Battery formation equipment and system

Abstract

The utility model relates to the technical field of battery manufacturing, in particular to battery formation equipment and system, and the equipment comprises a clamp and a liquid storage structure, the clamp internally comprises a cavity, and the battery and the liquid storage structure are arranged in the cavity; the liquid storage structure comprises a liquid injection port, a liquid outlet and a pressure regulating port, the liquid injection port is used for being connected with the pumping structure so as to pump the electrolyte into the liquid storage structure, the liquid injection port is communicated with the battery, the electrolyte in the liquid storage structure is injected into the battery through the liquid injection port, and the pressure regulating port is used for being connected with the pressure regulating structure so as to regulate the pressure in the liquid storage structure. According to the utility model, during liquid injection, electrolyte required by the battery is injected into the liquid storage structure through the pumping structure, the voltage regulation operation is performed on the environment where the liquid storage structure is located through the voltage regulation port, the operation of injecting the electrolyte into the battery and the operation of standing the electrolyte are completed, and the charging structure, the heating structure and the voltage regulation structure are matched respectively. And completing the operation steps of high-temperature negative-pressure pre-charging and high-temperature aging of the battery. The device is small in occupied space and simple and rapid in operation process.

Description

Technical Field

[0001] The utility model relates to the technical field of battery manufacturing, in particular to a battery formation device and system. Background Art

[0002] The battery formation manufacturing process includes battery filling, liquid absorption, pre-charging, aging and secondary liquid replenishment. When the battery is filled, the electrolyte needs to be injected into the battery casing. Generally, multiple batteries are arranged inside a bell-shaped device, and the battery environment is pressurized and negative pressure is drawn inside the device to accelerate the entry of electrolyte into the battery.

[0003] The disadvantages of the above battery filling method are that the equipment used in the battery filling process occupies a large space, the process turnover time is long, and the filling time is generally more than 40 minutes, which still takes a long time. Utility Model Content

[0004] In order to solve at least the above technical problems existing in the prior art, the embodiments of the present utility model provide a battery formation device and system.

[0005] One aspect of an embodiment of the utility model provides a battery formation device, including a clamp and a liquid storage structure; the clamp includes a chamber, and the battery and the liquid storage structure are arranged in the chamber; the liquid storage structure includes an injection port, a liquid outlet and a pressure regulating port, the injection port is used to connect to a pumping structure to pump electrolyte into the liquid storage structure, the liquid outlet is connected to the battery, the electrolyte in the liquid storage structure is injected into the battery via the liquid outlet, and the pressure regulating port is used to connect to the pressure regulating structure to adjust the pressure in the liquid storage structure when the electrolyte is injected into the battery and when the electrolyte is left at rest.

[0006] In some embodiments, the chamber includes a first chamber and a second chamber, the first chamber is located above the second chamber; the first chamber and the second chamber are connected, the liquid storage structure is located in the first chamber, and the second chamber is used to accommodate the battery.

[0007] In some embodiments, the first chamber and the second chamber are connected via a liquid injection nozzle, and the liquid outlet of the liquid storage structure is connected to the liquid injection nozzle.

[0008] In some embodiments, a charging structure is further provided in the second chamber, and the battery is connected to the charging structure, and the charging structure is used to perform a pre-charging operation on the battery.

[0009] In some embodiments, the charging structure is located on a side of the battery away from the first chamber; the liquid storage structure is connected to one end of the battery, and the charging structure is connected to the other end of the battery.

[0010] In some embodiments, a heating structure is further included, wherein the heating structure is used to heat the second chamber.

[0011] In some embodiments, the heating structure comprises an annular heating jacket located on an inner wall of the second chamber.

[0012] The embodiment of the utility model further provides a battery formation system, comprising the above-mentioned battery formation equipment.

[0013] In some embodiments, a pumping structure and a pressure regulating structure are further included, wherein the pumping structure is connected to the liquid injection port, and the pressure regulating structure is connected to the pressure regulating port.

[0014] In some embodiments, the liquid storage structure includes a plurality of the pressure regulating ports, and the pressure regulating structure includes a positive pressure generator and a negative pressure generator, and the positive pressure generator and the negative pressure generator are respectively connected to the pressure regulating ports.

[0015] The battery formation equipment and system provided by the embodiment of the utility model, during the liquid injection operation, electrolyte is added to the liquid storage structure through the liquid injection port, and then the pressure of the environment of the liquid storage structure is adjusted through the pressure regulating port, and the electrolyte quickly enters the battery through the liquid outlet by alternating positive and negative pressures. The technical solution of the utility model can complete the liquid injection operation by adjusting the pressure of the fixture chamber, and there is no need to design an additional bell-shaped device for pressure regulation. The equipment occupies a small space and the operation process is simple and fast. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] By reading the detailed description below with reference to the accompanying drawings, the above and other objects, features and advantages of the exemplary embodiments of the present invention will become readily understood. In the accompanying drawings, several embodiments of the present invention are shown in an exemplary and non-limiting manner, wherein:

[0017] In the drawings, the same or corresponding reference numerals represent the same or corresponding parts.

[0018] Figure 1 is a cross-sectional view of a battery formation device provided by an embodiment of the utility model;

[0019] Figure 2 The battery formation equipment provided by the utility model embodiment is a performance test of the battery formed Figure 1 ;

[0020] Figure 3 The battery formation equipment provided by the utility model provides a performance test of the battery formed Figure 2 .

[0021] In the figure:

[0022] 10: fixture;

[0023] 11: liquid storage structure; 111: liquid injection port; 112: liquid outlet; 113: pressure regulating port; 12: battery; 13: first chamber; 14: second chamber; 15: liquid injection nozzle; 16: charging structure; 17: heating structure. DETAILED DESCRIPTION

[0024] In order to make the purpose, features and advantages of the utility model more obvious and easy to understand, the technical solutions in the embodiments of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of them. Based on the embodiments of the utility model, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the utility model.

[0025] The embodiment of the utility model provides a battery formation device, including a clamp and a liquid storage structure. The clamp is used to connect the battery and the liquid storage structure. The battery filling, standing, high-temperature negative pressure pre-charging and high-temperature aging operations are completed on the clamp. For the battery formation operation, a separate clamp device can be used.

[0026] The following is a detailed description of the various structures of the battery formation equipment and system provided by the embodiments of the present invention, as well as the positional relationship and connection relationship between the various structures, in conjunction with the accompanying drawings.

[0027] like Figure 1 As shown, the fixture 10 includes a chamber, and the battery 12 and the liquid storage structure 11 are arranged in the chamber. When injecting liquid, a fixture 10 is configured for each battery 12, and the fixture 10 is configured with a liquid storage structure 11. By changing the pressure of the liquid storage structure 11 in the fixture 10, the rapid injection operation of the battery 12 can be completed. The difference from the existing injection method is that there is no need to set up a bell-shaped device, that is, there is no need to use large equipment to change the pressure of the environment where the battery 12 is located, the injection equipment occupies a smaller space, and the injection and static operation procedures are simpler and faster.

[0028] Continue to refer Figure 1 As shown, in the embodiment of the utility model, the chamber includes a first chamber 13 and a second chamber 14, and the first chamber 13 is located above the second chamber 14; the first chamber 13 and the second chamber 14 are connected, the liquid storage structure 11 is located in the first chamber 13, and the second chamber 14 is used to accommodate the battery 12.

[0029] The liquid storage structure 11 is arranged in the first chamber 13. The liquid storage structure 11 and the first chamber 13 can be detachably connected or fixedly connected. The clamp 10 on the periphery of the second chamber 14 is a docking structure. The two are docked to form the second chamber 14. When the docking structure is separated, it is used to place the battery 12; alternatively, a cover body is set at the bottom of the second chamber 14, and the battery 12 is taken in and placed in the second chamber 14 by opening and closing the cover body.

[0030] For example, the first chamber 13 and the second chamber 14 are connected via the liquid injection nozzle 15 , and the liquid outlet 112 of the liquid storage structure 11 is connected to the liquid injection nozzle 15 .

[0031] In an embodiment of the utility model, the liquid storage structure 11 includes a liquid injection port 111, a liquid outlet 112 and a pressure regulating port 113. The liquid injection port 111 is used to connect to a pumping structure to pump electrolyte into the liquid storage structure 11. The liquid outlet 112 is connected to the battery 12, and the electrolyte in the liquid storage structure 11 is injected into the battery 12 via the liquid outlet 112. The pressure regulating port 113 is used to connect to a pressure regulating structure to adjust the pressure in the liquid storage structure 11.

[0032] An inlet is provided on the fixture 10, and the inlet is connected to the liquid injection port 111 of the liquid storage structure 11. For example, the liquid storage structure 11 is a liquid storage cup, and the liquid injection port 111 is provided on the top of the liquid storage cup, and the liquid outlet 112 is provided on the bottom. For example, an inverted cone-shaped guide structure is provided at the bottom of the liquid storage cup, and the guide structure collects the electrolyte in the liquid storage cup to the liquid storage port, and finally injects it into the battery 12.

[0033] During the injection operation, the electrolyte outside the fixture 10 is pumped into the liquid storage cup through the inlet and the injection port 111 by using the pumping structure, and the injection operation of the liquid storage cup is completed. The subsequent static operation is divided into two stages, the first stage is the electrolyte injection stage into the battery 12, and the second stage is the electrolyte static stage.

[0034] In the first stage, the pressure regulating structure regulates the pressure in the liquid storage cup, wherein the pressure regulating structure includes a positive pressure generator and a negative pressure generator, and the two generators are used to regulate the pressure in an alternating positive and negative pressure manner to enable the electrolyte to quickly enter the battery 12. For example, the pressure value during positive pressure is 0.6Mpa to 1.0Mpa, and the pressure value during negative pressure is -50Kpa to -80Kpa. For example, the alternation frequency is once every 3 minutes or 5 minutes. The duration of the first stage can be controlled within 30 minutes.

[0035] In the second stage, the pressure value during positive pressure is 0.6Mpa to 1.0Mpa, and the pressure value during negative pressure is -50Kpa to -80Kpa, and the alternation frequency is 1-2 hours. The operation of charging the battery 12 with positive pressure can cause gaps to appear between the electrodes inside the battery 12, facilitating the infiltration of the electrolyte. The operation of pumping negative pressure into the battery 12 can cause the electrolyte at the bottom of the battery 12 to flow with the gas when the negative pressure is pumped, and the electrolyte moves upward from the bottom of the battery 12, so that the electrodes at the upper and lower parts of the battery 12 are fully infiltrated.

[0036] Continue to refer Figure 1 As shown, in the embodiment of the utility model, a charging structure 16 is further provided in the second chamber 14 , and the battery 12 is connected to the charging structure 16 , and the charging structure 16 is used to perform a pre-charging operation on the battery 12 .

[0037] The battery 12 formation equipment further includes a heating structure 17 , and the heating structure 17 is used to heat the second chamber 14 .

[0038] For example, the charging structure 16 is located on a side of the battery 12 away from the first chamber 13; the liquid storage structure 11 is connected to one end of the battery 12, and the charging structure 16 is connected to the other end of the battery 12. For example, the heating structure 17 includes an annular heating jacket, which is located on the inner wall of the second chamber 14.

[0039] After completing the injection and standing operations, a high-temperature negative pressure pre-charging operation can be performed. Specifically, the temperature environment is 45±5°C, and the negative pressure value is -30 to -50Kpa, which are controlled by the heating structure 17 and the voltage regulating structure respectively. After the environment meets the set requirements, the charging structure 16 in the second chamber 14, that is, the charging base, is used to charge the battery 12. For example, the pre-charging current is 0.02C in the first step and 0.1C in the second step.

[0040] In the embodiment of the utility model, the specific structure of the charging structure 16 is not limited, and it only needs to meet the pre-charging requirements. For example, the charging structure 16 is a charging adapter.

[0041] After completing the pre-charging operation, a high-temperature aging step is performed. Specifically, the temperature environment is 45±5°C, the aging time is 4-6 hours, and the positive and negative pressures are kept alternating. For example, the pressure value during positive pressure is 0.6Mpa to 1.0Mpa, and the pressure value during negative pressure is -50Kpa to -80Kpa. The alternation frequency is 1-2 hours. The aging step allows the battery 12 to complete the side reaction generated by the SEI film formed during pre-charging, and discharge the gas generated by the reaction.

[0042] Compared with the existing pre-charging operation and high-temperature aging steps, the operation is completed on the same fixture 10, and there is no need to move the battery 12 and set up a heating or voltage regulating structure. No additional process flow is required, which reduces material costs.

[0043] After the high temperature aging step, the battery 12 is taken out from the second chamber 14, and the injection hole of the battery 12 is sealed by laser welding with a sealing aluminum sheet. Finally, the capacity of the battery 12 is tested, thereby completing the manufacturing process of the battery 12 formation stage.

[0044] like Figure 2 and Figure 3 As shown, this is a performance test result diagram of battery 12. From the test results, it can be seen that the rate performance of battery 12 is excellent, and the discharge capacity retention rate of the cycle performance is above 90% after 1400 cycles, and it is expected that the discharge capacity retention rate can reach above 80% after 5000 cycles.

[0045] The embodiment of the utility model further provides a battery 12 formation system, comprising the above-mentioned battery 12 formation equipment, wherein the system comprises a pumping structure and a pressure regulating structure, wherein the pumping structure is connected to the liquid injection port 111 , and the pressure regulating structure is connected to the pressure regulating port 113 .

[0046] For example, the liquid storage structure 11 includes a plurality of pressure regulating ports 113 , and the pressure regulating structure includes a positive pressure generator and a negative pressure generator, and the positive pressure generator and the negative pressure generator are respectively connected to the pressure regulating ports 113 .

[0047] The battery 12 formation equipment and system provided by the embodiment of the utility model have the following advantages: the difficulty of the battery 12 injection process is reduced, the efficiency of the injection process is improved, the liquid absorption speed of the cylindrical battery 12 pole piece is improved, the static time is shortened, the production process is more flexible, the production capacity expansion is more convenient, the required space is small, and the factory space is saved. The pre-charging and aging steps do not require an additional high-temperature environment, which can save energy and reduce costs. The battery 12 is completed from injection to aging in the same fixture 10, and no additional process flow is required, which reduces material costs.

[0048] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" 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. 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 different embodiments or examples described in this specification and the features of different embodiments or examples, unless they are contradictory.

[0049] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of the features. In the description of the present utility model, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0050] The above are only specific implementations of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can easily think of changes or substitutions within the technical scope disclosed by the present invention, which should be included in the protection scope of the present invention. Therefore, the protection scope of the present invention should be based on the protection scope of the claims.

Claims

1. A battery formation device, characterized in that: It comprises a clamp (10) and a liquid storage structure (11); The fixture (10) includes a chamber, and the battery (12) and the liquid storage structure (11) are arranged in the chamber; The liquid storage structure (11) comprises a liquid injection port (111), a liquid outlet (112) and a pressure regulating port (113); the liquid injection port (111) is used to connect to a pumping structure so as to pump electrolyte into the liquid storage structure (11); the liquid outlet (112) is connected to the battery (12); the electrolyte in the liquid storage structure (11) is injected into the battery (12) via the liquid outlet (112); and the pressure regulating port (113) is used to connect to a pressure regulating structure so as to regulate the pressure in the liquid storage structure (11) when the electrolyte is injected into the battery and when the electrolyte is left standing.

2. The battery formation equipment according to claim 1, characterized in that: The chamber comprises a first chamber (13) and a second chamber (14), wherein the first chamber (13) is located above the second chamber (14); The first chamber (13) and the second chamber (14) are connected, the liquid storage structure (11) is located in the first chamber (13), and the second chamber (14) is used to accommodate the battery (12).

3. The battery formation equipment according to claim 2, characterized in that: The first chamber (13) and the second chamber (14) are connected via a liquid injection nozzle (15), and the liquid outlet (112) of the liquid storage structure (11) is connected to the liquid injection nozzle (15).

4. The battery formation equipment according to claim 2, characterized in that: A charging structure (16) is also provided in the second chamber (14), the battery (12) is connected to the charging structure (16), and the charging structure (16) is used to perform a pre-charging operation on the battery (12).

5. The battery formation equipment according to claim 4, characterized in that: The charging structure (16) is located on a side of the battery (12) away from the first chamber (13); The liquid storage structure (11) is connected to one end of the battery (12), and the charging structure (16) is connected to the other end of the battery (12).

6. The battery formation equipment according to claim 2, characterized in that: It also comprises a heating structure (17), wherein the heating structure (17) is used to heat the second chamber (14).

7. The battery formation equipment according to claim 6, characterized in that: The heating structure (17) comprises an annular heating jacket, which is located on the inner wall of the second chamber (14).

8. A battery formation system, characterized in that: Comprising the battery formation equipment as claimed in any one of claims 1 to 7.

9. The battery formation system according to claim 8, characterized in that: It also comprises a pumping structure and a pressure regulating structure, wherein the pumping structure is connected to the liquid injection port (111), and the pressure regulating structure is connected to the pressure regulating port (113).

10. The battery formation system according to claim 9, characterized in that: The liquid storage structure comprises a plurality of pressure regulating ports (113), and the pressure regulating structure comprises a positive pressure generator and a negative pressure generator, wherein the positive pressure generator and the negative pressure generator are respectively connected to the pressure regulating ports (113).

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