CN113488712A - Discharging device and method for intermittent closed power lithium battery - Google Patents

Discharging device and method for intermittent closed power lithium battery Download PDF

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Publication number
CN113488712A
CN113488712A CN202110758822.6A CN202110758822A CN113488712A CN 113488712 A CN113488712 A CN 113488712A CN 202110758822 A CN202110758822 A CN 202110758822A CN 113488712 A CN113488712 A CN 113488712A
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CN
China
Prior art keywords
discharging
battery module
discharge
closed
battery
Prior art date
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Pending
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CN202110758822.6A
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Chinese (zh)
Inventor
卢世杰
周宏喜
苏勇
孙小旭
何建成
姚建超
郎平振
杨俊平
王芏卜
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BGRIMM Machinery and Automation Technology Co Ltd
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BGRIMM Machinery and Automation Technology Co Ltd
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Priority to CN202110758822.6A priority Critical patent/CN113488712A/en
Publication of CN113488712A publication Critical patent/CN113488712A/en
Pending legal-status Critical Current

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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
    • H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
    • H01M10/44—Methods for charging or discharging
    • 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
    • H01M10/54—Reclaiming serviceable parts of waste accumulators
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
    • H02J7/0063—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with circuits adapted for supplying loads from the battery
    • 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
    • Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
    • Y02W30/00—Technologies for solid waste management
    • Y02W30/50—Reuse, recycling or recovery technologies
    • Y02W30/84—Recycling of batteries or fuel cells

Abstract

The invention provides a discharging device of an intermittent closed power lithium battery, which comprises: the device comprises a battery module feeding device, a closed discharging device and a battery module discharging device; one end of the closed discharging device is connected with the battery module feeding device, and the other end of the closed discharging device is connected with the battery module discharging device. The invention also provides a discharging method using the device, which comprises the following steps: feeding: the charged battery module or the single battery cell completes charging through a battery module charging device; discharging: the battery module feeding device conveys the charged battery module or the monomer battery cell to the closed discharging device to complete discharging; blanking: the battery module or the single battery cell after discharging is sent into a warehouse shelf for storage through a battery module blanking device. The invention completes the discharging process of the power lithium battery in a closed space, reduces the manual participation degree in the discharging process of the battery, and improves the mechanization level and the working efficiency of a discharging system.

Description

Discharging device and method for intermittent closed power lithium battery
Technical Field
The invention relates to the technical field of new energy automobile power battery discharging, in particular to a discharging device and method of an intermittent closed power lithium battery.
Background
The voltage of the power battery is generally 380V, residual electric quantity still exists after decommissioning, and in order to safely and efficiently carry out recycling work of the waste power battery, the power battery needs to be subjected to discharge treatment firstly, and then the power battery can enter a disassembling process when the discharge is below the safe voltage.
After being retired, the new energy automobile power lithium battery is detected to meet the cascade utilization standard and then enters a cascade utilization link, otherwise, the new energy automobile power lithium battery is directly recycled. The battery pack of the power lithium battery is usually subjected to discharge treatment by adopting a charge-discharge test cabinet, and because communication protocols of battery management systems of some manufacturers are not opened outwards, the battery pack cannot be discharged safely, and the battery pack needs to be disassembled into battery modules or single battery cores manually and then subjected to discharge treatment. The discharge mode of the waste power battery mainly comprises physical discharge and chemical discharge, wherein the physical discharge mainly comprises a discharge test cabinet discharge method, an external load resistance discharge method, a freezing low-temperature discharge method, a perforation discharge method and the like; the chemical discharge is mainly a sodium chloride solution discharge system, and the residual electric quantity in the battery is consumed by utilizing the electrolysis process in the solution.
The existing battery discharge technology and technology are applied more in the pretreatment of power lithium batteries, but still have some defects:
1) the discharge cabinet discharge method and the low-temperature freezing discharge method have high cost, the external load resistor has long discharge time and is easy to generate heat, and the perforation discharge has potential safety hazards under the condition of high residual electric quantity;
2) the existing physical discharge mode is generally manual wiring, the charging and discharging of the battery module and the single battery core in the chemical discharge mode are manually operated, the labor intensity is high, the working efficiency is low, and potential safety hazards exist.
Disclosure of Invention
The invention aims to solve the problems of the existing waste lithium battery discharging process and technology, completes the discharging process of the power lithium battery in a closed space, reduces the manual participation in the battery discharging process, and improves the mechanization level and the working efficiency of a discharging system.
The invention provides a discharge device of an intermittent closed power lithium battery, which comprises: the device comprises a battery module feeding device, a closed discharging device and a battery module discharging device; one end of the closed discharging device is connected with the battery module feeding device, and the other end of the closed discharging device is connected with the battery module discharging device.
Further, still include exhaust treatment device, exhaust treatment device with closed discharge device is connected.
Further, the sealed discharge device includes: the device comprises a discharge reaction box body, a battery module conveying mechanism, a discharge medium replenishing port, a discharge medium emptying port and an exhaust port; the main body of the battery module conveying mechanism is arranged in the discharge reaction box body, one end of the main body extends out and is positioned in a feeding port on the outer side of the discharge reaction box body, and the other end of the main body extends out and is positioned in a discharging port on the outer side of the discharge reaction box body; the discharge medium replenishing port is arranged at the top or the side wall of the discharge reaction box body; the discharge medium vent is arranged at the bottom of the discharge reaction box body; the exhaust port is arranged at the top of the discharge reaction box body.
The discharge reaction box further comprises a cooling water jacket, wherein the cooling water jacket is arranged on the outer wall of the discharge reaction box body, and a water inlet and a water outlet are respectively arranged on the cooling water jacket.
Further, switch devices are arranged on the feeding port and the discharging port.
Furthermore, a partition plate and a skirt edge are arranged on the battery module conveying mechanism.
Further, a plurality of liquid discharge holes are further formed in the battery module conveying mechanism.
Further, the waste gas treatment device comprises an alkali liquor spray tower, an active carbon adsorption tower and a centrifugal fan which are connected in sequence; the air inlet end of the alkali liquor spray tower is connected with the air outlet of the closed discharge device, and the air outlet of the centrifugal fan is connected with the air inlet arranged on the discharge port.
Further, still include the alkali lye circulating pump, the alkali lye circulating pump with the alkali lye spray column is connected.
The invention also provides a discharging method using the discharging device, which comprises the following steps:
feeding: the charged battery module or the single battery cell completes charging through a battery module charging device;
discharging: the battery module feeding device conveys the charged battery module or the monomer battery cell to the closed discharging device to complete discharging;
blanking: the battery module or the single battery cell after discharging is sent into a warehouse shelf for storage through a battery module blanking device.
Further, after discharging, still including drying by blowing, the battery module or monomer electricity core surface after discharging is dried by blowing promptly and is handled.
Further, the method also comprises waste gas treatment, namely waste gas generated in the discharging process enters a waste gas treatment device through a closed discharging device.
Further, the negative pressure induced air device also comprises a negative pressure induced air device, namely, the negative pressure induced air device is used for providing negative pressure airflow for the closed discharging device.
Compared with the prior art, the invention has the beneficial effects that: the discharging process of the power lithium battery is completed in a closed space, so that the environmental pollution is reduced; in the process of feeding and discharging, the manual participation degree is reduced by the battery module feeding device and the battery module discharging device, and the mechanization level and the working efficiency of the discharging device are improved.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and other drawings can be obtained by those skilled in the art without creative efforts.
FIG. 1 is a schematic diagram of a lithium battery discharge device according to an embodiment of the present invention;
FIG. 2 is a schematic view of an exhaust gas treatment device according to an embodiment of the present invention;
fig. 3 is a schematic view of a conveyor belt of a battery module conveying mechanism according to an embodiment of the invention;
FIG. 4 is a process flow diagram of the discharge system of the present invention.
Description of reference numerals:
1: a battery module feeding device; 2: a feed port; 3: a battery module conveying mechanism; 4: a closed discharge device; 5: a cooling water jacket; 6: a liquid discharge medium; 7: a discharge outlet; 8: a battery module blanking device; 9: a switching device; 10: an alkali liquor spray tower; 11: an alkali liquor circulating pump; 12: an activated carbon adsorption tower; 13: a centrifugal fan; 14: a discharge medium replenishing port; 15: a discharge medium vent; 16: an exhaust port; 17: a water inlet; 18: a water outlet; 19: an air inlet; 20: an air inlet end; 21: an air outlet; 22: and a liquid discharge hole.
Detailed Description
The technical solutions of the present invention will be described clearly and completely with reference to the following embodiments, and it should be understood that the described embodiments are some, but not all, embodiments of the present invention. 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 is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", and the like, indicate orientations and positional relationships based on those shown in the drawings, and are used only for convenience of description and simplicity of description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be considered as limiting the present invention.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, features defined as "first", "second", may explicitly or implicitly include one or more of the described features. In the description of the present invention, "a plurality" means two or more unless specifically defined otherwise. Furthermore, the terms "mounted," "connected," and "connected" are to be construed broadly and may, for example, 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.
As shown in fig. 1 to 3, the present invention provides a discharging device for an intermittent sealed power lithium battery, including: battery module loading attachment 1, closed discharge device 4, battery module unloader 8 and exhaust treatment device. One end of the closed discharging device 4 is connected with the battery module feeding device 1, the other end of the closed discharging device is connected with the battery module discharging device 8, and the waste gas treatment device is connected with the closed discharging device 4. Battery module loading attachment 1 generally adopts band conveyer, and battery module unloader 8 generally adopts band conveyer, cylinder conveyer or AGV car. The discharging process of the power lithium battery is completed in the closed discharging device 4, and the waste gas generated by discharging is collected, purified and discharged in a centralized manner, so that the environmental pollution is reduced.
In a more preferred embodiment, the sealed discharge device 4 comprises: the device comprises a discharge reaction box body, a battery module conveying mechanism 3, a discharge medium replenishing port 14, a discharge medium emptying port 15 and an exhaust port 16. Adding a liquid discharge medium 6 into the discharge reaction box body for discharging, wherein the liquid discharge medium 6 is sodium sulfate, copper sulfate or zinc sulfate and the like, the concentration of the liquid discharge medium 6 is 2-20%, and the preferred concentration range is 4-6%; the discharge time is 12 to 72 hours, preferably 12 to 24 hours. The voltage of the battery module after discharging is preferably 1-4V, and the voltage of the single battery cell after discharging is preferably below 0.5V. The liquid discharging medium 6 only needs to immerse the anode and the cathode of the battery module, and the immersion height H is 10-15 mm.
The main body of the battery module conveying mechanism 3 is arranged in the discharge reaction box body, one end of the main body extends out and is positioned in the feeding port 2 on the outer side of the discharge reaction box body, and the other end of the main body extends out and is positioned in the discharging port 7 on the outer side of the discharge reaction box body. The battery module conveying mechanism 3 preferably employs a belt conveyor. The feed opening 2 and the discharge opening 7 are both designed to be inclined, so that the impact force is too large when the battery module falls, and the buffering effect is achieved. The feed port 2 is located at the front end of the sealed discharge device 4, and is capable of guiding the battery module conveyed by the battery module feeding device 1 onto the battery module conveying mechanism 3. A switching device 9 is provided on both the supply opening 2 and the discharge opening 7. The switching device 9 is preferably a sealed valve for air-tight sealing against gas leakage during discharge. The valve is an electric gate valve.
The discharging medium replenishing port 14 is arranged at the top or the side wall of the discharging reaction box body and is used for adding the liquid discharging medium 6. And a discharge medium vent 15 is arranged at the bottom of the discharge reaction box body and is used for discharging the liquid discharge medium 6. The exhaust port 16 is arranged at the top of the discharge reaction box body and is communicated with the waste gas treatment device.
In a more preferred embodiment, the device further comprises a cooling water jacket 5, wherein the cooling water jacket 5 is arranged on the outer wall of the discharge reaction box body, and a water inlet 17 and a water outlet 18 are respectively arranged on the cooling water jacket 5. The water inlet 17 is arranged below the water outlet 18 is arranged above the water inlet, and the water inlet and the water outlet can be communicated with a normal-temperature tap water pipe or can be cooled by adopting a cooling tower.
In a more preferred embodiment, in order to ensure that the module does not contact with the adjacent module when being lifted and lowered and does not slide and collide, a partition and a skirt are designed on the battery module conveying mechanism 3, a plurality of drain holes 22 are formed on the surface of the battery module conveying mechanism 3, and the drain holes 22 can be circular or square. The effective width L of the battery module conveying mechanism 3 is larger than the length of the conventional battery module by 50-100mm, generally 600-700mm, the height of the partition is larger than the height of the conventional battery module by 10-30mm, generally 130-150mm, and the distance W of the partition is larger than the width of the conventional battery module by 10-30mm, generally 170-200 mm.
In a more preferred embodiment, the bottom of the discharge opening 7 is provided with an inclined plate, the inclination angle α of which is typically 3 to 5 °, for returning the liquid discharge medium 6 on the surface of the battery module after discharge from the discharge hole 22 to the interior of the discharge reaction chamber. The inclined plate can avoid the residual of the liquid discharge medium 6, reduce peculiar smell and reduce the loss of the liquid discharge medium 6.
In a more preferred embodiment, the waste gas treatment device comprises a lye spray tower 10, an activated carbon adsorption tower 12 and a centrifugal fan 13 which are connected in sequence. An air inlet end 20 of the alkali liquor spray tower 10 is connected with an air outlet 16 of the closed discharge device 4, and an air outlet 21 of the centrifugal fan 13 is connected with an air inlet 19 arranged on the discharge port 7. And the liquid discharge medium 6 on the surface of the battery module at the discharge outlet 7 is blown into the gas at the gas inlet 19 by the centrifugal fan 13 for drying and then is discharged, so that the loss of the liquid discharge medium 6 is reduced, and the working environment is improved. The device also comprises an alkali liquor circulating pump 11, and the alkali liquor circulating pump 11 is connected with the alkali liquor spray tower 10. The alkali solution in the alkali solution spray tower 10 can be NaOH or Ca (OH)2Or KOH, a preferred alkaline medium being CaO.
As shown in fig. 4, the present invention also provides a discharging method using the discharging device, including the steps of:
feeding: electrified battery module or monomer electricity core pass through battery module loading attachment 1 and accomplish the material loading.
Discharging: the battery module feeding device 1 transports the charged battery module or the monomer battery cell to the closed discharging device 4 to complete discharging. The charged battery module or single battery cell enters the battery module conveying mechanism 3 through the feeding port 2, slowly enters the closed discharging device 4 through the battery module conveying mechanism 3, and the positive electrode and the negative electrode of the battery module are immersed in the liquid discharging medium 6 for a certain time to complete discharging (the voltage is below a safety value). The switch devices 9 at the feeding port 2 and the discharging port 7 are in a closed state during discharging, so that the discharging process is completed in a closed space, and the generated waste gas is recycled after purification treatment, and no environmental pollution is caused. During the discharge, the lye circulating pump 11 and the centrifugal fan 13 in the waste gas treatment device are in operation.
Drying: the process is mainly used for blow-drying the surface of the discharged battery module, and the blown liquid medium returns to the 4-closed discharge system along the inclined plate on the left side of the discharge outlet 7, so that the residue of the liquid discharge medium 6 is avoided, the peculiar smell is reduced, and the loss of the liquid medium is reduced. The air flow required by the drying process is provided by a centrifugal fan 13.
Blanking: and the battery module after discharging and drying the liquid discharging medium 6 on the surface is fed into a warehouse shelf for storage through a battery module blanking device 8.
In a more preferred embodiment, the method further comprises the step of treating the exhaust gas, i.e. the exhaust gas generated in the discharge process enters the exhaust gas treatment device through the closed discharge device 4.
The liquid discharge medium 6 is adopted to mainly generate hydrogen or oxygen when the battery module discharges, when the discharge time is too long, electrolyte leakage is caused after the positive electrode or the explosion-proof hole of the battery is dissolved, and the electrolyte reacts with water to generate toxic HF gas to generate strong stimulation to a human body. Waste gas generated in the discharging process enters the waste gas treatment device through the exhaust port 16 at the top end of the closed discharging device 4 for treatment, most of acid substances in the waste gas are firstly absorbed and removed through alkali liquor, and then the waste gas is subjected to secondary treatment through activated carbon adsorption and then returns to the air inlet 19 at the top end of the discharge port 7 through the centrifugal fan 13 for drying operation.
Alkali liquor absorption: during discharging, hydrogen or oxygen is mainly generated, and a small amount of acid substances are also contained, particularly, volatile matters of electrolyte in the battery generate HF gas when meeting water. When the gas passes through the spraying layer of the alkali liquor spraying tower 10, the gas and the alkali liquor undergo neutralization reaction, so that acid substances in the gas are removed. The alkali liquor can be NaOH, Ca (OH)2 or KOH, and the preferable alkaline medium is CaO.
Activated carbon adsorption: organic matter molecules or molecular groups distributed in gas are adsorbed by utilizing surface acting force generated by the microporous structure of the activated carbon, and the adsorbed organic solvent is changed into liquid through oil-gas phase change and is gathered in micropores of the activated carbon, so that the effect of removing organic components in the gas is achieved. After the activated carbon is used for a period of time, a large amount of adsorbate is adsorbed, the working capacity is lost after saturation, and the activated carbon penetrates through a filter layer in serious cases and needs to be regenerated or replaced regularly. The activated carbon adsorption unit is typically an activated carbon adsorption column 12.
In a more preferred embodiment, a negative pressure induced draft is further included, that is, a negative pressure air flow is provided to the sealed discharge device 4 by using a negative pressure induced draft device. The negative pressure induced air operation aims at providing negative pressure airflow for the closed discharge device 4, which is helpful for the gas generated in the discharge process to be rapidly discharged and avoid leakage, then the waste gas is discharged after alkali liquor spraying absorption and activated carbon adsorption treatment, and an air outlet 21 of the negative pressure induced air operation is communicated with an air inlet 19 at the top end of the discharge opening 7. The negative pressure induced draft device can be an industrial centrifugal fan 13.
The working principle of the invention is as follows:
the charged battery module or single battery core enters a battery module conveying mechanism 3 of a closed discharging device 4 through a battery module feeding device 1, the battery module conveying mechanism 3 slowly operates to enable the positive electrode and the negative electrode of the battery module to be immersed in a liquid discharging medium 6, a water inlet pipe valve of a cooling water jacket 5 is opened when the temperature of the liquid discharging medium 6 in the closed discharging device 4 is higher in the discharging process, and the discharged battery module is conveyed to a battery module discharging device 8 through the battery module conveying mechanism 3 and enters a warehouse shelf for storage. Waste gas generated in the discharging process enters the waste gas treatment device for purification through a top end exhaust port 16 of the closed discharging device 4, and the treated gas is discharged by the centrifugal fan 13 and is conveyed to a gas inlet 19 at the top end of the discharging port 7 for drying the liquid discharging medium 6 on the surface of the discharged battery module.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the invention has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention.

Claims (13)

1. The utility model provides a discharge device of airtight power lithium cell of intermittent type formula which characterized in that includes: the device comprises a battery module feeding device (1), a closed discharging device (4) and a battery module discharging device (8); one end of the closed discharging device (4) is connected with the battery module feeding device (1), and the other end of the closed discharging device is connected with the battery module discharging device (8).
2. A discharge device for an intermittent sealed power lithium battery as claimed in claim 1, characterized by further comprising an exhaust gas treatment device, wherein said exhaust gas treatment device is connected with said sealed discharge device (4).
3. A discharge device for an intermittent closed power lithium battery as claimed in claim 2, characterized in that said closed discharge device (4) comprises: the device comprises a discharge reaction box body, a battery module conveying mechanism (3), a discharge medium replenishing port (14), a discharge medium emptying port (15) and an exhaust port (16); the main body of the battery module conveying mechanism (3) is arranged in the discharge reaction box body, one end of the main body extends out and is positioned in a feeding port (2) on the outer side of the discharge reaction box body, and the other end of the main body extends out and is positioned in a discharging port (7) on the outer side of the discharge reaction box body; the discharge medium replenishing port (14) is arranged at the top or the side wall of the discharge reaction box body; the discharge medium vent (15) is arranged at the bottom of the discharge reaction box body; the exhaust port (16) is arranged at the top of the discharge reaction box body.
4. A discharging device of an intermittent closed power lithium battery as claimed in claim 3, characterized by further comprising a cooling water jacket (5), wherein the cooling water jacket (5) is arranged on the outer wall of the discharging reaction box body, and a water inlet (17) and a water outlet (18) are respectively arranged on the cooling water jacket (5).
5. A discharge device for an intermittent closed power lithium battery as claimed in claim 3, characterized in that switch means (9) are provided on both the feeding port (2) and the discharge port (7).
6. A discharging device of an intermittent type closed power lithium battery as claimed in claim 1, characterized in that a separator and a skirt are provided on the battery module conveying mechanism (3).
7. A discharging device of an intermittent type closed power lithium battery as claimed in claim 6, characterized in that a plurality of drain holes (22) are further arranged on the battery module conveying mechanism (3).
8. The discharging device of the intermittent closed power lithium battery as claimed in claim 3, wherein the waste gas treatment device comprises an alkali liquor spray tower (10), an activated carbon adsorption tower (12) and a centrifugal fan (13) which are connected in sequence; and the air inlet end (20) of the alkali liquor spray tower (10) is connected with the exhaust port (16) of the closed discharge device (4), and the air outlet (21) of the centrifugal fan (13) is connected with the air inlet (19) arranged on the discharge port (7).
9. The discharging device of an intermittent closed power lithium battery as claimed in claim 8, further comprising an alkali liquor circulating pump (11), wherein the alkali liquor circulating pump (11) is connected with the alkali liquor spraying tower (10).
10. A discharge method using the discharge device according to any one of claims 1 to 9, comprising the steps of:
feeding: the charged battery module or the single battery cell completes charging through the battery module charging device (1);
discharging: the battery module feeding device (1) transports the charged battery module or single battery cell to the closed discharging device (4) to complete discharging;
blanking: the discharged battery module or single battery cell is fed into a warehouse shelf for storage through a battery module blanking device (8).
11. The discharging method of the intermittent closed power lithium battery as claimed in claim 10, further comprising blow-drying after discharging, that is, blow-drying the surface of the discharged battery module or single battery cell.
12. A method for discharging a lithium battery in an intermittent closed power as claimed in claim 10, further comprising an exhaust gas treatment step, wherein the exhaust gas generated in the discharging step enters the exhaust gas treatment unit through the closed discharging unit (4).
13. A method for discharging an intermittent type closed power lithium battery as claimed in claim 10, further comprising negative pressure induced air, i.e. providing negative pressure air flow to the closed discharging device (4) by using a negative pressure induced air device.
CN202110758822.6A 2021-07-05 2021-07-05 Discharging device and method for intermittent closed power lithium battery Pending CN113488712A (en)

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Cited By (2)

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Publication number Priority date Publication date Assignee Title
CN116073003A (en) * 2023-03-13 2023-05-05 广东金晟新能源股份有限公司 Residual electric quantity discharging device for ternary lithium battery single cell
DE102022204047A1 (en) 2022-04-27 2023-11-02 Robert Bosch Gesellschaft mit beschränkter Haftung Device for discharging battery units

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Application publication date: 20211008