Pole piece coating die head and coating device

Abstract

The utility model discloses a pole piece coating die head and a coating device, and belongs to the technical field of battery processing. The pole piece coating die head comprises a die head assembly, a first gasket and a second gasket, the die head assembly comprises a lower die, a middle die and an upper die which are sequentially arranged from bottom to top, a lower-layer die cavity is formed between the lower die and the middle die, and an upper-layer die cavity is formed between the middle die and the upper die; the first gasket is arranged in the lower-layer mold cavity, and a first liquid outlet channel is formed in the first gasket; the second gasket is arranged in the upper-layer mold cavity, two second liquid outlet channels are formed in the second gasket, and the two second liquid outlet channels are located on the two sides of the first liquid outlet channel correspondingly. According to the pole piece coating die head, the coating efficiency can be improved, the coating cost can be reduced, and the production requirements of pole pieces can be met.

Description

Technical Field

[0001] This utility model relates to the field of battery processing technology, specifically to an electrode coating die and coating device. Background Technology

[0002] Lithium-ion batteries are widely used in mobile electronic devices such as Bluetooth headsets, mobile phones, laptops, tablets, and cameras, as well as portable power banks, due to their advantages such as light weight and good safety performance.

[0003] The production process of lithium-ion batteries typically includes electrode coating. During positive electrode coating, a binder (a mixture of burlite, binder, and solvent) needs to be applied to both sides of the positive electrode slurry to prevent short circuits caused by direct contact between the positive and negative electrodes. In related technologies, the method for coating the positive electrode involves using a coating machine die to coat the positive electrode slurry onto the foil, while the binder on both sides of the positive electrode slurry is sprayed onto the foil using a glue applicator. The glue applicator's tube is filled with binder and continuously applied to the foil. However, this coating method cannot achieve intermittent coating, resulting in binder waste and the risk of coating into the gaps between the electrodes, failing to meet electrode production requirements. Furthermore, this coating method requires two separate pieces of equipment, leading to low coating efficiency and increased coating costs.

[0004] Therefore, there is an urgent need for an electrode coating die and coating device to solve the above problems. Utility Model Content

[0005] The purpose of this invention is to solve or at least alleviate some or all of the aforementioned problems. Therefore, the purpose of this invention is to provide an electrode coating die and coating apparatus that can improve coating efficiency, reduce coating costs, and meet the production needs of electrode sheets.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] An electrode coating die head, comprising:

[0008] The mold head assembly includes a lower mold, a middle mold, and an upper mold arranged sequentially from bottom to top, wherein a lower mold cavity is formed between the lower mold and the middle mold, and an upper mold cavity is formed between the middle mold and the upper mold;

[0009] A first gasket is disposed in the lower mold cavity, and a first liquid outlet channel is provided on the first gasket;

[0010] The second gasket is disposed in the upper mold cavity. The second gasket has two second liquid outlet channels, which are respectively located on both sides of the first liquid outlet channel.

[0011] As a preferred embodiment of the electrode coating die provided by this utility model, the first gasket includes a first base and two first connecting portions respectively connected to both ends of the first base, and the interval between the two first connecting portions forms the first liquid outlet channel.

[0012] As a preferred embodiment of the electrode coating die provided by this utility model, the second gasket includes a second base, a second connecting portion and an intermediate mating portion. The two second connecting portions are respectively connected to the two ends of the second base. The intermediate mating portion is connected to the second base and located between the two second connecting portions. The interval between the intermediate mating portion and the two second connecting portions forms the second liquid outlet channel.

[0013] As a preferred embodiment of the electrode coating die head provided by this utility model, the first gasket is detachably installed in the lower die cavity; and / or

[0014] The second gasket is detachably installed in the upper mold cavity.

[0015] As a preferred embodiment of the electrode coating die head provided by this utility model, the first gasket is provided with a first fixing hole, and a first fastener passes through the first fixing hole and is connected to the lower die and / or the middle die; and / or

[0016] The second gasket is provided with a second fixing hole, and the second fastener passes through the second fixing hole and is connected to the upper mold and / or the middle mold.

[0017] As a preferred embodiment of the electrode coating die head provided by this utility model, the middle die includes a first surface and a second surface arranged at an angle, the first surface and the second surface intersect to form an intersection line, the first surface forms the upper cavity wall of the lower mold cavity, and the second surface forms the lower cavity wall of the upper mold cavity.

[0018] As a preferred embodiment of the electrode coating die head provided by this utility model, the lower die and / or the middle die are provided with a first feeding channel communicating with the lower die cavity, and the first feeding channel is connected to a slurry supply device; and / or

[0019] The upper mold and / or the middle mold are provided with a second feeding channel that communicates with the upper mold cavity, and the second feeding channel is connected to the adhesive supply device.

[0020] As a preferred embodiment of the electrode coating die head provided by this utility model, the lower die is rotatably connected to the middle die; and / or

[0021] The upper mold and the middle mold are rotatably connected.

[0022] As a preferred embodiment of the electrode coating die head provided by this utility model, the middle die is provided with a hinge base at one end opposite to the first liquid outlet channel, the lower die is provided with a first hinge seat at one end opposite to the first liquid outlet channel, and the first hinge seat is rotatably connected to the hinge base through a first hinge shaft; the upper die is provided with a second hinge seat at one end opposite to the first liquid outlet channel, and the second hinge seat is rotatably connected to the hinge base through a second hinge shaft.

[0023] This utility model also provides a coating device, comprising:

[0024] frame;

[0025] An unwinding mechanism is provided on the frame. The unwinding mechanism includes an unwinding assembly and a winding assembly. The unwinding assembly is used to unwind the electrode strip, and the winding assembly is used to wind up the coated electrode strip.

[0026] The coating roller is rotatably mounted on the frame and located between the unwinding assembly and the winding assembly;

[0027] As described above, in the electrode coating die head, both the first liquid outlet channel and the second liquid outlet channel of the electrode coating die head are oriented toward the coating roller, so as to apply coating slurry and adhesive to the electrode material strip passing through the coating roller.

[0028] The beneficial effects of this utility model are as follows:

[0029] The electrode coating die head provided by this utility model allows for the following process: during operation, positive electrode slurry is introduced into the lower die cavity, and adhesive is introduced into the upper die cavity. The positive electrode slurry in the lower die cavity can flow out through the first liquid outlet channel and coat the coating area of ​​the positive electrode sheet. The adhesive in the upper die cavity can flow out through two second liquid outlet channels and coat both sides of the coating area, thereby realizing the coating process of the positive electrode sheet. By using the electrode coating die head, simultaneous and intermittent coating of positive electrode slurry and adhesive on the positive electrode sheet can be achieved. This satisfies the needs of electrode sheet production while avoiding waste of adhesive, improving coating efficiency, and reducing coating costs.

[0030] The coating apparatus provided by this utility model can improve coating efficiency, reduce coating cost, and meet the production needs of electrode sheets by applying the above-mentioned electrode coating die head. Attached Figure Description

[0031] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of the embodiments of this utility model will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the content of the embodiments of this utility model and these drawings without creative effort.

[0032] Figure 1 This is a schematic diagram of the structure of the electrode coating die provided in this embodiment of the utility model;

[0033] Figure 2 yes Figure 1 A magnified view of a portion at point A;

[0034] Figure 3 This is a schematic diagram of the structure of the first gasket provided in this embodiment of the utility model;

[0035] Figure 4 This is a schematic diagram of the structure of the second gasket provided in this embodiment of the present invention;

[0036] Figure 5 This is a schematic diagram of the structure of the coated electrode strip provided in this embodiment of the present invention;

[0037] Figure 6 This is a schematic diagram of the coating device provided in an embodiment of the present invention.

[0038] Figure label:

[0039] 1000, Positive electrode sheet; 1001, Coating area; 1002, Adhesive solution area;

[0040] 2000, electrode material strip;

[0041] 100. Electrode coating die head;

[0042] 110. Die head assembly; 1101. Lower mold cavity; 1102. Upper mold cavity; 1103. First feed channel; 1104. Second feed channel; 111. Lower mold; 112. Middle mold; 1121. First surface; 1122. Second surface; 113. Upper mold;

[0043] 120. First gasket; 1201. First liquid outlet channel; 121. First base; 1211. First fixing hole; 122. First connecting part;

[0044] 130. Second gasket; 1301. Second liquid outlet channel; 131. Second base; 1311. Second fixing hole; 132. Second connecting part; 133. Intermediate mating part;

[0045] 141. First hinge seat; 142. Second hinge seat; 143. Hinge base; 144. First hinge shaft; 145. Second hinge shaft;

[0046] 200. Rack;

[0047] 310. Unwind assembly; 320. Rewind assembly;

[0048] 400. Coating roller. Detailed Implementation

[0049] Before explaining any embodiment of the present invention in detail, it should be understood that the present invention is not limited to its application to the structural details and component arrangements set forth in the following description or shown in the above drawings.

[0050] In this invention, the terms "comprising," "including," "having," or any other variations thereof are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes that element.

[0051] In this invention, the term "and / or" describes the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent three situations: A exists alone, A and B exist simultaneously, and B exists alone. Additionally, in this invention, the character " / " generally indicates that the preceding and following related objects have an "and / or" relationship.

[0052] In this invention, the terms "connection," "combination," "coupling," and "installation" can refer to direct connection, combination, coupling, or installation, or indirect connection, combination, coupling, or installation. For example, a direct connection refers to two parts or components being connected together without the need for an intermediary, while an indirect connection refers to two parts or components each being connected to at least one intermediary, with the connection achieved through the intermediary. Furthermore, "connection" and "coupling" are not limited to physical or mechanical connections or couplings, but can also include electrical connections or couplings.

[0053] In this invention, those skilled in the art will understand that relative terms (e.g., “about,” “approximately,” “basically,” etc.) used in conjunction with quantities or conditions are to include the value and have the meaning indicated by the context. For example, such relative terms include at least the degree of error associated with the measurement of a particular value, tolerances associated with the particular value due to manufacturing, assembly, use, etc. Such terms should also be considered as disclosing a range defined by the absolute values ​​of the two endpoints. Relative terms may refer to a certain percentage (e.g., 1%, 5%, 10% or more) of the indicated value. Numerical values ​​not using relative terms should also be disclosed as specific values ​​with tolerances. Furthermore, “basically” when expressing relative angular relationships (e.g., substantially parallel, substantially perpendicular) may refer to a certain degree (e.g., 1 degree, 5 degrees, 10 degrees or more) added to or subtracted from the indicated angle.

[0054] In this invention, those skilled in the art will understand that the function performed by a component can be performed by one component, multiple components, one part, or multiple parts. Similarly, the function performed by a part can be performed by one part, one component, or a combination of multiple parts.

[0055] In this utility model, the directional terms "upper," "lower," "left," "right," "front," and "rear" are used to describe the orientation and positional relationships shown in the accompanying drawings and should not be construed as limiting the embodiments of this utility model. Furthermore, in the context, it should be understood that when one element is mentioned as being connected "upper" or "lower" to another element, it can be directly connected to the other element "upper" or "lower," or indirectly connected through an intermediate element. It should also be understood that directional terms such as upper side, lower side, left side, right side, front side, and rear side not only represent the direct orientation but can also be understood as the lateral orientation. For example, "below" can include directly below, lower left, lower right, lower front, and lower rear.

[0056] Figure 1 A schematic diagram of the structure of the electrode coating die head 100 provided in this embodiment is shown. Figure 2 It shows Figure 1 A magnified view of a portion at point A. Figure 3 A schematic diagram of the structure of the first gasket 120 provided in this embodiment is shown. Figure 4 A schematic diagram of the structure of the second gasket 130 provided in this embodiment is shown. Figures 1-4As shown, this embodiment provides an electrode coating die head 100, which includes a die head assembly 110, a first gasket 120, and a second gasket 130. The die head assembly 110 includes a lower die 111, a middle die 112, and an upper die 113 arranged sequentially from bottom to top. A lower die cavity 1101 is formed between the lower die 111 and the middle die 112, and an upper die cavity 1102 is formed between the middle die 112 and the upper die 113. The first gasket 120 is disposed in the lower die cavity 1101, and a first liquid outlet channel 1201 is provided on the first gasket 120. The second gasket 130 is disposed in the upper die cavity 1102, and two second liquid outlet channels 1301 are provided on the second gasket 130, which are respectively located on both sides of the first liquid outlet channel 1201.

[0057] Figure 5 A schematic diagram of the structure of the coated electrode strip 2000 provided in this embodiment is shown. Figure 5 and combined Figures 1-4 As shown, when the electrode coating die 100 is working, positive electrode slurry is introduced into the lower die cavity 1101 and adhesive is introduced into the upper die cavity 1102. The positive electrode slurry in the lower die cavity 1101 can flow out through the first liquid outlet channel 1201 and be coated on the coating area 1001 of the positive electrode 1000. The adhesive in the upper die cavity 1102 can flow out through the two second liquid outlet channels 1301 and be coated on both sides of the coating area 1001 to form the adhesive area 1002, thereby realizing the coating process of the positive electrode 1000. By using the electrode coating die 100, the positive electrode slurry and adhesive can be coated simultaneously and alternately on the positive electrode 1000. While meeting the needs of electrode production, the waste of adhesive is avoided, the coating efficiency is improved, and the coating cost is reduced.

[0058] like Figures 1-4 As shown, the lower mold 111 and / or the middle mold 112 are provided with a first feeding channel 1103 connected to the lower mold cavity 1101, and the first feeding channel 1103 is connected to the slurry supply device; the upper mold 113 and / or the middle mold 112 are provided with a second feeding channel 1104 connected to the upper mold cavity 1102, and the second feeding channel 1104 is connected to the adhesive supply device. That is to say, the slurry supply device can feed the positive electrode slurry into the lower mold cavity 1101 through the first feeding channel 1103, and the adhesive supply device can feed the adhesive into the upper mold cavity 1102 through the second feeding channel 1104. The lower mold cavity 1101 and the upper mold cavity 1102 are independently controlled and coated separately, thereby realizing the simultaneous and intermittent coating of the positive electrode slurry and adhesive, thus meeting the production requirements of the positive electrode sheet 1000.

[0059] Optionally, the intermediate mold 112 includes a first surface 1121 and a second surface 1122 arranged at an angle, the first surface 1121 and the second surface 1122 intersecting to form an intersection line. The first surface 1121 forms the upper cavity wall of the lower mold cavity 1101, and the second surface 1122 forms the lower cavity wall of the upper mold cavity 1102. With this arrangement, when the first gasket 120 and the second gasket 130 are both installed on the mold head assembly 110, the first liquid outlet channel 1201 and the two second liquid outlet channels 1301 are approximately located on the same straight line, that is, on the intersection line formed by the first surface 1121 and the second surface 1122. At this time, the first feed channel 1103 and the second feed channel 1104 can be controlled to open or close simultaneously, so as to simultaneously form a coating area 1001 coated with positive electrode slurry and a glue area 1002 coated with adhesive on the positive electrode sheet 1000.

[0060] like Figure 3 As shown, the first gasket 120 includes a first base 121 and two first connecting portions 122 respectively connected to both ends of the first base 121. The gap between the two first connecting portions 122 forms the first liquid outlet channel 1201, which has a simple structure and is easy to process and manufacture.

[0061] Optionally, the first gasket 120 is detachably installed in the lower mold cavity 1101 to facilitate the assembly of the first gasket 120 and the mold head assembly 110. Since the width of the coating area 1001 on different types of positive electrode sheets 1000 varies, when coating different types of positive electrode sheets 1000, the operator can easily install the first gasket 120, which is compatible with the positive electrode sheet 1000 to be coated, in the lower mold cavity 1101, further ensuring the production requirements of the positive electrode sheet 1000 and improving the versatility of the electrode coating mold head 100. Here, "the first gasket 120 compatible with the positive electrode sheet 1000 to be coated" refers to the first liquid outlet channel 1201 of the first gasket 120 having a width equal to the width of the coating area 1001.

[0062] Specifically, the first gasket 120 is provided with a first fixing hole 1211, and a first fastener passes through the first fixing hole 1211 and is connected to the lower mold 111 and / or the middle mold 112, thereby achieving a tight connection between the first gasket 120 and the lower mold cavity 1101. The first fastener is a screw, which offers the advantages of easy assembly and disassembly and a secure connection. Optionally, there may be multiple first fixing holes 1211, and each first fixing hole 1211 can correspond to one first fastener, further ensuring a stable connection between the first gasket 120 and the mold head assembly 110.

[0063] like Figure 4As shown, the second gasket 130 includes a second base 131, a second connecting portion 132, and an intermediate mating portion 133. The two second connecting portions 132 are respectively connected to the two ends of the second base 131, and the intermediate mating portion 133 is connected to the second base 131 and located between the two second connecting portions 132. The gap between the intermediate mating portion 133 and the two second connecting portions 132 forms the aforementioned second liquid outlet channel 1301. The structure is simple and easy to process and manufacture.

[0064] Optionally, the second gasket 130 is detachably installed in the upper mold cavity 1102 to facilitate the assembly of the second gasket 130 and the mold head assembly 110. Since the width of the coating area 1001 on different types of positive electrode sheets 1000 varies, when different types of positive electrode sheets 1000 need to be coated, the operator can also easily install the second gasket 130, which is compatible with the first gasket 120, in the upper mold cavity 1102 to further ensure the production requirements of the positive electrode sheet 1000 and improve the versatility of the electrode coating mold head 100.

[0065] Specifically, the second gasket 130 is provided with a second fixing hole 1311, and a second fastener passes through the second fixing hole 1311 and is connected to the upper mold 113 and / or the middle mold 112, thereby achieving a tight connection between the second gasket 130 and the upper mold cavity 1102. The second fastener is a screw, which offers the advantages of easy assembly and disassembly and a secure connection. Optionally, there are multiple second fixing holes 1311, and each second fixing hole 1311 corresponds to one second fastener, further ensuring a stable connection between the second gasket 130 and the mold head assembly 110.

[0066] Continue as Figure 1 and Figure 2 As shown, to facilitate the installation of the first gasket 120 and the second gasket 130 with the mold head assembly 110, in this embodiment, the lower mold 111 is rotatably connected to the middle mold 112; the upper mold 113 is rotatably connected to the middle mold 112. By rotating the lower mold 111 relative to the middle mold 112, the lower mold cavity 1101 can be opened and closed, thereby facilitating the installation and removal of the first gasket 120 in the lower mold cavity 1101; by rotating the upper mold 113 relative to the middle mold 112, the upper mold cavity 1102 can be opened and closed, thereby facilitating the installation and removal of the second gasket 130 in the upper mold cavity 1102.

[0067] Specifically, the middle mold 112 is provided with a hinge base 143 at one end away from the first liquid outlet channel 1201, the lower mold 111 is provided with a first hinge seat 141 at one end away from the first liquid outlet channel 1201, and the first hinge seat 141 is rotatably connected to the hinge base 143 through a first hinge shaft 144; the upper mold 113 is provided with a second hinge seat 142 at one end away from the first liquid outlet channel 1201, and the second hinge seat 142 is rotatably connected to the hinge base 143 through a second hinge shaft 145.

[0068] Figure 6 A schematic diagram of the coating apparatus provided in this embodiment is shown. Figure 6 and combined Figure 1 , Figure 2 As shown, this embodiment also provides a coating apparatus, which includes an electrode coating die 100, a frame 200, an unwinding mechanism, and a coating roller 400. The unwinding mechanism is disposed on the frame 200 and includes an unwinding assembly 310 and a winding assembly 320. The unwinding assembly 310 is used to unwind the electrode strip 2000, and the winding assembly 320 is used to wind the coated electrode strip 2000. The coating roller 400 is rotatably disposed on the frame 200 and is located between the unwinding assembly 310 and the winding assembly 320. The first liquid outlet channel 1201 and the second liquid outlet channel 1301 of the electrode coating die 100 are both oriented toward the coating roller 400 to coat the electrode strip 2000 that has passed through the coating roller 400 with slurry and adhesive. By employing the aforementioned electrode coating die 100, this coating apparatus can improve the coating efficiency of the positive electrode 1000, reduce coating costs, and meet the production needs of the electrode.

[0069] It should be explained that when the coating device is working, the unwinding assembly 310 unwinds the electrode strip 2000. When the electrode strip 2000 passes the coating roller 400, the electrode coating die head 100 coats the electrode strip 2000 with a preset length of positive electrode slurry and adhesive according to a preset program. Then, after stopping for a preset time, it restarts and coats the electrode strip 2000 with a preset length of positive electrode slurry and adhesive. Repeating the above steps can form multiple positive electrode sheets 1000 on the electrode strip 2000.

[0070] It should be noted that the unwinding assembly 310, the winding assembly 320, and the coating roller 400 are all relatively mature technologies in the prior art. The specific structure and working principle of the unwinding assembly 310, the winding assembly 320, and the coating roller 400 will not be described in detail in this embodiment.

[0071] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that the above embodiments do not limit this utility model in any way, and all technical solutions obtained by equivalent substitution or equivalent transformation fall within the protection scope of this utility model.

Claims

1. An electrode coating die head, characterized in that, include: The mold head assembly (110) includes a lower mold (111), a middle mold (112) and an upper mold (113) arranged sequentially from bottom to top. A lower mold cavity (1101) is formed between the lower mold (111) and the middle mold (112), and an upper mold cavity (1102) is formed between the middle mold (112) and the upper mold (113). A first gasket (120) is disposed in the lower mold cavity (1101), and a first liquid outlet channel (1201) is provided on the first gasket (120); The second gasket (130) is disposed in the upper mold cavity (1102). The second gasket (130) has two second liquid outlet channels (1301), which are located on both sides of the first liquid outlet channel (1201).

2. The electrode coating die head according to claim 1, characterized in that, The first gasket (120) includes a first base (121) and two first connecting portions (122) respectively connected to both ends of the first base (121), and the interval between the two first connecting portions (122) forms the first liquid outlet channel (1201).

3. The electrode coating die head according to claim 1, characterized in that, The second gasket (130) includes a second base (131), a second connecting portion (132), and an intermediate mating portion (133). The two second connecting portions (132) are respectively connected to the two ends of the second base (131). The intermediate mating portion (133) is connected to the second base (131) and located between the two second connecting portions (132). The gap between the intermediate mating portion (133) and the two second connecting portions (132) forms the second liquid outlet channel (1301).

4. The electrode coating die head according to claim 1, characterized in that, The first gasket (120) is detachably mounted in the lower mold cavity (1101); and / or The second gasket (130) is detachably installed in the upper mold cavity (1102).

5. The electrode coating die head according to claim 4, characterized in that, The first gasket (120) is provided with a first fixing hole (1211), and a first fastener passes through the first fixing hole (1211) and is connected to the lower mold (111) and / or the middle mold (112); and / or The second gasket (130) is provided with a second fixing hole (1311), and the second fastener passes through the second fixing hole (1311) and is connected to the upper mold (113) and / or the middle mold (112).

6. The electrode coating die head according to claim 1, characterized in that, The middle mold (112) includes a first surface (1121) and a second surface (1122) arranged at an angle. The first surface (1121) and the second surface (1122) intersect to form an intersection line. The first surface (1121) forms the upper cavity wall of the lower mold cavity (1101), and the second surface (1122) forms the lower cavity wall of the upper mold cavity (1102).

7. The electrode coating die head according to claim 1, characterized in that, The lower mold (111) and / or the middle mold (112) are provided with a first feeding channel (1103) communicating with the lower mold cavity (1101), and the first feeding channel (1103) is connected to a slurry supply device; and / or The upper mold (113) and / or the middle mold (112) are provided with a second feeding channel (1104) that communicates with the upper mold cavity (1102), and the second feeding channel (1104) is connected to the adhesive supply device.

8. The electrode coating die head according to any one of claims 1 to 7, characterized in that, The lower mold (111) is rotatably connected to the middle mold (112); and / or The upper mold (113) is rotatably connected to the middle mold (112).

9. The electrode coating die head according to claim 8, characterized in that, The middle mold (112) is provided with a hinge base (143) at one end away from the first liquid outlet channel (1201), and the lower mold (111) is provided with a first hinge seat (141) at one end away from the first liquid outlet channel (1201). The first hinge seat (141) is rotatably connected to the hinge base (143) through a first hinge shaft (144). The upper mold (113) is provided with a second hinge seat (142) at one end away from the first liquid outlet channel (1201). The second hinge seat (142) is rotatably connected to the hinge base (143) through a second hinge shaft (145).

10. A coating apparatus, characterized in that, include: Rack (200); An unwinding mechanism is provided on the frame (200). The unwinding mechanism includes an unwinding assembly (310) and a winding assembly (320). The unwinding assembly (310) is used to unwind the electrode strip (2000), and the winding assembly (320) is used to wind the coated electrode strip (2000). The coating roller (400) is rotatably mounted on the frame (200) and located between the unwinding assembly (310) and the winding assembly (320); According to any one of claims 1 to 9, the first liquid outlet channel (1201) and the second liquid outlet channel (1301) of the electrode coating die head are both oriented toward the coating roller (400) to coat the electrode strip (2000) passing through the coating roller (400) with slurry and adhesive.

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