Negative pressure cup and formation equipment

CN224696790UActive Publication Date: 2026-08-28CALB GROUP CO LTD
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Patent Information

Application Number
CN202521940769.1
Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
Filing Date
2025-09-09
Publication Date
2026-08-28
Estimated Expiration
2035-09-09

AI Technical Summary

Technical Problem

但是，在负压系统应用过程中，负压状态不仅能使气体排出电池单体，排出气体的同时还会将电解液同步带出，造成电解液损失，经统计分析，每个电池单体的电解液损失约2g-10g

Benefits of technology

[0011]本实用新型的负压杯包括设置有进气口和出气口的杯主体；进气口和出气口之间设置有功能隔板，功能隔板设置气液分离部。当气液混合物通过进气口进入杯主体内，并沿由第一腔向第二腔的气体流通方向流动时，气液分离部能用于实现气液分离，分离后的气体可以进一步通过出气口流出负压杯。同时，功能隔板上还设置有保险阀，保险阀用于在气液分离部发生堵塞失效，且第一腔的压力和第二腔的压力的差值大于等于预设压力差值时打开，以对进气口侧的气体快速释放，可以有效地避免进气口侧因为气体聚集无法排出而导致的安全风险。综上，负压杯具有气液分离功能，且安全性更高。

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Abstract

The utility model relates to battery manufacturing technical field discloses a negative pressure cup and formation equipment. Wherein the negative pressure cup includes cup main body and function partition, cup main body is provided with the air inlet and air outlet that intercommunication, function partition divides cup main body into the first chamber that communicates with air inlet and the second chamber that communicates with air outlet, sets up gas -liquid separation part and safety valve on function partition, gas -liquid separation part is used for gas -liquid separation, safety valve is used for when the difference of the pressure of first chamber and the pressure of second chamber is greater than or equal to preset pressure difference, the air inlet and air outlet are connected. The utility model discloses a negative pressure cup, higher safety is realized simultaneously with gas -liquid separation, and the formation equipment of setting up above negative pressure cup is less in electrolyte loss in the formation process, and safety is also higher.
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Claims

1. A negative pressure cup, characterized in that, include: The cup body (100) is provided with an air inlet (110) and an air outlet (120) that are connected to each other; A functional partition (200) divides the cup body (100) into a first chamber (101) communicating with the air inlet (110) and a second chamber (102) communicating with the air outlet (120). A gas-liquid separation section (210) and a safety valve (300) are provided on the functional partition (200). The gas-liquid separation section (210) is used for gas-liquid separation. The safety valve (300) is used to connect the air inlet (110) and the air outlet (120) when the pressure difference between the first chamber (101) and the second chamber (102) is greater than or equal to a preset pressure difference.

2. The negative pressure cup according to claim 1, characterized in that, The functional partition (200) is provided with a valve mounting hole (220). The safety valve (300) includes a valve seat (310) and a valve core (320). The valve seat (310) is provided in the valve mounting hole (220). The valve seat (310) is provided with a cavity (301) and a first opening (312) and a second opening (311) communicating with the cavity (301). The first opening (312) communicates with the first cavity (101), and the second opening (311) communicates with the second cavity (102). The valve core (320) is provided in the cavity (301) and has an initial position that disconnects the communication between the first opening (312) and the second opening (311) and a working position that connects the first opening (312) and the second opening (311). The valve core (320) can switch from the initial position to the working position under pressure.

3. The negative pressure cup according to claim 2, characterized in that, The safety valve (300) is also provided with a stop ring (340), which is disposed in the first opening (312), and the inner diameter of the stop ring (340) is smaller than the inner diameter of the first opening (312).

4. The negative pressure cup according to claim 2, characterized in that, The safety valve (300) is provided with a reset member (330), one end of which is connected to the valve core (320) and the other end is connected to the valve seat (310), for making the valve core (320) tend to switch to the initial position.

5. The negative pressure cup according to claim 4, characterized in that, The reset element (330) is configured as a spring, one end of which is connected to the valve core (320) and the other end is connected to the valve seat (310).

6. The negative pressure cup according to claim 2, characterized in that, The area of ​​the first opening (312) is greater than or equal to 1 / 6 of the area of ​​the gas-liquid separation section (210) and less than or equal to 1 / 2 of the area of ​​the gas-liquid separation section (210).

7. The negative pressure cup according to claim 2, characterized in that, The valve core (320) in the initial position is located between the first opening (312) and the second opening (311) to disconnect the first opening (312) and the second opening (311); The valve core (320) in the initial position can block the second opening (311) to disconnect the first opening (312) and the second opening (311).

8. The negative pressure cup according to claim 7, characterized in that, Multiple second openings (311) are provided, and the multiple second openings (311) are spaced apart.

9. The negative pressure cup according to claim 8, characterized in that, A plurality of the second openings (311) are spaced apart circumferentially and / or axially around the valve seat (310).

10. The negative pressure cup according to claim 8, characterized in that, The areas of the multiple second openings (311) are equal.

11. The negative pressure cup according to claim 8, characterized in that, The areas of the multiple second openings (311) are not equal.

12. The negative pressure cup according to claim 8, characterized in that, The sum of the areas of the plurality of second openings (311) is greater than or equal to 1 / 6 of the area of ​​the gas-liquid separation section (210) and less than or equal to 1 / 2 of the area of ​​the gas-liquid separation section (210).

13. The negative pressure cup according to any one of claims 2-12, characterized in that, The valve seat (310) is located on the side of the functional partition (200) near the air outlet (120).

14. The negative pressure cup according to any one of claims 2-12, characterized in that, The valve seat (310) is integrally or detachably connected to the functional partition (200).

15. The negative pressure cup according to any one of claims 2-12, characterized in that, The valve mounting hole (220) and the gas-liquid separation section (210) are spaced apart by a distance H in mm, where H ≥ 5.

16. The negative pressure cup according to claim 1, characterized in that, The preset pressure difference is set to be greater than or equal to 10 kPa and less than or equal to 80 kPa.

17. The negative pressure cup according to claim 1, characterized in that, The gas-liquid separation unit (210) is configured as a gas-liquid separation membrane.

18. The negative pressure cup according to claim 1, characterized in that, The cup body (100) includes an upper cover (130) and a lower shell (140), the air inlet (110) is disposed in the lower shell (140), the air outlet (120) is disposed in the upper cover (130), and the functional partition (200) is detachably disposed between the upper cover (130) and the lower shell (140).

19. A chemical formation device, characterized in that, It includes a negative pressure device and a negative pressure cup as described in any one of claims 1-18, wherein the air inlet (110) of the negative pressure cup is connected to the liquid injection hole of the battery cell, and the air outlet (120) of the negative pressure cup is connected to the negative pressure device.