Heating device and laminating equipment including the heating device

Abstract

The heating device of the present invention includes: a heating unit spaced at a predetermined distance from a stack in which electrodes and diaphragms are alternately disposed, and the heating unit is configured to heat the stack by a heat source to define a first region having adhesive strength; and a covering unit configured to block a portion of the heat source of the heating unit toward the stack to define a second region on the stack that has no adhesive strength or has adhesive strength less than that of the first region.

Description

Technical Field

[0001] Cross-reference to related applications

[0002] This application claims the benefit of priority to Korean Patent Application No. 10-2024-0089907, filed on July 8, 2024, the entire contents of which are incorporated herein by reference.

[0003]

[0004] The present invention relates to a heating device capable of improving the electrolyte impregnation capability and a laminating device including the heating device. Background Technology

[0005] Generally, unlike non-rechargeable primary batteries, secondary batteries are batteries that can be both recharged and discharged. Secondary batteries are widely used in mobile phones, laptops, and camcorders, among other devices.

[0006] Secondary batteries are divided into can-type secondary batteries with electrode components built into a metal can and bag-type secondary batteries with electrode components built into a bag.

[0007] Can-type secondary batteries include electrode assemblies comprising one or more stacks, a can housing the electrode assemblies, and a cap assembly installed in the opening of the can. Additionally, pouch-type secondary batteries include electrode assemblies comprising one or more stacks, a pouch housing the electrode assemblies, and electrode leads connected to the electrode assemblies and extending from the pouch.

[0008] Each of the stacks can have a structure in which electrodes and diaphragms are alternately arranged, and the electrodes can include positive and negative electrodes. That is, the stack has a structure in which positive and negative electrodes are alternately arranged with a diaphragm between them.

[0009] Here, the secondary battery undergoes a lamination process to increase the bonding strength of the stack, and the lamination process includes a heating process of heating the stack and a pressing process of pressing to bond the stack together.

[0010] However, the lamination process according to the relevant technology can increase the bonding strength due to the adhesion of the entire surface of the electrode and the separator, but it has the problem that the electrolyte immersion takes a lot of time. Therefore, there is a problem that the defect rate increases as lithium deposition occurs. Summary of the Invention

[0011] Technical issues

[0012] The object of the present invention is to provide a heating device and a laminating apparatus including the heating device, wherein heated and non-heated areas are defined to pattern the bonding of stacks during lamination, i.e., adhesive areas are provided on the stacks by the heated areas and non-adhesive areas are provided on the stacks by the non-heated areas, resulting in improved adhesive strength and electrolyte impregnation capability.

[0013] Technical solution

[0014] The heating device of the present invention may include: a heating unit spaced at a predetermined distance from a stack in which electrodes and diaphragms are alternately disposed, and the heating unit being configured to heat the stack by a heat source to define a first region having adhesive strength; and a covering unit configured to block a portion of the heat source of the heating unit facing the stack to define a second region on the stack that has no adhesive strength or has adhesive strength less than that of the first region.

[0015] The heating unit may include: a heater configured to irradiate the heat source toward the stack; and a heating body to which the heater is fixed.

[0016] The covering unit may include: a covering portion disposed between the stack and the heating unit to shield a portion of the heat source of the heating unit facing the stack; and a fixing portion configured to connect the covering portion to the heating body.

[0017] The covering portion may be elongated along the conveying direction of the stack, and the fixing portion may be located at each of the two ends of the covering portion, wherein the ends may be connected to the heating body.

[0018] The covering portion may include a reflector configured to reflect the heat source of the heating unit, so that the heat source does not irradiate the stack.

[0019] The covering portion may further include a heat-resistant plate disposed on one surface of the reflector and having thermal conductivity and heat resistance.

[0020] The covering portion may further include a shielding plate disposed on the outer surface of the heat-resistant plate and having thermal conductivity.

[0021] The covering unit may be configured in at least two to define two or more second regions on the stack.

[0022] It may further include a coupling unit that connects the covering unit to the heating unit, wherein the coupling unit may include a horizontal adjustment member configured to movably connect the covering unit in a horizontal direction perpendicular to the transport direction of the stack.

[0023] The horizontal adjustment member can be disposed on the side of the heating body and has a horizontal guide hole, and the fixing part of the covering unit is connected to the horizontal guide hole so as to be movable in the horizontal direction.

[0024] The connection unit may further include a vertical adjustment member configured to connect the horizontal adjustment member to the heating body, wherein the horizontal adjustment member is movably connected in a vertical direction toward the stack to adjust the distance between the stack and the covering unit.

[0025] The lamination apparatus of the present invention may include: the heating device; and a lamination device configured to press the stack through the heating device.

[0026] Beneficial effects

[0027] The heating device of the present invention may be characterized by including a heating unit and a covering unit. Due to this feature, a first region with adhesive strength and a second region with no adhesive strength or with adhesive strength less than that of the first region can be provided on the stack. Therefore, the adhesive strength can be increased by the first region of the stack, and the electrolyte impregnation capability can be improved by the second region. As a result, both the adhesiveness and electrolyte impregnation capability of the stack can be satisfied simultaneously.

[0028] In the heating device of the present invention, the covering unit may be characterized by including: a covering portion that blocks a portion of the heat source of the heating unit; and a fixing portion that connects the covering portion to the heating body. Due to this feature, the heat source of the heating unit facing the stack can be effectively blocked, thus ensuring the stability of the second region within the stack.

[0029] In the heating device of the present invention, the feature of the shielding portion may include a reflective plate that reflects the heat source of the heating unit to block the heat source from irradiating the stack. Due to this feature, the heat source of the heating unit facing the stack can be effectively blocked.

[0030] In the heating device of the present invention, the covering portion may further include a heat-resistant plate with high thermal conductivity and high heat resistance, and a shielding plate with low thermal conductivity. Due to this feature, the stacked body can be effectively prevented from being heated by the heat source of the heating unit, and therefore, the formation of adhesive strength in the second region can be effectively prevented.

[0031] In the heating device of the present invention, a connecting unit may be further included to connect the covering unit to the heating unit, and the connecting unit is characterized in that the covering unit is movably connected in a horizontal direction perpendicular to the conveying direction of the stack and in a vertical direction toward the stack. Due to this feature, the position of the covering unit can be adjusted based on the stack, and therefore, the position of the second region disposed on the stack can be adjusted. Attached Figure Description

[0032] Figure 1 This is a plan view of the stacked body according to the present invention.

[0033] Figure 2 This is an exploded perspective view of a heating device according to a first embodiment of the present invention.

[0034] Figure 3 This is an assembly perspective view of the heating device only according to the first embodiment of the present invention.

[0035] Figure 4 This is a front view of a heating device according to a first embodiment of the present invention.

[0036] Figure 5 This is a side view of a heating device according to a first embodiment of the present invention.

[0037] Figure 6 It is along Figure 5 The cross-sectional view taken by line AA.

[0038] Figure 7 It is along Figure 5 The cross-sectional view taken from line BB.

[0039] Figure 8 This is a cross-sectional view illustrating a first example of a covering portion according to a first embodiment of the present invention.

[0040] Figure 9 This is a cross-sectional view illustrating a second example of the covering portion according to the first embodiment of the present invention.

[0041] Figure 10 This is a side view illustrating the use state of the heating device according to the first embodiment of the present invention.

[0042] Figure 11 This is a process diagram of a laminating apparatus according to a second embodiment of the present invention. Detailed Implementation

[0043] Hereinafter, embodiments of the invention will be described in detail with reference to the accompanying drawings in a manner that enables those skilled in the art to readily implement the technical concept of the invention. However, the invention may be embodied in different forms and should not be construed as limited to the embodiments set forth herein. In the drawings, for clarity, any content unnecessary for describing the invention will be omitted, and similar reference numerals in the drawings denote similar elements.

[0044] [The stacked structure of the present invention]

[0045] Figure 1 This is a plan view of the stacked body according to the present invention.

[0046] like Figure 1 As shown, the stack 1 of the present invention has a structure including electrodes and a diaphragm. Here, the electrodes can be positive and negative electrodes.

[0047] As a first example, the stack body 1 can be a stacked type stack body in which electrodes and diaphragms are stacked alternately. As a second example, the stack body 1 can be a jelly roll type stack body in which electrodes are sequentially arranged via diaphragm sheets having a long sheet shape. Additionally, in this invention, as one embodiment, a stacked type stack body in which electrodes and diaphragms are stacked alternately is described.

[0048] The stack 1 includes a first region 1a having adhesive strength and a second region 1b having no adhesive strength or having adhesive strength less than that of the first region 1a.

[0049] Here, a first region 1a with adhesive strength can be provided at each of the two ends of the stack 1 to increase the adhesive strength between the electrode and the diaphragm provided at the ends of the stack 1.

[0050] The stack 1 of the present invention can improve the electrolyte impregnation capability by providing a second region 1b. That is, as... Figure 1 As indicated by the arrow, the electrolyte impregnation capability can be greatly improved by impregnating the electrolyte through the outside of the stack body 1 and the second region 1b disposed on the stack body 1.

[0051] In order to manufacture the stack body 1 of the present invention having the above-described structure, a lamination process is performed, and in particular, a heating process for heating the stack body 1 is first performed during the lamination process.

[0052] Furthermore, in the heating process, the stack 1 is heated using a heating device 10 according to the first embodiment of the present invention.

[0053] In particular, in the heating device 10 according to the first embodiment of the present invention, a portion of the stack 1 may form a first region with adhesive strength, and the remaining portion may form a second region 1b with no adhesive strength or with adhesive strength less than that of the first region 1a. Therefore, adhesive strength can be increased through the first region 1a, and electrolyte impregnation capability can be improved through the second region 1b. Thus, operating time can be significantly reduced.

[0054] The heating device according to the first embodiment of the present invention will be described in detail below with reference to the accompanying drawings.

[0055] [Heating device according to the first embodiment of the present invention]

[0056] Figure 2 This is an exploded perspective view of a heating device according to a first embodiment of the present invention. Figure 3 This is an assembly perspective view of the heating device only according to the first embodiment of the present invention. Figure 4 This is a front view of a heating device according to a first embodiment of the present invention. Figure 5 This is a side view of a heating device according to a first embodiment of the present invention. Figure 6 It is along Figure 5 A cross-sectional view taken from line AA. Figure 7 It is along Figure 5 A cross-sectional view taken from line BB. Figure 8 This is a cross-sectional view illustrating a first example of a covering portion according to a first embodiment of the present invention. Figure 9 This is a cross-sectional view illustrating a second example of the covering portion according to the first embodiment of the present invention, and Figure 10 This is a side view illustrating the use state of the heating device according to the first embodiment of the present invention.

[0057] like Figure 2 and Figure 3 As shown, the heating device 10 according to the first embodiment of the present invention includes a heating unit 11 and a covering unit 12.

[0058] heating unit

[0059] The heating unit 11 is configured to provide a first region 1a with adhesive strength on the stack 1.

[0060] That is, the heating unit 11 is spaced a certain distance from the stack 1 and heats the stack 1 by a heat source to provide a first region 1a with adhesive strength.

[0061] For example, such as Figure 2 and Figure 3As shown, the heating unit 11 includes: a heater 111 that irradiates a heat source toward the stack 1; and a heating body 112 to which the heater 111 is fixed.

[0062] Heater 111 is configured to generate heat.

[0063] That is, the heater 111 is elongated in a horizontal direction perpendicular to the conveying direction of the stack 1, so as to irradiate the heat source along the entire length of the stack 1. In particular, multiple heaters 111 can be provided, and multiple heaters 111 can be arranged in the conveying direction of the stack 1 to effectively heat the stack 1. See reference. Figure 2 Heater 111 is elongated in the "X" direction of the stack 1, and multiple heaters are arranged in the "Y" direction.

[0064] Heater 111 can be an IR heater (Infrared Radiation Heater). IR heaters transfer heat via infrared rays, which are effectively heated because they are directly absorbed into the object. In particular, unlike harmful industrial heaters, IR heaters provide a safe and efficient heat source.

[0065] The heating body 112 is configured as a fixed heater 111.

[0066] That is, the heating body 112 has a receiving space defined in the bottom surface of the heating body 112 to receive the heater 111. In particular, the plurality of heaters 111 are fixed in a state in which they are arranged at regular intervals in the receiving space.

[0067] The heating unit 11 with this structure irradiates a heat source onto the stack 1, which is continuously conveyed along the "Y" direction, via a heater 111. Here, the first region 1a of the stack 1, which is irradiated by the heat source of the heater 111, is heated and has adhesive strength. In other words, when the diaphragm and electrodes of the stack 1 disposed on the first region 1a are heated, the adhesive strength increases.

[0068] Here, the characteristic of increased adhesive strength when the diaphragm and electrodes are heated is a known technique in the lamination process, and therefore a detailed description will be omitted.

[0069] Cover unit

[0070] The covering unit 12 is configured to block part of the heat source of the heating unit 11 facing the stack body 1, so as to provide a second region 1b on the stack body 1 that has no adhesive strength or has an adhesive strength that is smaller than that of the first region 1a.

[0071] That is, the covering unit 12 can block part of the heat source of the heating unit 11 facing the stack body 1 in order to provide a second region 1b on the stack body 1.

[0072] For example, the covering unit 12 includes: a covering part 121 disposed between the stack body 1 and the heating unit 11 to cover a portion of the heat source of the heating unit 11 facing the stack body 1; and a fixing part 122 connecting the covering part 121 to the heating body 112.

[0073] The covering portion 121 is configured to block a portion of the heat source of the heating unit 11 facing the stack body 1 to provide a second region 1b on the stack body 1, and the fixing portion 122 is configured to fix the covering portion 121 to the heating unit 11.

[0074] The covering unit 12 with this structure can provide a second region 1b in which the heat source of the heating unit 11 is not irradiated by the heat source of the stack 1 by blocking a portion of the heat source of the heating unit 11 via the covering portion 121. Therefore, the second region 1b has no adhesive strength or has an adhesive strength that is smaller than that of the first region 1a. The second region 1b can also have adhesive strength when a portion of the heat source of the first region 1a is conducted to the second region 1b. However, since the second region 1b has a lower temperature than the first region 1a, the second region 1b has an adhesive strength that is smaller than that of the first region 1a.

[0075] The covering portion 121 can be elongated along the conveying direction of the stack 1. That is, the covering portion 121 can be... Figure 2 The region is elongated in the "Y" direction as shown. Therefore, the second region 1b can be stably set in the multiple stacked bodies 1 being transported.

[0076] The fixing part 122 can be provided at each of the two ends of the covering part 121, and the end can be connected to the heating body 112. That is, the covering unit including the covering part 121 and the fixing part 122 can have a generally "U" shape.

[0077] The cover 121 has a stacked structure to effectively shield the heat from the heating unit 11.

[0078] As a first example, such as Figure 8 As shown, the shielding portion 121 may include the heat source of the reflective heating unit 11 to block the heat source from shining onto the reflector 1211 of the stack 1. The reflector 1211 may be made of a silver foil material with high reflectivity.

[0079] The shielding portion 121 also includes a heat-resistant plate 1212 to enhance the strength of the reflector 1211 and block the heat source of the heating unit 11 from passing through the reflector 1211. That is, the heat-resistant plate 1212 is disposed on one surface of the reflector 1211 and is made of a material with high thermal conductivity and heat resistance. For example, the heat-resistant plate 1212 can be made of stainless steel. The temperature can be reduced by rapidly dispersing the heat source of the heating unit 11 across the entire heat-resistant plate 1212.

[0080] In summary, the cover portion 121 has a structure in which a reflector 1211 and a heat-resistant plate 1212 are arranged sequentially in the direction toward the stack body 1.

[0081] As a second example, such as Figure 9 As shown, the covering portion 121 includes a baffle plate 1213 and a heat-resistant plate 1212. In particular, a baffle plate 1213, disposed on the outer surface of the heat-resistant plate 1212 and having low thermal conductivity (i.e., lower than that of the heat-resistant plate), can be further provided. The baffle plate 1213 completely blocks the heat source of the heating unit 11 from passing through the covering unit 12. For example, the baffle plate 1213 can be made of a synthetic resin material, preferably polypropylene.

[0082] In summary, the cover portion 121 has a structure in which a reflector 1211, a heat-resistant plate 1212, and a shield 1213 are arranged sequentially in the direction toward the stack body 1.

[0083] The covering unit 12 can be configured in at least two forms to provide two or more second regions 1b on the stack 1. For example, refer to Figure 10 When two covering units 12 are installed on the heating unit 11, a first region 1a, a second region 1b, a first region 1a, a second region 1b, and a first region 1a can be defined on the stack body 1. This increases the adhesive strength by providing three adhesive regions via the three first regions 1a, and increases the electrolyte impregnation capability by providing two non-adhesive regions via the two second regions 1b.

[0084] Therefore, the heating device 10 according to the first embodiment of the present invention includes a heating unit 11 and a covering unit 12 to define a first region 1a with adhesive strength and a second region 1b with no adhesive strength or with adhesive strength less than that of the first region 1a on the stack body 1, thereby improving both adhesive strength and electrolyte impregnation ability, and as a result, preventing defects caused by lithium deposition.

[0085] The heating device 10 according to the first embodiment of the present invention may further include a connecting unit 13 that connects the covering unit 12 to the heating unit 11.

[0086] Connection unit

[0087] The connecting unit 13 is configured to connect the covering unit 12 to the heating unit 11. Specifically, the connecting unit 13 includes a horizontal adjustment member 131, which adjusts the covering unit 12 in a horizontal direction orthogonal to the conveying direction of the stack 1. Figure 2 It can move its position in the "X" direction shown in the diagram.

[0088] The horizontal adjustment components 131 are arranged in pairs to be positioned on both sides of the heating body 112 (i.e., as shown in the image). Figure 2 The front and rear surfaces of the heating body 112 shown are shown, and a guide hole 1311 is defined therein. The fixing part 122 of the covering unit 12 is connected to the guide hole 1311 to be movable in the horizontal direction.

[0089] That is to say, the covering unit 12 can move along the guide hole 1311 of the horizontal adjustment member 131. Figure 2 The movement is in the "X" direction shown. Therefore, the position of the covering unit 12 can be adjusted based on the stack body 1, and as a result, the position of the second region 1b to be defined on the stack body 1 can be adjusted.

[0090] The covering unit 12 can be fixed in place by means of a fixing device to prevent the horizontal adjustment member 131 from moving. The fixing device can be a fixing bolt and a fixing nut. That is to say, the covering unit 12 can move and can be fixed by a fixing bolt and a fixing nut.

[0091] The connecting unit 13 may further include a vertical adjustment member 132, which connects the horizontal adjustment member 131 to the heating body 112, and the horizontal adjustment member 131 is positioned in the vertical direction toward the stack body 1 (when in...). Figure 2 While being movably connected in the upward and downward directions during observation, the distance between the stack 1 and the covering unit 12 can be adjusted.

[0092] That is, the vertical adjustment member 132 is provided on each of the two sides of the heating body 112, and the vertical adjustment member 132 defines a plurality of bolt holes 1321 in the vertical direction toward the stack body 1. That is, the horizontal adjustment member 131 can be connected to one of the plurality of bolt holes 1321 to adjust the height of the horizontal adjustment member 131 based on the vertical adjustment member 132, and thus the height between the horizontal adjustment member and the stack body 1 can also be adjusted.

[0093] Therefore, the heating device 10 according to the first embodiment of the present invention can adjust the position of the covering unit 12 by including the connecting unit 13, so the position of the second region 1b defined on the stack body 1 can be adjusted, and the distance between the stack body 1 and the covering part can also be adjusted.

[0094] In the following description of other embodiments of the present invention, the same reference numerals are used for components having similar functions to those in the foregoing embodiments, and therefore repeated descriptions will be omitted.

[0095] [Lamination apparatus according to a second embodiment of the present invention]

[0096] Figure 11 This is a process diagram of a laminating apparatus according to a second embodiment of the present invention.

[0097] The laminating apparatus 2 according to a second embodiment of the present invention includes a heating device 10 and a laminating device 20 that presses the stacked body 1 through the heating device 10.

[0098] Here, the heating device 10 is the same as the heating device 10 according to the first embodiment described above, so repeated descriptions will be omitted.

[0099] The laminating apparatus 20 is provided with a pair of pressing rollers, which press the stack 1 passing through the heating device 10. Here, a first region 1a defined on the stack 1 is adhered due to adhesive strength, and a second region 1b is not adhered or is adhered with an adhesive strength less than that of the first region 1a.

[0100] Therefore, the lamination apparatus 2 according to the second embodiment of the present invention can manufacture a stack 1 that can increase the adhesive strength through the first region 1a and improve the electrolyte impregnation capability through the second region 1b.

[0101] Therefore, the scope of this invention is defined by the appended claims, rather than by the foregoing description and the exemplary embodiments described herein. Various modifications made within the equivalent meaning of the claims and within the scope of the claims are considered to be within the scope of this invention.

[0102] [Description of reference numerals in the attached figures]

[0103] 1: Stacked body

[0104] 1a: First area

[0105] 1b: Second Zone

[0106] 2: Lamination equipment

[0107] 10: Heating device

[0108] 11: Heating Unit

[0109] 111: Heater

[0110] 112: Heating unit

[0111] 12: Covering unit

[0112] 121: Covered area

[0113] 1211: Reflector

[0114] 1212: Heat-resistant board

[0115] 1213: Blind

[0116] 122: Fixing part

[0117] 13: Connection Unit

[0118] 131: Horizontal adjustment component

[0119] 1311: Guide hole

[0120] 132: Vertical adjustment component

[0121] 1321: Bolt hole

[0122] 20: Lamination device.

Claims

1. A heating device, comprising: A heating unit is spaced a predetermined distance from a stack in which electrodes and diaphragms are alternately arranged, and the heating unit is configured to heat the stack by a heat source to define a first region having adhesive strength; as well as A covering unit configured to block a portion of the heat source of the heating unit facing the stack, thereby defining a second region on the stack that has no adhesive strength or has an adhesive strength less than that of the first region.

2. The heating device according to claim 1, wherein the heating unit comprises: A heater configured to irradiate the heat source toward the stack; as well as A heating body, wherein the heater is fixed to the heating body.

3. The heating device according to claim 2, wherein the covering unit comprises: A covering portion is disposed between the stack and the heating unit to shield a portion of the heat source of the heating unit facing the stack; as well as A fixing part is configured to connect the covering part to the heating body.

4. The heating device according to claim 3, wherein the covering portion is elongated along the conveying direction of the stack, and The fixing part is provided at each of the two ends of the cover part, wherein the end is connected to the heating body.

5. The heating device according to claim 3, wherein the covering portion includes a reflector configured to reflect the heat source of the heating unit such that the heat source does not irradiate the stack.

6. The heating device according to claim 5, wherein the covering portion further comprises a heat-resistant plate disposed on one surface of the reflector and having thermal conductivity and heat resistance.

7. The heating device according to claim 6, wherein the covering portion further comprises a baffle plate disposed on the outer surface of the heat-resistant plate and having thermal conductivity.

8. The heating device of claim 1, wherein the covering unit is configured in at least two forms to define two or more second regions on the stack.

9. The heating device according to claim 2, further comprising a connecting unit that connects the covering unit to the heating unit. The connecting unit includes a horizontal adjustment member configured to movably connect the covering unit in a horizontal direction perpendicular to the transport direction of the stack.

10. The heating device according to claim 9, wherein the horizontal adjustment member is disposed on the side of the heating body and has a horizontal guide hole, and the fixing part of the covering unit is connected to the horizontal guide hole to be movable in the horizontal direction.

11. The heating device of claim 9, wherein the coupling unit further comprises a vertical adjustment member configured to couple the horizontal adjustment member to the heating body, wherein the horizontal adjustment member is movably coupled in a vertical direction toward the stack to adjust the distance between the stack and the covering unit.

12. A lamination apparatus, comprising: The heating device according to claim 1; as well as A laminating device configured to press a stack through the heating device.

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