CN111916596B - Battery protection device - Google Patents
Battery protection device Download PDFInfo
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- CN111916596B CN111916596B CN202010529518.XA CN202010529518A CN111916596B CN 111916596 B CN111916596 B CN 111916596B CN 202010529518 A CN202010529518 A CN 202010529518A CN 111916596 B CN111916596 B CN 111916596B
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- battery
- nut
- expansion valve
- liquid outlet
- liquid
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- 239000007788 liquid Substances 0.000 claims abstract description 88
- 230000007246 mechanism Effects 0.000 claims abstract description 39
- RNFJDJUURJAICM-UHFFFAOYSA-N 2,2,4,4,6,6-hexaphenoxy-1,3,5-triaza-2$l^{5},4$l^{5},6$l^{5}-triphosphacyclohexa-1,3,5-triene Chemical compound N=1P(OC=2C=CC=CC=2)(OC=2C=CC=CC=2)=NP(OC=2C=CC=CC=2)(OC=2C=CC=CC=2)=NP=1(OC=1C=CC=CC=1)OC1=CC=CC=C1 RNFJDJUURJAICM-UHFFFAOYSA-N 0.000 claims abstract description 18
- 239000003063 flame retardant Substances 0.000 claims abstract description 18
- 239000000843 powder Substances 0.000 claims abstract description 18
- 230000001960 triggered effect Effects 0.000 claims abstract description 13
- 239000012528 membrane Substances 0.000 claims abstract description 11
- 239000000110 cooling liquid Substances 0.000 claims description 11
- 238000001514 detection method Methods 0.000 claims description 3
- 238000010438 heat treatment Methods 0.000 claims description 3
- 230000000149 penetrating effect Effects 0.000 claims description 3
- 230000005611 electricity Effects 0.000 claims description 2
- 230000017525 heat dissipation Effects 0.000 abstract description 9
- 239000002826 coolant Substances 0.000 abstract description 2
- 238000001816 cooling Methods 0.000 description 9
- 230000000694 effects Effects 0.000 description 8
- 230000035939 shock Effects 0.000 description 5
- 230000002159 abnormal effect Effects 0.000 description 3
- 230000008901 benefit Effects 0.000 description 3
- 238000007599 discharging Methods 0.000 description 3
- 238000010521 absorption reaction Methods 0.000 description 2
- 230000008602 contraction Effects 0.000 description 2
- 230000001276 controlling effect Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 238000007664 blowing Methods 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 230000008094 contradictory effect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000004880 explosion Methods 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 230000000979 retarding effect Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Images
Classifications
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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
-
- 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
-
- 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
-
- 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
- H01M10/655—Solid structures for heat exchange or heat conduction
- H01M10/6551—Surfaces specially adapted for heat dissipation or radiation, e.g. fins or coatings
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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
Abstract
One or more embodiments of the present disclosure provide a battery protection device, which includes a battery case, wherein terminals at two ends of the battery case are electrically connected to a connecting plate to be connected to and conducted with tabs of a battery core, a liquid inlet tube is externally connected to an expansion valve to allow a coolant to be introduced, the liquid outlet tube is attached to an outer sidewall of the battery core to cool and dissipate heat, an expansion liquid is filled in a temperature sensing bag to sense a temperature of the liquid outlet tube and control an opening and closing degree of the expansion valve to automatically adjust heat dissipation in real time, a switch mechanism is further disposed on the expansion valve, a screw and a nut are also disposed to be engaged with each other by threads, a hollow interior of the nut is filled with a flame retardant powder, an elastic membrane is attached to an outer side of the nut in an original state and is clamped and fixed by an elastic rope, when a temperature sensed by the temperature sensing bag reaches a threshold, the switch mechanism is triggered to trigger and conduct a piercing mechanism to pierce the connecting plate and the elastic rope, so as to throw the flame-retardant powder, thereby realizing the functions of extinguishing fire in time and isolating the battery.
Description
Technical Field
One or more embodiments of the present disclosure relate to the field of battery technologies, and in particular, to a battery protection device.
Background
As batteries are used more and more widely, the safety problem of the batteries is increasingly prominent, the batteries generate a large amount of heat during power supply, and therefore the batteries need to be effectively cooled, particularly, the batteries may be overheated due to impact of large current under unexpected conditions such as external short circuit and the like during storage and transportation, even cause combustion and explosion of the batteries, and meanwhile, in the states of overcharge and overdischarge, due to the increase of current, the batteries also cause rapid temperature rise, if the batteries cannot be timely cooled, the service life of the batteries is affected, the instability of the batteries is increased, and potential safety hazards exist, while in the prior art, the batteries are generally cooled by continuously introducing cold air or blowing air into a battery box, on one hand, the batteries do not have the function of automatic adjustment along with the temperature change of the batteries, so that the batteries cannot be matched with different temperatures in real-time use, the battery is in an ideal state when used, particularly when the temperature of the battery rises abnormally and quickly, the heat dissipation is difficult to adjust in time to ensure the safety and the stability of the battery, on the other hand, when the battery burns in an accident or even explodes, the introduced cooling air can help to burn to a certain extent, and the battery is extremely easy to burn violently due to the fact that the battery does not have the functions of actively extinguishing fire and isolating the battery in time, further more serious secondary accidents occur, and the safety is poor.
Disclosure of Invention
In view of this, an object of one or more embodiments of the present disclosure is to provide a battery protection device, so as to achieve the functions of automatically adjusting heat dissipation according to different real-time temperatures of a battery, and timely extinguishing a fire and isolating the battery when a temperature threshold is reached.
In view of the above objects, one or more embodiments of the present specification provide a battery protection apparatus including:
a battery case;
the battery core body is fixed on the bottom end surface in the battery shell;
the pole column is fixed at the two ends of the battery shell, the bottom end of the pole column penetrates into the battery shell, and is electrically connected with the connecting sheet so as to be connected and conducted with the pole ear of the battery core body through the connecting sheet;
the expansion valve is arranged at the upper end of the battery core body, a liquid inlet pipe is externally connected to the inlet end of the expansion valve and used for introducing cooling liquid, and a liquid outlet pipe is connected to the outlet end of the expansion valve and attached to the outer side wall of the battery core body and extends out of the battery shell;
the temperature sensing bag is attached to one end of the liquid outlet pipe extending out of the battery shell;
one end of the capillary tube is communicated with the temperature sensing bulb, and the other end of the capillary tube is communicated with the expansion valve and used for controlling the opening and closing degree of the expansion valve;
the switch mechanism is arranged at one end of the expansion valve close to the capillary tube;
the lead screw structure comprises a screw rod and a nut which are in threaded engagement with each other, one end of the screw rod is fixed at the top end of the middle part in the battery shell, the other end of the screw rod is abutted against the upper end of the battery core body downwards, the nut is designed into a hollow structure so as to be filled with flame retardant powder, and a plurality of through holes are formed in the side wall and the bottom wall of the nut;
the spring is arranged between the nut and the top wall of the battery shell;
the elastic film covers and is attached to the side wall and the bottom wall of the outer side of the nut;
the elastic rope is tensioned and encircled along the circumferential direction of the outer side wall of the nut by one circle, and the upper end of the elastic rope is connected to the top wall of the battery shell and used for clamping the elastic membrane and the nut;
the top thorn mechanism is electrically connected with the switch mechanism, and when the temperature of the liquid outlet pipe reaches a limit threshold value through the sensing of the temperature sensing bulb, the switch mechanism can be triggered to be switched on, the top thorn mechanism can be triggered to be switched off, the connecting sheet and the elastic rope can be punctured, so that the nut moves downwards under the thrust of the spring, and the flame-retardant powder is scattered through the through hole.
Preferably, the expansion valve is including the feed liquor chamber, go out the liquid chamber, the control chamber, the diaphragm, the valve rod, the spheroid, feed liquor chamber and play liquid chamber communicate each other, and external intercommunication in feed liquor pipe and drain pipe respectively, the control chamber is located out the liquid chamber upper end, the control intracavity is located to the diaphragm, the valve rod upper end is fixed in on the diaphragm, the lower extreme is worn to establish out the liquid chamber, and fixedly connected with spheroid, the spheroid diameter is greater than the internal diameter of the junction pipeline in play liquid chamber and feed liquor chamber, the control chamber that is located diaphragm upper portion is linked together through capillary and temperature sensing package, and it has the inflation liquid all to fill, but thermal expansion, in order to push away the valve rod, in order to push away from the spheroid, in order to enlarge the flow in liquid chamber.
Preferably, the bottom end in the liquid outlet cavity is also provided with a pressure spring, and the upper end of the pressure spring is fixed with a support plate for supporting the ball body.
Preferably, the switch mechanism comprises a valve needle and a proximity switch, one end of the valve needle is fixed on the upper end face of the diaphragm, the other end of the valve needle penetrates out of the control cavity, the proximity switch is fixed at one end of the valve needle penetrating out of the control cavity, the detection end of the proximity switch faces the expansion valve, and when the expansion liquid expands by heating to push the diaphragm, the valve needle can be driven to move, the proximity switch can be triggered, and the pricking mechanism can be triggered to be switched on.
Preferably, the top thorn mechanism is including electric putter, the top sword, the design of both ends is the spine form of symmetry about the top sword, the top sword top penetrates roof in the battery case, the top sword bottom is contradicted in electric putter's expansion end, electric putter is contradicted and is equipped with the recess in top sword department, in order to cooperate with the spine end of top sword, electric putter is fixed in the battery case internally, and the end design of electric putter expansion end is the spine form, electric putter and proximity switch electricity are connected, release with accessible proximity switch triggers electric putter's expansion end, with the disconnected elasticity rope of thorn, can drive the top sword simultaneously and shift out the recess, in order to upwards sting disconnected connecting piece.
Preferably, the liquid outlet pipe is coiled on the outer side wall of the battery core body in a serpentine shape.
Preferably, one end of the spring penetrates into the top wall of the battery shell, and the other end of the spring abuts against the upper end of the nut.
Preferably, the springs are provided in not less than two sets.
Preferably, a rubber shock pad is fixed at one end of the screw abutting against the battery core.
From the above, it can be seen that a battery protection device provided in one or more embodiments of the present disclosure is a battery protection device, in which a battery case is provided, a battery core is fixed on a bottom surface inside the battery case, two terminals of the battery case are fixed with terminals, bottom ends of the terminals penetrate into the battery case and are electrically connected to a connecting sheet, so as to be connected and conducted with tabs of the battery core through the connecting sheet, when in use, the terminals at two ends can be connected and conducted with external charging and discharging equipment, an expansion valve is provided at an upper end of the battery core, an inlet end of the expansion valve is externally connected to a liquid inlet pipe for introducing a cooling liquid, an outlet end of the expansion valve is connected to a liquid outlet pipe, the liquid outlet pipe is attached to an outer side wall of the battery core, so as to circularly flow through the outer side wall of the battery core through the cooling liquid, so as to achieve the effect of cooling and heat dissipation, and an end of the liquid outlet pipe extending out of the battery case is attached to a temperature sensing bag, the expansion valve is communicated with the expansion valve through the capillary tube, so that the expansion liquid is filled in the temperature sensing bulb and the capillary tube, the real-time temperature of one end of the liquid outlet tube, which flows out of the battery core body, can be sensed, the opening and closing degree of the expansion valve can be controlled through the expansion of the expansion liquid, the flow rate of the cooling liquid can be controlled in real time, the function of automatically adjusting the cooling and heat dissipation capacity of the liquid outlet tube according to different real-time temperatures of the battery core body can be realized, the ideal temperature state of the battery can be kept, the safety and the stability of the battery can be ensured, in addition, one end of the expansion valve, which is close to the capillary tube, is provided with a switch mechanism, and is simultaneously provided with a screw rod and a nut which are mutually meshed through threads, wherein the nut is designed into a hollow structure, the flame retardant powder is filled in the nut, the side wall and the bottom wall of the nut are provided with a plurality of through holes, and the side wall and the bottom wall outside of the nut are covered with an elastic film in the original state, the elastic membrane and the nut are clamped and fixed through the elastic rope, when an accident occurs in use, the temperature of the liquid outlet pipe is sensed to reach a limit threshold value through the temperature sensing bag, so that the switch mechanism can be triggered to be switched on and switched off, the connecting sheet and the elastic rope are broken, the nut is free from the clamping constraint of the elastic rope and moves downwards in a spiral mode under the thrust of the spring, the flame retardant powder is thrown out through the through hole to uniformly cover the battery core body, the flame retardant powder can play a role in absorbing heat and resisting flame due to the characteristics of the flame retardant powder, and meanwhile, the connecting sheet is broken through the pricking so that the electric connection of the battery core body can be timely disconnected, therefore, the functions of timely extinguishing and isolating the battery in an abnormal state are achieved, serious safety accidents are avoided, and hidden dangers are timely eliminated to guarantee safety.
Drawings
In order to more clearly illustrate one or more embodiments or prior art solutions of the present specification, the drawings that are needed in the description of the embodiments or prior art will be briefly described below, and it is obvious that the drawings in the following description are only one or more embodiments of the present specification, and that other drawings may be obtained by those skilled in the art without inventive effort from these drawings.
FIG. 1 is a schematic structural diagram of an embodiment of the present invention;
FIG. 2 is an enlarged schematic view at A of FIG. 1 according to an embodiment of the present invention;
fig. 3 is a schematic structural diagram of an expansion valve according to an embodiment of the present invention.
In the figure: 1. a battery case; 2. a battery core body; 3. a pole column; 4. connecting sheets; 5. an expansion valve; 51. a liquid inlet cavity; 52. a liquid outlet cavity; 53. a control chamber; 54. a membrane; 55. a valve stem; 56. a sphere; 57. compressing the spring; 58. a support plate; 6. a liquid inlet pipe; 7. a liquid outlet pipe; 8. a temperature sensing bulb; 9. a capillary tube; 10. a switch mechanism; 101. a valve needle; 102. a proximity switch; 11. a lead screw structure; 111. a screw; 112. a nut; 12. a spring; 13. an elastic film; 14. an elastic cord; 15. a thorn ejecting mechanism; 151. an electric push rod; 1511. a groove; 152. ejecting a cutter; 16. a rubber shock pad.
Detailed Description
To make the objects, technical solutions and advantages of the present disclosure more apparent, the present disclosure is further described in detail below with reference to specific embodiments.
It is to be understood that unless otherwise defined, technical or scientific terms used in one or more embodiments of the present disclosure should have the ordinary meaning as understood by one of ordinary skill in the art to which this disclosure belongs. The use of "first," "second," and similar terms in one or more embodiments of the specification is not intended to indicate any order, quantity, or importance, but rather is used to distinguish one element from another. The word "comprising" or "comprises", and the like, means that the element or item preceding the word comprises the element or item listed after the word and its equivalent, but does not exclude other elements or items. The terms "connected" or "coupled" and the like are not restricted to physical or mechanical connections, but may include electrical connections, whether direct or indirect. "upper", "lower", "left", "right", and the like are used merely to indicate relative positional relationships, and when the absolute position of the object being described is changed, the relative positional relationships may also be changed accordingly.
A battery protection device is disclosed, as shown in figures 1 to 3, comprising a battery case 1, a battery core 2 is fixed on the inner bottom end surface of the battery case 1, two terminals 3 are fixed on the battery case 1, the bottom end of the terminal 3 penetrates into the battery case 1 and is electrically connected with a connecting sheet 4 to be connected and conducted with the pole ear of the battery core 2 through the connecting sheet 4, an expansion valve 5 is arranged on the upper end of the battery core 2, a liquid inlet pipe 6 is externally connected to the inlet end of the expansion valve 5 for introducing cooling liquid, a liquid outlet pipe 7 is connected to the outlet end of the expansion valve 5, the liquid outlet pipe 7 is attached to the outer side wall of the battery core 2 and extends out of the battery case 1, a temperature sensing bag 8 is attached to the end of the liquid outlet pipe 7 extending out of the battery case 1, a capillary tube 9 is arranged, one end of the capillary tube 9 is communicated with the temperature sensing bag 8, the other end is communicated with the expansion valve 5 for controlling the opening and closing degree of the expansion valve 5, the expansion valve 5 is provided with a switch mechanism 10 at one end close to the capillary tube 9, and is also provided with a lead screw structure 11, the lead screw structure 11 comprises a screw 111 and a nut 112 which are mutually in threaded engagement, one end of the screw 111 is fixed at the top end of the middle part in the battery shell 1, the other end of the screw is butted against the upper end of the battery core 2 downwards, the nut 112 is designed into a hollow structure to be filled with flame retardant powder, a plurality of through holes are arranged on the side wall and the bottom wall of the nut 112, a spring 12 is arranged between the nut 112 and the top wall of the battery shell 1, the side wall and the bottom wall at the outer side of the nut 112 are covered and adhered with an elastic membrane 13, an elastic rope 14 is tensioned around the circumference of the outer side wall of the nut 112, the upper end of the elastic rope 14 is connected to the top wall of the battery shell 1 to clamp the elastic membrane 13 and the nut 112, the switch mechanism 10 is electrically connected with a spur mechanism 15, when the temperature sensing package 8 senses that the temperature of the liquid outlet pipe 7 reaches a limit threshold value, the switch mechanism 10 can be triggered to conduct the piercing mechanism 15 to pierce the connecting piece 4 and the elastic cord 14, so that the nut 112 is pushed by the spring 12 to move downwards and the flame retardant powder is spread out through the through hole.
The invention arranges the battery shell 1, the battery core 2 is fixed on the bottom end face of the battery shell 1, the pole 3 is fixed on the two ends of the battery shell 1, the bottom end of the pole 3 penetrates into the battery shell 1, and is electrically connected with the connecting sheet 4, so as to connect and conduct with the pole ear of the battery core 2 through the connecting sheet 4, when in use, the pole 3 at the two ends can connect and conduct with the external charging and discharging equipment, the expansion valve 5 is arranged on the upper end of the battery core 2, the inlet end of the expansion valve 5 is externally connected with the liquid inlet pipe 6 for introducing the cooling liquid, the outlet end of the expansion valve 5 is connected with the liquid outlet pipe 7, the liquid outlet pipe 7 is jointed on the outer side wall of the battery core 2, so as to achieve the effect of cooling and heat dissipation by the circulation flow of the cooling liquid through the outer side wall of the battery core 2, meanwhile, the end of the liquid outlet pipe 7 extending out of the battery shell 1 is jointed with the temperature sensing bag 8, and is communicated with the expansion valve 5 through the capillary 9, therefore, the expansion liquid is filled in the thermal bulb 8 and the capillary 9 to sense the real-time temperature of one end of the battery core 2 flowing out of the liquid outlet pipe 7, so that the opening and closing degree of the expansion valve 5 can be controlled by expansion with heat and contraction with cold of the expansion liquid, the circulation of the cooling liquid can be controlled in real time, the function of automatically adjusting the cooling and heat dissipation capacity of the liquid outlet pipe 7 according to different real-time temperatures of the battery core 2 can be realized, the ideal temperature state of the battery can be kept, and the safety and the stability of the battery can be ensured, in addition, one end of the expansion valve 5 close to the capillary 9 is provided with the switch mechanism 10, and simultaneously provided with the screw 111 and the nut 112 which are engaged with each other by screw threads, wherein, the nut 112 is designed to be a hollow structure to be filled with the flame retardant powder, and the side wall and the bottom wall of the nut 112 are provided with a plurality of through holes, and in the original state, the side wall and the bottom wall outside of the nut 112 are covered with the elastic film 13, the elastic membrane 13 and the nut 112 are clamped and fixed through the elastic rope 14, when an accident occurs in use, the temperature sensing bag 8 senses that the temperature of the liquid outlet pipe 7 reaches a limit threshold value, the switch mechanism 10 can be triggered, the top thorn mechanism 15 can be triggered and switched on, the connecting piece 4 and the elastic rope 14 are punctured and broken, the nut 112 is free from clamping constraint of the elastic rope 14 and moves downwards in a spiral mode under the thrust of the spring 12, the flame retardant powder is thrown out through the through hole to evenly cover the battery core body 2, the flame retardant powder can play a role in absorbing heat and retarding flame due to the characteristics of the flame retardant powder, and meanwhile, the connecting piece 4 is punctured and broken so as to timely disconnect the electric connection of the battery core body 2, so that the functions of timely extinguishing fire and isolating hidden dangers of the battery in an abnormal state are achieved, serious safety accidents are avoided, and safety is timely eliminated to guarantee safety.
In the embodiment of the present invention, the expansion valve 5 comprises a liquid inlet cavity 51, a liquid outlet cavity 52, a control cavity 53, a diaphragm 54, a valve rod 55, and a ball 56, wherein the liquid inlet cavity 51 and the liquid outlet cavity 52 are communicated with each other and respectively externally connected to the liquid inlet pipe 6 and the liquid outlet pipe 7, the control cavity 53 is arranged at the upper end of the liquid outlet cavity 52, the diaphragm 54 is arranged in the control cavity 53, the upper end of the valve rod 55 is fixed on the diaphragm 54, the lower end of the valve rod 55 penetrates through the liquid outlet cavity 52 and is fixedly connected with the ball 56, the diameter of the ball 56 is larger than the inner diameter of the pipeline at the connection part of the liquid outlet cavity 52 and the liquid inlet cavity 51, the control cavity 53 at the upper part of the diaphragm 54 is communicated with the thermal bulb 8 through the capillary tube 9 and is filled with the expansion liquid, so that the temperature of the liquid outlet pipe 7 can be sensed through the thermal bulb 8, the expansion liquid can be heated and expanded, the pressure in the control cavity 53 at the upper part of the diaphragm 54 can be increased, the valve rod 55 can be pushed by the diaphragm 54 to push away from the ball 56, thereby enlarge the flow of play sap cavity 52, in a similar way, through the expansion fluid shrinkage to accessible diaphragm 54 drives valve rod 55, with the junction pipeline that drives spheroid 56 and be close to play sap cavity 52 and feed liquor chamber 51, thereby reduces the flow of play sap cavity 52, realizes from this that can be according to the different temperatures of battery core 2, with the circulation of real time control coolant liquid, with the function of automatically regulated drain pipe 7 cooling heat-sinking capability.
In the embodiment of the present invention, a pressure spring 57 is further disposed at the bottom end in the liquid outlet cavity 52, and a support plate 58 is fixed at the upper end of the pressure spring 57 and is used for stably supporting the ball 56, so as to achieve the effect of stable adjustment.
In the embodiment of the present invention, the switch mechanism 10 includes a valve needle 101 and a proximity switch 102, one end of the valve needle 101 is fixed on the upper end surface of the membrane 54, the other end of the valve needle 101 penetrates the control chamber 53 upwards, the proximity switch 102 is fixed on the end of the valve needle 101 penetrating the control chamber 53, and a detection end of the proximity switch 102 faces the expansion valve 5, so that when the expansion liquid expands by heating to push the membrane 54, the valve needle 101 is driven to move close to the expansion valve 5, and the proximity switch 102 is triggered to conduct the piercing mechanism 15.
In the embodiment of the present invention, the top piercing mechanism 15 includes an electric push rod 151 and a top knife 152, the top knife 152 has two symmetrical piercing ends at its upper and lower ends, the top knife 152 penetrates through the inner top wall of the battery case 1, the bottom end of the top knife 152 abuts against the movable end of the electric push rod 151, and a groove 1511 is disposed at the position where the electric push rod 151 abuts against the top knife 152 so as to be capable of cooperating with the piercing end of the top knife 152, the electric push rod 151 is fixed in the battery case 1 and electrically connected to the proximity switch 102, and the end of the movable end of the electric push rod 151 is likewise piercing, so that when the proximity switch 102 triggers the movable end of the electric push rod 151 to push out, the elastic cord 14 can be pierced through the piercing end piercing of the electric push rod 151, and simultaneously the top knife 152 can move out of the groove 1511 along with the electric push rod 151 so as to upwardly pierce the connecting piece 4.
In the embodiment of the invention, the liquid outlet pipe 7 is coiled on the outer side wall of the battery core body 2 in a serpentine shape, so as to increase the cooling and heat dissipation area.
In the embodiment of the present invention, one end of the spring 12 penetrates into the top wall of the battery case 1, and the other end abuts against the upper end of the nut 112, so as to effectively utilize the space in the battery case 1, so as to increase the stroke of the spring 12, and thereby to facilitate the effect of the nut 112 being spirally thrown by the spring 12.
In the embodiment of the present invention, there are not less than two sets of springs 12 to further enhance the effect of the springs 12 pushing the nut 112 to throw the spiral.
In the embodiment of the invention, a rubber shock pad 16 is fixed at one end of the screw 111 abutting against the battery core body 2 to play roles of abutting against fixation and shock absorption.
In the battery protection device disclosed by the invention, when in use, the connecting sheet 4 is electrically connected with the pole posts 3 at the two ends of the battery shell 1, so as to be connected and communicated with the pole lugs of the battery core 2 through the connecting sheet 4, so as to communicate the battery core 2 with external charging and discharging equipment, the expansion valve 5 at the upper end of the battery core 2 is externally connected with the liquid inlet pipe 6 for introducing cooling liquid, the outlet end of the expansion valve 5 is connected with the liquid outlet pipe 7 and is attached to the outer side wall of the battery core 2, so that the cooling liquid circularly flows through the outer side wall of the battery core 2 to achieve the effects of cooling and heat dissipation, meanwhile, the end of the liquid outlet pipe 7 extending out of the battery shell 1 is attached with the temperature sensing bag 8 and is communicated with the expansion valve 5 through the capillary tube 9, so as to be filled with the expansion liquid through the temperature sensing bag 8 and the capillary tube 9 to sense the real-time temperature of the liquid outlet pipe 7 and to sense the expansion and contraction of the expansion liquid, in addition, the expansion valve 5 is also provided with a switch mechanism 10, and is simultaneously provided with a screw rod 111 and a nut 112 which are engaged with each other in a threaded manner, wherein the nut 112 is designed into a hollow structure to be filled with flame retardant powder, and a plurality of through holes are arranged on the side wall and the bottom wall of the nut 112, under the original state, the side wall and the bottom wall at the outer side of the nut 112 are covered and adhered with an elastic membrane 13 and are clamped and fixed through an elastic rope 14, when the temperature sensing bag 8 senses that the temperature of the liquid outlet pipe 7 reaches a limit threshold value in use, the switch mechanism 10 is triggered to trigger the conducting and conducting of the top thorn mechanism 15 to puncture and break the connecting piece 4 and the elastic rope 14, so that the nut 112 moves downwards in a spiral manner under the thrust of the spring 12 to scatter the flame retardant powder on the battery core body 2 through the through holes to play roles of heat absorption and flame retardance, meanwhile, the connecting sheet 4 is broken by pricking, and the electric connection of the battery core body 2 is broken at the same time, so that the functions of timely extinguishing fire and isolating the battery under the abnormal state are realized, wherein the expansion valve 5 comprises a liquid inlet cavity 51, a liquid outlet cavity 52, a control cavity 53, a diaphragm 54, a valve rod 55 and a ball body 56, the temperature of the liquid outlet pipe 7 is sensed by the temperature sensing bag 8, so that expansion liquid can expand with heat and contract with cold, the pressure of the control cavity 53 at the upper part of the diaphragm 54 can be controlled, the valve rod 55 can be pushed by the diaphragm 54 to push the ball body 56 so as to adjust the flow of the liquid outlet cavity 52, a pressure spring 57 is further arranged at the bottom end in the liquid outlet cavity 52, a support plate 58 is fixed at the upper end of the pressure spring 57 and used for stably supporting the ball body 56, the switch mechanism 10 comprises a valve needle 101 and a proximity switch 102, when the expansion liquid expands with heat so as to push the diaphragm 54, the valve needle 101 can be driven to move, so that the proximity switch 102 can be triggered, the pricking mechanism 15 comprises an electric push rod 151, Top sword 152, when releasing through triggering electric putter 151, strike with the terminal spine of accessible electric putter 151, with the disconnected elasticity rope 14 of thorn, drive top sword 152 simultaneously and shift out recess 1511, with upwards strike the disconnected connection piece 4 of thorn, drain pipe 7 is snakelike coiling on 2 lateral walls of battery core, in order to do benefit to increase cooling radiating area, spring 12 one end penetrates in 1 roof of battery shell, the other end is contradicted in nut 112 upper end, and spring 12 is equipped with and is no less than two sets of, in order to do benefit to the effect that promotion spring 12 promoted nut 112 spiral and shed, screw rod 111 is contradicted and is fixed with rubber shock pad 16 in the one end of battery core 2, in order to play the fixed and absorbing effect of contradicting.
Those of ordinary skill in the art will understand that: the discussion of any embodiment above is meant to be exemplary only, and is not intended to intimate that the scope of the disclosure, including the claims, is limited to these examples; features from the above embodiments, or from different embodiments, may also be combined, steps may be implemented in any order, and there are many other variations of the different aspects of one or more embodiments of the present description, as described above, which are not provided in detail for the sake of brevity.
It is intended that the one or more embodiments of the present specification embrace all such alternatives, modifications and variations as fall within the broad scope of the appended claims. Therefore, any omissions, modifications, substitutions, improvements, and the like that may be made without departing from the spirit and principles of one or more embodiments of the present disclosure are intended to be included within the scope of the present disclosure.
Claims (6)
1. A battery protection device, comprising:
a battery case;
the battery core body is fixed on the bottom end face in the battery shell;
the pole columns are fixed at the two ends of the battery shell, the bottom ends of the pole columns penetrate into the battery shell and are electrically connected with the connecting sheets so as to be connected and conducted with the lugs of the battery core body through the connecting sheets;
the expansion valve is arranged at the upper end of the battery core body, a liquid inlet pipe is externally connected to the inlet end of the expansion valve and used for introducing cooling liquid, and a liquid outlet pipe is connected to the outlet end of the expansion valve and is attached to the outer side wall of the battery core body and extends out of the battery shell;
the temperature sensing bulb is attached to one end, extending out of the battery shell, of the liquid outlet pipe;
one end of the capillary tube is communicated with the thermal bulb, and the other end of the capillary tube is communicated with the expansion valve and used for controlling the opening and closing degree of the expansion valve;
the switch mechanism is arranged at one end of the expansion valve close to the capillary tube;
the lead screw structure comprises a screw rod and a nut which are in threaded engagement with each other, one end of the screw rod is fixed at the top end of the middle part in the battery shell, the other end of the screw rod is abutted against the upper end of the battery core body downwards, the nut is designed into a hollow structure so as to be filled with flame retardant powder, and a plurality of through holes are formed in the side wall and the bottom wall of the nut;
the spring is arranged between the nut and the top wall of the battery shell;
the elastic film covers and is attached to the side wall and the bottom wall of the outer side of the nut;
the elastic rope is tensioned and wound along the circumferential direction of the outer side wall of the nut, and the upper end of the elastic rope is connected to the top wall of the battery shell and used for clamping the elastic membrane and the nut;
the pin ejecting mechanism is electrically connected with the switch mechanism, and when the temperature of the liquid outlet pipe is sensed by the temperature sensing bulb and reaches a limit threshold value, the switch mechanism can be triggered to conduct the pin ejecting mechanism so as to puncture the connecting sheet and the elastic rope, so that the nut moves downwards under the thrust of the spring and the flame retardant powder is scattered through the through hole;
the expansion valve comprises a liquid inlet cavity, a liquid outlet cavity, a control cavity, a diaphragm, a valve rod and a ball body, wherein the liquid inlet cavity and the liquid outlet cavity are communicated with each other and are respectively and externally connected with the liquid inlet pipe and the liquid outlet pipe;
the switch mechanism comprises a valve needle and a proximity switch, one end of the valve needle is fixed on the upper end face of the diaphragm, the other end of the valve needle penetrates out of the control cavity upwards, the proximity switch is fixed at one end of the valve needle penetrating out of the control cavity, the detection end of the proximity switch faces the expansion valve, and when the expansion liquid expands by heating to push the diaphragm, the valve needle can be driven to move so as to trigger the proximity switch and trigger the piercing mechanism to be conducted;
the utility model discloses a battery shell, including battery shell, top thorn mechanism, top sword, both ends design is the spine form of symmetry about the top sword, the top sword top penetrates roof in the battery shell, the top sword bottom contradict in electric putter's expansion end, electric putter contradict in top sword department is equipped with the recess, with the spine end of top sword is mutually supported, electric putter is fixed in the battery shell is internal, just the end design of electric putter expansion end is the spine form, electric putter with the proximity switch electricity is connected, with the accessible proximity switch triggers electric putter's expansion end is released, and is disconnected with the thorn elasticity rope can drive simultaneously the top sword shifts out the recess to it is disconnected to make progress the thorn the connection piece.
2. The battery protection device according to claim 1, wherein a pressure spring is further disposed at a bottom end of the liquid outlet cavity, and a support plate is fixed to an upper end of the pressure spring and used for supporting the ball.
3. The battery protection device of claim 1, wherein the drain tube is coiled on an outer side wall of the battery core in a serpentine shape.
4. The battery protection device of claim 1, wherein one end of the spring penetrates into the top wall of the battery housing, and the other end of the spring abuts against the upper end of the nut.
5. A battery protection device according to claim 1, wherein there are not less than two sets of springs.
6. The battery protection device of claim 1, wherein a rubber cushion is fixed to an end of the screw abutting against the battery core.
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| CN112687493B (en) * | 2020-12-10 | 2021-09-14 | 武汉诺尔曼科技有限公司 | Over-temperature protection device and protection method of electronic speed regulator |
| CN112952236B (en) * | 2021-02-04 | 2022-02-11 | 苏铝科技无锡有限公司 | New forms of energy electric automobile lithium cell aluminium alloy radiator |
| CN113394510B (en) * | 2021-05-31 | 2022-04-19 | 浙江南都电源动力股份有限公司 | Temperature protection structure with over-temperature protection and fire extinguishing functions and protection method |
| CN115241568B (en) * | 2022-08-09 | 2023-03-21 | 广州工程技术职业学院 | Heat dissipation mechanism, heat dissipation box and heat dissipation method |
| CN115295971B (en) * | 2022-10-09 | 2022-12-20 | 楚能新能源股份有限公司 | Protective structure of battery |
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| CN111916596A (en) | 2020-11-10 |
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Denomination of invention: A battery protection device Effective date of registration: 20221226 Granted publication date: 20220726 Pledgee: Xingyang County, Xingyang financing Company limited by guarantee Pledgor: ANHUI ZHENGXI BIAOWANG NEW ENERGY Co.,Ltd. Registration number: Y2022980028946 |
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Date of cancellation: 20230726 Granted publication date: 20220726 Pledgee: Xingyang County, Xingyang financing Company limited by guarantee Pledgor: ANHUI ZHENGXI BIAOWANG NEW ENERGY Co.,Ltd. Registration number: Y2022980028946 |
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Effective date of registration: 20240205 Address after: 1510 Beike Building, No. 59 Gaoxin South 9th Road, Gaoxin Community, Gaoxin District, Yuehai Street, Nanshan District, Shenzhen City, Guangdong Province, 518000 Patentee after: Zhongke Manufacturing (Shenzhen) Group Co.,Ltd. Guo jiahuodiqu after: Zhong Guo Address before: 233600 B District, West City Industrial Park, Woyang County, Bozhou, Anhui Patentee before: ANHUI ZHENGXI BIAOWANG NEW ENERGY Co.,Ltd. Guo jiahuodiqu before: Zhong Guo |