Electrode assembly hot-pressing equipment

Abstract

The utility model belongs to the technical field of electrode assembly production, and particularly relates to electrode assembly hot-pressing equipment which comprises two hot-pressing devices used for performing hot-pressing on a to-be-shaped electrode assembly in the first direction, each hot-pressing device comprises a base frame and a plurality of hot-pressing mechanisms, and each hot-pressing mechanism comprises a pressurizing module installed on the base frame, the surface of the electrode assembly is pressed against and extruded; the heating module is mounted on the pressurizing module and used for heating the pressurizing module; the induction detection module is mounted on the pressurization module and is used for inducting the surface size and the surface temperature of the measurement electrode assembly; the hot-pressing device has the beneficial effects that the hot-pressing device consists of a plurality of hot-pressing mechanisms capable of working independently, and can be used for carrying out independent hot-pressing on each part of a large surface of the electrode assembly, so that the hot-pressing uniformity among different parts of the electrode assembly is ensured, the tightness of each position of a pole piece of the electrode assembly is ensured, and the battery performance is improved; and energy can be reasonably distributed, resource waste is effectively reduced, and economic benefits are improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of battery production, and in particular relates to a hot pressing device for an electrode assembly. Background Art

[0002] The electrode assembly is the main component inside the battery, usually composed of a positive electrode, a negative electrode and a separator wound in a specific order. The electrode assembly is often in a fluffy state after being formed, and most of them need to be hot pressed and formed.

[0003] In the prior art, the hot pressing component of most hot pressing equipment is a hot pressing block composed of a whole large surface. During the hot pressing process, the whole hot pressing block performs hot pressing operations on the electrode assembly. However, since the thickness of each area of ​​the wound electrode assembly is different, using a hot pressing block composed of a whole large surface to hot press the electrode assembly will cause the actual pressure on each area of ​​the electrode assembly to be different, which may easily cause the positive and negative electrodes in the local area of ​​the electrode assembly to not be pressed tightly together, resulting in affected battery performance. Utility Model Content

[0004] The purpose of the present invention is to provide an electrode assembly hot pressing device to solve the above-mentioned technical problems.

[0005] In view of this, the present invention provides an electrode assembly hot pressing device, comprising two hot pressing devices, the two hot pressing devices being used to hot press the electrode assembly to be shaped along a first direction, the hot pressing device comprising a base frame and a plurality of hot pressing mechanisms, each of the plurality of hot pressing mechanisms comprising:

[0006] A pressurizing module is installed on the base frame and is used to abut against and squeeze the surface of the electrode assembly;

[0007] A heating module is installed on the pressurizing module and is used to heat the pressurizing module;

[0008] The induction detection module is installed on the pressurizing module and is used to sense and measure the surface size and surface temperature of the electrode assembly.

[0009] Furthermore, the pressurizing module includes:

[0010] The pressing block is movably arranged on the base frame along a first direction and is used for abutting and pressing the surface of the electrode assembly.

[0011] Furthermore, the pressurizing module further includes:

[0012] The driving member is arranged on the base frame and is used to drive the pressing block to move along the first direction.

[0013] Furthermore, the driving member is an electric hydraulic push rod.

[0014] Furthermore, the pressurizing module further includes:

[0015] The pressure sensor is installed on the pressing block and is used to sense and measure the pressure applied by the pressing block to the electrode assembly.

[0016] Furthermore, the heating module also includes:

[0017] The temperature sensor is installed on the pressurizing module and is used to monitor the hot pressing temperature of the pressurizing module in real time.

[0018] Furthermore, it also includes:

[0019] The central control machine is connected to several hot pressing mechanisms in communication.

[0020] Furthermore, the detection module includes:

[0021] The size detection unit is installed on the pressing block and is used to sense and detect the surface size of the electrode assembly.

[0022] Furthermore, the detection module also includes:

[0023] The temperature detection unit is installed on the pressing block and is used to sense and detect the surface temperature of the electrode assembly.

[0024] Furthermore, the size detection unit is an infrared optical sensor, and the temperature detection unit is an infrared temperature sensor.

[0025] The beneficial effects of the utility model are:

[0026] This hot pressing equipment utilizes two hot pressing devices, one for each of the two large surfaces of the electrode assembly. The hot pressing devices, comprised of multiple independently functioning hot pressing mechanisms, can individually hot press various locations on the large surface of the electrode assembly, ensuring uniform hot pressing across different parts of the electrode assembly and tight fit across all electrode plates, thereby improving battery performance. It also rationally allocates energy, effectively reducing resource waste and increasing economic efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 It is a structural diagram of the existing hot pressing equipment in the background technology of the present utility model;

[0028] Figure 2 It is a structural diagram of the utility model;

[0029] Figure 3 It is a schematic diagram of the structure of the utility model when it is working;

[0030] The marks in the figure are:

[0031] 1. Pressurizing module; 11. Pressing block; 12. Driving element; 2. Heating module; 3. Induction detection module; Z, first direction. DETAILED DESCRIPTION

[0032] The following will be combined with the accompanying drawings in the embodiments of this application to clearly describe the technical solutions in the embodiments of this application. Obviously, the described embodiments are part of the embodiments of this application, not all of the embodiments. Based on the embodiments of this application, all other embodiments obtained by ordinary technicians in this field without making any creative work are within the scope of protection of this application.

[0033] In the description of this application, it should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to this application. For ease of description, the sizes of the various parts shown in the drawings are not drawn according to the actual proportional relationship. The techniques, methods and equipment known to ordinary technicians in the relevant fields may not be discussed in detail, but where appropriate, the techniques, methods and equipment should be considered as part of the authorization specification. In all examples shown and discussed here, any specific values ​​should be interpreted as merely exemplary and not as limitations. Therefore, other examples of the exemplary embodiments may have different values. It should be noted that similar numbers and letters represent similar items in the following figures, so once an item is defined in one figure, it does not need to be further discussed in subsequent figures.

[0034] Example 1:

[0035] This embodiment provides an electrode assembly hot pressing device, comprising two hot pressing devices, which are used to hot press the electrode assembly to be shaped along a first direction Z. The hot pressing device comprises a base frame and several hot pressing mechanisms, each of which comprises:

[0036] A pressurizing module 1 is mounted on the base frame and is used to press the surface of the electrode assembly along a first direction Z;

[0037] Heating module 2, which is installed on the pressurizing module 1 and is used to heat the pressurizing module 1;

[0038] The induction detection module 3 is installed on the pressurizing module 1 and is used to induction measure the surface size and surface temperature of the electrode assembly.

[0039] In this technical solution, as shown in the figure, the electrode assembly to be hot-pressed and shaped is placed between two hot-pressing devices, which are respectively located above and below the electrode assembly. The control system controls the two hot-pressing devices to work, and each heating module 2 heats each pressurizing module 1 to a specified temperature. Then, each pressurizing module 1 performs hot pressing on the surface of the electrode assembly separately along the first direction Z. Each pressurizing module 1 corresponds to a different part of the hot-pressed electrode assembly, and each pressurizing module 1 will form an enclosed space, so that the electrode assembly is located in the sealed space, thereby ensuring that each part is heated evenly, especially the electrode pieces at the rounded corners of the electrode assembly, which could only be heated by heat conduction inside the electrode assembly. Now, they can be directly contacted with the pressurizing module 1 for heating, effectively ensuring that the electrode pieces at the rounded corners of the electrode assembly can be fully fitted.

[0040] In addition, different pressures are applied to different parts of the electrode assembly to ensure that the electrode sheets at various positions inside the electrode assembly are in close contact. During the hot pressing process, the induction detection module 3 on each hot pressing mechanism will sense and measure the thickness of the corresponding electrode assembly part to assess whether the thickness of the electrode assembly is qualified.

[0041] In summary, the hot pressing equipment utilizes two hot pressing devices, one for each of the two large surfaces of the electrode assembly. The hot pressing devices, comprised of multiple independently functioning hot pressing mechanisms, can perform separate hot pressing on each portion of the electrode assembly's large surface, ensuring uniform hot pressing across different parts of the electrode assembly and tight fit across all electrode sheet locations, thereby improving battery performance. Furthermore, it rationally allocates energy, effectively reducing resource waste and increasing economic efficiency.

[0042] Example 2:

[0043] This embodiment provides an electrode assembly hot pressing device, which, in addition to the technical solutions of the above embodiments, also has the following technical features.

[0044] Furthermore, the pressurizing module 1 includes:

[0045] A pressing block 11 is movably disposed on the base frame along a first direction Z and is used to abut against and press the surface of the electrode assembly;

[0046] The driving member 12 is disposed on the base frame and is used to drive the pressing block 11 to move along the first direction Z.

[0047] Furthermore, the driving member 12 is an electric hydraulic push rod.

[0048] In this technical solution, when hot pressing is performed, the heating module 2 heats the pressing block 11 to a specified temperature, and the driving member 12 can be an electric hydraulic push rod, which is installed and fixed on the base frame. Each electric hydraulic push rod pushes the corresponding pressing block 11 to move along the first direction Z and abut against the surface of the electrode assembly, thereby realizing hot pressing shaping of the electrode assembly.

[0049] Example 3:

[0050] This embodiment provides an electrode assembly hot pressing device, which, in addition to the technical solutions of the above embodiments, also has the following technical features.

[0051] Furthermore, the pressurizing module 1 further includes:

[0052] The pressure sensor is installed on the pressing block 11 and is used to sense and measure the pressure applied by the pressing block 11 to the electrode assembly.

[0053] In this technical solution, by setting up a pressure sensor, the pressure applied by the pressure block 11 to the electrode assembly can be measured and fed back to the control system. The control system adjusts the output pressure of the electric hydraulic push rod according to the pressure feedback from the pressure sensor to ensure that the force at different positions of the electrode assembly is appropriate and to ensure the tight fit of the internal electrodes of the electrode assembly.

[0054] Example 4:

[0055] This embodiment provides an electrode assembly hot pressing device, which, in addition to the technical solutions of the above embodiments, also has the following technical features.

[0056] Furthermore, the heating module 2 further includes:

[0057] The temperature sensor is installed on the pressurizing module 1 and is used to monitor the hot pressing temperature of the pressurizing module 1 in real time.

[0058] In this technical solution, by setting a temperature sensor, the temperature of the pressing block 11 can be monitored and measured in real time and fed back to the control system. The control system adjusts the heating power of the heating module 2 according to the temperature value fed back by the temperature sensor to ensure that the temperature of the pressing block 11 is at a predetermined temperature and to ensure that the electrode assembly is fully hot-pressed.

[0059] Example 5:

[0060] This embodiment provides an electrode assembly hot pressing device, which, in addition to the technical solutions of the above embodiments, also has the following technical features.

[0061] Furthermore, it also includes:

[0062] A central control machine is communicatively connected with a plurality of hot pressing mechanisms.

[0063] In this technical solution, several control buttons are provided on the human-machine interface of the central control machine, which correspond to several hot pressing mechanisms. The staff can control the various hot pressing mechanisms of the hot pressing equipment to perform hot pressing operations on different parts of the electrode assembly by operating the central control machine, which is simple and convenient.

[0064] Example 6:

[0065] This embodiment provides an electrode assembly hot pressing device, which, in addition to the technical solutions of the above embodiments, also has the following technical features.

[0066] Furthermore, the sensing detection module includes:

[0067] The size detection unit is installed on the pressing block 11 and is used to sense and detect the surface size of the electrode assembly.

[0068] Furthermore, the sensing detection module also includes:

[0069] The temperature detection unit is installed on the pressing block 11 and is used to sense and detect the surface temperature of the electrode assembly.

[0070] In this technical solution, the dimension detection unit may be an infrared optical sensor that detects the thickness of the electrode assembly in the corresponding compressed area to assess whether the thickness of the electrode assembly in the compressed area is excessive. The temperature detection unit may be an infrared temperature sensor that measures the temperature of the compressed area of ​​the electrode assembly to ensure uniform heating across all areas of the electrode assembly.

[0071] The embodiments of the present application are described above in conjunction with the accompanying drawings. Unless there is a conflict, the embodiments and features in the embodiments of the present application can be combined with each other. The present application is not limited to the above-mentioned specific implementation methods. The above-mentioned specific implementation methods are merely illustrative and not restrictive. Under the guidance of this application, ordinary technicians in this field can also make many forms without departing from the purpose of this application and the scope of protection of the claims, all of which are within the protection of this application.

Claims

1. An electrode assembly hot pressing device, characterized in that: The invention comprises two hot pressing devices, which are used to hot press the electrode assembly to be shaped along the first direction (Z). The hot pressing device comprises a base frame and several hot pressing mechanisms, and the several hot pressing mechanisms each comprise: A pressurizing module (1), the pressurizing module (1) being mounted on a base frame and used for abutting against and squeezing a surface of the electrode assembly; A heating module (2), the heating module (2) being mounted on the pressurizing module (1) and being used to heat the pressurizing module (1); An induction detection module (3) is installed on the pressurizing module (1) and is used for induction measurement of the surface size and surface temperature of the electrode assembly.

2. The electrode assembly hot pressing equipment according to claim 1, characterized in that: The pressurizing module (1) comprises: A pressing block (11) is movably arranged on a base frame along a first direction (Z) and is used for abutting and pressing the surface of the electrode assembly.

3. The electrode assembly hot pressing equipment according to claim 2, characterized in that: The pressurizing module (1) further comprises: A driving member (12) is provided on the base frame and is used for driving the pressing block (11) to move along a first direction (Z).

4. The electrode assembly hot pressing equipment according to claim 3, characterized in that: The driving member (12) is an electric hydraulic push rod.

5. The electrode assembly hot pressing equipment according to claim 2, characterized in that: The pressurizing module (1) further comprises: A pressure sensor is mounted on the pressing block (11) and is used to sense and measure the pressure applied by the pressing block (11) to the electrode assembly.

6. The electrode assembly hot pressing equipment according to claim 1, characterized in that: The heating module (2) further comprises: A temperature sensor is installed on the pressurizing module (1) and is used to monitor the hot pressing temperature of the pressurizing module (1) in real time.

7. The electrode assembly hot pressing equipment according to claim 1, characterized in that: Also includes: A central control machine is communicatively connected with a plurality of hot pressing mechanisms.

8. The electrode assembly hot pressing equipment according to claim 2, characterized in that: The induction detection module (3) comprises: A size detection unit is installed on the pressing block (11) and is used for sensing and detecting the surface size of the electrode assembly.

9. The electrode assembly hot pressing equipment according to claim 8, characterized in that: The induction detection module (3) further comprises: A temperature detection unit is installed on the pressing block (11) and is used for sensing and detecting the surface temperature of the electrode assembly.

10. The electrode assembly hot pressing equipment according to claim 9, characterized in that: The size detection unit is an infrared optical sensor, and the temperature detection unit is an infrared temperature sensor.

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