of the present application, the load of power consumption is reduced by improving the cooling efficiency, and while controlling the temperature of the battery, the rotation speed of the cooling water pump is adjusted in real time by applying a fuzzy control algorithm according to the temperature difference and the temperature difference change rate between the measured temperature and the set temperature, so as to achieve the purpose of energy saving.
In some embodiments, the controller comprises: the device comprises an establishing unit, a converting unit, a determining unit and a first establishing unit. The device comprises an establishing unit, a calculating unit and a control unit, wherein the establishing unit is used for establishing a temperature difference membership function and a temperature difference change rate membership function; the conversion unit is used for converting the temperature difference and the temperature difference change rate into fuzzy values according to the temperature difference membership function and the temperature difference change rate membership function respectively; the determining unit is used for respectively determining fuzzy subsets of the temperature difference and the fuzzy value of the temperature difference change rate in the corresponding discourse domain space; and the first establishing unit is used for establishing a fuzzy control rule so as to control the rotating speed of the cooling water pump according to the fuzzy control rule and the fuzzy subset.
It should be noted that the fuzzy control rule may be established by an expert experience method, the fuzzy control rule is based on the control experience accumulated by the operator for a long time and the knowledge of the expert, and whether the establishment of the fuzzy control rule is accurate or not will determine the quality of the control performance of the fuzzy controller. For example, the fuzzy control rule can be summarized in table 1, such as when the maximum temperature is greater than 40 ℃ (i.e. the temperature difference is positive), if the temperature difference change rate is positive, the temperature difference tends to increase, and in order to reduce the temperature as soon as possible and restrain the temperature difference from increasing, the output control rotation speed is increased.
TABLE 1
On the basis of the above-mentioned off-line calculation, it can form the inquiry table of fuzzy controller, and can store it in the single-chip machine ROM, and can program an inquiry table subprogram. In the actual control process, the acquired actual measurement error e (K) (0, 1..) and the calculated change ec (K +1) -ec (K) of the error are multiplied by the quantization factor K in each period (1 s period), respectively1And K2The table look-up subprogram can be called to look up the output U of the corresponding fuzzy system.
In some embodiments, the controller further comprises: the device comprises an acquisition unit, a calculation unit and a control unit. The acquisition unit is used for acquiring a rotating speed fuzzy value of the cooling water pump according to the fuzzy control rule and the fuzzy subset; the calculating unit is used for carrying out weighted average according to the rotating speed fuzzy value and the quantization factor to obtain the target rotating speed of the cooling water pump; and the control unit is used for controlling the rotating speed of the cooling water pump according to the target rotating speed.
Specifically, the deblurring can adopt a weighted average method, and the U value is deblurred and then multiplied by a quantization factor K3And obtaining an accurate control output u, wherein the output corresponds to the control rotating speed of the cooling water pump. Wherein the quantization factor K1、K2Is calculated as K ═ range of discourse/range of fundamental discourse, e.g. K1＝(6-(-6))/(95-(-35))＝6/65；K2(6- (-6))/(10- (-10)) ═ 0.6. In addition, K3Is equal to the range of the basic domain/range of the domain, e.g. K3＝1000。
In some embodiments, the controller further comprises: and the second establishing unit is used for establishing a rotating speed membership function so as to obtain a rotating speed fuzzy value of the cooling water pump according to the rotating speed membership function, the fuzzy control rule and the fuzzy subset.
Specifically, the input quantity of the fuzzy controller is obtained according to the sampling value at this time, and input quantization processing is performed. And secondly, fuzzifying the quantized variable to obtain a fuzzy quantity.
In some embodiments, as shown in fig. 3, the explosion-proof battery further includes: a heat sink 900. The radiator 900 is disposed corresponding to the cooling circuit 600 to reduce the temperature of the coolant in the cooling circuit.
In the present embodiment, the coolant may be light water, heavy water, carbon dioxide, helium gas, or the like.
In some embodiments, in order to further fix the battery module 200 in the potting region (the region where the first potting layer and the second potting layer are located) and to facilitate heat dissipation of the battery module 200, as shown in fig. 3, the explosion-proof battery in the embodiment of the present application may further include:
and a supporter 230 disposed in the encapsulation region, the supporter 230 for supporting and fixing the battery module 200.
In the present embodiment, the support 230 has a shape corresponding to the battery module 200. When the shape of the battery module 4 is a quadrangle, the support member 230 may include four side frames, and the support member 230 may be a quadrangle.
In some embodiments, the case 100 may be an explosion-proof case or a non-explosion-proof metal-shielding case, as shown in fig. 3, and the case 100 includes: the battery module includes a case body and an explosion-proof cover 110 disposed on the case body, wherein the explosion-proof cover 110 is connected to the case body by bolts, and a free space exists between a potting layer covering the battery module 200 and the explosion-proof cover 110.
In order to further improve the safety and reliability of the explosion-proof battery, and avoid the gas gathering in the box 100 to cause too high pressure to further damage the box 100 and affect the battery module 200, the explosion-proof battery further comprises at least one pressure relief device 120, wherein the at least one pressure relief device 120 is arranged on the explosion-proof cover 110 or the box body, so as to ensure that the pressure is timely relieved when the pressure in the box body rises, and reduce the effect on the battery module 200.
In some embodiments, the pressure relief device may be, for example, without limitation, a flame arrestor, a one-way valve, or a combination of a flame arrestor and a one-way valve.
According to the explosion-proof battery that this application embodiment provided, the mode that adopts to water to seal protects the battery module to adjust the inside temperature of box at battery module place through the temperature regulation apparatus in the box, thereby can avoid the inside high temperature of box at place in the battery module, prevent that the battery is overheated, and then can improve the fail safe nature of battery module by a wide margin, ensure the safe handling of battery module, effectively reduce the risk that the battery module takes place to burn and explode.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present application, "plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.
In the description herein, reference to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the application. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction.
Although embodiments of the present application have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present application, and that variations, modifications, substitutions and alterations may be made to the above embodiments by those of ordinary skill in the art within the scope of the present application.
Claims (10)
1. An explosion-proof battery, comprising:
a box body;
the battery module is arranged in the box body and comprises a first area and a second area, the first area comprises all electrodes in the battery module, and the second area comprises all pressure relief valves in the battery module;
the first pouring layer covers the first area of the battery module, and is provided with a first opening corresponding to the pressure release valve so that the pressure release valve can exhaust gas through the first opening;
a second pouring layer at least covering the second area of the battery module, wherein the impact strength of the second pouring layer is smaller than that of the pressure release valve when the pressure release valve is opened so as to ensure that the pressure release valve breaks the second pouring layer when the pressure release valve is opened;
and the temperature adjusting device is used for reducing the temperature of the battery module to a second preset temperature when the current temperature of the battery module exceeds a first preset temperature, wherein the first preset temperature is greater than the second preset temperature.
2. The explosion-proof battery as set forth in claim 1, wherein said temperature adjusting means includes:
the temperature sensor is used for detecting the current temperature of the battery module;
the cooling loop is arranged corresponding to the battery module;
and the controller is respectively connected with the at least one temperature sensor and the cooling loop so as to control the conduction of the cooling loop when the current temperature exceeds the first preset temperature.
3. The explosion-proof battery as claimed in claim 2, wherein the cooling circuit is provided with a refrigerant regulating valve body connected to the controller, and the controller controls the opening degree of the refrigerant regulating valve body according to a first temperature variation curve of the battery module.
4. The explosion-proof battery as set forth in claim 2, wherein said temperature adjusting means further comprises:
and the cooling water pump is connected with the controller, and the controller controls the rotating speed of the cooling water pump according to the second temperature change curve of the battery module.
5. The explosion-proof battery as claimed in claim 4, wherein the controller is further adapted to control the rotation speed of the cooling water pump according to a preset fuzzy control rule and the temperature difference change rate obtained from the temperature change curve.
6. The explosion-proof battery as set forth in claim 5, wherein said controller comprises:
the establishing unit is used for establishing a temperature difference membership function and a temperature difference change rate membership function;
the conversion unit is used for converting the temperature difference and the temperature difference change rate into fuzzy values according to the temperature difference membership function and the temperature difference change rate membership function respectively;
the determining unit is used for respectively determining fuzzy subsets of the fuzzy values of the temperature difference and the temperature difference change rate in the corresponding discourse domain space;
the first establishing unit is used for establishing the fuzzy control rule so as to control the rotating speed of the cooling water pump according to the fuzzy control rule and the fuzzy subset.
7. The explosion-proof battery as defined in claim 6, wherein the controller further comprises:
the acquisition unit is used for acquiring a rotating speed fuzzy value of the cooling water pump according to the fuzzy control rule and the fuzzy subset;
the calculating unit is used for carrying out weighted average according to the rotating speed fuzzy value and the quantization factor to obtain the target rotating speed of the cooling water pump;
and the control unit is used for controlling the rotating speed of the cooling water pump according to the target rotating speed.
8. The explosion-proof battery as set forth in claim 7, wherein the controller further comprises:
and the second establishing unit is used for establishing a rotating speed membership function so as to obtain a rotating speed fuzzy value of the cooling water pump according to the rotating speed membership function, the fuzzy control rule and the fuzzy subset.
9. The explosion-proof battery as claimed in any one of claims 5 to 8, wherein the fuzzy control rule is established by an expert experience method.
10. The explosion-proof battery as defined in claim 2, further comprising:
a radiator disposed in correspondence with the cooling circuit to reduce a temperature of coolant in the cooling circuit.
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112670642A (en) * | 2021-01-28 | 2021-04-16 | 唐山鹏安科技有限公司 | Inert gas protection method for explosion-proof lithium battery power supply during combustion |
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| CN112670642B (en) * | 2021-01-28 | 2022-07-26 | 唐山鹏安科技有限公司 | Inert gas protection method for explosion-proof lithium battery power supply during combustion |
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| CN112002853B (en) | 2023-07-25 |
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