Formation liquid loss prevention device and formation liquid loss prevention system for battery

Abstract

The utility model discloses a formation liquid loss prevention device which comprises a device body, a containing cavity, an output end and an input end used for being communicated with a transparent formation cup are arranged in the device body, a buffer flow channel is formed in the containing cavity, and the output end and the input end are both communicated with the containing cavity. Meanwhile, the utility model further discloses a formation liquid loss prevention system for the battery using the formation liquid loss prevention device, the problem of electrolyte loss in the formation technological process is more effectively solved, and the undesirable phenomenon that interface black spots appear due to the fact that the pressure value is too low is avoided.

Description

Technical Field

[0001] The utility model relates to the field of batteries, in particular to a formation liquid loss prevention device and a formation liquid loss prevention system for batteries. Background Art

[0002] Formation is a key process in the production of lithium-ion batteries and an important guarantee for obtaining lithium-ion batteries with good electrochemical properties and safety performance. The applicant disclosed a device and a formation method for improving the battery liquid loss with authorization announcement number CN112713367B on March 31, 2023 for the battery formation process. The existing device for improving the battery liquid loss includes a transparent formation cup and a vacuum pump connected to the transparent formation cup. During the formation process, the transparent formation cup is connected to the injection hole of the battery, the electrolyte in the battery enters the transparent formation cup, and the liquid level in the transparent formation cup is observed; the transparent formation cup is provided with a liquid level sensor, which is used to detect the liquid level height in the transparent formation cup. The existing device for improving the battery liquid loss also includes a controller electrically connected to the liquid level sensor, and the controller is also electrically connected to the battery and the vacuum pump independently. The controller is used to receive the feedback signal sent by the liquid level sensor, and feedback control the vacuum degree of the vacuum pump, as well as the adjustment of the battery formation parameters, so as to avoid the electrolyte in the transparent formation cup from flowing out, and can observe the gas production at each stage of formation, further optimize the liquid loss and improve the formation, and has the characteristics of simple structure and easy operation.

[0003] The applicant discovered during long-term use and research and development that when the vacuum pump is under negative pressure, the electrolyte inside the battery will be extracted. Excessive liquid loss will cause a poor battery interface and damage the vacuum proportional valve of the equipment, which will eventually lead to failure of the vacuum regulation.

[0004] There are two existing treatment methods: the first is to increase the capacity of the transparent formation cup, and the second is to reduce the vacuum pressure value of the existing vacuum pump. However, the first method is that the formation cup will overflow directly after it is full, or the electrolyte will evaporate into a gaseous state at high temperature under negative pressure, overflow from the gaseous state into the waste liquid barrel, and then cool into a liquid state, and finally output to the waste liquid barrel. In this way, the electrolyte that flows into the waste liquid barrel will not be able to flow back into the battery, which will still cause a large amount of liquid loss. The second method is to reduce the vacuum pressure value of the existing vacuum pump. The gas from the chemical reaction inside the battery cannot be completely eliminated, which will cause defects such as black spots on the interface. Utility Model Content

[0005] In order to overcome at least one defect of the above-mentioned prior art, the utility model provides a formation liquid loss prevention device and a battery formation liquid loss prevention system, which more effectively solves the problem of electrolyte loss during the formation process and avoids the undesirable phenomenon of interface black spots caused by too low pressure value.

[0006] The technical solution adopted by the utility model to solve the problem is:

[0007] A formation liquid loss prevention device, comprising:

[0008] The device body is provided with a accommodating chamber, an output end and an input end for connecting to a transparent formation cup, a buffer flow channel is formed inside the accommodating chamber, the output end and the input end are both connected to the accommodating chamber, and the buffer flow channel is used to block and store electrolyte.

[0009] The utility model also discloses a battery formation liquid loss prevention system, comprising:

[0010] The above-mentioned formation and liquid loss prevention device;

[0011] A transparent formation cup, the transparent formation cup being connected to the input end of the formation liquid loss prevention device through a flow guide pipe;

[0012] A waste liquid storage component is connected to the output end of the formation liquid loss prevention device through a confluence component.

[0013] In summary, the utility model provides a formation liquid loss prevention device and a battery formation liquid loss prevention system, which have the following technical effects:

[0014] By forming a buffer flow channel in the receiving chamber, the electrolyte overflowing from the transparent formation cup and in a gaseous state is guided into the buffer flow channel, and the electrolyte is blocked, and finally the electrolyte is stored in the buffer flow channel in the receiving chamber, reducing or even preventing the electrolyte from flowing into the waste liquid storage part (i.e., the waste liquid barrel of the prior art). In this way, the vacuum pump can be well controlled and maintained in the optimal pressure value range / vacuum degree to completely remove the gas generated by the chemical reaction inside the battery, avoiding the undesirable phenomenon of interface black spots due to too low pressure value, and at the same time, more effectively solving the problem of large electrolyte loss during the formation process. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is an overall assembly structure diagram of a formation liquid loss prevention device of the utility model;

[0016] Figure 2 This is an overall explosion structure diagram of a formation liquid loss prevention device of the utility model;

[0017] Figure 3 for Figure 2 A local enlarged schematic diagram of the middle A;

[0018] Figure 4 It is a top view schematic diagram of the assembly of a formation liquid loss prevention device of the utility model;

[0019] Figure 5 for Figure 4 A schematic diagram of the full cross section of the BB in FIG.

[0020] Figure 6 It is a first front view schematic diagram of a formation liquid loss prevention device of the utility model;

[0021] Figure 7 for Figure 6 Schematic diagram of the full cross section of CC in;

[0022] Figure 8 for Figure 6 A schematic diagram of the full cross section of the DD in FIG.

[0023] Fig. 9 It is a second front view schematic diagram of a formation liquid loss prevention device of the utility model;

[0024] Fig.10 for Fig. 9 A schematic diagram of the full cross section of the EE in FIG.

[0025] Fig.11 The utility model is an assembly diagram of a battery formation liquid loss prevention system.

[0026] Icons: 1- formation liquid loss prevention device, 11- device body, 111- containing chamber, 112- output end, 113- input end, 114- buffer flow channel, 1141- output unit cavity, 1142- input unit cavity, 1143- buffer unit cavity, 115- flow disturbance barrier, 116- device sealing cover, 117- device mounting seat, 118- sealing member, 119- sealing groove, 110- flow channel gap, 12- circulation cooling member, 121- cooling chamber, 122- circulation input end, 123- circulation output end, 124- fluid guide part, 125- serpentine flow channel, 126- guide gap, 2- transparent formation cup, 3- waste liquid storage member, 4- guide pipe member, 5- confluence assembly, 51- current collecting member, 52- drainage pipe, 6- battery cell. DETAILED DESCRIPTION

[0027] For better understanding and implementation, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention.

[0028] In the description of the present invention, it should be noted that the terms "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside" and "outside" etc. indicating directions or positional relationships are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation on the present invention.

[0029] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art of the present invention. The terms used herein in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention.

[0030] Please refer to Fig.11 As shown, the utility model discloses a battery formation liquid loss prevention system, which includes a transparent formation cup 2 and a waste liquid storage component 3. The transparent formation cup 2 is connected to the liquid injection hole of the battery cell 6. The electrolyte in the battery cell 6 enters the transparent formation cup 2 under the negative pressure of the vacuum pump. By utilizing the transparent characteristic of the transparent formation cup 2, the liquid level of the electrolyte in the battery cell 6 entering the transparent formation cup 2 during the formation process can be observed.

[0031] In this embodiment, the vacuum pump is controlled to be at an optimal pressure value or pressure value range, so as to effectively avoid the risk of black spots on the interface caused by the inability to completely discharge the chemical reaction gas inside the battery. When the vacuum pump is kept at an optimal pressure value or pressure value range, the electrolyte flows into the transparent formation cup 2, and the gaseous electrolyte formed by the electrolyte evaporating under negative pressure will flow out of the transparent formation cup 2 after the transparent formation cup 2 is filled.

[0032] The core solution of this embodiment is to Fig.11 As shown, the battery formation liquid loss prevention system also includes a formation liquid loss prevention device 1, and the transparent formation cup 2 is connected to the input end 113 of the formation liquid loss prevention device 1 through the guide pipe 4, so that the gaseous electrolyte and the electrolyte overflowing the transparent formation cup 2 are first transported to the formation liquid loss prevention device 1 for storage, thereby preventing the gaseous electrolyte and the electrolyte overflowing the transparent formation cup 2 from directly flowing to the waste liquid storage part 3, thereby effectively solving the problem of large liquid loss. Further, the waste liquid storage part 3 is connected to the output end 112 of the formation liquid loss prevention device 1 through the confluence component 5.

[0033] Understandable, please refer to Fig.11As shown, the number of transparent formation cups 2 is multiple, each transparent formation cup 2 is connected to a corresponding battery cell 6, and each transparent formation cup 2 is correspondingly configured with a formation anti-liquid loss device 1, so that multiple battery cells 6 can be subjected to formation processes at the same time, greatly improving the efficiency of the formation anti-liquid loss system for the battery. The above-mentioned confluence assembly 5 includes a current collecting piece 51 and a drainage tube 52, one end of the drainage tube 52 is connected to the current collecting piece 51, and the other end of the drainage tube 52 is connected to the waste liquid storage piece 3, and the output end 112 of each formation anti-liquid loss device 1 is connected to the waste liquid storage piece 3 through a connecting pipe, so that the excess electrolyte overflowing from the formation anti-liquid loss device 1 is collected to the current collecting piece 51 of the confluence assembly 5, and finally flows to the waste liquid storage piece 3 under the guidance of the drainage tube 52.

[0034] Please refer to the following for details: Figure 1 and Fig.10 As shown, the above-mentioned formation liquid loss prevention device 1 includes a device body 11, and the device body 11 is provided with a accommodating chamber 111, an output end 112 and an input end 113 for connecting to the transparent formation cup 2. The output end 112 and the input end 113 are preferably arranged on two opposite sides of the accommodating chamber 111. A buffer flow channel 114 is formed inside the accommodating chamber 111. The output end 112 and the input end 113 are both connected to the accommodating chamber 111. The extension path of the buffer flow channel 114 is used to make the electrolyte flowing into the accommodating chamber 111 fully cooled and buffered, and finally stored in the buffer flow channel 114 in the accommodating chamber 111, so as to block and store the electrolyte.

[0035] Specifically, Figure 4 , Figure 5 , Figure 6 , Figure 8 , Fig. 9 and Fig.10 As shown, the output end 112 includes an output port provided on the device body 11 and an output pipe joint fixed to the output port. The input end 113 includes an input port provided on the device body 11 and an input pipe joint fixed to the input port. The output pipe joint and the input pipe joint both use existing standard pipe joints to facilitate subsequent disassembly and maintenance, and also reduce the overall production cost of the formation liquid loss prevention device 1.

[0036] As a preferred method of this embodiment, please refer to Figure 2 , Figure 3 , Figure 6 , Figure 8 , Fig. 9 and Fig.10As shown, the inner wall of the accommodating chamber 111 is provided with a flow disturbance barrier 115, a plurality of flow disturbance barrier portions 115 are arranged at intervals, and a plurality of flow disturbance barrier portions 115 are staggered from the input end portion 113 toward the output end portion 112 to form a buffer flow channel 114. The buffer flow channel 114 extends back and forth from the input end portion 113 toward the output end portion 112 side, so that the path of the buffer flow channel 114 formed in the accommodating chamber 111 is the longest, effectively ensuring that the electrolyte flowing in the buffer flow channel 114 is cooled and buffered for a longer time.

[0037] Specifically, please combine Figure 5 , Figure 8 and Fig.10 As shown, the spoiler barrier 115 near the output end 112 is defined as the first spoiler, the spoiler barrier 115 near the input end 113 is defined as the second spoiler, and the spoiler barrier 115 disposed between the first spoiler and the second spoiler is defined as the third spoiler. If the spoiler barrier 115 divides the accommodating chamber 111 into a plurality of unit chambers, the unit chamber between the second spoiler and the input end 113 is defined as the input unit chamber 1142, the unit chamber between the first spoiler and the output end 112 is defined as the output unit chamber 1141, and the unit chambers between the first spoiler and the third spoiler, the second spoiler and the third spoiler, and the unit chambers between two adjacent third spoilers are defined as the buffer unit chamber 1143.

[0038] After the electrolyte (gaseous and / or liquid) enters the input unit cavity 1142 through the input end 113, the electrolyte is blocked by the second spoiler to form a preliminary buffer. After the electrolyte after the preliminary buffer enters the buffer unit cavity 1143, it will be blocked by at least one third spoiler to form a secondary buffer.

[0039] In this way, the electrolyte will encounter resistance and other disturbance phenomena in the process of moving sequentially between the input unit cavity 1142, the buffer unit cavity 1143 and the output unit cavity 1141, and will stay in the buffer flow channel 114 / unit chamber for a longer time. On the one hand, the flow path of the electrolyte is extended while the momentum loss of the electrolyte is increased. That is, the disturbance of the electrolyte by the disturbance barrier 115 will cause a certain degree of loss of momentum of the electrolyte, reducing the flow rate of the electrolyte. On the other hand, the electrolyte is blocked by the disturbance barrier 115 to form small vortices and small bubbles, which promotes the mixing of gaseous electrolyte and liquid electrolyte, increases the dissolution rate and contact surface of the gaseous electrolyte, and then slows down the flow rate of the electrolyte. Finally, the electrolyte will be stably stored in the buffer flow channel 114.

[0040] Preferably, Figure 2 , Figure 8 and Fig.10As shown, the first direction T1 defining the accommodating chamber 111 is consistent with the arrangement direction of the plurality of spoiler blocking portions 115, each spoiler blocking portion 115 extends from an inner cavity wall of the accommodating chamber 111 to the opposite inner cavity wall along the second direction T2, and is formed with flow channel gaps 110, and the second direction T2 is perpendicular to the first direction T1. In other embodiments, the second direction T2 is inclined to the first direction T1, and the angle formed between the spoiler blocking portion 115 and the inner cavity wall of the accommodating chamber 111 is not limited here, and can be set or adjusted according to the structural design and design requirements.

[0041] As a further preferred method of this embodiment, please refer to Figure 2 , Figure 3 , Figure 6 , Figure 8 , Fig. 9 and Fig.10 As shown, the spacing of the above-mentioned flow channel gap 110 is defined as the gap width, and the ratio between the gap width and the length of the flow spoiler barrier 115 is 0.01 to 0.04. When the ratio between the gap width and the length of the flow spoiler barrier 115 is less than 0.01, electrolyte crystallization easily causes blockage of the flow channel gap 110 and the buffer flow channel 114 and forms a vacuum path, thereby causing the problem of vacuum failure. When the ratio between the gap width and the length of the flow spoiler barrier 115 is greater than 0.04, the contact area between the electrolyte and the flow spoiler barrier 115 is small, so that the effect of electrolyte retardation is reduced, and the electrolyte flow rate is high, resulting in a high risk of electrolyte overflowing the containing chamber 111, which in turn leads to a large amount of electrolyte loss. When the ratio between the gap width and the length of the flow spoiler barrier 115 is within the range of 0.01 to 0.04, not only can the blocking effect of the flow spoiler barrier 115 on the electrolyte be guaranteed, but also the risk of blockage and vacuum path formation can be avoided. Of course, the ratio between the gap width and the length of the spoiler barrier 115 is preferably 0.02, 0.025, or 0.03.

[0042] It should be noted that, in order to facilitate the formation of the spoiler barrier 115 and the buffer flow channel 114 in the accommodating chamber 111, the above-mentioned device body 11 also includes a device sealing cover 116 and a device mounting seat 117, and the device sealing cover 116 and the device mounting seat 117 can be separately produced and manufactured, which reduces the manufacturing difficulty and manufacturing cost of the device body 11. The device mounting seat 117 is provided with the accommodating chamber 111, the output end 112 and the input end 113, and the device sealing cover 116 is fixedly connected to the device mounting seat 117. The fixed connection referred to here can be selected as a bolt connection, a clamping connection, a magnetic connection, or a combination of any of the above two connection methods, or a combination of the above three connection methods, or the fixed connection can also be selected as a welding connection.

[0043] As a further preferred embodiment of this embodiment, Figure 2 , Figure 3 , Figure 6 and Figure 8 As shown, a sealing groove 119 is disposed on one side of each spoiler barrier 115 close to the device sealing cover 116 , and a sealing member 118 is disposed inside each sealing groove 119 .

[0044] Specifically, the shape and size of the sealing groove 119 are compatible with the shape and size of the sealing member 118, and the sealing groove 119 extends along the extension direction of the spoiler barrier 115, that is, the groove length direction of the sealing groove 119 is consistent with the second direction T2. ​​It can be understood that the cross section of the sealing groove 119 can be an arc groove, a triangular groove, or a rectangular groove. The sealing member 118 is preferably made of fluororubber material. Of course, the sealing member 118 can also be selected from other rubber materials, or can also be selected from silicone materials.

[0045] In this way, under the action of the sealing groove 119, the sealing member 118 can be quickly installed and positioned in the corresponding sealing groove 119, thereby improving the assembly efficiency and stably constraining the sealing member 118 in the sealing groove 119. In addition, through the cooperation between the sealing groove 119 and the sealing member 118, not only can the assembly error between the spoiler barrier 115 and the device sealing cover 116 be compensated, but also the device sealing cover 116 and the device mounting seat 117 can be effectively sealed to prevent the risk of leakage between the spoiler barrier 115 and the device sealing cover 116.

[0046] As a preferred method of this embodiment, please refer to Figure 1 and Figure 2 As shown, a circulating cooling member 12 is provided on the device body 11, and a cooling chamber 121 is provided inside the circulating cooling member 12. The cooling chamber 121 is used to store and guide the directional flow of a heat exchange medium. The heat exchange medium can be selected as water or a coolant of other materials. The temperature of the heat exchange medium is preferably less than 10 degrees Celsius. The cooling chamber 121 forms a heat exchange with the containing chamber 111, that is, the temperature of the electrolyte after the formation process is 45±5°C. The heat carried by the electrolyte flowing into the containing chamber 111 is transferred to the cavity wall of the containing chamber 111 and is quickly absorbed by the heat exchange medium of the cooling chamber 121, so as to achieve the purpose of quickly cooling the electrolyte.

[0047] The unexpected effect is that, under the action of the circulating cooling member 12, not only can the electrolyte be cooled very efficiently, but also the evaporation of the electrolyte can be reduced in a timely and rapid manner, that is, the gaseous electrolyte can be quickly converted into a liquid electrolyte. At the same time, it is also beneficial for the gaseous electrolyte to be quickly mixed into the liquid electrolyte, further slowing down the flow rate of the electrolyte, thereby being very beneficial for reducing the loss of electrolyte and improving the problem of large electrolyte loss to a greater extent.

[0048] Optionally, a thermal insulation and water-absorbing layer can be formed on the outer wall of the device body 11. The thermal insulation and water-absorbing layer is preferably made of high-temperature resistant thermal insulation cotton. When the heat exchange medium is passed into the cooling chamber 121, condensation drips will easily form on the outer wall of the circulating cooling component 12. At this time, the thermal insulation and water-absorbing layer will be able to absorb the water droplets formed by the condensation. At the same time, it can also isolate the temperature outside the device body 11 and reduce the evaporation of the electrolyte.

[0049] It should be noted that the thermal insulation and water absorption layer at least covers the outer side wall of the device mounting seat 117 of the device body 11. In addition, the thermal insulation and water absorption layer may also cover the outer side wall of the device mounting seat 117 and the device sealing cover 116 of the device body 11.

[0050] As a preferred method of this embodiment, please refer to Figure 6 and Figure 7 As shown, the above-mentioned circulating cooling member 12 is provided with a circulating input end 122 and a circulating output end 123. The circulating input end 122 and the circulating output end 123 are preferably arranged on two opposite sides of the cooling chamber 121. The cooling chamber 121 is provided with a plurality of fluid guide portions 124 at intervals, and the plurality of fluid guide portions 124 are staggeredly arranged from the circulating input end 122 toward the circulating output end 123 to form a serpentine flow channel 125.

[0051] In this way, after the heat exchange medium flows from the circulation input end 122 into the serpentine flow channel 125, it will flow along the serpentine flow channel 125 and be output from the circulation output end 123. The heat exchange medium has the longest distance in the cooling chamber 121, and the heat exchange medium will be able to exchange heat with the electrolyte more evenly and fully, thereby improving the heat exchange efficiency of the heat exchange medium. At the same time, after the heat exchange medium is input into the serpentine flow channel 125 from the circulation input end 122, it will be blocked by the fluid guide part 124 to form a turbulent flow, thereby ensuring that the heat exchange medium flowing into the serpentine flow channel 125 does not flow too fast.

[0052] For further details, please refer to Figure 6 and Figure 7 As shown, the fluid guide portion 124 extends from an inner cavity wall of the cooling chamber 121 along a third direction T3 to the opposite inner cavity wall, and is formed with guide gaps 126 at intervals. The third direction T3 is perpendicular to the arrangement direction of the plurality of fluid guide portions 124, and the ratio between the gap width of the guide gap 126 and the length of the fluid guide portion 124 is 0.11 to 1.

[0053] Specifically, when the ratio between the gap width of the guide gap 126 and the length of the fluid guide portion 124 is 0.11 to 1, the flow rate of the heat exchange medium can be effectively ensured to be fast, thereby taking away the heat of the electrolyte, reducing the evaporation of the electrolyte in the accommodating chamber 111, and achieving the purpose of rapid cooling. When the ratio between the gap width of the guide gap 126 and the length of the fluid guide portion 124 is less than 0.11, the flow rate of the heat exchange medium is slow, the cooling efficiency is low, and the cooling effect is poor. Preferably, the ratio between the gap width of the guide gap 126 and the length of the fluid guide portion 124 is 0.5, 0.6, 0.7, 0.8, 0.9.

[0054] The technical means disclosed in the scheme of the utility model are not only the technical means disclosed in the above-mentioned implementation mode, but also include the technical scheme composed of any combination of the above-mentioned technical features. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principle of the utility model, and these improvements and modifications are also regarded as the protection scope of the utility model.

Claims

1. A formation liquid loss prevention device (1), characterized in that: include: A device body (11), wherein a accommodating chamber (111), an output end (112) and an input end (113) for connecting to a transparent formation cup (2) are arranged inside the device body (11), a buffer flow channel (114) is formed inside the accommodating chamber (111), the output end (112) and the input end (113) are both connected to the accommodating chamber (111), and the buffer flow channel (114) is used to block and store electrolyte.

2. The formation liquid loss prevention device (1) according to claim 1, characterized in that: The inner wall of the accommodating chamber (111) is provided with a plurality of flow disturbance blocking portions (115), a plurality of the flow disturbance blocking portions (115) are arranged at intervals, and a plurality of the flow disturbance blocking portions (115) are arranged in a staggered manner from the input end portion (113) toward the output end portion (112) to form the buffer flow channel (114).

3. The formation liquid loss prevention device (1) according to claim 2, characterized in that: A first direction T1 defining the accommodating chamber (111) is consistent with an arrangement direction of the plurality of spoiler blocking portions (115); each spoiler blocking portion (115) extends from an inner cavity wall of the accommodating chamber (111) to an opposite inner cavity wall along a second direction T2, and is formed with flow channel gaps (110) at intervals; the second direction T2 is perpendicular to the first direction T1.

4. The formation liquid loss prevention device (1) according to claim 3, characterized in that: The spacing of the flow channel gap (110) is defined as the gap width, and the ratio of the gap width to the length of the flow-turbine blocking portion (115) is 0.01 to 0.

04.

5. The formation liquid loss prevention device (1) according to any one of claims 1 to 4, characterized in that: A circulating cooling element (12) is arranged on the device body (11), a cooling chamber (121) is arranged inside the circulating cooling element (12), and heat exchange is formed between the cooling chamber (121) and the containing chamber (111).

6. The formation liquid loss prevention device (1) according to claim 5, characterized in that: The circulating cooling element (12) is provided with a circulating input end (122) and a circulating output end (123); the cooling chamber (121) is provided with a plurality of fluid guide portions (124) at intervals, and the plurality of fluid guide portions (124) are arranged in a staggered manner from the circulating input end (122) toward the circulating output end (123) to form a serpentine flow channel (125).

7. The formation liquid loss prevention device (1) according to claim 6, characterized in that: The fluid guide portion (124) extends from an inner cavity wall of the cooling chamber (121) along a third direction T3 to an opposite inner cavity wall, and is formed with guide gaps (126) at intervals, the third direction T3 being perpendicular to the arrangement direction of the plurality of fluid guide portions (124), and the ratio between the gap width of the guide gap (126) and the length of the fluid guide portion (124) is 0.11 to 1.

8. The formation liquid loss prevention device (1) according to any one of claims 1 to 4, characterized in that: A heat-insulating and water-absorbing layer is formed on the outer side wall of the device body (11).

9. The formation liquid loss prevention device (1) according to claim 2, 3 or 4, characterized in that: The device body (11) further comprises a device sealing cover (116) and a device mounting seat (117); the device mounting seat (117) is provided with the accommodating chamber (111), the output end (112) and the input end (113); and the device sealing cover (116) is fixedly connected to the device mounting seat (117).

10. The formation liquid loss prevention device (1) according to claim 9, characterized in that: A sealing groove (119) is provided on one side of each of the turbulence blocking portions (115) close to the device sealing cover (116), and a sealing member (118) is disposed inside each of the sealing grooves (119).

11. A battery formation liquid loss prevention system, characterized in that: include: The chemical formation liquid loss prevention device (1) according to any one of claims 1 to 10; A transparent formation cup (2), wherein the transparent formation cup (2) is connected to an input end (113) of the formation liquid loss prevention device (1) via a flow guide pipe (4); A waste liquid storage component (3) is connected to the output end (112) of the formation liquid loss prevention device (1) via a confluence component (5).

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