Double circulation system lithium battery constant temperature formation and component equipment

Abstract

The utility model discloses a kind of double circulation system lithium battery constant-temperature formation component equipment, aging box top is upper layer temperature control system, aging box bottom is lower layer temperature control system, upper layer water inlet on the upper layer temperature control system is connected with upper layer water outlet connector on water route system by upper layer water inlet pipe, upper layer water outlet on the upper layer temperature control system is connected with upper layer water outlet connector on water route system by upper layer water outlet pipe, lower layer water inlet on the lower layer temperature control system is docked with lower layer water inlet connector, lower layer water outlet is docked with lower layer water outlet connector. By setting lower layer temperature control system and upper layer temperature control system on the upper and lower sides, the temperature control of the oven inner cavity is realized, the precision of the oven inner cavity temperature control is improved, the lithium battery performance test is more refined, and the size of the uniform temperature control area can be realized, and then the volume is enlarged, to adapt to the trend development of "large battery" and "large current" era.

Description

Technical Field

[0001] This utility model relates to the field of lithium battery technology, specifically to a constant temperature formation and capacity testing device for a dual-cycle lithium battery system. Background Technology

[0002] With societal development, the field of new energy has become more comprehensive. Lithium batteries are a core component in areas such as mobile terminals, electrified transportation, and energy storage systems. The use of high-current lithium batteries is also increasing. The performance of lithium batteries significantly impacts user experience, lifespan, and safety, making performance testing crucial. Battery formation and capacity testing is a vital step in lithium battery manufacturing, and temperature-controlled formation and capacity testing equipment plays a critical role. During this process, the performance of the lithium battery demands high precision from the equipment. As the battery current increases, the heat generation rate rises sharply, requiring stricter temperature control. The stability of the operating environment temperature significantly affects the stability and reliability of the operation.

[0003] The main drawback is that existing lithium battery constant-temperature formation and capacity testing equipment on the market is mainly designed for batteries with low current and low heat generation. It uses a heating and cooling system for constant temperature control, which is relatively effective. However, with the rapid development of batteries, the current is increasing, and the heat generation is also increasing. Due to the large space of the constant-temperature chamber, using this method for temperature control will result in low overall temperature uniformity, low efficiency in reaching the set temperature, and the constant-temperature environment will affect the battery performance. Utility Model Content

[0004] The purpose of this invention is to provide a constant-temperature formation and capacity testing device for lithium batteries with a dual-cycle system, so as to solve the above-mentioned shortcomings in the prior art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a dual-cycle system lithium battery constant temperature formation and capacity testing device, comprising: a frame, wherein an aging chamber and a water system are arranged sequentially from top to bottom within the frame; the top of the aging chamber is an upper temperature control system, and the bottom of the aging chamber is a lower temperature control system; an oven cavity is located between the lower and upper temperature control systems; an upper water inlet on the upper temperature control system is connected to an upper water outlet on the water system via an upper water inlet pipe; a lower water outlet on the upper temperature control system is connected to an upper water outlet on the water system via an upper water outlet pipe; a lower water inlet on the lower temperature control system is connected to a lower water inlet; a lower water outlet is connected to a lower water outlet; and condensate from both the lower and upper temperature control systems is connected to a main condensate drain on the water system via a condensate drain pipe.

[0006] Furthermore, the water system includes a main inlet and a main outlet. A solenoid valve is installed on the pipeline corresponding to the main inlet. The outlet of the solenoid valve is connected to the upper inlet and the main outlet respectively through a three-way connector. A water flow sensor, a lower inlet, a lower outlet, and a check valve are sequentially installed between the three-way connector and the main outlet.

[0007] Furthermore, the upper temperature control system includes a second centrifugal fan with its air outlet facing downwards, a second axial fan is provided on one side of the second centrifugal fan, a second heating tube is provided between the second axial fan and the second centrifugal fan, a second microchannel evaporator is provided on the side of the second axial fan away from the second heating tube, and the upper water inlet and upper water outlet are located on the second microchannel evaporator.

[0008] Furthermore, the lower-level temperature control system includes a first centrifugal fan with its air outlet facing upwards, a first axial fan arranged on the side of the first centrifugal fan, a first heating tube arranged between the first centrifugal fan and the first axial fan, a first microchannel evaporator arranged on the side of the first axial fan away from the first heating tube, and the lower-level water inlet and lower-level water outlet located on the first microchannel evaporator.

[0009] Furthermore, a lower-level condensate outlet is provided on the outer side of the lowest point inside the outer frame of the lower-level temperature control system, and an upper-level condensate outlet is provided on the outer side of the lowest point inside the outer frame of the upper-level temperature control system. Both the lower-level and upper-level condensate outlets are connected to condensate pipes.

[0010] Furthermore, a tee is connected to the pipe on the side of the lower water inlet connection away from the water flow sensor, which is respectively connected to the pipe where the lower water outlet connection is located and the water temperature sensor.

[0011] The beneficial effects of the dual-cycle system lithium battery constant temperature formation and capacity testing equipment provided by this utility model in the above technical solution are as follows:

[0012] This invention achieves temperature control of the oven cavity by setting a lower temperature control system and an upper temperature control system on the upper and lower sides, thereby improving the accuracy of temperature control within the oven cavity, making lithium battery performance testing more refined, and increasing the size of the area that can achieve uniform temperature control, thus expanding the volume and adapting to the trend of "large battery" and "high current" era.

[0013] It should be understood that the foregoing general description and the following detailed description are exemplary and illustrative only, and are not intended to limit this disclosure.

[0014] This application provides an overview of various implementations or examples of the technology described in this disclosure, and is not a full disclosure of the entire scope or all features of the disclosed technology. Attached Figure Description

[0015] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in this utility model. For those skilled in the art, other drawings can be obtained based on these drawings.

[0016] Figure 1 A structural schematic diagram provided for an embodiment of this utility model;

[0017] Figure 2 A schematic diagram of the front internal structure provided for an embodiment of this utility model;

[0018] Figure 3 A schematic diagram of the internal structure of the back side provided for an embodiment of this utility model;

[0019] Figure 4 A schematic diagram of the internal structure of the side provided in an embodiment of this utility model;

[0020] Figure 5 A schematic diagram of the aging chamber structure provided for an embodiment of this utility model;

[0021] Figure 6 A schematic diagram of the lower-level temperature control system provided in this embodiment of the utility model;

[0022] Figure 7 A schematic diagram of the upper temperature control system provided in this embodiment of the utility model;

[0023] Figure 8 An airflow direction diagram of the aging chamber provided for an embodiment of this utility model;

[0024] Figure 9 This is a schematic diagram of the water system structure provided in an embodiment of the present utility model;

[0025] Figure 10 A schematic diagram showing the connection between the aging chamber and the drive board provided in this embodiment of the utility model;

[0026] Figure 11 Provided for the embodiments of this utility model Figure 3 Enlarged view of point A in the middle.

[0027] Explanation of reference numerals in the attached figures:

[0028] 1. Overall frame; 11. Front and rear adapter plates; 2. Aging module; 21. Operation panel; 22. Aging chamber; 221. Lower temperature control system; 2211. First centrifugal fan; 2212. First heating element; 2213. First axial fan; 2214. First microchannel evaporator; 2215. Lower water inlet; 2216. Lower water outlet; 2217. Lower condensate outlet; 222. Oven cavity; 2221. Aging plate assembly; 2222. Battery; 2223. Battery clip; 223. Upper temperature control system; 2231. Second centrifugal fan; 2232. Second heating element; 2233. Second axial fan; 2234. Second microchannel evaporator; 2235. Upper water inlet; 2236. Upper water outlet; 2237. Upper condensate outlet; 23. Temperature detection channel; 24. Condensate pipe; 25. Upper-level water outlet pipe; 26. Upper-level water inlet pipe; 27. Water system; 271. Main condensate drain outlet; 272. Main water inlet; 273. Upper-level water inlet connection; 2731. Upper-level water outlet connection; 274. Main water outlet; 275. Check valve; 276. Water temperature sensor; 277. Water flow sensor; 278. Solenoid valve; 279. Lower-level water inlet connection; 2791. Lower-level water outlet connection; 28. Insulation cotton; 3. Drive module; 31. Overall control module; 32. Left and right cooling fans of drive box; 321. Rear cooling fan of drive box; 33. Fan dustproof net; 34. Fire protection adapter plate; 35. Auxiliary power supply; 36. Switch; 37. Main control board; 38. Drive board assembly; 381. Drive board; 3811. Data acquisition module; 39. Inverter assembly. Detailed Implementation

[0029] To make the objectives, technical solutions, and advantages of the embodiments of this disclosure clearer, the technical solutions of the embodiments of this disclosure will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this disclosure. All other embodiments obtained by those skilled in the art based on the described embodiments of this disclosure without creative effort are within the scope of protection of this disclosure.

[0030] Please see Figures 1-11A constant-temperature formation and capacity testing device for a dual-cycle battery 2222 includes: a frame 1, within which an aging chamber 22 and a water system 27 are arranged sequentially from top to bottom. The top of the aging chamber 22 is an upper temperature control system 223, and the bottom of the aging chamber 22 is a lower temperature control system 221. An oven cavity 222 is located between the lower temperature control system 221 and the upper temperature control system 223. An upper water inlet 2235 on the upper temperature control system 223 is connected to an upper water outlet 2731 on the water system 27 via an upper water inlet pipe 26. A lower water outlet 2216 on the upper temperature control system 223 is connected to the upper water outlet 2731 on the water system 27 via an upper water outlet pipe 25. The lower temperature control system 222... The lower inlet 2215 of the aging chamber 22 is connected to the lower inlet connection 279, and the lower outlet 2216 is connected to the lower outlet connection 2791. The condensate from the lower temperature control system 221 and the upper temperature control system 223 is connected to the main condensate drain 271 of the water system 27 through the condensate pipe 24. The condensate pipe 24, the upper outlet pipe 25, and the upper inlet pipe 26 are all arranged on the back of the aging chamber 22. The water system 27 includes a main inlet 272 and a main outlet 274. A solenoid valve 278 is installed on the pipe corresponding to the main inlet 272. The outlet end of the solenoid valve 278 is connected to the upper inlet connection 273 and the main outlet 274 through a three-way connector. Between the three-way connector and the main outlet 274, there are sequentially arranged... The system includes a water flow sensor 277, a lower water inlet 279, a lower water outlet 2791, and a check valve 275. The check valve 275 is connected to the upper water outlet pipe 25. Here, the upper water outlet 2731 is the inlet of the check valve 275. The upper temperature control system 223 includes a second centrifugal fan 2231 with its outlet facing downwards. A second axial flow fan 2233 is located on one side of the second centrifugal fan 2231. A second heating element 2232 is located between the second axial flow fan 2233 and the second centrifugal fan 2231. A second microchannel evaporator 2234 is located on the side of the second axial flow fan 2233 away from the second heating element 2232. The upper water inlet 2235 and the upper water outlet 2236 are located on the second microchannel evaporator. 2234 The lower-level temperature control system 221 includes a first centrifugal fan 2211 with its air outlet facing upwards. A first axial fan 2213 is arranged on the side of the first centrifugal fan 2211. A first heating element 2212 is arranged between the first centrifugal fan 2211 and the first axial fan 2213. A first microchannel evaporator 2214 is arranged on the side of the first axial fan 2213 away from the first heating element 2212. A lower-level water inlet 2215 and a lower-level water outlet 2216 are located on the first microchannel evaporator 2214. A lower-level condensate water outlet 2217 is arranged on the outer side of the lowest point inside the outer frame of the lower-level temperature control system 221. An upper-level condensate water outlet 2237 is arranged on the outer side of the lowest point inside the outer frame of the upper-level temperature control system 223.Both the lower condensate outlet 2217 and the upper condensate outlet 2237 are connected to the condensate pipe 24. A tee is connected to the pipe on the side of the lower inlet connection 279 furthest from the flow sensor 277, connecting it to the pipe containing the lower outlet connection 2791 and the water temperature sensor 276.

[0031] Specifically, the main condensate drain outlet 271 is connected to the factory drain pipe, the main inlet 272 is connected to the factory cold water outlet pipe, and the main outlet 274 is connected to the factory cold water inlet pipe. Cold water enters through the main inlet 272 and passes sequentially through the solenoid valve 278, the upper inlet connection 273, the upper inlet pipe 26, the upper inlet 2235, the second microchannel evaporator 2234, the upper outlet 2236, the upper outlet pipe 25, the check valve 275, and the main outlet 274 to complete the water circulation of the upper temperature control system 223. Cold water passes through the main inlet 272, the water flow sensor 277, the lower inlet connection 279, the lower inlet 2215, the first microchannel evaporator 2214, the lower outlet 2216, the lower outlet connection 2791, the check valve 275, and the main outlet 274 to complete the water circulation of the lower temperature control system 221.

[0032] In this utility model, such as Figure 1 The entire machine consists of three parts: the frame 1, the aging module 2, and the drive module 3. The aging module 2 and the drive module 3 are located at the front and rear, respectively.

[0033] like Figure 2 The aging module 2 has an operation panel 21 on its lower left side, which includes a leakage current protector, start / stop buttons, and a temperature control switch. Inside is the aging chamber 22, which is lined with insulation cotton 28 on its left, right, and rear sides to effectively prevent heat transfer, reduce heat loss, and ensure temperature stability within the chamber. A temperature detection channel 23 is also located on the left side of the aging chamber 22, allowing inspectors to check if the internal temperature matches the set value, ensuring accurate equipment operation. The drive module 3 has a control module 31 on its lower left side, protecting the equipment, ensuring the safe operation of the power system, and improving the efficiency and performance of the power equipment. Both sides have left and right cooling fan units 32, with airflow directed towards the inner drive plate 381 and then drawn outwards by the rear cooling fan unit 321, dissipating heat from the entire drive module 3.

[0034] like Figure 3 The aging module 2 has a condensate pipe 24 on its right side, which connects the lower temperature control system 221 and the upper temperature control system 223 to the condensate. The bottom of the aging chamber 22 has a water system 27, which controls the water circulation of the entire temperature control system. The drive module 3 has a whole machine control module 31 on its lower right side, which controls the solenoid valve 278 and the start and stop of the heating element to regulate the temperature of the aging chamber 22, and provides fault alarms, fire alarms, etc.

[0035] like Figure 4 The top of the drive module 3 is equipped with a fire alarm adapter plate 34, where the fire protection lines in the factory are connected. In the event of a fire or other fire-related problem, the fire control center in the factory can receive an alarm notification, ensuring the safety of the factory and personnel. A switch 36 allows multiple devices to communicate and be managed centrally. Dust filters 33 are installed on both sides of the drive module to prevent dust from entering the drive box and affecting the equipment's accuracy and lifespan. Inside the drive module 3 is the core drive box, containing the drive board assembly 38, the main control board 37, the auxiliary power supply 35, and the inverter assembly 39. These components together form the drive module 3 for battery 2222 testing, performing performance tests on the battery 2222. The inverter assembly 39 feeds excess power from charging and discharging back into the national grid, saving energy, reducing consumption, and improving the stability of the power system.

[0036] like Figure 5 The diagram shows the aging chamber 22. The middle part is the inner cavity 222 of the oven, where the aging board assembly 2221 is placed. The upper layer is equipped with an upper temperature control system 223, and the lower layer is equipped with a lower temperature control system 221. The two systems drive the upper and lower layers simultaneously to regulate the temperature of the oven. The temperature control is precise, the temperature uniformity is good, and the efficiency is high.

[0037] like Figure 6 The lower temperature control system 221 contains a first centrifugal fan 2211 with its outlet facing upwards, which circulates airflow inside the oven. A first heating element 2212 is activated during heating to heat the air. During cooling, a first axial fan 2213 blows the cold air generated by the first microchannel evaporator 2214 above the first centrifugal fan 2211, which then delivers the cold air to the oven. The lower condensate outlet 2217 collects the condensate produced by the first microchannel evaporator 2214 and connects it to a tee on the main condensate drain outlet 271 via a condensate pipe 24 for unified drainage.

[0038] like Figure 7 The upper temperature control system 223 operates on the same principle as the lower temperature control system 221, except that the outlet of the second centrifugal fan 2231 is directed downwards to circulate the airflow inside the oven. The second heating element 2232 needs to be turned on to heat the air during heating. During cooling, the second axial fan 2233 blows the cold air generated by the second microchannel evaporator 2234 above the second centrifugal fan 2231, which then delivers the cold air to the oven.

[0039] like Figure 8 The airflow inside the aging chamber 22 is in two cycles, one up and one down, which enables more efficient and precise temperature control.

[0040] like Figure 9The water system 27 is equipped with a main condensate drain outlet 271 connected to the plant drain pipe to discharge condensate. The main inlet 272 connects to the plant's chilled water outlet pipe; the main outlet 274 connects to the plant's chilled water inlet pipe. The upper inlet connection 273 connects to the upper temperature control system 223's inlet pipe via the upper inlet pipe 26. A check valve 275 connects to the upper temperature control system 223's outlet pipe via the upper outlet pipe 25 to prevent backflow into the evaporator. A water temperature sensor 276 detects whether the chilled water temperature meets requirements, and a water flow sensor 277 detects whether the water flow rate is normal. If the requirements are not met, an alarm can be triggered by the overall control module 31 and sent to the host computer. A solenoid valve 278 controls the cooling water supply; it opens during cooling and closes during heating.

[0041] like Figure 10 The connection method between the aging board assembly 2221 and the drive board 381 is as follows: the aging board assembly 2221 is equipped with battery clips 2223 to hold the positive and negative terminals of the battery 2222. The positive and negative terminals are integrated to the gold fingers at the front end through the circuit board underneath. Then, the front and rear adapter boards 11 are equipped with corresponding gold finger sockets to connect the aging board assembly 2221 and the drive board 381 for communication. The acquisition module 3811 is integrated on the drive board 381. Each battery 2222 corresponds to one acquisition board to perform performance testing on each battery 2222.

[0042] The foregoing description only illustrates certain exemplary embodiments of the present invention. Undoubtedly, those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the above drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. A constant-temperature formation and capacity testing device for a dual-cycle lithium battery system, comprising: The frame (1) of the machine is characterized in that: an aging chamber (22) and a water system (27) are arranged sequentially from top to bottom inside the frame (1). The top of the aging chamber (22) is an upper temperature control system (223), and the bottom of the aging chamber (22) is a lower temperature control system (221). The cavity between the lower temperature control system (221) and the upper temperature control system (223) is the oven cavity (222). The upper water inlet (2235) provided on the upper temperature control system (223) is connected to the upper water outlet (2731) provided on the water system (27) through the upper water inlet pipe (26). The lower outlet (2216) of the upper temperature control system (223) is connected to the upper outlet connection (2731) of the water system (27) through the upper outlet pipe (25). The lower inlet (2215) of the lower temperature control system (221) is connected to the lower inlet connection (279). The lower outlet (2216) is connected to the lower outlet connection (2791). The condensate from the lower temperature control system (221) and the upper temperature control system (223) is connected to the main condensate drain (271) of the water system (27) through the condensate pipe (24).

2. The constant-temperature formation and capacity testing equipment for a dual-cycle lithium battery system according to claim 1, characterized in that, The water system (27) includes a main inlet (272) and a main outlet (274). A solenoid valve (278) is installed on the pipeline corresponding to the main inlet (272). The outlet end of the solenoid valve (278) is connected to the upper inlet connection (273) and the main outlet (274) respectively through a three-way connector. A water flow sensor (277), a lower inlet connection (279), a lower outlet connection (2791), and a check valve (275) are installed sequentially between the three-way connector and the main outlet (274).

3. The constant-temperature formation and capacity testing equipment for a dual-cycle lithium battery system according to claim 1, characterized in that, The upper temperature control system (223) includes a second centrifugal fan (2231) with the air outlet facing downward. A second axial fan (2233) is provided on one side of the second centrifugal fan (2231). A second heating tube (2232) is provided between the second axial fan (2233) and the second centrifugal fan (2231). A second microchannel evaporator (2234) is provided on the side of the second axial fan (2233) away from the second heating tube (2232). The upper water inlet (2235) and the upper water outlet (2236) are located on the second microchannel evaporator (2234).

4. The constant-temperature formation and capacity testing equipment for a dual-cycle lithium battery system according to claim 1, characterized in that, The lower temperature control system (221) includes a first centrifugal fan (2211) with the air outlet facing upward, a first axial fan (2213) is provided on the side of the first centrifugal fan (2211), a first heating tube (2212) is provided between the first centrifugal fan (2211) and the first axial fan (2213), a first microchannel evaporator (2214) is provided on the side of the first axial fan (2213) away from the first heating tube (2212), and the lower water inlet (2215) and the lower water outlet (2216) are located on the first microchannel evaporator (2214).

5. The constant-temperature formation and capacity testing equipment for a dual-cycle lithium battery system according to claim 1, characterized in that, The lower temperature control system (221) has a lower condensate outlet (2217) located on the outer side of the lowest point inside the outer frame, and the upper temperature control system (223) has an upper condensate outlet (2237) located on the outer side of the lowest point inside the outer frame. Both the lower condensate outlet (2217) and the upper condensate outlet (2237) are connected to the condensate pipe (24).

6. The constant-temperature formation and capacity testing equipment for a dual-cycle lithium battery according to claim 2, characterized in that, The lower water inlet (279) is connected to a tee on the side of the pipe away from the water flow sensor (277), which is connected to the pipe where the lower water outlet (2791) is located and the water temperature sensor (276).

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