CN114447410B - Automatic constant temperature lithium battery auxiliary device - Google Patents

Automatic constant temperature lithium battery auxiliary device Download PDF

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Publication number
CN114447410B
CN114447410B CN202210122241.8A CN202210122241A CN114447410B CN 114447410 B CN114447410 B CN 114447410B CN 202210122241 A CN202210122241 A CN 202210122241A CN 114447410 B CN114447410 B CN 114447410B
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battery body
electromagnet assembly
temperature
metal sheet
plate
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CN114447410A (en
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渠慎程
张侃
郑素珍
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Xuzhou Chuying Electronic Technology Co ltd
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Xuzhou Chuying Electronic Technology Co ltd
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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
    • H01M10/05—Accumulators with non-aqueous electrolyte
    • H01M10/052—Li-accumulators
    • 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
    • H01M10/05—Accumulators with non-aqueous electrolyte
    • H01M10/058—Construction or manufacture
    • 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
    • H01M10/61—Types of temperature control
    • H01M10/615—Heating or keeping warm
    • 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
    • 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
    • H01M10/637—Control systems characterised by the use of reversible temperature-sensitive devices, e.g. NTC, PTC or bimetal devices; characterised by control of the internal current flowing through the cells, e.g. by switching
    • 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
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/10—Primary casings; Jackets or wrappings
    • H01M50/14—Primary casings; Jackets or wrappings for protecting against damage caused by external factors
    • H01M50/143—Fireproof; Explosion-proof
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/10—Primary casings; Jackets or wrappings
    • H01M50/183—Sealing members
    • H01M50/186—Sealing members characterised by the disposition of the sealing members
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/20—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders
    • H01M50/233—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders characterised by physical properties of casings or racks, e.g. dimensions
    • H01M50/242—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders characterised by physical properties of casings or racks, e.g. dimensions adapted for protecting batteries against vibrations, collision impact or swelling
    • 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
    • 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
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
    • Y02P70/50—Manufacturing or production processes characterised by the final manufactured product

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  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Automation & Control Theory (AREA)
  • Secondary Cells (AREA)
  • Battery Mounting, Suspending (AREA)

Abstract

The invention discloses an automatic constant-temperature lithium battery auxiliary device which comprises a protective box, a charging head, a heat dissipation groove and a battery body, wherein a protective mechanism is arranged on the inner wall of the protective box below the heat dissipation groove, a constant-temperature mechanism is arranged on the protective mechanism, a flame-retardant mechanism is arranged on the inner wall of one side of the protective box, a limiting mechanism is arranged on the surface of one side of the protective box, and a sealing rotating plate is arranged in the heat dissipation groove through a rotating shaft; through the arrangement of the structure, the constant temperature mechanism can take away heat on the surface of the battery body, so that the battery body is in a charging environment with normal temperature, when the temperature exceeds the normal temperature range of a lithium battery, the switch tube is started to trigger the electromagnetic valve to work, and cooling water in the liquid tank and the limiting cooling tube is guided out, so that the high-temperature problem of the battery body can be solved, spontaneous combustion and combustion explosion are avoided, the charging temperature can be increased, and the viscosity of electrolyte is reduced.

Description

Automatic constant temperature lithium battery auxiliary device
Technical Field
The invention relates to the technical field of lithium battery auxiliary equipment, in particular to an automatic constant-temperature lithium battery auxiliary device.
Background
The lithium battery is a battery which uses lithium metal or lithium alloy as a positive/negative electrode material and uses a non-aqueous electrolyte solution, is widely applied to electric vehicles, and is assembled by electrically connecting a plurality of lithium batteries to form a large battery;
when weather is cold, the condition of not charging into electricity can appear often under the lithium cell low temperature, because low temperature can lead to the inside electrolyte of lithium cell to glue thick, and the waiting condenses even, leads to charging slowly, and the lithium cell is when using simultaneously, and the user is difficult to accomplish periodic detection, and this can lead to the lithium cell potential safety hazard to appear, and the accident of lithium cell explosion burning still has the emergence, so the emergence of the reducible accident of automated inspection lithium cell quality.
Disclosure of Invention
The invention aims to provide an automatic constant-temperature lithium battery auxiliary device to solve the problems in the background technology.
In order to achieve the purpose, the invention provides the following technical scheme: the utility model provides an automatic homothermal lithium cell auxiliary device, includes protective housing, the head that charges, radiating groove and battery body, protection mechanism is installed to the protective housing inner wall of radiating groove below, and installs constant temperature mechanism in the protection mechanism, fire-retardant mechanism is installed to one side inner wall of protective housing, one side surface mounting of protective housing has stop gear, sealed commentaries on classics board is installed through the pivot in the inside of radiating groove.
Preferably, protection machanism includes electromagnet assembly, conducting strip and sheetmetal, and battery body's top surface mounting has the sheetmetal, and the conducting strip is installed to the protecting box inner wall in the sheetmetal outside, and electromagnet assembly is installed to the protecting box top inner wall of conducting strip one side, and conducting strip, sheetmetal and the first electric connection that charges.
Preferably, fire-retardant mechanism includes liquid tank, spacing cooling tube and temperature-sensing ware, and the liquid tank is installed to one side inner wall of protecting box, and spacing cooling tube is installed through the pivot to the protecting box inner wall of liquid tank below, and the surface mounting of spacing cooling tube has the temperature-sensing ware.
Preferably, the constant temperature mechanism comprises a glass tube, an electric heating tube, an air bag and an extrusion part, the glass tube is installed at the bottom of the electromagnet assembly, the electric heating tube is installed inside the glass tube, the air bag is arranged inside the glass tube on one side of the electric heating tube, and the extrusion part is installed at the top of the glass tube.
Preferably, the extrusion part comprises a piston rod and a transmission frame, the piston rod is movably mounted on the inner wall of the top of the glass tube, the transmission frame is further mounted on the top of the glass tube, the air bag is matched with the piston rod for use, the piston rod is matched with the transmission frame for use, and the top of the transmission frame is connected with the sealing rotating plate through a metal wire.
Preferably, the air current part is installed to electromagnet assembly one side, and the air current part includes air scraping plate and magnet one, and the air scraping plate has evenly been laid through the axle bed in electromagnet assembly one side of glass pipe top, and the surface of air scraping plate has evenly laid magnet one, and magnet one uses with electromagnet assembly cooperation.
Preferably, the bottom of the sealing rotating plate is provided with a heat dissipation part, the heat dissipation part comprises a sliding groove plate, a soft plate and a magnet II, the sliding groove plate is arranged at the bottom of the sealing rotating plate, the soft plate is movably arranged in the sliding groove plate through a spring, the surface of the soft plate is provided with the magnet II, and the magnet II is matched with the magnet I for use.
Preferably, the starting part is installed to the bottom of spacing cooling tube, and the starting part is including closing switch, switch tube and solenoid valve, and the bottom intermediate position department of spacing cooling tube sets to the arc form, and closing switch is installed to the arcwall face, and closing switch uses with the cooperation of electromagnet assembly, and the switch tube is installed to closing switch's movable part, and the spacing cooling tube surface of switch tube top is provided with the solenoid valve.
Preferably, the limiting mechanism comprises a baffle piece and a spring pin, the baffle piece is arranged on the surface of one side of the protective box and is matched with the battery body, the spring pin is arranged on the surface of the limiting cooling pipe, and the spring pin is matched with a round hole in the surface of the baffle piece.
Compared with the prior art, the invention has the beneficial effects that:
1. this automatic homothermal lithium cell auxiliary device, through electromagnet assembly, electromagnet assembly switch on power supply work, thereby produce magnetic force, adsorb the sheetmetal, thereby make the sheetmetal produce deformation, make sheetmetal and conducting strip laminating, and then make the conducting strip, the sheetmetal, charging head and battery body closed circuit, can be to the charging of battery body, use through the polylith equipment because of the lithium cell, if take place quality problems such as deformation this moment, the centre can certainly expand the extrusion, swell promptly, then can extrude the switch tube among the extrusion process, the use of closing switch can be triggered in the extrusion of switch tube, closing switch triggers can make electromagnet assembly outage, make the battery that has quality problems stop charging, avoid appearing explosion and the emergence of spontaneous combustion accident, compare explosion-proof and protector, quality problems in the lithium cell discover in time, more can protect user's safety.
2. This automatic homothermal lithium cell auxiliary device, through spacing cooling tube, the inside of liquid tank is equipped with the cooling water, and liquid tank and spacing cooling tube pass through the pipeline intercommunication and connect, so the inside of spacing cooling tube also has the cooling water, laying of spacing cooling tube, the surface of laminating battery body, when battery body in-process generates heat, the surface and the inside cooling water of spacing cooling tube still can take away the heat on battery body surface, make battery body be in normal temperature's the environment of charging.
3. This automatic homothermal lithium cell auxiliary device, through the switch tube, quality problems appear in the battery body, when spontaneous combustion conflagration breaks out, the laying of spacing cooling tube and inside cooling water, can prevent flame damage the part of spacing cooling tube top, the flame that spontaneous combustion produced still can be burnt to switch tube department, when reaching the thermal change temperature, its inside hot wire can produce deformation, thereby make the circuit closed, and then the work of steerable solenoid valve, make the inside cooling water of liquid case and shutdown switch discharge from the solenoid valve, because the lithium cell belongs to spontaneous combustion, can only restrain the flame on surface through other substances, make inside group battery cool down through cooling, just can solve the problem that the burning appears because of high temperature, so can play the effect of putting out a fire and preventing the relighting well, the bag makes the electromagnet assembly outage in battery body intermediate position department simultaneously, can also make the circuit disconnection of charging, specifically be the circuit that charging head department is connected, at this moment, the battery body is soaked by the cooling water, can reduce the inside temperature of battery body, so when exceeding normal temperature range, start switch tube triggers the solenoid valve work, through the cooling water case and the cooling water guide of cooling tube that the cooling comes out, can solve the high temperature problem that the high temperature that the battery body appears, the high temperature that the high temperature appears, the explosion appears.
4. This automatic homothermal lithium cell auxiliary device, through the electrothermal tube, when the weather temperature is lower to charge, on the basis of spacing cooling tube and temperature-sensing ware laminating battery body, when temperature-sensing ware detects battery body surface temperature lower, temperature-sensing ware control electrothermal tube inserts the power, the electrothermal tube can produce the heat, the heat of production is after the definite time, can make battery body surface intensification, thereby make the inside electrolyte consistency of battery body reduce, be convenient for going on of charging process, promote the duration of battery after charging, can also avoid because of the temperature is lower, it causes the problem that the battery damaged to charge by force.
5. The automatic constant-temperature lithium battery auxiliary device comprises a sealing rotating plate, an air bag is connected with an electric heating tube, the temperature rise of the electric heating tube can be realized through the expansion of the air bag when the air bag is heated, so that the volume of the air bag can be increased, the structure of the position is mature prior art, the change of the volume of the air bag can extrude gas in the range from a piston rod to the air bag, the piston rod is pushed upwards to eject out, the transmission frame can be pushed to transmit, the downward movement of the transmission frame can pull the sealing rotating plate connected with the top of the transmission frame to move downwards, the sealing rotating plate can be in a closed state when the electric heating tube is heated, a protection box is closed approximately, the temperature rise of a battery body is facilitated, the charging efficiency is improved, when a temperature sensor detects that the battery body reaches a set temperature, the electric heating tube can be controlled to work in a power-off mode, heat can be generated along with the charging of the battery body, the electric heating tube is powered off, the air bag contracts, the piston rod moves under the action of a spring, the transmission plate at the top of the piston rod, the top of the transmission rod is pushed out to transmit upwards through the action of a toothed plate, the sealing rotating plate, the heat dissipated by a heat dissipation groove, the battery body is discharged, the heat dissipation effect is improved, and the charging environment is in a normal temperature.
6. This automatic homothermal lithium cell auxiliary device, through the gasbag, suppose that battery body spontaneous combustion true appearance, the temperature along with flame is to the glass pipe firing, the gasbag can be the inflation constantly, make the piston rod upwards push up tightly fast, and drive the gear frame, the gear frame just can be pulled down sealed revolving plate through the wire and rotate downwards, make the inside of protective housing form confined interval, to a certain extent, reducible combustion-supporting gas's entering, for example, oxygen, so summarize battery body's spontaneous combustion, make it lose ignition point temperature through the cooling water, secondly reduce combustion-supporting gas's entering, make its possibility of spontaneous combustion reduce, the explosion possibility of the same reason also can reduce.
7. This automatic homothermal lithium cell auxiliary device through the wind board, according to the principle that like poles of magnet repel each other, and electromagnet assembly circular telegram can form the repellent effect to magnet one, so can make the wind board rotate, still because of the inside approximate closure of guard box, the rotation of wind board can change the change of inside air current, and the effect is: when the temperature of the charging environment is low and the viscosity of the electrolyte of the electric heating tube is high, and the electric heating tube is electrified to heat the battery body, the wind scraping plate rotates, so that the surface temperature of the electric heating tube can be quickly dissipated into the protective box to heat the battery body; when charging environment temperature risees gradually, the rotation of scraping the aerofoil can discharge from the radiating groove with higher speed the heat, avoids the high temperature to cause the harm to the battery, forms homothermal effect.
8. This automatic homothermal lithium cell auxiliary device, through the soft board, because of the soft board material is softer, though the soft board is located the rotation route of blowing board, but blowing board rotates more slowly, can not influence the structure transmission, according to magnet dysmorphism principle of inhaling mutually, the rotation of magnet one, but two removal certain distances of attractable magnet, the appeal weakens, in the chute board, the soft board still is connected with the spring, so the rotation of blowing board and magnet one can make the soft board form reciprocating motion, thereby when sealed commentaries on classics board open mode, the removal of soft board can promote the thermal discharge in the protecting box.
9. This automatic homothermal lithium cell auxiliary device through the spring catch, through artifical assistance-operated, the position of adjustable baffle spare to press from both sides tightly battery body, cooperation spring catch uses, can go on about and about battery body spacing, avoids rocking in the guard box is inside, and the spring catch is pressed to the change of battery body that can also be convenient for simultaneously, and the position of adjusting baffle spare can be dismantled and change battery body.
Drawings
FIG. 1 is a schematic view of the interior of the protective enclosure of the present invention;
FIG. 2 is a partial schematic view of the present invention;
FIG. 3 is a schematic view of the structure at A in FIG. 2 according to the present invention;
FIG. 4 is a schematic view of another state of motion of the metal sheet of the present invention;
FIG. 5 is a schematic view of another state of motion of the sealing flap of FIG. 3 in accordance with the present invention;
FIG. 6 is a schematic diagram of the inner structure of the switch tube and the variation of the hot metal plate at high temperature;
FIG. 7 is a schematic diagram showing the deformation of the battery body and the change of the closing switch according to the present invention;
fig. 8 is a schematic axial side view of the spring pin of the present invention.
In the figure: 1. a protective box; 101. a charging head; 102. a heat sink; 103. a battery body;
2. an electromagnet assembly; 201. a conductive sheet; 202. a metal sheet; 203. a wind scraping plate; 204. a magnet I;
3. a liquid tank; 301. limiting a cooling pipe; 302. a temperature sensor;
4. an electric heating tube; 401. an air bag;
5. a glass tube; 501. a piston rod; 502. a transmission frame;
6. sealing the rotating plate; 601. a chute plate; 602. a soft board; 603. a second magnet;
7. closing the switch; 701. a switching tube; 702. an electromagnetic valve;
8. a baffle member; 801. and a spring pin.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In the description of the present invention, it should be noted that the terms "upper", "lower", "inner", "outer", "front", "rear", "both ends", "one end", "the other end", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "disposed," "connected," and the like are to be construed broadly, such as "connected," which may be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
Example 1:
as shown in fig. 1 and fig. 2, the automatic constant temperature lithium battery auxiliary device of this embodiment includes protective housing 1, charging head 101, radiating groove 102 and battery body 103, and in addition, the anterior surface of protective housing 1 still is provided with the sealing door, is convenient for take out of battery body 103, and the junction of protective housing 1 AND gate is provided with sealed the pad, promotes the sealed effect of protective housing 1, protection mechanism is installed to protective housing 1 inner wall of radiating groove 102 below, and installs constant temperature mechanism in the protection mechanism, fire-retardant mechanism is installed to one side inner wall of protective housing 1, a side surface mounting of protective housing 1 has stop gear, sealed rotor plate 6 is installed through the pivot in the inside of radiating groove 102.
Specifically, as shown in fig. 3 and 4, the protection mechanism includes electromagnet assembly 2, conducting strip 201 and metal sheet 202, top surface mounting of battery body 103 has metal sheet 202, conducting strip 201 is installed to the protecting box 1 inner wall in the metal sheet 202 outside, electromagnet assembly 2 is installed to the protecting box 1 top inner wall of conducting strip 201 one side, and conducting strip 201, metal sheet 202 and charging head 101 electric connection, the bottom intermediate position department of spacing cooling tube 301 sets to the arc form, closing switch 7 is installed to the arcwall face, closing switch 7 uses with electromagnet assembly 2 cooperation.
When in work: as shown in fig. 3 and 4, when the battery body 103 needs to be charged, the plug is connected with the charging head 101 through manual auxiliary operation, at this time, the plug touches the main switch above the charging head 101, the electromagnet assembly 2 is switched on to work, thereby generating magnetic force, and the metal sheet 202 is adsorbed, thereby causing the metal sheet 202 to deform, so that the metal sheet 202 is attached to the conducting sheet 201, the conducting sheet 201 is made of a harder material, only the metal sheet 202 is deformed in the process of adsorbing the electromagnet assembly 2 to the metal sheet 202, and the conducting sheet 201 and the metal sheet 202 are not deformed, so that the attaching of the conducting sheet 201 and the metal sheet 202 cannot contact the electromagnet assembly 2, as shown in fig. 4, and further causing the conducting sheet 201, the metal sheet 202, the charging head 101 and the battery body 103 to close a loop, thereby charging the battery body 103, as shown in fig. 7, because the lithium batteries are all assembled and used through a plurality of blocks, when quality problems such as deformation occur, the middle is necessarily expanded and extruded, namely, the bulge is raised, the extruding 701 can be extruded during the extruding process, the use of the switch 7 can be triggered, thereby enabling the lithium battery assembly to stop the quality of the lithium battery protection device, and further avoiding the safety accidents of the lithium battery, and the explosion-caused by the explosion-caused safety protection accident of the user.
Example 2:
on the basis of example 1:
as shown in fig. 1 and fig. 2, in the automatic constant temperature lithium battery auxiliary device of the present embodiment, further, the flame retardant mechanism includes a liquid tank 3, a limiting cooling pipe 301 and a temperature sensor 302, the liquid tank 3 is installed on an inner wall of one side of the protection tank 1, the limiting cooling pipe 301 is installed on an inner wall of the protection tank 1 below the liquid tank 3 through a rotating shaft, and the temperature sensor 302 is installed on a surface of the limiting cooling pipe 301; the starting part is installed to the bottom of spacing cooling tube 301, and the starting part is including closing switch 7, switch tube 701 and solenoid valve 702, and the bottom intermediate position department of spacing cooling tube 301 sets to the arc form, and closing switch 7 is installed to the arcwall face, and closing switch 7 uses with the cooperation of electromagnet assembly 2, and switch tube 701 is installed to closing switch 7's movable part, and the spacing cooling tube 301 surface of switch tube 701 top is provided with solenoid valve 702.
When in work: as shown in fig. 1 and 2, on the basis of normal charging of the battery body 103, cooling water is filled in the liquid tank 3, and the liquid tank 3 and the limiting cooling pipe 301 are connected with each other through a pipeline, so that the cooling water is also filled in the limiting cooling pipe 301, the limiting cooling pipe 301 is arranged to be attached to the surface of the battery body 103, and when heat is generated in the charging process of the battery body 103, the surface of the limiting cooling pipe 301 and the internal cooling water can also take away the heat on the surface of the battery body 103, so that the battery body 103 is in a charging environment at normal temperature;
meanwhile, if a quality problem occurs in the battery body 103, when a fire disaster occurs due to spontaneous combustion, the arrangement of the limiting cooling pipe 301 and the internal cooling water can prevent flame from damaging parts above the limiting cooling pipe 301, flame generated by spontaneous combustion can also burn the switch pipe 701, when a thermal change temperature is reached, the internal hot metal wire can deform, so that a circuit is closed, as shown in fig. 6, and further the electromagnetic valve 702 can be controlled to work, so that the cooling water in the liquid tank 3 and the closing switch 7 can be discharged from the electromagnetic valve 702, because the lithium battery is spontaneous combustion, only surface flame can be inhibited through other substances, the problem of combustion due to high temperature can be solved by cooling the internal battery pack, so that the effects of fire extinguishing and re-combustion prevention can be well achieved, meanwhile, the spontaneous combustion bag at the middle position of the battery body 103 can cut off the electromagnet assembly 2, a charging circuit can be disconnected, specifically a circuit connected with the charging head 101 is specifically shown in fig. 3, at this time, the soaking of the battery body 103 by the cooling water can reduce the temperature in the battery body 103, so that when the spontaneous combustion of the battery body 103 exceeds the normal temperature range, the switching pipe is started, the lithium battery can trigger the operation of the switch pipe 701, and the lithium battery body 701, and the internal cooling water can prevent the explosion from occurring.
Example 3:
on the basis of examples 1 and 2:
as shown in fig. 5, 3 and 1, in the automatic constant temperature lithium battery auxiliary device of the present embodiment, further, the constant temperature mechanism includes a glass tube 5, an electric heating tube 4, an air bag 401 and an extrusion component, the glass tube 5 is installed at the bottom of the electromagnet assembly 2, the electric heating tube 4 is installed inside the glass tube 5, the air bag 401 is installed inside the glass tube 5 at one side of the electric heating tube 4, and the extrusion component is installed at the top of the glass tube 5.
When in work: as shown in fig. 5, 3 and 1, when the weather temperature is low, as shown in fig. 3, on the basis that the limiting cooling tube 301 and the temperature sensor 302 are attached to the battery body 103, when the temperature sensor 302 detects that the surface temperature of the battery body 103 is low, as shown in fig. 5, the temperature sensor 302 controls the electric heating tube 4 to be connected to the power supply, the electric heating tube 4 can generate heat, and the generated heat can raise the temperature of the surface of the battery body 103 after a certain time, so that the viscosity of the electrolyte inside the battery body 103 is reduced, the charging process is facilitated, the cruising ability of the charged battery is improved, and the problem of battery damage caused by forced charging due to low temperature can be avoided.
Example 4:
on the basis of examples 1 to 3:
as shown in fig. 5, the automatic constant temperature lithium battery auxiliary device of this embodiment, further, the extrusion component includes piston rod 501 and transmission frame 502, and the inner wall movable mounting at the top of glass tube 5 has piston rod 501, and transmission frame 502 is still installed at the top of glass tube 5, and gasbag 401 uses with piston rod 501 cooperation, and piston rod 501 uses with transmission frame 502 cooperation, and transmission frame 502 top is passed through the wire and is connected with sealed commentaries on classics board 6.
When in work: as shown in fig. 5, on the basis of the operation of the electrical heating tube 4, the airbag 401 is connected with the electrical heating tube 4, the temperature rise of the electrical heating tube 4 can cause the airbag 401 to expand when heated, so that the volume of the airbag 401 can be increased, and the structure of the airbag is a relatively mature prior art, the change of the volume of the airbag 401 can extrude the gas in the interval from the piston rod 501 to the airbag 401, so as to push the piston rod 501 to move, the piston rod 501 is ejected upwards to push the transmission frame 502 to transmit, the transmission frame 502 moves downwards to pull the sealing rotating plate 6 connected to the top of the transmission frame to move downwards, so that when the electrical heating tube 4 is heated, the sealing rotating plate 6 can be in a closed state to cause the protective box 1 to be approximately closed, thereby facilitating the temperature rise of the battery body 103 and improving the charging efficiency, as shown in fig. 3, when the temperature sensor 302 detects that the battery body 103 reaches a set temperature, the electrical heating tube 4 can be controlled to be powered off, the electrical heating operation of the electrical heating tube 4 can be powered, the heating tube 4 is powered off, the airbag 401 contracts, the piston rod 501 moves to the position under the action of the spring, thereby causing the heat dissipation of the battery body to be dissipated into the heat dissipation groove 102, as shown in the normal environment shown in fig. 3, and the heat dissipation groove 102 is discharged by the heat dissipation groove 102;
referring to fig. 3, 1 and 5, if the battery body 103 is spontaneously ignited, the glass tube 5 is ignited by the flame temperature, the airbag 401 will expand continuously, so that the piston rod 501 is pushed up quickly, and the driving frame 502 is driven, and the driving frame 502 will rotate downward by pulling the sealing rotating plate 6 through the metal wire, so that a closed space is formed inside the protection box 1, and the entry of combustion-supporting gas, such as oxygen, can be reduced to a certain extent, so as to summarize the spontaneous combustion of the battery body 103, and the ignition temperature of the battery body is lost through cooling water, and then the entry of combustion-supporting gas is reduced, so that the spontaneous combustion possibility is reduced, and the explosion possibility is also reduced.
Example 5:
on the basis of examples 1 to 4:
as shown in fig. 5, in the automatic constant temperature lithium battery auxiliary device of this embodiment, further, an airflow component is installed on one side of the electromagnet assembly 2, the airflow component includes a wind scraping plate 203 and a first magnet 204, the wind scraping plate 203 is uniformly distributed on one side of the electromagnet assembly 2 above the glass tube 5 through a shaft seat, the first magnet 204 is uniformly distributed on the surface of the wind scraping plate 203, and the first magnet 204 is used in cooperation with the electromagnet assembly 2.
When in work: as shown in fig. 5, on the basis of the power-on operation of the electromagnet assembly 2, according to the principle that like poles of the magnets repel each other, the electromagnet assembly 2 is powered on to form a repelling effect on the first magnet 204, so that the wind-scraping plate 203 can rotate, and the rotation of the wind-scraping plate 203 can change the change of the internal airflow due to the fact that the inside of the protection box 1 is approximately closed, and the function is: when the temperature of the charging environment is low and the viscosity of the electrolyte of the electrothermal tube 4 is high, and the electrothermal tube 4 is electrified to heat the battery body 103, the wind scraping plate 203 rotates, so that the surface temperature of the electrothermal tube 4 can be quickly dissipated into the protective box 1 to heat the battery body 103; when the temperature of the charging environment gradually increases, as shown in fig. 3, the rotation of the wind-scraping plate 203 can accelerate the heat to be discharged from the heat sink 102, so as to avoid the damage to the battery caused by an excessively high temperature, thereby achieving a constant temperature effect.
Example 6:
on the basis of examples 1 to 5:
as shown in fig. 5 and fig. 3, in the automatic constant temperature lithium battery auxiliary device of this embodiment, further, a heat dissipation component is installed at the bottom of the sealing rotating plate 6, the heat dissipation component includes a sliding groove plate 601, a soft plate 602 and a second magnet 603, the sliding groove plate 601 is installed at the bottom of the sealing rotating plate 6, the soft plate 602 is movably installed inside the sliding groove plate 601 through a spring, the second magnet 603 is installed on the surface of the soft plate 602, and the second magnet 603 is used in cooperation with the first magnet 204.
When in work: as shown in fig. 5 and 3, based on the rotation of the wind-scraping plate 203 and the first magnet 204, because the soft plate 602 is made of a soft material, in fig. 5, although the soft plate 602 is located on the rotation path of the wind-scraping plate 203, the wind-scraping plate 203 rotates slowly, and the structural transmission is not affected, please refer to fig. 5 and 3, according to the principle that the magnet is deformed and attracted, the magnet 204 rotates, the magnet 603 can be attracted to move for a certain distance, the attraction is weakened, and the soft plate 602 is further connected to a spring in the chute plate 601, so that the rotation of the wind-scraping plate 203 and the magnet 204 can make the soft plate 602 move back and forth, and thus when the seal rotating plate 6 is opened, the movement of the soft plate 602 can improve the heat discharge inside the protection box 1.
Example 7:
on the basis of examples 1 to 6:
as shown in fig. 1 and 8, in the automatic constant temperature lithium battery auxiliary device of the embodiment, further, the limiting mechanism includes a baffle member 8 and a spring pin 801, the baffle member 8 is installed on one side surface of the protective case 1, the baffle member 8 is used in cooperation with the battery body 103, the spring pin 801 is installed on the surface of the limiting cooling pipe 301, and the spring pin 801 is used in cooperation with a circular hole on the surface of the baffle member 8.
When in work: as shown in fig. 1 and 8, the position of the baffle member 8 can be adjusted through manual assistance operation, so that the battery body 103 is clamped and is matched with the spring pin 801 to be used, the battery body 103 can be limited up and down and left and right, the situation that the battery body 103 is shaken inside the protective box 1 is avoided, meanwhile, the battery body 103 can be conveniently replaced, the spring pin 801 is pressed, the position of the baffle member 8 is adjusted, and the battery body 103 can be detached and replaced.
The working principle of the invention is as follows: when the battery body 103 is charged, as shown in fig. 3 and 4, when the battery body 103 needs to be charged, the plug is connected with the charging head 101 through manual auxiliary operation, at this time, the plug touches a main switch above the charging head 101, the electromagnet assembly 2 is switched on to work, so that magnetic force is generated, the metal sheet 202 is adsorbed, so that the metal sheet 202 is deformed, the metal sheet 202 is attached to the conducting sheet 201, the conducting sheet 201 is made of a harder material, only the metal sheet 202 is deformed in the process of adsorbing the metal sheet 202 by the electromagnet assembly 2, and the conducting sheet 201 is not deformed, so that the attaching of the conducting sheet 201 and the metal sheet 202 cannot contact the electromagnet assembly 2, as shown in fig. 4, so that the conducting sheet 201, the metal sheet 202, the charging head 101 and the battery body 103 are closed in a loop, the self-ignition battery body 103 can be charged, as shown in fig. 7, because the lithium batteries are all assembled for use, at this time, when quality problems such as deformation and the like occur, the middle is certainly expanded and extruded to cause the problem that a user can be triggered to cause an explosion protection accident of the lithium battery 2, and the problem of the lithium battery can be caused, and the explosion protection device can be avoided, and the user can be further caused by the explosion accident caused by the occurrence of the explosion protection problem of the lithium battery protection device, and the occurrence of the lithium battery protection device, and the occurrence of the explosion protection device, wherein the explosion protection device, and the problem can be further caused by the explosion protection device, and the problem can be avoided;
when spontaneous combustion and explosion are avoided, as shown in fig. 1 and fig. 2, on the basis of normal charging of the battery body 103, cooling water is filled in the liquid tank 3, and the liquid tank 3 and the limiting cooling pipe 301 are communicated and connected through a pipeline, so that the cooling water is also arranged in the limiting cooling pipe 301, the limiting cooling pipe 301 is arranged and attached to the surface of the battery body 103, and when heat is generated in the charging process of the battery body 103, the surface of the limiting cooling pipe 301 and the cooling water in the limiting cooling pipe 301 can take away heat on the surface of the battery body 103, so that the battery body 103 is in a charging environment at normal temperature;
meanwhile, if the quality problem of the battery body 103 occurs, when a fire disaster occurs due to spontaneous combustion, the arrangement of the limit cooling pipe 301 and the internal cooling water can prevent flame from damaging parts above the limit cooling pipe 301, flame generated by spontaneous combustion can also burn the switch pipe 701, when the temperature reaches a thermal change temperature, the internal hot metal wire can deform, so that a circuit is closed, as shown in fig. 6, and further the electromagnetic valve 702 can be controlled to work, so that the cooling water in the liquid tank 3 and the closing switch 7 can be discharged from the electromagnetic valve 702, because the lithium battery belongs to spontaneous combustion, only surface flame can be inhibited through other substances, and the problem of combustion due to high temperature can be solved by cooling the internal battery pack, so that the effects of fire extinguishing and re-combustion prevention can be well achieved, meanwhile, the spontaneous combustion bag at the middle position of the battery body 103 can cut off the electromagnet assembly 2, a charging circuit can be disconnected, specifically a circuit connected with the charging head 101 is specifically shown in fig. 3, at this time, the battery body 103 is soaked by the cooling water, so that the temperature in the battery body 103 can be reduced, and the problem of the combustion of the lithium battery body can be solved, when the spontaneous combustion of the lithium battery is triggered, and the high-temperature of the switch pipe 701 and the lithium battery body 701 can be avoided;
when the temperature is low and the electrolyte in the battery body 103 is sticky, as shown in fig. 5, 3 and 1, when the charging is performed at a low weather temperature, firstly as shown in fig. 3, on the basis that the limiting cooling pipe 301 and the temperature sensor 302 are attached to the battery body 103, when the temperature sensor 302 detects that the surface temperature of the battery body 103 is low, as shown in fig. 5, the temperature sensor 302 controls the electrothermal tube 4 to be connected to a power supply, the electrothermal tube 4 can generate heat, and the generated heat can raise the surface of the battery body 103 after a certain time, so that the viscosity of the electrolyte in the battery body 103 is reduced, the charging process is facilitated, the cruising ability of the charged battery is improved, and the problem of battery damage caused by forced charging due to low temperature can be avoided;
when the heat dissipation groove 102 has quality problem, as shown in fig. 5, on the basis of the operation of the electrothermal tube 4, the airbag 401 is connected with the electrothermal tube 4, the temperature rise of the electrothermal tube 4 can make the airbag 401 expand by heating, so the volume of the airbag 401 can increase, the structure is a mature prior art, the change of the volume of the airbag 401 can extrude the gas in the interval from the piston rod 501 to the airbag 401, thereby the piston rod 501 is pushed to move, the piston rod 501 is pushed upwards to eject, the transmission frame 502 is pushed to transmit, the transmission frame 502 moves downwards, the sealing rotating plate 6 connected with the top of the transmission frame is pulled to move downwards, so when the electrothermal tube 4 is heated, the sealing rotating plate 6 is in a closed state, the protection box 1 is approximately closed, the temperature rise of the battery body 103 is facilitated, the charging efficiency is improved, as shown in fig. 3, when the temperature sensor 302 detects that the battery body 103 reaches a set temperature, the electric heating tube 4 can be controlled to be powered off to work, heat can be generated along with the charging of the battery body 103, the electric heating tube 4 is powered off, the air bag 401 contracts, the piston rod 501 moves to the position under the action of the spring, the transmission frame 502 is driven upwards through the action of the toothed plate at the top of the piston rod 501 as shown in fig. 3, the sealing rotating plate 6 is ejected, heat dissipated by the battery body 103 is discharged through the heat dissipation groove 102, the heat dissipation effect is improved, and the charging environment is within a normal temperature;
as shown in fig. 3, fig. 1 and fig. 5, if the battery body 103 is spontaneously ignited, the glass tube 5 is ignited by the flame temperature, the airbag 401 is continuously expanded, so that the piston rod 501 is rapidly pushed upwards and drives the transmission frame 502, the transmission frame 502 pulls down the sealing rotating plate 6 through the metal wire to rotate downwards, so that a closed space is formed inside the protection box 1, and the entry of combustion-supporting gas, such as oxygen, can be reduced to a certain extent, so that the spontaneous combustion of the battery body 103 is reviewed, the ignition point temperature of the battery body is lost through cooling water, the entry of combustion-supporting gas is reduced, the possibility of spontaneous combustion is reduced, and the possibility of explosion in the same manner is also reduced;
during automatic constant temperature, as shown in fig. 5, on the basis of the circular telegram work of electromagnet assembly 2, according to the principle that like poles of magnet repel each other, electromagnet assembly 2 circular telegram can form the repellent effect to magnet 204, so can make the windbreak 203 rotate, still because of the inside approximate closure of protective housing 1, the rotation of windbreak 203 can change the change of inside air current, and the effect is: when the temperature of the charging environment is low and the viscosity of the electrolyte of the electrothermal tube 4 is high, and the electrothermal tube 4 is electrified to heat the battery body 103, the wind scraping plate 203 rotates, so that the surface temperature of the electrothermal tube 4 can be quickly dissipated into the protective box 1 to heat the battery body 103; when the temperature of the charging environment gradually increases, as shown in fig. 3, the rotation of the wind-scraping plate 203 can accelerate the heat to be discharged from the heat-dissipating slot 102, so as to avoid the damage to the battery caused by an excessively high temperature, and form a constant temperature effect;
when the constant temperature effect is further improved, as shown in fig. 5 and 3, on the basis of the rotation of the wind-scraping plate 203 and the first magnet 204, since the soft plate 602 is made of a softer material, in fig. 5, although the soft plate 602 is located on the rotation path of the wind-scraping plate 203, the wind-scraping plate 203 rotates slowly, and the structural transmission is not affected, please refer to fig. 5 and 3, according to the principle that the first magnet 204 rotates according to the abnormal attraction of the magnet, the second magnet 603 can be attracted to move for a certain distance, the attraction is weakened, in the chute plate 601, the soft plate 602 is further connected with a spring, so that the rotation of the wind-scraping plate 203 and the first magnet 204 can make the soft plate 602 form a reciprocating movement, and thus when the seal rotating plate 6 is in the open state, the movement of the soft plate 602 can improve the discharge of heat inside the protection box 1.
Finally, it should be noted that: although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that changes may be made in the embodiments and/or equivalents thereof without departing from the spirit and scope of the invention. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims (1)

1. The utility model provides an automatic homothermal lithium cell auxiliary device, includes protective housing, the head that charges, radiating groove and battery body, its characterized in that: the heat dissipation device is characterized in that a protection mechanism is mounted on the inner wall of a protection box below a heat dissipation groove, a constant temperature mechanism is mounted on the protection mechanism, a flame retardant mechanism is mounted on the inner wall of one side of the protection box, a limiting mechanism is mounted on the surface of one side of the protection box, a sealing rotating plate is mounted inside the heat dissipation groove through a rotating shaft, the protection mechanism comprises an electromagnet assembly, a conducting strip and a metal sheet, the metal sheet is mounted on the surface of the top of a battery body, the conducting strip is mounted on the inner wall of the protection box outside the metal sheet, the electromagnet assembly is mounted on the inner wall of the top of the protection box on one side of the conducting strip, the metal sheet and a charging head are electrically connected, the electromagnet assembly is switched on to work to generate magnetic force to adsorb the metal sheet, the metal sheet is deformed, the metal sheet is attached to the conducting strip, the conducting strip is made of hard material, only the metal sheet is deformed in the process of adsorbing the conducting strip by the electromagnet assembly, the conducting strip is not deformed, the metal sheet is attached to the metal sheet, the electromagnet assembly, the electromagnetic assembly cannot contact with the electromagnet assembly, the flame retardant mechanism comprises a liquid box, a limiting cooling pipe is mounted on the inner wall of the inner wall below the liquid box through the rotating shaft, and the surface of the limiting cooling pipe is mounted on the surface of the temperature sensor; the bottom of the limiting cooling pipe is provided with a starting part, the starting part comprises a closing switch, a switch pipe and an electromagnetic valve, the middle position of the bottom of the limiting cooling pipe is arranged to be arc-shaped, the arc-shaped surface is provided with the closing switch, the closing switch is matched with the electromagnet assembly for use, the movable part of the closing switch is provided with the switch pipe, the surface of the limiting cooling pipe above the switch pipe is provided with the electromagnetic valve, the constant temperature mechanism comprises a glass pipe, an electric heating pipe, an air bag and an extrusion part, the bottom of the electromagnet assembly is provided with the glass pipe, the electric heating pipe is arranged inside the glass pipe, the air bag is arranged inside the glass pipe on one side of the electric heating pipe, the extrusion part is arranged at the top of the glass pipe and comprises a piston rod and a transmission frame, the piston rod is movably arranged on the inner wall of the top of the glass pipe, the transmission frame is also arranged at the top of the glass pipe, the air bag is matched with the piston rod for use, the top of the transmission frame is connected with the sealing rotating plate through a metal wire, one side of the electromagnet assembly is provided with an airflow component, the airflow component comprises a wind scraping plate and a first magnet, the wind scraping plate is uniformly distributed on one side of the electromagnet assembly above the glass tube through a shaft seat, the first magnet is uniformly distributed on the surface of the wind scraping plate and is matched with the electromagnet assembly for use, on the basis of the electrification work of the electromagnet assembly, according to the principle that like poles of the magnets repel each other, the electromagnet assembly is electrified to form a repelling effect on the first magnet, so that the wind scraping plate can rotate, the bottom of the sealing rotating plate is provided with a heat dissipation component, the heat dissipation component comprises a chute plate, a soft plate and a second magnet, the bottom of the sealing rotating plate is provided with the chute plate, the soft plate is movably arranged inside the chute plate through a spring, the second magnet is arranged on the surface of the soft plate, and the second magnet is matched with the first magnet for use, according to the opposite attraction principle of the magnets, the magnets I rotate to attract the magnets II to move for a certain distance, the soft board is further connected with the spring in the chute board, so that the soft board can move in a reciprocating mode through rotation of the wind scraping board and the magnets I, the limiting mechanism comprises a baffle piece and a spring pin, the baffle piece is arranged on the surface of one side of the protective box and is matched with the battery body, the spring pin is arranged on the surface of the limiting cooling pipe, and the spring pin is matched with the round hole in the surface of the baffle piece.
CN202210122241.8A 2022-02-09 2022-02-09 Automatic constant temperature lithium battery auxiliary device Active CN114447410B (en)

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CN115377572B (en) * 2022-08-01 2024-04-09 国核电力规划设计研究院有限公司 New energy battery box with protective performance
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CN205355196U (en) * 2016-02-03 2016-06-29 连云港市云海电源有限公司 Charging protection storage battery
CN208835151U (en) * 2018-11-09 2019-05-07 福建国冠新能源科技有限公司 A kind of protective device that can prevent lithium ion battery from crossing thermal expansion
CN209729977U (en) * 2019-01-28 2019-12-03 江苏金派克新能源有限公司 A kind of lithium battery box radiator
CN112259859A (en) * 2020-10-13 2021-01-22 建德希傅电子科技有限公司 Automobile lithium battery pack protection device
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