High-temperature negative-pressure formation and constant-temperature capacity grading all-in-one machine equipment
By designing a high-temperature negative pressure synthesis and constant temperature capacitance integrated machine equipment, the complexity of temperature control and space occupation problems during the synthesis and capacitance are solved, and efficient temperature control and safety improvement are achieved.
Patent Information
- Application Number
- CN202422133432.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-09-02
- Publication Date
- 2025-07-01
- Estimated Expiration
- 2034-09-02
AI Technical Summary
In the existing lithium battery manufacturing technology, the process of decomposition and capacity separation requires different ambient temperatures, resulting in complex equipment, high cost and large area.
A high-temperature negative pressure shaping and constant temperature capacity distribution integrated machine equipment is designed, and the chemical storage and the capacity distribution library are heat-insulated and separated by the temperature control cabinet. A negative pressure shaping mechanism and a constant temperature capacity distribution mechanism are set up in the chemical storage and the capacity distribution library respectively, and the temperature control is achieved using a thermal fan and a high-temperature heating pipe.
It realizes efficient temperature control of the synthesis and capacity separation process, saves space, reduces equipment complexity and cost, and improves safety through emergency smoke exhaust devices.
Smart Images
Figure CN223052177U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the field of lithium battery manufacturing, and particularly relates to an integrated machine for high-temperature negative-pressure formation and constant-temperature grading and capacitance measurement. Background Art
[0002] The formation of a lithium battery is the first charging process of the battery after injection of electrolyte. This process can activate the active substances in the battery and activate the lithium battery. At the same time, a solid electrolyte interface (SEI) film is formed on the negative electrode side of the lithium battery, and this layer of film can prevent further side reactions from occurring, thereby reducing the loss of active lithium in the lithium battery. The quality of the SEI film has a great influence on the cycle life, initial capacity loss, rate performance, etc. of the lithium battery.
[0003] The formation temperature mainly affects the formation effect by influencing the viscosity and conductivity of the electrolyte and the ion diffusion rate of the electrode material. Generally, the higher the formation temperature, the lower the viscosity of the electrolyte, the higher the conductivity of the electrolyte, and the faster the ion diffusion rate of the electrode material. However, when the temperature is too high, the structure of the already formed SEI film will be damaged and its components will be changed; at the same time, the electrolyte is an organic solvent solution, and too high a temperature will cause the low-boiling components in the electrolyte to volatilize faster, affecting the formation effect. Therefore, the recommended formation temperature is RT~90°C; under the condition that laboratory conditions permit, high-temperature formation (45~70°C) can be used.
[0004] At present, the main form of high-temperature formation in the industry is to place the formation mechanism in a high-temperature oven or a constant-temperature oven.
[0005] The grading and capacitance measurement process of a lithium battery (i.e., analyzing the capacitance) is to charge and discharge the formed battery cells according to the design standard to measure the capacitance of the battery cells; during this process, the battery temperature will slowly rise, and at the same time, a large amount of heat will be released, which is prone to production accidents.
[0006] A relatively constant ambient temperature is required during the grading and capacitance measurement process. The temperature is mainly controlled by natural cooling, forced air cooling, and liquid cooling.
[0007] At present, the main cooling methods in the industry are forced air cooling or liquid cooling; for air cooling, multiple axial flow fans are mainly used to exchange the higher temperature inside the equipment with the workshop to achieve the purpose of cooling; liquid cooling is to place one or more water cooling devices near the equipment, and the air inside the equipment is exchanged with the water cooling devices through a fan to achieve the purpose of cooling.
[0008] The main defects are as follows: (1) Since the formation and grading and capacitance measurement require different ambient temperatures, it is necessary to design two cabinets to place the corresponding formation or grading and capacitance measurement mechanisms; (2) The two cabinets are limited by size or form and are not convenient to stack, resulting in a larger floor space; (3) The existing formation and grading and capacitance measurement temperature control devices are relatively complex and costly. Summary of the Utility Model
[0009] The purpose of the present utility model is to provide a high-temperature negative-pressure formation and constant-temperature grading and capacitance-measuring integrated machine equipment to solve the problems raised in the above-mentioned background technology.
[0010] To achieve the above purpose, the present utility model provides the following technical solutions:
[0011] A high-temperature negative-pressure formation and constant-temperature grading and capacitance-measuring integrated machine equipment includes: a temperature control cabinet, a negative-pressure formation mechanism, and a constant-temperature grading and capacitance-measuring mechanism; a heat insulation layer is provided inside the temperature control cabinet to divide the interior into a formation library and a grading and capacitance-measuring library; the negative-pressure formation mechanism is arranged in the formation library; the constant-temperature grading and capacitance-measuring mechanism is arranged in the grading and capacitance-measuring library; the temperature control cabinet is provided with a loading and unloading front door and a maintenance rear door for both the formation library and the grading and capacitance-measuring library; an explosion-proof observation window is provided on the loading and unloading front door; the temperature control cabinet is provided with a grading and capacitance-measuring temperature control device and a formation temperature control device;
[0012] The grading and capacitance-measuring temperature control device includes: a grading and capacitance-measuring temperature detection probe for detecting the temperature inside the grading and capacitance-measuring library and an industrial air conditioner that automatically adjusts the output power according to the temperature detected by the grading and capacitance-measuring temperature detection probe to keep the grading and capacitance-measuring temperature constant; the formation temperature control device includes: a heat conduction fan, a high-temperature heating tube, a formation temperature detection probe for detecting the temperature inside the formation library, a formation cooling port, a cooling port baffle, and a formation cylinder;
[0013] When the formation library needs to be heated, the cooling port baffle blocks the formation cooling port to close the formation cooling port, and the heat conduction fan extracts air from the formation library, heats the air through the high-temperature heating tube, and then transfers the air to the formation library; when the formation library needs to be cooled, the formation cylinder pushes the cooling port baffle to move to open the formation cooling port, the high-temperature heating tube stops working, and the heat conduction fan extracts external normal-temperature air from the formation cooling port and exchanges it with the air inside the formation library for cooling.
[0014] As a further scheme of the present utility model: a high-temperature negative-pressure formation and constant-temperature grading and capacitance-measuring integrated machine equipment is provided with an exhaust pipeline; both the formation library and the grading and capacitance-measuring library are respectively provided with an emergency smoke exhaust device for exhausting the smoke inside the library; the emergency smoke exhaust device includes: a smoke exhaust fan, a smoke exhaust port, a smoke exhaust port baffle, and a smoke exhaust cylinder; the smoke exhaust cylinder pushes the smoke exhaust port baffle to open or close the smoke exhaust port; when the smoke exhaust port is open, the smoke exhaust fan extracts air from the library through the smoke exhaust port and discharges it through the exhaust pipeline.
[0015] As a further scheme of the present utility model: the temperature control cabinet is provided with a control panel for both the formation library and the grading and capacitance-measuring library; the control panel, the industrial air conditioner, the heat conduction fan, and the high-temperature heating tube are all arranged at the side end of the temperature control cabinet.
[0016] As a further scheme of the present utility model: an audible and visual alarm light is provided on the top of the temperature control cabinet.
[0017] As a further solution of the utility model: a maintenance opening for high-temperature mechanism and an electrical wiring opening are provided on the back of the temperature control cabinet.
[0018] As a further solution of the utility model: the formation library and the grading library are arranged vertically one above the other.
[0019] Compared with the prior art, the beneficial effects of the utility model are as follows: the negative-pressure formation mechanism and the grading mechanism are placed together, saving space and facilitating operation by personnel. The grading temperature control device uses an industrial air conditioner to achieve constant-temperature control of the grading temperature. The formation temperature control device realizes the control of the formation temperature, rapidly raises the temperature by using air circulation, and cools down by introducing external air when cooling is required. The emergency smoke exhaust device is provided to rapidly exhaust smoke in case of emergencies such as battery smoking or catching fire, avoiding danger.
[0020] Other features and advantages of the utility model will be disclosed in detail in the following specific embodiments and the drawings. Description of the Drawings
[0021] Figure 1 is a perspective view of the front side of a high-temperature negative-pressure formation and constant-temperature grading integrated machine device of the utility model;
[0022] Figure 2 is Figure 1 a perspective view of the rear side of the high-temperature negative-pressure formation and constant-temperature grading integrated machine device in
[0023] Figure 3 is Figure 1 a schematic view of the front side of the high-temperature negative-pressure formation and constant-temperature grading integrated machine device in
[0024] Figure 4 is Figure 2 a schematic view of the rear side of the high-temperature negative-pressure formation and constant-temperature grading integrated machine device in
[0025] Figure 5 is Figure 4 a schematic view of the grading temperature control device of the high-temperature negative-pressure formation and constant-temperature grading integrated machine device in
[0026] Figure 6 is Figure 4 a schematic view of the formation temperature control device of the high-temperature negative-pressure formation and constant-temperature grading integrated machine device in
[0027] Figure 7 is Figure 6 a schematic view of the internal structure of the formation temperature control device in
[0028] List of reference numerals: temperature control cabinet 1, control panel 11, audible and visual alarm lamp 12, front loading and unloading door 13, explosion-proof observation window 131, formation temperature control device 14, industrial air conditioner 141, formation temperature detection probe 142, formation temperature control device 15, high-temperature heating tube 151, heat conduction fan 152, formation cooling port 153, formation cylinder 154, formation temperature detection probe 155, cooling port baffle 156, smoke exhaust pipeline 16, rear maintenance door 17, smoke exhaust fan 181, smoke exhaust cylinder 182, heat insulation layer 19, negative pressure formation mechanism 2, constant temperature formation and capacitance measurement mechanism 3. Detailed implementation manners
[0029] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.
[0030] Please refer to Figures 1 to 7 , a high-temperature negative pressure formation and constant temperature formation and capacitance measurement integrated machine device, comprising: a temperature control cabinet 1, a negative pressure formation mechanism 2, and a constant temperature formation and capacitance measurement mechanism 3. An insulation layer 19 is arranged in the temperature control cabinet 1 to divide the interior into a formation chamber and a formation and capacitance measurement chamber. Specifically, the insulation layer 19 is made of high-temperature resistant heat insulation cotton and cold-rolled iron sheets to achieve the heat insulation and heat preservation effect in the pigeon cavity. The negative pressure formation mechanism 2 is arranged in the formation chamber. The constant temperature formation and capacitance measurement mechanism 3 is arranged in the formation and capacitance measurement chamber. The walls of the formation chamber and the formation and capacitance measurement chamber are both filled with high-temperature resistant heat insulation cotton to optimize the heat preservation function of the chamber. The temperature control cabinet 1 is provided with a front loading and unloading door 13 and a rear maintenance door 17 for both the formation chamber and the formation and capacitance measurement chamber. An explosion-proof observation window 131 is arranged on the front loading and unloading door 13. Operators can observe the operation of the device through the explosion-proof observation window 131. The temperature control cabinet 1 is provided with a formation temperature control device 14 and a formation temperature control device 15.
[0031] The formation temperature control device 14 includes: a formation temperature detection probe 142 and an industrial air conditioner 141. The formation temperature detection probe 142 is used to detect the temperature in the formation and capacitance measurement chamber. The industrial air conditioner 141 automatically adjusts the output power according to the temperature detected by the formation temperature detection probe 142 to keep the formation temperature constant. The formation temperature control device 15 includes: a heat conduction fan 152, a high-temperature heating tube 151, a formation temperature detection probe 155, a formation cooling port 153, a cooling port baffle 156, and a formation cylinder 154. The formation temperature detection probe 155 is used to detect the temperature in the formation chamber. Specifically, one or several industrial air conditioners 141 can be set according to needs.
[0032] When the formation chamber needs to be heated, the cooling port baffle 156 blocks the formation cooling port 153 to close the formation cooling port 153, and the heat conduction fan 152 extracts air from the formation chamber, heats the air through the high-temperature heating pipe 151, and then transfers it into the formation chamber. When the formation chamber needs to be cooled, the formation cylinder 154 pushes the cooling port baffle 156 to move to open the formation cooling port 153, the high-temperature heating pipe 151 stops working, and the heat conduction fan 152 extracts external normal-temperature air from the formation cooling port 153 and exchanges it with the inside of the formation chamber for cooling.
[0033] Placing the negative-pressure formation mechanism and the grading mechanism together saves space and facilitates operation by personnel. The high-temperature environment corresponds to the negative-pressure formation mechanism, and the constant-temperature environment corresponds to the grading mechanism, which not only meets the experimental test requirements but also reduces production costs.
[0034] As a specific implementation manner, a high-temperature negative-pressure formation and constant-temperature grading integrated machine is provided with an exhaust pipeline 16. Both the formation chamber and the grading chamber are provided with emergency smoke exhaust devices. The emergency smoke exhaust device is used to exhaust the smoke in the chamber. The emergency smoke exhaust device includes: a smoke exhaust fan 181, a smoke exhaust port, a smoke exhaust port baffle, and a smoke exhaust cylinder 182. The smoke exhaust cylinder 182 pushes the smoke exhaust port baffle to open or close the smoke exhaust port. When the smoke exhaust port is open, the smoke exhaust fan 181 extracts air from the chamber through the smoke exhaust port and discharges it through the exhaust pipeline 16.
[0035] As a specific implementation manner, the temperature control cabinet 1 is provided with a control panel 11 for both the formation chamber and the grading chamber. The operator can control the start and stop of the equipment and adjust the chamber temperature through the control panel 11. The control panel 11, the industrial air conditioner 141, the heat conduction fan 152, and the high-temperature heating pipe 151 are all arranged at the side end of the temperature control cabinet 1.
[0036] As a specific implementation manner, an audible and visual alarm lamp 12 is provided at the top of the temperature control cabinet 1 for better human-machine interaction.
[0037] As a specific implementation manner, a high-temperature mechanism maintenance port and an electrical wiring port are provided on the back of the temperature control cabinet 1. The fire pipeline is introduced through the electrical wiring port.
[0038] As a specific implementation manner, the formation chamber and the grading chamber are arranged vertically.
[0039] For those skilled in the art, it is obvious that the present utility model is not limited to the details of the above-mentioned exemplary embodiments, and the present utility model can be implemented in other specific forms without departing from the spirit or basic characteristics of the present utility model. Therefore, from any point of view, the embodiments should be regarded as exemplary and non-limiting. The scope of the present utility model is defined by the appended claims rather than the above description. Therefore, all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be embraced within the present utility model. Any reference signs in the claims should not be construed as limiting the claims involved.
[0040] In addition, it should be understood that although this specification is described according to embodiments, not every embodiment only contains an independent technical solution. This narrative way of the specification is only for clarity. Those skilled in the art should regard the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.
Claims
1. A high-temperature negative pressure formation and constant temperature volume separation integrated machine, characterized in that: include: A temperature control cabinet (1), a negative pressure formation mechanism (2) and a constant temperature volume separation mechanism (3); a heat insulation layer (19) is arranged inside the temperature control cabinet (1) to divide the interior into a formation warehouse and a volume separation warehouse; the negative pressure formation mechanism (2) is arranged in the formation warehouse; the constant temperature volume separation mechanism (3) is arranged in the volume separation warehouse; the temperature control cabinet (1) is provided with a loading and unloading front door (13) and an inspection rear door (17) for both the formation warehouse and the volume separation warehouse; the loading and unloading front door (13) is provided with an explosion-proof observation window (131); the temperature control cabinet (1) is provided with a volume separation temperature control device (14) and a formation temperature control device (15); The volume separation temperature control device (14) comprises: a volume separation temperature detection probe (142) for detecting the temperature in the volume separation reservoir, and an industrial air conditioner (141) that automatically adjusts the output power according to the temperature detected by the volume separation temperature detection probe (142) to achieve constant volume separation temperature; The formation temperature control device (15) comprises: a heat conduction fan (152), a high-temperature heating pipe (151), a formation temperature detection probe (155) for detecting the temperature in the formation reservoir, a formation cooling port (153), a cooling port baffle (156), and a formation cylinder (154); When the formation storehouse needs to be heated, the cooling port baffle (156) blocks the formation cooling port (153) to close the formation cooling port (153), and the heat-conducting blower (152) draws air from the formation storehouse, heats the air through the high-temperature heating tube (151), and then transfers the air to the formation storehouse; when the formation storehouse needs to be cooled, the formation cylinder (154) pushes the cooling port baffle (156) to move to open the formation cooling port (153), the high-temperature heating tube (151) stops working, and the heat-conducting blower (152) draws external normal-temperature air from the formation cooling port (153) to alternately cool the inside of the formation storehouse.
2. The high temperature negative pressure forming and constant temperature volume separation integrated device according to claim 1, characterized in that: The high-temperature negative pressure formation and constant temperature volume separation integrated device is provided with a smoke exhaust pipeline (16); the formation warehouse and the volume separation warehouse are both provided with emergency smoke exhaust devices for exhausting smoke in the warehouse; the emergency smoke exhaust device comprises: a smoke exhaust fan (181), a smoke exhaust port, a smoke exhaust port baffle and a smoke exhaust cylinder (182); the smoke exhaust cylinder (182) pushes the smoke exhaust port baffle to open or close the smoke exhaust port; when the smoke exhaust port is opened, the smoke exhaust fan (181) draws air from the warehouse through the smoke exhaust port and discharges it through the smoke exhaust pipeline (16).
3. The high temperature negative pressure forming and constant temperature volume separation integrated device according to claim 1, characterized in that: The temperature control cabinet (1) is provided with a control panel (11) for both the formation warehouse and the volume separation warehouse; the control panel (11), the industrial air conditioner (141), the heat transfer fan (152) and the high-temperature heating pipe (151) are all arranged at a side end of the temperature control cabinet (1).
4. The high temperature negative pressure forming and constant temperature volume separation integrated device according to claim 1, characterized in that: An audible and visual alarm lamp (12) is provided on the top of the temperature control cabinet (1).
5. The high temperature negative pressure forming and constant temperature volume separation integrated device according to claim 1, characterized in that: The back of the temperature control cabinet (1) is provided with a high-temperature mechanism inspection port and an electrical wiring port.
6. The high-temperature negative pressure forming and constant temperature volume separation integrated device according to claim 1, characterized in that: The formation library and the volume separation library are arranged vertically.