JP3237010U - Button type battery module and its battery device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a novel button type battery module and a battery device thereof for a conventional defect. SOLUTION: A battery cell 40 and a metal shell 30 in which the battery cell is sealed are included, and a plurality of individually and completely sealed battery units 20 are connected in series or in parallel by contacting each other. Alternatively, the battery cell is formed by mixing series and parallel connections, the metal shell includes the upper lid 31 and the lower lid 32, and both the upper lid and the lower lid are electrically insulated and the battery cell is provided. It is a button type battery module 60 and a battery device thereof that are in contact with different polar ends of the above to form a positive electrode end and a negative electrode end. [Selection diagram] FIG. 2A

Description

The present invention relates to a battery unit, and more particularly to a button-type battery module in which a battery cell is composed of completely and individually sealed battery units and is sealed with a metal shell.

In conventional battery devices, in many cases, a single battery unit is connected in series or in parallel in the Z-axis direction, or in series or in parallel, in order to obtain sufficient capacity and voltage to be applied in various fields. A vertically stacked battery cell is configured by a mixed connection method, and the vertically stacked battery cells are horizontally connected by a horizontal conductor to form a desired battery device.

The prior application includes, for example, TW107135860 and TW107135859 of the present applicant, but such a connection structure has several drawbacks as follows.
1. 1. Not easy to assemble. For example, the procedure for stacking, assembling, and aligning a single cell is complicated and time-consuming.
2. 2. When a problem occurs with a single battery cell, it is difficult to replace it promptly, which greatly increases the difficulty of maintenance.

In view of the above problems, the present invention provides a novel button-type battery module and its battery device for the above-mentioned defects.

The main purpose of the present invention is to maximize the current path of a battery cell by stacking battery units, which are completely and individual modules, to form a battery cell, and by directly contacting and electrically connecting to a metal shell. The purpose is to provide a button-type battery module.

Another object of the present invention is that a desired battery device can be configured by directly laminating and connecting, and by connecting with the patterning conductor layer in the other axial direction, assembly is easier and inspection is performed. And to provide a button-type battery module that is easy to maintain and replace.

The present invention includes a battery cell and a metal shell, and the battery cell is configured by stacking a plurality of battery units and connecting them in series or in parallel, or by mixing series and parallel connections, and each of them. Each battery unit is a separate and complete module, and the metal shell contains an upper and lower lid, the battery cell is encapsulated therein, and the outermost positive and negative current collection of the battery cell. A button-type battery module is provided that maximizes the current path of the battery cell by pulling the layer directly to the upper and lower lids of the metal shell to form the positive and negative ends of the entire button-type battery module.

The battery device disclosed in the present invention constitutes a desired battery device by directly stacking the button-type battery modules and directly electrically connecting the upper lid and the lower lid of the metal shell, and is easier to assemble. Moreover, it has advantages such as easy inspection, maintenance, and replacement. On the other hand, further, by connecting with the patterning conductor layer in the other axial direction, expansion in the biaxial direction becomes possible.

Further, by filling the space between the battery cell and the metal shell with a heat radiating agent or a flame retardant, it is possible to enhance the heat radiating effect, maintain the performance of the battery, and improve the safety of the battery device.

By giving a detailed explanation with specific examples below, it will be easier to understand the purpose, technical content, features and effects achieved by the present invention.

It is a schematic diagram of the battery unit of the button type battery module of this invention. It is a schematic diagram of another embodiment of the battery unit of the button type battery module of this invention. It is an exploded schematic diagram of the battery unit of the button type battery module of this invention. It is a schematic diagram of the series type of the button type battery module of this invention. It is a schematic diagram of the end face insulation form of the button type battery module of this invention. It is a schematic diagram of the end face insulation form of the button type battery module of this invention. It is a schematic diagram of the parallel type of the button type battery module of this invention. It is a schematic diagram of the series / parallel mixed type of the button type battery module of this invention. It is a schematic diagram which combined the heat dissipation conductive holder with the battery cell of the button type battery module of this invention. It is a schematic diagram which combined the heat dissipation conductive holder with the battery cell of the button type battery module of this invention. It is a schematic diagram which combined the button type battery module of this invention as a battery device. It is a schematic diagram which combined the button type battery module of this invention as a battery device.

In order to make it easier to understand the advantages, technical ideas and features of the present invention more clearly, the following will be described in detail with reference to the above drawings according to examples. It should be stated that these examples are merely representative examples of the present invention and are not intended to limit the embodiments and claims of the present invention to these embodiments. Is. The purpose of providing these examples is merely to facilitate a more general understanding of the disclosure of the present invention.

The terms used in the various examples disclosed in the present invention are used only for the purpose of describing a specific example, and are not limited to the various examples disclosed in the present invention. Unless explicitly instructed, the singular format used includes multiple formats. Unless otherwise specified, all terms (including technical and scientific terms) used herein have the same meanings as those skilled in the art would normally understand in the various embodiments disclosed in the present invention. .. The above terms (eg, terms limited in commonly used dictionaries) are interpreted to have the same meaning as the contextual meaning in the same technical field, and have an idealized or formal meaning. It should not be interpreted as a meaning beyond. However, this does not apply if it is clearly limited in the various examples disclosed in the present application.

In the description in the present specification, what is described by the reference terms "one embodiment", "one specific embodiment" and the like are specific features, structures and materials described by combining the examples. Alternatively, it means that the feature is included in at least one embodiment of the present invention. In the present specification, the schematic expressions of the above terms do not necessarily mean the same embodiment. Moreover, the specific features, structures, materials or features to be described can be combined in any one or more embodiments in an appropriate manner.

In the description of the present invention, it should be explained in a broad sense that the terms "join", "connection", and "provide" should be understood in a broad sense, unless otherwise specified or limited. What is connected to a machine or electrically connected may be a communication inside two elements, a direct connection, or a connection via an intermediate medium, and for those skilled in the art, It means that the specific meanings of the above terms can be understood according to the specific situation.

Since the button-type battery module of the present invention is a combination of completely and individually sealed battery units 20, a portion of the completely and individually sealed battery units 20 will be described first.
See FIGS. 1A and 1C. For example, the battery unit 20 of the present invention includes a positive electrode current collector layer 24, a negative electrode current collector layer 25, an electrochemical system 201, and an adhesive frame body 26. The electrochemical system 201 includes a separator layer 21, two active material layers 22 and 23, and an electrolyte impregnated or kneaded in the active material layers 22 and 23 and the separator layer 21. The material can be selected from a polymer material, a ceramic material or a glass fiber material, or a polymer material base material or a glass fiber material base material coated with powdered ceramics.
The separator layer has micropores through which ions can pass, and the micropores may be in the form of a straight hole or a bent hole (a non-linear penetrating form), and in some cases, a porous material is directly adopted. May be realized. When the ceramic material is selected from the insulating materials, the materials such as titanium dioxide (TIM ₂ ), aluminum oxide (Al ₂ O ₃ ), silicon dioxide (SiO ₂ ), etc. at the micrometer level and nanometer level are or alkylated. It can be formed of ceramic particles. The ceramic material may be selected from, for example, lithium lanthanum zirconium oxide; Li ₇ La ₃ Zr ₂ O ₁₂ ; LLZO) or titanium aluminium aluminum phosphate (LATP). Further, the ceramic material may be a mixture of the insulating ceramic material and the oxide solid electrolyte. The above-mentioned separator layer is, for example, polyvinylidene fluoride (PVDF), polyvinylidene fluoride-hexafluoropropylene copolymer (PVDF-HFP), polytetrafluoroethylene (PTFE), acrylic acid-based adhesive (Acrylic). A polymer adhesive such as Acid Blue), epoxy resin (Epoxy), polyethylene oxide (PEO), polyacrylonitrile (PAN) or polyimide (PI) can be further contained.

The electrochemical system 201 includes an active material layers 22 and 23, a separator layer 21 between the active material layers 22 and 23, and an electrolyte impregnated / kneaded in the active material layers 22 and 23. .. The electrolyte can be a liquid, gel, solid electrolyte, or a mixed electrolyte of any combination thereof. The active material layers 22 and 23 are separated by an intermediate separator layer 21, and the chemical energy is converted into electric energy for use (power supply) by the active material component, or the electric energy is converted into chemical energy. The system can be charged (charged), and the conduction and migration of ions can be realized at the same time, and the generated electrons can be directly derived to the outside from the positive electrode current collecting layer 24 and the negative electrode current collecting layer 25. Here, the materials of the positive electrode current collector layer 24 and the negative electrode current collector layer 25 are generally copper and aluminum, but of course, they are other metals such as nickel, tin, silver, and gold, or alloys of metals. Or may be a polymer conductive material.

The material of the adhesive frame 26 can be an epoxy resin, polyethylene, polypropylene, polyurethane, a thermoplastic polyimide, a silicone resin, an acrylic resin, a silicone, or a UV curable adhesive. The adhesive frame is provided on the periphery of the positive electrode current collector layer 24 and the negative electrode current collector layer 25, and at the same time, surrounds and seals the electrochemical system 201 (active material layers 22 and 23 and the separator layer 21 in the middle), and at the same time, the positive electrode. It is used to bond the current collector layer 24 and the negative electrode current collector layer 25, so that the electrolyte does not leak between the two current collector layers 24 and 25, and it is compatible with the other electrolytes of the battery unit 20. It is sealed so that it does not flow. Therefore, the battery unit 20 is an individual and complete power supply module formed by directly adopting the positive electrode current collector layer 24, the negative electrode current collector layer 25, and the adhesive frame 26 as a package structure.

In order to make the sealing effect of the adhesive frame 26 more suitable, when a silicone material is adopted, the adhesive frame 26 can be designed to have a three-layer structure.
See FIG. 1B. The upper and lower two layers are the modified silicone layers 261 and 262, the middle is the silicone layer 263, and the modified silicone layers 261 and 262 on both sides adjust the composition ratio of the silicone-added silicone and the condensed silicone. Or, it is modified by adding an additive to be adapted to the adhesion of different materials (that is, the positive electrode current collector layer 24, the negative electrode current collector layer 25, and the intermediate silicone layer 263). This design can improve the adhesive strength of the interface, while at the same time improving the overall appearance consistency and improving the production yield.

After laminating with the battery unit 20 described above, it can be further sealed with a metal shell 30.
See FIG. 2A. The plurality of battery units 20 are stacked in the same direction. In other words, the positive electrode current collector layers 24 having the same polarity are all provided upward, and the lower negative electrode current collector layer 25 is the positive electrode of the adjacent battery unit 20. Since it comes into direct contact with the current collector layer 24, it is electrically connected in sequence to form a series type battery cell 40 for sealing.

The metal shell 30 includes an upper lid 31, a lower lid 32, and an intermediate insulating layer 33. The battery cell 40 is covered inside by the upper lid 31 and the lower lid 32, and further separated and insulated by the intermediate insulating layer 33 to prevent a short circuit due to contact between the upper lid 31 and the lower lid 32. As will be described in particular here, the form of the metal shell 30 is not limited to the form shown in the drawing, and further, by adopting a silicone material for the insulating layer 33, a waterproof effect is further realized in addition to insulation. can do.
The battery unit 20 of the present invention is a complete and individual module. In other words, the electrolytes in the battery unit 20 are completely sealed as individual modules so that the electrolytes between each other do not come into contact with each other and the electrolytes are not shared between the battery units 20. Therefore, there is no problem of deterioration of the electrolyte. That is, it is not necessary to fill the outside of the battery unit 20 (between the metal shell 30) with a common electrolytic solution, and in addition, the outermost side of the battery unit 20 of the present invention is that is, the positive electrode current collector layer 24 and the negative electrode current collector layer 25. Therefore, it is electrically connected by directly contacting the metal shell 30 (upper lid 31 and lower lid 32) (that is, the upper lid 31 and the lower lid 32 are electrically connected to different polar ends. ), The positive electrode end and the negative electrode end can be configured to be derived so as to output electric power to the outside. Therefore, by maximizing the current path of the battery cell 40 and connecting or wiring separately, which was necessary in the past, it is possible to solve the consequential problem.

On the other hand, since there is a possibility that the end face of the battery unit 20 may also come into contact with the metal shell 30 (upper lid 31 and lower lid 32) to cause a short circuit. By providing the insulators 34 on both sides of the unit 20, it is possible to prevent the end faces of the battery unit 20 from coming into contact with each other and causing unnecessary contact with the inside of the metal shell 30 to cause a short circuit. Since the insulating layer 33 has an insulating property, as shown in FIG. 2C, the insulating layer 33 is directly extended inward to cover the inside of the metal shell 30 and both sides of the laminated battery unit 20. Therefore, it is not necessary to provide the insulator 41.

Please continue to refer to FIG. This is a parallel type package, in which a plurality of battery units 20 are sequentially stacked in opposite directions. In other words, the positive electrode current collector layer 24 and the negative electrode current collector layer 25 having the same polarity are in contact with each other in sequence, and all the positive electrode current collector layers 24 and the negative electrode current collector layer 25 having the same polarity are further connected by an electrode tab or a conductive holder or the like. Then, a parallel type battery cell 40 is configured and sealed. Since the other parts with which the package is in electrical contact are the same as those in the above embodiment, no duplicate description will be given.

For example, see FIG. 4 for the serial / parallel mixed type. The series-parallel type can be adjusted according to actual needs, for example, by capacitance, voltage magnitude, etc., and will be described here only with drawings. As shown in the figure, three battery units 20 are connected in parallel first as a set, and the parallel method is the same as in FIG. After that, three more parallel sets are connected in series. Similarly, since the series method is the same as that in FIG. 2, a series / parallel mixed type can be configured.

Similarly, whether it is a parallel type (see FIG. 3) or a series / parallel mixed type (see FIG. 4), for example, an insulator 34 is added (see FIG. 2B), or the insulating layer 33 is extended inward. It may be designed to be present (for example, FIG. 2C), and since the content of this part is the same as that described above, it will not be described in duplicate. Moreover, by filling the inside of the metal shell 30, that is, between the metal shell 30 and the battery cell 40 with a heat radiating agent or a flame retardant, the heat radiating effect is enhanced, the performance of the battery is maintained, and the safety of the battery device is maintained. Can be improved.

On the other hand, in order to improve the heat dissipation effect, the battery cell 40 may further include a parallel connection type conductive holder.
See FIGS. 5A and 5B. This includes a positive electrode parallel connection type conductive holder 41 and a negative electrode parallel connection type conductive holder 42, and the positive electrode parallel connection type conductive holder 41 has a plate-shaped main body 411 and a plurality of plate-shaped extensions. The negative electrode parallel connection type conductive holder 42 includes a plate-shaped main body 421 and a plurality of plate-shaped extending portions 422. The plate-shaped extending portion 412 of the positive electrode parallel connection type conductive holder 41 is in contact with the surface of the positive electrode current collector layer 24, and the plate-shaped extending portion 422 of the negative electrode parallel connection type conductive holder 42 is the surface of the negative electrode current collector layer 25. Contact.

That is, in this embodiment, the battery units 20 of the battery cells 40 are stacked in the same direction. In other words, all of the positive electrode current collector layers 24 having the same polarity are provided upward, and both are electrically connected so as to be in direct contact with the extending portion 412 of the positive electrode parallel connection type conductive holder 41. Similarly, the negative electrode current collector layers 25 having other polarities are all oriented downward and are electrically connected so as to be in direct contact with the extending portion 422 of the negative electrode parallel connection type conductive holder 42, and the positive electrode parallel connection type conductive. The extending portion 412 of the sex holder 41 and the extending portion 422 of the negative electrode parallel connection type conductive holder 42 are arranged alternately to form a parallel connection form. Therefore, both the positive electrode parallel connection type conductive holder 41 and the negative electrode parallel connection type conductive holder 42 are made of a conductive material. At this time, in order to prevent the extending portion 412 of the positive electrode parallel connection type conductive holder 41 and the extending portion 422 of the negative electrode parallel connection type conductive holder 42 in the middle from coming into contact with each other and short-circuiting, both of them are used. An insulating plate 50 can be added between them to isolate them. By this large area contact method, the heat generated by the operation of the battery cell 40 can be effectively conducted by heat, and the optimum performance of the battery cell 40 can be maintained.

In actual application, the button type battery module 60 composed of the battery cell 40 sealed by the metal shell 30 can be regarded as one battery unit in order to obtain a sufficient amount of electricity and voltage. Further, this unit is connected in series or in parallel, or connected in series or in parallel to form a battery device.
See FIG. 6A. In the button type battery module 60 disclosed in FIG. 4 described above, a first insulating layer 71 having a first patterned conductor layer 711 and a second insulating layer 72 having a second patterned conductor layer 721 are combined. It is provided so as to face each other, that is, the first patterning conductor layer 711 and the second patterning conductor layer 721 are provided so as to face each other and face inward. By further providing the button-type battery module 60 in the middle, the positive and negative ends of the outer ends of the button-type battery module 60 are electrically connected to the first patterning conductor layer 711 and the second patterning conductor layer 721 is electrically connected. Is connected.

Further, after connecting in series with each other on the Z axis (vertical), the series may be further expanded in the X axis (horizontal) direction, that is, two or more may be stacked in different vertical axis directions. As shown in FIG. 6B, the button-type battery module 60 forms a plurality of vertical groups by forming at least one button-type battery module 60 into one vertical group, and these vertical groups are formed. The group is provided between the first insulating layer 71 and the second insulating layer 72 in a form extending in the lateral direction.
As described above, the adopted button-type battery module 60 is not limited to the one adopting the form as shown in FIG. 4, and the button-type battery modules 60 arranged in FIGS. 2, 3 or any other series or parallel form. It may be in the form of. Similarly, the laminated connection of the battery device composed of the button type battery module 60 is not limited to the form shown in FIGS. 6A and 6B, and is arbitrarily laminated and connected or expanded in any direction. It is possible to extend in the 3D direction with reference to, for example, the applicant's applications TW107135860, TW107135859, TW109203275 and the like.

To summarize the above, in the present invention, a battery cell is constructed by connecting battery units, which are individual and complete modules, in series or in parallel, or by mixing series and parallel connections, and sealing with a metal shell. The battery cell is electrically connected by directly contacting the outermost current collecting layer with the upper and lower lids of the metal shell to directly form the integrated electrodes (positive electrode end and negative electrode end) of this battery module. , Provide a button-type battery module that realizes the purpose of maximizing the current path. Further, in the battery device composed of the button-type battery module of the present invention, the button-type battery modules are vertically laminated and electrically connected by a patterned conductor layer connected across the individually vertically stacked battery modules. Since the single battery module has been yield-inspected, the difficulty of working at the inspection site is greatly reduced when assembling and assembling the battery device, and the procedure and time required for assembly are also required. It will be reduced. Further, when a problem occurs in a single battery module, it can be replaced easily, quickly and easily.

The above is merely a preferred embodiment of the present invention and is not intended to limit the scope of the present invention. Therefore, any changes or additions made by the features and technical ideas described in the scope of the utility model registration claim of the present invention are included in the scope of the utility model registration claim of the present invention.

20 Battery unit 201 Electrochemical system 21 Separator layer 22, 23 Active material layer 24 Positive electrode current collector layer 25 Negative electrode current collector layer 26 Adhesive frame 261 Modified silicone layer 262 Modified silicone layer 263 Silicone layer 30 Metal shell 31 Upper lid 32 Lower lid 33 Insulation layer 34 Insulator 40 Battery cell 41 Positive electrode parallel connection type conductive holder 411 Main body 412 Extension 42 Negative electrode parallel connection type conductive holder 421 Main body 422 Extension 50 Insulation plate 60 Button type battery module 71 First insulation Layer 711 First patterning metal layer 72 Second insulating layer 721 Second patterning metal layer

Claims (11)

A battery cell in which a plurality of battery units are stacked and connected in series or in parallel, or a mixture of series and parallel connections, and a battery cell.
It includes an electrically isolated top and bottom lid, encapsulates the battery cell inside, and the top and bottom lids are each electrically connected to different polar ends of the battery cell. This includes the metal shells that form the positive and negative ends, respectively.
Each of the battery units includes a positive electrode current collector layer and a negative electrode current collector layer provided in parallel with each other.
It is characterized by including an electrochemical system provided between the positive electrode current collector layer and the negative electrode current collector layer and including an electrolyte body which does not come into contact with each other.
Button type battery module. The button-type battery module according to claim 1, wherein the electrolyte is a gel-like, liquid, solid electrolyte or a combination thereof. The button-type battery module according to claim 2, wherein the plurality of adjacent electrochemical systems only transfer electric charges and do not perform an electrochemical reaction. The electrochemical system includes two active material layers that are provided and in contact with each of the two plate-shaped current collector layers, a separator layer that is provided between the two active material layers, and the above. The button-type battery module according to claim 1, further comprising an adhesive frame provided between two plate-shaped current collectors and surrounding the electrochemical system. The button-type battery module according to claim 1, wherein the plurality of battery units are connected in series by having the current collector layers having different polarities come into direct contact with each other. The button-type battery module according to claim 1, wherein the plurality of battery units are connected in parallel by contacting the current collector layers having the same polarity with each other. The plurality of battery units are electrically connected via a positive electrode parallel connection type conductive holder and a negative electrode parallel connection type conductive holder, and the positive electrode parallel connection type conductive holder and the negative electrode parallel connection type conductive holder. Each includes a plate-shaped body and a plurality of plate-shaped extending portions extending from the plate-shaped main body, and the plate-shaped extending portion of the positive electrode parallel connection type conductive holder is the plate-shaped extending portion in the battery cell. The plate-shaped extending portion of the negative electrode parallel connection type conductive holder is in contact with the negative electrode current collector layer in the battery cell, and the positive electrode parallel connection type conductive holder is in contact with the positive electrode current collector layer. The button-type battery module according to claim 1, wherein each of the plate-shaped main body and the plate-shaped main body of the negative electrode parallel connection type conductive holder is electrically connected to the upper lid and the lower lid. The button-type battery module according to claim 1, wherein the metal shell is filled with a heat radiating agent or a flame retardant. The button-type battery module according to claim 1, wherein the metal shell further includes an insulating layer that electrically insulates the upper lid and the lower lid. The plurality of button type battery modules according to any one of claims 1 to 9 is included.
The plurality of button cell modules are stacked in at least one vertical axis direction, and are directly electrically connected to each other via the upper lid and the lower lid on a single vertical axis direction. Characterized by being
Battery device. The plurality of button-type battery modules have a form in which two or more button-type battery modules are laminated in different vertical axis directions, further include at least one patterning conductor layer, and the at least one patterning conductor layer is laminated in the vertical axis direction. The battery device according to claim 10, wherein the plurality of button-type battery modules are electrically connected in other axial directions.

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