Electrolyte preparation system

Abstract

The utility model relates to the technical field of electrolyte preparation, and provides an electrolyte preparation system which comprises a first reaction container, a second reaction container, a buffer container, a protective gas source and a three-way reversing valve, a feeding pipe is arranged on the first reaction container, and a discharging pipe is arranged on the second reaction container; the three-way reversing valve comprises a first interface, a second interface and a third interface, the first reaction container is connected with the first interface, the second reaction container is connected with the second interface, and the buffer container is connected with the third interface; the protective gas source is respectively connected with the first reaction container, the second reaction container and the buffer container. The utility model provides a solution that the sensitive additive cannot exist in the electrolyte for a long time, can realize on-site preparation of the electrolyte, and solves the problems that the existing electrolyte preparation method is difficult to avoid long-time contact between the additive and air, the dispersion and premixing time of the additive in the electrolyte is difficult to control, and the service life of the additive is prolonged. And the additive in the electrolyte is not uniformly distributed, so that the performance of the battery is influenced.

Description

Technical Field

[0001] The utility model relates to the technical field of electrolyte preparation, in particular to an electrolyte preparation system. Background Art

[0002] As one of the key materials of batteries, the main components of electrolytes greatly affect the performance of batteries. As the expectations for battery performance in various application scenarios become higher and higher, the types and amounts of electrolyte additives are gradually increasing, which puts forward new requirements for the configuration, transportation and storage of electrolytes.

[0003] At present, the common method is that the electrolyte factory prepares the electrolyte and transports it to the battery cell factory for the injection process. However, this method is not suitable for the addition of some unstable additives that are not suitable for long-term contact with air or solvents, or electrolytes that require injection in a short time (such as polymer solid electrolytes), and it is impossible to control the dispersion and premixing time of the additives in the electrolyte. This leads to uneven distribution of additives in the electrolyte, affecting the performance and stability of the battery. Utility Model Content

[0004] The utility model provides an electrolyte preparation system, proposes a solution to the problem that sensitive additives cannot exist in the electrolyte for a long time, and can realize the electrolyte preparation on-the-go, so as to solve the problem that it is difficult to avoid the long-term contact of the additives with the air in the existing electrolyte preparation method, and it is difficult to control the dispersion and premixing time of the additives in the electrolyte, resulting in uneven distribution of the additives in the electrolyte, affecting the performance and stability defects of the battery.

[0005] The utility model provides an electrolyte preparation system, comprising: a first reaction container, a second reaction container, a buffer container, a protective gas source and a three-way reversing valve, wherein the first reaction container is provided with a feeding pipe, and the second reaction container is provided with a discharging pipe.

[0006] The three-way reversing valve includes a first interface, a second interface and a third interface. The first reaction container is connected to the first interface through a pipeline, the second reaction container is connected to the second interface through a pipeline, and the cache container is connected to the third interface through a pipeline.

[0007] The protective gas source is connected to the first reaction container, the second reaction container and the buffer container respectively through pipelines.

[0008] According to the electrolyte preparation system provided by the utility model, a first control valve is provided on the pipeline connecting the first reaction container and the protective gas source, a second control valve is provided on the pipeline connecting the second reaction container and the protective gas source, and a third control valve is provided on the pipeline connecting the cache container and the protective gas source.

[0009] According to the electrolyte preparation system provided by the utility model, it also includes an additive storage module, and the additive storage module includes at least one additive storage container, and the additive storage container is connected to the first reaction container through the feeding pipe.

[0010] According to the electrolyte preparation system provided by the utility model, the additive storage module includes a plurality of the additive storage containers, and the plurality of additive storage containers are respectively connected to the feeding pipe through pipelines.

[0011] According to the electrolyte preparation system provided by the utility model, a fourth control valve is provided on the pipeline connecting each additive storage container and the feeding pipe, and a fifth control valve is provided on the feeding pipe.

[0012] According to the electrolyte preparation system provided by the utility model, it also includes an electrolyte storage module, and the electrolyte storage module includes at least one electrolyte storage container, and the electrolyte storage container is connected to the second reaction container through the discharge pipe.

[0013] According to the electrolyte preparation system provided by the utility model, the electrolyte storage module includes a plurality of the electrolyte storage containers, and the plurality of the electrolyte storage containers are respectively connected to the discharge pipe through pipelines.

[0014] According to the electrolyte preparation system provided by the utility model, a sixth control valve is provided on the pipeline connecting each electrolyte storage container and the discharge pipe, and a seventh control valve is provided on the discharge pipe.

[0015] According to the electrolyte preparation system provided by the utility model, the first reaction container is provided with a first pressure relief valve, the second reaction container is provided with a second pressure relief valve, and the buffer container is provided with a third pressure relief valve.

[0016] According to the electrolyte preparation system provided by the utility model, the protective gas source includes a protective gas container, and the protective gas container is respectively connected to the first reaction container, the second reaction container and the buffer container through pipelines.

[0017] The electrolyte preparation system provided by the utility model is provided with a first reaction container, a second reaction container, a buffer container, a protective gas source and a three-way reversing valve. The three-way reversing valve can control the connection between the first reaction container, the second reaction container and the buffer container. During the preparation process of the electrolyte, it can ensure that the additive is always not in contact with the air, and through the switching of the three-way reversing valve and the time of the protective gas source to introduce gas, the mixing time of the electrolyte and the additive can be accurately controlled to avoid the problem that the active additive is in contact with the air or exists in the electrolyte for too long and becomes ineffective, thereby improving the product quality. The electrolyte preparation system provided by the utility model proposes a solution to the problem that sensitive additives cannot exist in the electrolyte for a long time, and can realize the electrolyte being prepared on the spot, solving the problem that the existing electrolyte configuration method is difficult to avoid the additive from being in contact with the air for a long time, and it is difficult to control the dispersion and premixing time of the additive in the electrolyte, resulting in uneven distribution of the additive in the electrolyte, affecting the performance and stability defects of the battery.

[0018] Additional aspects and advantages of the present invention will be given in part in the following description, and in part will become apparent from the following description, or will be learned through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the technical solutions in the present invention or the prior art, a brief introduction will be given below to the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0020] Figure 1 It is a schematic diagram of an electrolyte preparation system provided in an embodiment of the utility model.

[0021] Reference numerals:

[0022] 1. First reaction container; 2. Second reaction container; 3. Buffer container; 4. Three-way reversing valve; 5. Feeding pipe; 6. Discharging pipe; 7. First control valve; 8. Second control valve; 9. Third control valve; 10. Fifth control valve; 11. Seventh control valve; 12. First pressure relief valve; 13. Second pressure relief valve; 14. Third pressure relief valve. DETAILED DESCRIPTION

[0023] In order to make the purpose, technical solution and advantages of the utility model clearer, the technical solution of the utility model will be described clearly and completely in conjunction with the drawings in the utility model. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0024] In the description of the embodiments of the present utility model, it should be noted that the terms "center", "longitudinal", "lateral", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the embodiments of the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the embodiments of the present utility model. In addition, the terms "first", "second", and "third" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance.

[0025] In the description of the embodiments of the present utility model, it should be noted that, unless otherwise clearly specified and limited, the terms "connected" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in the embodiments of the present utility model can be understood according to specific circumstances.

[0026] In the embodiments of the present invention, unless otherwise clearly specified and limited, the first feature being "above" or "below" the second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, the first feature being "above", "above" and "above" the second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. The first feature being "below", "below" and "below" the second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0027] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model embodiment. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0028] Combine the following Figure 1 The invention describes an electrolyte preparation system provided by the utility model.

[0029] See also Figure 1 As shown, the electrolyte preparation system provided by the embodiment of the utility model includes a first reaction container 1, a second reaction container 2, a buffer container 3, a protective gas source (not shown in the figure) and a three-way reversing valve 4. The first reaction container 1 is provided with a feeding pipe 5, and the second reaction container 2 is provided with a discharge pipe 6.

[0030] Among them, the three-way reversing valve 4 includes a first interface, a second interface and a third interface. The first reaction container 1 is connected to the first interface through a pipeline, the second reaction container 2 is connected to the second interface through a pipeline, and the cache container 3 is connected to the third interface through a pipeline.

[0031] The protective gas source is connected to the first reaction container 1, the second reaction container 2 and the buffer container 3 through pipelines respectively.

[0032] The electrolyte preparation system provided by the utility model is provided with a first reaction container 1, a second reaction container 2, a buffer container 3, a protective gas source and a three-way reversing valve 4. The three-way reversing valve 4 can control the connection between the first reaction container 1, the second reaction container 2 and the buffer container 3. During the preparation process of the electrolyte, it can ensure that the additive is always not in contact with the air, and through the switching of the three-way reversing valve 4 and the time for the protective gas source to introduce gas, the mixing time of the electrolyte and the additive can be accurately controlled to avoid the problem that the active additive is in contact with the air or exists in the electrolyte for too long and becomes ineffective, thereby improving the product quality. The electrolyte preparation system provided by the utility model proposes a solution to the problem that sensitive additives cannot exist in the electrolyte for a long time, and can realize the electrolyte being prepared on the spot, solving the problem that the existing electrolyte configuration method is difficult to avoid the additive from being in contact with the air for a long time, and it is difficult to control the dispersion and premixing time of the additive in the electrolyte, resulting in uneven distribution of the additive in the electrolyte, affecting the performance and stability defects of the battery.

[0033] Specifically, the preparation process of the electrolyte preparation system provided by the present invention is as follows: steps 1 to 6.

[0034] Step 1: Connect the second reaction container 2 and the buffer container 3 through the three-way reversing valve 4, introduce protective gas into the second reaction container 2 through the protective gas source, and press part of the initial electrolyte without additives from the second reaction container 2 into the buffer container 3.

[0035] Step 2: Connect the first reaction container 1 and the second reaction container 2 through the three-way reversing valve 4, introduce protective gas into the second reaction container 2 through the protective gas source, press the remaining initial electrolyte without additives in the second reaction container 2 into the first reaction container 1, and add corresponding additives to the initial electrolyte in the first reaction container 1 through the feeding pipe 5, and dissolve for a certain period of time.

[0036] Step 3: Connect the first reaction container 1 and the second reaction container 2 through the three-way reversing valve 4, introduce protective gas into the first reaction container 1 through the protective gas source, and press all the electrolyte containing the additive dissolved in the first reaction container 1 into the second reaction container 2.

[0037] Step 4: Connect the first reaction container 1 and the buffer container 3 through the three-way reversing valve 4, introduce protective gas into the buffer container 3 through the protective gas source, press the initial electrolyte without additives pre-stored in the buffer container 3 into the first reaction container 1 for cleaning, and after cleaning, introduce the cleaning mixture into the first reaction container 1.

[0038] Step 5: Stir the mixed electrolyte in the second reaction container 2 to complete the preparation of the electrolyte containing the specific additive.

[0039] Step 6: A protective gas is introduced into the second reaction container 2 through a protective gas source, and the prepared electrolyte containing the specific additive is discharged to a specific location (such as a liquid injection process or a storage device) through a discharge pipe 6.

[0040] It can be seen that the electrolyte preparation system provided by the utility model can also introduce part of the initial electrolyte without additives into the buffer container 3, and use the part of the electrolyte to clean the first reaction container 1, so that the system has self-cleaning ability.

[0041] Among them, the protective gas is nitrogen, argon and helium.

[0042] See also Figure 1As shown, according to some embodiments of the utility model, a first control valve 7 is provided on the pipeline connecting the first reaction container 1 and the protective gas source, a second control valve 8 is provided on the pipeline connecting the second reaction container 2 and the protective gas source, and a third control valve 9 is provided on the pipeline connecting the buffer container 3 and the protective gas source. By providing the first control valve 7, the second control valve 8 and the third control valve 9, the on-off of the corresponding pipeline connected to the protective gas source can be controlled, so that the protective gas source can be conducted to any one of the first reaction container 1, the second reaction container 2 or the buffer container 3, and the combination with the three-way reversing valve 4 can realize precise control of the liquid flow direction.

[0043] According to some embodiments of the utility model, the electrolyte preparation system further includes an additive storage module (not shown in the figure), the additive storage module includes at least one additive storage container, and the additive storage container is connected to the first reaction container 1 through the feeding pipe 5. By setting up the additive storage module, it is convenient to store and preserve the additive, effectively protect the additive from the influence of air, moisture or other pollutants, and maintain the stability and activity of the additive. And when it is necessary to add additives into the first reaction container 1, it can be added directly through the additive storage container, and the system composition is simple and easy to control.

[0044] According to some embodiments of the present invention, the additive storage module includes a plurality of additive storage containers, and the plurality of additive storage containers are respectively connected to the feeding pipe 5 through pipelines. By configuring the additive storage module as a plurality of additive storage containers, a plurality of different types of additives can be stored independently, so that the corresponding additives can be selected according to the preparation requirements of the electrolyte, which significantly improves the flexibility of the system.

[0045] According to some embodiments of the utility model, a fourth control valve is provided on the pipeline connecting each additive storage container and the feeding pipe 5, and a fifth control valve 10 is provided on the feeding pipe 5. By providing a fourth control valve on the pipeline connecting each additive storage container and the feeding pipe 5, the on-off of the pipeline connected to each additive storage container can be independently controlled, and when the corresponding additive needs to be introduced into the first reaction container 1, the corresponding fourth control valve can be opened. In addition, by providing the fifth control valve 10 on the feeding pipe 5, the on-off of the feeding pipe 5 can be controlled to prevent the additive from being added to the first reaction container 1 by mistake when the fourth control valve fails.

[0046] It should be noted that, in the actual production process, the pipelines connecting different additive storage containers with the feeding pipe 5 need to be cleaned after use to prevent cross contamination. Of course, the additive storage container can also be directly connected to the first reaction container 1.

[0047] According to some embodiments of the present invention, the electrolyte preparation system further includes an electrolyte storage module (not shown in the figure), the electrolyte storage module includes at least one electrolyte storage container, and the electrolyte storage container is connected to the second reaction container 2 through a discharge pipe 6. By providing an electrolyte storage module, the prepared electrolyte can be temporarily stored for use when needed, which is suitable for large-scale production or when the electrolyte needs to be taken regularly.

[0048] According to some embodiments of the present invention, the electrolyte storage module includes a plurality of electrolyte storage containers, and the plurality of electrolyte storage containers are respectively connected to the discharge pipe 6 through pipelines. By providing a plurality of electrolyte storage containers, different types of prepared electrolytes can be stored separately, so that different electrolytes can be taken during production.

[0049] Of course, in some embodiments, the prepared electrolyte may also be directly discharged to the liquid injection process through the discharge pipe 6 .

[0050] According to some embodiments of the utility model, a sixth control valve is provided on the pipeline connecting each electrolyte storage container and the discharge pipe 6, and a seventh control valve 11 is provided on the discharge pipe 6. By providing the sixth control valve on the pipeline connecting each electrolyte storage container and the discharge pipe 6, the on-off of each pipeline connected to the electrolyte storage container can be independently controlled, and by providing the seventh control valve 11 on the discharge pipe 6, the on-off of all pipelines connected to the electrolyte storage containers can be controlled.

[0051] It should be noted that, in the actual production process, the pipelines different from the electrolyte storage containers need to be cleaned after use to prevent cross contamination. Of course, the second reaction container 2 can also be directly connected to each electrolyte storage container.

[0052] See also Figure 1 As shown, according to some embodiments of the present utility model, the first reaction vessel 1 is provided with a first pressure relief valve 12, the second reaction vessel 2 is provided with a second pressure relief valve 13, the buffer container 3 is provided with a third pressure relief valve 14, and the feeding control valve is provided on the feeding pipe 5. By providing the first pressure relief valve 12, the second pressure relief valve 13 and the third pressure relief valve 14, the protective gas introduced into the first reaction vessel 1, the second reaction vessel 2 and the buffer container 3 can be released to the outside to ensure the pressure stability of each container.

[0053] According to some embodiments of the present invention, the protective gas source includes a protective gas container, which is connected to the first reaction container 1, the second reaction container 2 and the buffer container 3 through pipelines. By providing a protective gas container, protective gas can be pre-stored for easy use.

[0054] It should be noted that, in order to prevent the backflow of the fluid, each control valve in the embodiment of the utility model adopts a one-way valve.

[0055] The following is a specific example of the preparation process of the electrolyte preparation system provided by the utility model. Figure 1 As shown in FIG. 1 , nitrogen is taken as an example of the protective gas.

[0056] Step 1: Connect the second reaction container 2 and the buffer container 3 through the three-way reversing valve 4, close the first control valve 7 and the third control valve 9, open the second control valve 8, introduce protective gas into the second reaction container 2 through the protective gas source, and press part of the initial electrolyte without additives from the second reaction container 2 into the buffer container 3.

[0057] Step 2: Connect the first reaction container 1 and the second reaction container 2 through the three-way reversing valve 4, close the first control valve 7 and the third control valve 9, open the second control valve 8, introduce protective gas into the second reaction container 2 through the protective gas source, press the remaining initial electrolyte without additives in the second reaction container 2 into the first reaction container 1, open the fifth control valve 10, add the corresponding additive to the initial electrolyte in the first reaction container 1 through the feeding pipe 5, open the second pressure relief valve 13, discharge the excess nitrogen in the second reaction container 2, and dissolve the additive for a certain period of time.

[0058] Step 3: Connect the first reaction container 1 and the second reaction container 2 through the three-way reversing valve 4, close the second control valve 8 and the third control valve 9, open the first control valve 7, introduce protective gas into the first reaction container 1 through the protective gas source, press all the electrolyte containing additives dissolved in the first reaction container 1 into the second reaction container 2, close the first control valve 7, adjust the three-way reversing valve 4 to the closed state, open the first pressure relief valve 12, and discharge the excess nitrogen in the first reaction container 1.

[0059] Step 4: Connect the first reaction container 1 and the buffer container 3 through the three-way reversing valve 4, close the first control valve 7 and the second control valve 8, open the third control valve 9, introduce protective gas into the buffer container 3 through the protective gas source, press the initial electrolyte without additives pre-stored in the buffer container 3 into the first reaction container 1 for cleaning, and after cleaning, introduce the cleaning mixture into the first reaction container 1, close the third control valve 9, adjust the three-way reversing valve 4 to the closed state, open the third pressure relief valve 14, and discharge the excess nitrogen in the buffer container 3.

[0060] Step 5: Stir the mixed electrolyte in the second reaction container 2 to complete the preparation of the electrolyte containing the specific additive.

[0061] Step 6: A protective gas is introduced into the second reaction container 2 through a protective gas source, and the prepared electrolyte containing the specific additive is discharged through the discharge pipe 6 to the liquid injection process.

[0062] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the utility model, rather than to limit it. Although the utility model has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the various embodiments of the utility model.

Claims

1. An electrolyte preparation system, characterized in that: include: A first reaction container, a second reaction container, a buffer container, a protective gas source and a three-way reversing valve, wherein the first reaction container is provided with a feeding pipe, and the second reaction container is provided with a discharging pipe; the three-way reversing valve comprises a first interface, a second interface and a third interface, the first reaction container is connected to the first interface via a pipeline, the second reaction container is connected to the second interface via a pipeline, and the buffer container is connected to the third interface via a pipeline; The protective gas source is connected to the first reaction container, the second reaction container and the buffer container respectively through pipelines.

2. The electrolyte preparation system according to claim 1, characterized in that: A first control valve is provided on the pipeline connecting the first reaction container and the protective gas source, a second control valve is provided on the pipeline connecting the second reaction container and the protective gas source, and a third control valve is provided on the pipeline connecting the buffer container and the protective gas source.

3. The electrolyte preparation system according to claim 1, characterized in that: It also includes an additive storage module, which includes at least one additive storage container. The additive storage container is connected to the first reaction container through the feeding pipe.

4. The electrolyte preparation system according to claim 3, characterized in that: The additive storage module includes a plurality of additive storage containers, and the plurality of additive storage containers are respectively connected to the feeding pipe through pipelines.

5. The electrolyte preparation system according to claim 4, characterized in that: A fourth control valve is provided on the pipeline connecting each of the additive storage containers and the feeding pipe, and a fifth control valve is provided on the feeding pipe.

6. The electrolyte preparation system according to claim 1, characterized in that: It also includes an electrolyte storage module, which includes at least one electrolyte storage container. The electrolyte storage container is connected to the second reaction container through the discharge pipe.

7. The electrolyte preparation system according to claim 6, characterized in that: The electrolyte storage module includes a plurality of electrolyte storage containers, and the plurality of electrolyte storage containers are respectively connected to the discharge pipe through pipelines.

8. The electrolyte preparation system according to claim 7, characterized in that: A sixth control valve is provided on the pipeline connecting each electrolyte storage container and the discharge pipe, and a seventh control valve is provided on the discharge pipe.

9. The electrolyte preparation system according to any one of claims 1 to 8, characterized in that: The first reaction container is provided with a first pressure relief valve, the second reaction container is provided with a second pressure relief valve, and the buffer container is provided with a third pressure relief valve.

10. The electrolyte preparation system according to any one of claims 1 to 8, characterized in that: The protective gas source includes a protective gas container, and the protective gas container is connected to the first reaction container, the second reaction container and the buffer container through pipelines.

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