WO2022077961A1

WO2022077961A1 - Solid-state button battery

Info

Publication number: WO2022077961A1
Application number: PCT/CN2021/104296
Authority: WO
Inventors: 陈志勇
Original assignee: 广东微电新能源有限公司
Priority date: 2020-10-12
Filing date: 2021-07-02
Publication date: 2022-04-21
Also published as: CN213242676U

Abstract

A solid-state button battery, the solid-state button battery comprising a housing (1) and a cell (2). The housing (1) comprises a first housing (11), a second housing (12) and an insulating member (3), wherein at least one of the first housing (11) and the second housing (12) is formed with a slot structure, and the first housing (11) is fastened to the second housing (12) to form an inner cavity (10); and the insulating member (3) is arranged between the first housing (11) and the second housing (12). The cell (2) is arranged in the inner cavity (10). The cell (2) comprises positive plates (22) and negative plates (21), which are alternately arranged in a stacked manner, wherein isolation layers (23) are arranged between the positive plates (22) and the negative plates (21), which are adjacent to each other; and surfaces of the positive plates (22) and the negative plates (21) are all provided with solid-state electrolyte layers. The negative plates (21) are provided with first conductors (211), and the positive plates (22) are provided with second conductors (221), wherein the first conductors (211) are electrically connected to the first housing (11), and the second conductors (221) are electrically connected to the second housing (12). The solid-state button battery has a simple structure and high safety.

Description

Solid state button battery

technical field

The present invention relates to the technical field of button batteries, and more particularly, to a solid-state button battery.

Background technique

The current button battery uses electrolyte as a conductive medium. Due to the liquid nature of the electrolyte, it is prone to problems such as insufficient safety of electrolyte leakage, combustion and even explosion.

SUMMARY OF THE INVENTION

An object of the present invention is to provide a solid state button battery.

According to one aspect of the present invention, a solid-state button battery is provided, the solid-state button battery includes a housing and a battery cell;

The casing includes a first casing, a second casing and an insulating member, at least one of the first casing and the second casing forms a groove structure, and the first casing and the second casing form a groove structure. The two shells are snapped together to form an inner cavity, and the insulating member is arranged between the first shell and the second shell;

The battery core is arranged in the inner cavity, and the battery core includes positive electrode sheets and negative electrode sheets arranged alternately and stacked, and an isolation layer is arranged between the adjacent positive electrode sheets and the negative electrode sheets. The surface of the sheet and the negative electrode sheet is provided with a solid electrolyte layer;

The negative electrode sheet is provided with a first conductor, the positive electrode sheet is provided with a second conductor, the first conductor is electrically connected to the first casing, and the second conductor is electrically connected to the second casing.

Optionally, the first conductor includes a first branch conductor disposed on the side wall of the negative electrode sheet, the first branch conductor is electrically connected to the first casing, and the second conductor includes a first branch conductor disposed on the side wall of the negative electrode sheet. A second branch conductor on the side wall of the positive electrode sheet, the second branch conductor is electrically connected to the second casing.

Optionally, further comprising a first current collector and a second current collector, the first current collector is electrically connected to the first casing, and the second current collector is electrically connected to the second casing;

The first current collector is provided with a first conductive portion, and the first conductive portion is electrically connected to the first branch conductor;

The second current collector is provided with a second conductive portion, and the second conductive portion is electrically connected to the second branch conductor.

Optionally, the first current collector is opposite to the top of the cell, the first conductive portion is opposite to the side wall of the cell, the second current collector is opposite to the bottom of the cell, The second conductive portion is opposite to the sidewall of the cell.

Optionally, it further includes a first insulating pad and a second insulating pad, the first insulating pad is located between the first housing and the battery core, and a first escape area is provided on the first insulating pad, The first branch conductor is electrically connected to the first casing through the first escape area, the second insulating pad is located between the second casing and the battery core, and the second insulating pad is located between the second casing and the battery core. A second escape area is provided on the pad, and the second branch conductor passes through the second escape area and is electrically connected to the second shell.

Optionally, the negative electrode plate is provided with a first through hole and a second through hole, the first conductor includes a first conductor layer disposed in the first through hole, and the first conductor layer is connected to the first through hole. The first casing is electrically connected, and the second through hole is provided with a first insulating layer;

The positive electrode plate is provided with a third through hole and a fourth through hole, the second conductor includes a second conductor layer disposed in the fourth through hole, the second conductor layer and the second shell electrical connection, the third through hole is provided with a second insulating layer;

The first through hole is opposite to the third through hole to form a first channel, and the second through hole is opposite to the fourth through hole to form a second channel.

Optionally, a first conductive column is provided in the first channel, the first conductive column is electrically connected to the first conductor layer, and the first conductive column is electrically connected to the first casing, so A second conductive column is arranged in the second channel, the second conductive column is electrically connected to the second conductor layer, and the second conductive column is electrically connected to the second casing.

Optionally, the first conductive column extends out of the first channel to be electrically connected to the first casing, and the second conductive column extends out of the second channel to be electrically connected to the second casing.

Optionally, it also includes a third insulating pad and a fourth insulating pad, the third insulating pad is located between the first housing and the battery core, and a third escape area is provided on the third insulating pad, The first conductive column is electrically connected to the first casing through the third escape area, the fourth insulating pad is located between the second casing and the battery core, and the fourth insulating pad A fourth escape area is provided on the pad, and the second conductive column passes through the fourth escape area and is electrically connected to the second shell.

Optionally, the first casing includes a top plate and a first side wall, the first side wall is disposed around the top plate, the second casing includes a second side wall and a bottom plate, the second side wall The insulating member is disposed around the bottom plate, and the insulating member is disposed between the first side wall and the second side wall.

One technical effect of the present invention is that the solid-state button battery has a simple structure and is more secure.

Other features and advantages of the present invention will become apparent from the following detailed description of exemplary embodiments of the present invention with reference to the accompanying drawings.

Description of drawings

The accompanying drawings, which form a part of the specification, illustrate embodiments of the invention and together with the description serve to explain the principles of the invention.

FIG. 1 is a schematic structural diagram of a casing in a solid-state button battery according to an embodiment of the present disclosure.

FIG. 2 is one of the structural schematic diagrams of the cross-section of the solid-state button battery according to an embodiment of the present disclosure.

FIG. 3 is an enlarged view of A in FIG. 2 .

FIG. 4 is a schematic structural diagram of a cross-section of a solid-state button battery in an embodiment of the present disclosure.

FIG. 5 is a schematic structural diagram of a cross-section of a solid-state button battery in an embodiment of the present disclosure.

FIG. 6 is a schematic structural diagram of a cell in an embodiment of the present disclosure.

Description of reference numbers:

1-shell, 10-inner cavity, 11-first shell, 110-top plate, 111-first side wall, 12-second shell, 120-bottom plate, 121-second side wall, 2-cell , 21-negative electrode sheet, 211-first conductor, 211a-first branch conductor, 211b-first conductor layer, 212-first insulating layer, 22-positive electrode sheet, 221-second conductor, 221a-second branch conductor , 221b-second conductor layer, 222-second insulating layer, 23-isolation layer, 3-insulator, 41-first current collector, 42-second current collector, 43-third current collector, 44-fourth Current collector, 51-first insulating pad, 52-second insulating pad, 53-third insulating pad, 54-fourth insulating pad, 71-first conductive column, 72-second conductive column.

Detailed ways

Various exemplary embodiments of the present invention will now be described in detail with reference to the accompanying drawings. It should be noted that the relative arrangement of components and steps, numerical expressions and numerical values set forth in these embodiments do not limit the scope of the invention unless specifically stated otherwise.

The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the invention, its application, or uses.

Techniques and devices known to those of ordinary skill in the relevant art may not be discussed in detail, but where appropriate, such techniques and devices should be considered part of the specification.

In all examples shown and discussed herein, any specific values should be construed as illustrative only and not limiting. Accordingly, other instances of the exemplary embodiment may have different values.

It should be noted that like numerals and letters refer to like items in the following figures, so once an item is defined in one figure, it does not require further discussion in subsequent figures.

In an embodiment of the present disclosure, a solid-state button battery is provided, as shown in FIGS. 1-3 , the solid-state button battery includes a casing 1 and a battery cell 2 ;

The casing 1 includes a first casing 11, a second casing 12 and an insulating member 3. At least one of the first casing 11 and the second casing 12 forms a groove structure, and the first casing 11 and the second casing 12 form a groove structure. The casing 11 and the second casing 12 are buckled to form an inner cavity 10 , and the insulating member 3 is arranged between the first casing 11 and the second casing 12 ;

The battery cell 2 is arranged in the inner cavity 10 , and the battery core 2 includes positive electrode sheets 22 and negative electrode sheets 21 arranged alternately and stacked, and the adjacent positive electrode sheets 22 and the negative electrode sheets 21 are arranged between the adjacent positive electrode sheets 22 and the negative electrode sheets 21 . There is an isolation layer 23, and the surfaces of the positive electrode sheet 22 and the negative electrode sheet 21 are provided with solid electrolyte layers;

The negative electrode sheet 21 is provided with a first conductor, the positive electrode sheet 22 is provided with a second conductor, the first conductor is electrically connected to the first casing 11 , and the second conductor is connected to the second conductor. The housing 12 is electrically connected.

The numbers of the positive electrode sheets 22 and the negative electrode sheets 21 in the battery cell 2 are set according to actual requirements. The surfaces of the positive electrode sheet 22 and the negative electrode sheet 21 are coated with solid electrolyte to form a solid electrolyte layer, for example, the coated solid electrolyte may be a polymer solid electrolyte. The polymer solid electrolyte can be polyethylene oxide (PEO), polyacrylonitrile (PAN), polyvinylidene fluoride (PVDF), polymethyl methacrylate (PMMA), polypropylene oxide (PPO), polyvinylidene fluoride (PVDF) Vinyl Chloride (PVDC). The coated solid electrolyte may also be a sulfide electrolyte, an oxide electrolyte, or the like.

Each first conductor electrically connects the corresponding negative electrode sheet 21 with the first case 11 , and each second conductor electrically connects the corresponding positive electrode sheet 22 with the second case 12 , so that each of the cells 2 is electrically connected. Each negative electrode piece 21 is connected to the first casing 11 to form the negative electrode of the solid state button battery, and each positive electrode piece 22 is connected to the second housing 12 to form the positive electrode of the solid state button battery.

In this embodiment, the structure of the solid-state button battery is simple, and the solid-state electrolyte can avoid problems such as electrolyte leakage, burning and even explosion of the button battery. Improves the safety of using button batteries.

In one embodiment, as shown in FIG. 2 and FIG. 3 , the first conductor includes a first branch conductor 211 a disposed on the side wall of the negative electrode sheet 21 , and the first branch conductor 211 a is connected to the first branch conductor 211 a. A casing 11 is electrically connected, the second conductor includes a second branch conductor 221 a disposed on the side wall of the positive electrode sheet 22 , and the second branch conductor 221 a is electrically connected to the second casing 12 .

In this embodiment, the first branch conductor 211a drawn from the side wall of the negative electrode sheet 21 and the second branch conductor 221a drawn from the side wall of the positive electrode sheet 22 connect the cell 2 with the first case 11 and the second case Body 12 is turned on. The first branch conductor 211a and the second branch conductor 221a do not occupy space on the thickness of the solid-state button battery, thereby reducing the thickness and size of the solid-state button battery, making the solid-state button battery more compact and lightweight.

For example, the first branch conductor 211a and the second branch conductor 221a are both wires, the wires on the negative electrode sheet 21 are drawn out to be electrically connected to the first casing 11, and the wires on the positive electrode sheet 22 are drawn out and electrically connected to the second casing 12 connect. It can be that the wires on the pole pieces of the same polarity are electrically connected to the corresponding casing after being connected to each other, or that each wire on the pole piece is electrically connected to the corresponding casing respectively.

For example, the first branch conductor 211a and the second branch conductor 221a are both conductive parts, and the first branch conductor 211a on each negative electrode sheet 21 is electrically connected to the first casing 11 through the conductive parts. The second branch conductor 221a on each positive electrode sheet 22 is electrically connected to the second casing 12 .

In one embodiment, as shown in FIG. 2 and FIG. 3 , the solid-state button battery further includes a first current collector 41 and a second current collector 42 , and the first current collector 41 is electrically connected to the first casing 11 . , the second current collector 42 is electrically connected to the second casing 12;

The first current collector 41 is provided with a first conductive portion 411, and the first conductive portion 411 is electrically connected to the first branch conductor 211a;

The second current collector 42 is provided with a second conductive portion 421, and the second conductive portion 421 is electrically connected to the second branch conductor 221a.

The first current collector 41 is electrically connected to the first casing 11 , and the first branch conductor 211 a conducts with the first current collector 41 through the first conductive portion 411 , so that the first branch conductor 211 a and the first casing 11 are electrically connected. electrical connection structure.

The second current collector 42 is electrically connected to the second casing 42 , and the second branch conductor 221 a is electrically connected to the second current collector 42 through the second conductive portion 421 , so that the second branch conductor 221 a is electrically connected to the second casing 12 . electrical connection structure.

In this embodiment, an electrical connection is formed between the first branch conductor 211a and the first housing 11 through the first current collector 41 and the first conductive portion 411, which can simplify the structure of the first branch conductor 211a and avoid multiple first branch conductors 211a. A conductor 211a forms a complicated connection structure with the first casing 11 .

The second current collector 42 and the second conductive portion 411 form an electrical connection between the second branch conductor 221a and the second housing 12, which can simplify the structure of the second branch conductor 221a and avoid multiple second branch conductors 221a and the second branch conductor 221a. The housing 12 forms a complex connection structure.

Optionally, the first current collector 41 is opposite to the top of the battery core 2 , the first conductive portion 411 is opposite to the side wall of the battery core 2 , and the second current collector 42 is opposite to the battery core 2 . The bottom of the core 2 is opposite to each other, and the second conductive portion 421 is opposite to the side wall of the battery core 2 .

The first conductive portion 411 conducts the first branch conductor 211 a located on the side wall of the cell 2 with the partial structure of the first casing 11 located on the top of the cell 2 through the first current collector 41 . The second conductive portion 421 conducts the second branch conductor 221 a located on the side wall of the cell 2 with the partial structure of the second casing 12 located at the bottom of the cell 2 through the second current collector 42 .

In this example, the structure formed by the first current collector 41 and the first conductive portion 411 , and the structure formed by the second current collector 42 and the second conductive portion 421 occupy less space in the inner cavity 10 and save the space of the inner cavity 10 . volume of space.

For example, the cross-sections of the first current collector 41 and the first conductive portion 411 are L-shaped structures, the first current collector 41 forms one side of the L-shaped structure, and the first conductive portion 411 forms the other side. In this way, the structures of the first current collector 41 and the first conductive portion 411 can fit the structure of the cell 2 to reduce the space occupied.

The cross section of the second current collector 42 and the second conductive portion 421 is an L-shaped structure, the second current collector 42 forms one side of the L-shaped structure, and the second conductive portion 421 forms the other side. In this way, the structure of the second current collector 42 and the second conductive portion 421 can fit the structure of the cell 2 to reduce the space occupied.

In one embodiment, as shown in FIG. 2 , the solid-state button battery further includes a first insulating pad 51 and a second insulating pad 52 , the first insulating pad 51 is located between the first housing 11 and the battery Between the cores 2, the first insulating pad 51 is provided with a first escape area, the first branch conductor 211a passes through the first escape area and is electrically connected to the first shell 11, and the second The insulating pad 52 is located between the second casing 12 and the battery cell 2 , a second escape area is provided on the second insulating pad 52 , and the second branch conductor 221 a passes through the second escape area It is electrically connected to the second housing 12 .

In this embodiment, the first insulating pad 51 forms insulation between the battery cell 2 and the first casing 11 to prevent the first casing 11 and the positive electrode sheet 22 from being conductive and short-circuited, so that the first branch conductor on the negative electrode sheet 21 is not short-circuited. 211a can be electrically connected with the first casing 11 to be electrically connected. The second insulating pad 52 forms insulation between the battery cell 2 and the second casing 12 to prevent the second casing 12 and the negative electrode sheet 21 from being conductive and short-circuited, so that the second branch conductor 221a on the positive electrode sheet 22 can be connected to the second casing. The body 12 conducts to form an electrical connection.

For example, in the embodiment provided with the first current collector 41, a part of the first insulating pad 51 is located on the top of the cell 2, and the other part is located on the side wall of the cell 2, respectively on the first current collector 41 and the first conductive part Insulation is formed between 411 and the cell 2 . The first escape area is disposed on the part of the side wall of the cell 2 , so that the first branch conductor 211 a can pass through the first escape area and be electrically connected to the first conductive portion 411 . The number and specific positions of the first avoidance areas are set corresponding to the first branch conductors 211a.

In the embodiment provided with the second current collector 42, a part of the structure of the second insulating pad 52 is located at the bottom of the cell 2, and the other part is located at the side wall of the cell 2, respectively at the second current collector 42 and the second conductive part Insulation is formed between 421 and the cell 2 , and the second escape area is provided on the part of the side wall of the cell 2 , so that the second branch conductor 221 a can pass through the second escape area and be electrically connected to the second conductive portion 421 . The number and specific positions of the second avoidance areas are set corresponding to the second branch conductors 221a.

In one embodiment, as shown in FIGS. 4-6 , the negative electrode sheet 21 is provided with a first through hole and a second through hole, and the first conductor includes a first through hole disposed in the first through hole. A conductor layer 211b, the first conductor layer 211b is electrically connected to the first casing 11, and a first insulating layer 212 is provided in the second through hole;

The positive electrode sheet 22 is provided with a third through hole and a fourth through hole, the second conductor includes a second conductor layer 221b disposed in the fourth through hole, and the second conductor layer 221b is connected to the fourth through hole. The two housings 12 are electrically connected, and the third through hole is provided with a second insulating layer 222;

The first through hole is opposite to the third through hole to form a first channel, and the second through hole is opposite to the fourth through hole to form a second channel. In the first channel, only the first conductor layer 211b is connected to the negative electrode sheet 21, and the third through hole on the positive electrode sheet 22 is provided with a second insulating layer 222 to form insulation. The second channel can only conduct conduction with the positive electrode sheet 22 through the second conductor layer 221b, and a first insulating layer 212 is provided in the second through hole of the negative electrode sheet 21 to form insulation.

In this embodiment, through holes are provided on the positive electrode sheet 22 and the negative electrode sheet 21, and a conductor layer is provided in the corresponding through hole, so that the conductor layer is connected to the corresponding casing. In this way, it is not necessary to provide a structure for conducting the positive electrode sheet 22 and the second casing 12 from the outside of the battery cell 2, and there is no need to provide a structure for conducting the negative electrode sheet 21 and the first casing 12 outside the battery cell 2, which reduces the need for The space occupied by the structure inside the solid-state button battery can reduce the volume of the solid-state button battery.

Optionally, the first channel is provided with a first conductive column 71, the first conductive column 71 is electrically connected to the first conductor layer 211b, and the first conductive column 71 is connected to the first casing 11 Electrical connection, the second channel is provided with a second conductive column 72, the second conductive column 72 is electrically connected to the second conductor layer 221b, and the second conductive column 72 is connected to the second shell 12 Electrical connections.

The first conductive pillars 71 can conduct electrical connection between all the first conductor layers 211b in the first channel and the first casing 11 , so that the electrical connection structure between the negative electrode sheet 21 and the first casing 11 is simpler. The second conductive pillars 72 can conduct electrical connection between all the second conductor layers 221b in the second channel and the second casing 12 , so that the electrical connection structure between the positive electrode sheet 22 and the second casing 12 is simpler.

For example, the first case 11 only needs to be electrically connected to the first conductive pillars 71 , and can be electrically connected to all the negative electrode sheets 21 , and the second case 12 only needs to be electrically connected to the second conductive pillars 72 , and can be electrically connected to all the positive electrode sheets 22 is on.

In one embodiment, the first conductive post 71 protrudes from the first channel to be electrically connected to the first housing 11 , and the second conductive post 72 protrudes from the second channel and the second The housing 12 is electrically connected.

The extension of the first conductive column 71 from the first channel can make the electrical connection structure between the first conductive column 71 and the first casing 11 simpler, and no additional structure is required. The second conductive column 72 extending out of the second channel makes the electrical connection structure between the second conductive column 72 and the second casing 12 simpler, and no additional structure is required.

In one embodiment, as shown in FIG. 4 , the solid-state button battery further includes a third insulating pad 53 and a fourth insulating pad 54 , and the third insulating pad 53 is located between the first housing 11 and the battery cell. 2, the third insulating pad 53 is provided with a third escape area, the first conductive post 71 is electrically connected to the first housing 11 through the third escape area, and the fourth insulating The pad 54 is located between the second casing 12 and the battery core 2 , a fourth escape area is provided on the fourth insulating pad 54 , and the second conductive column 72 passes through the fourth escape area and The second housing 12 is electrically connected.

In this embodiment, the third insulating pad 53 forms insulation between the battery cell 2 and the first casing 11 to avoid short circuit between the positive electrode sheet 22 of the battery cell 2 and the first casing 11 . The third escape area prevents the third insulating pad 53 from affecting the electrical connection between the first conductive pillar 71 and the first casing 11 . The fourth insulating pad 54 can prevent the negative electrode sheet 21 of the battery cell 2 from being short-circuited with the second casing 12 . The fourth escape area prevents the fourth insulating pad 54 from affecting the electrical connection between the second conductive pillar 72 and the second casing 12 .

The direct electrical connection between the first conductive column 71 and the first casing 11 and the direct electrical connection between the second conductive column 72 and the second casing 12 can save the space of the inner cavity 10 .

Optionally, as shown in FIG. 5 , a third current collector 43 is disposed between the third insulating pad 53 and the first casing 11 , and the first conductive column 71 forms an electrical connection with the first casing 11 through the third current collector 43 . connect. A fourth current collector 44 is disposed between the fourth insulating pad 54 and the second casing 12 , and the second conductive column 72 is electrically connected to the second casing 12 through the fourth current collector 44 .

The provision of the third current collector 43 can increase the structural strength between the first conductive column 71 and the first casing 11 . The fourth current collector 44 can increase the structural strength between the second conductive pillars 72 and the second casing 12 .

In one embodiment, as shown in FIGS. 2-5 , the first housing 11 includes a top plate 110 and a first side wall 111 , the first side wall 111 is disposed around the top plate 110 , and the second The housing 12 includes a second side wall 121 and a bottom plate 120 , the second side wall 121 is disposed around the bottom plate 120 , and the insulating member 3 is disposed between the first side wall 111 and the second side wall 121 . between.

In this embodiment, the top plate 110 and the first side wall 111 are enclosed to form a groove structure of the first casing 11 , the bottom plate 120 and the second side wall 121 are enclosed to form a groove structure of the second casing 12 , the first The casing 11 and the second casing 12 are snapped together to form an inner cavity.

The negative electrode sheet 21 in the battery cell 2 is electrically connected to the top plate 110 through the first conductor, so that the top plate 110 has a negative polarity. The positive electrode sheet 22 is electrically connected to the base plate 120 through the second conductor, so that the base plate 120 has a positive polarity.

For example, a part of the structure on the top plate 110 is exposed to the outside of the casing 1 and can be electrically connected, and the negative electrode sheet 21 is electrically connected to the part of the structure, so that the part of the structure forms the negative electrode of the battery. A part of the structure on the bottom plate 120 is exposed to the outside of the casing 1 and can be electrically connected, and the positive electrode sheet 22 is electrically connected to the part of the structure, so that the part of the structure forms the positive electrode of the battery.

The above embodiments focus on the differences between the various embodiments. As long as the different optimization features between the various embodiments are not contradictory, they can be combined to form a better embodiment. Repeat.

While some specific embodiments of the present invention have been described in detail by way of example, those skilled in the art will appreciate that the above examples are provided for illustration only and not for the purpose of limiting the scope of the invention. Those skilled in the art will appreciate that modifications may be made to the above embodiments without departing from the scope and spirit of the present invention. The scope of the invention is defined by the appended claims.

Claims

A solid-state button battery, characterized in that it includes a shell and a battery cell;

The casing includes a first casing, a second casing and an insulating member, at least one of the first casing and the second casing forms a groove structure, and the first casing and the second casing form a groove structure. The two shells are snapped together to form an inner cavity, and the insulating member is arranged between the first shell and the second shell;

The battery core is arranged in the inner cavity, and the battery core includes positive electrode sheets and negative electrode sheets arranged alternately and stacked, and an isolation layer is arranged between the adjacent positive electrode sheets and the negative electrode sheets. The surface of the sheet and the negative electrode sheet is provided with a solid electrolyte layer;

The negative electrode sheet is provided with a first conductor, the positive electrode sheet is provided with a second conductor, the first conductor is electrically connected to the first casing, and the second conductor is electrically connected to the second casing.
The solid-state button battery according to claim 1, wherein the first conductor comprises a first branch conductor disposed on the side wall of the negative electrode sheet, and the first branch conductor is connected to the first shell. For electrical connection, the second conductor includes a second branch conductor disposed on the side wall of the positive electrode sheet, and the second branch conductor is electrically connected to the second casing.
The solid-state button battery according to claim 1 or 2, further comprising a first current collector and a second current collector, the first current collector is electrically connected to the first casing, and the second current collector is the fluid is electrically connected to the second housing;

The first current collector is provided with a first conductive portion, and the first conductive portion is electrically connected to the first branch conductor;

The second current collector is provided with a second conductive portion, and the second conductive portion is electrically connected to the second branch conductor.
The solid-state button battery according to any one of claims 1-3, wherein the first current collector is opposite to the top of the cell, and the first conductive portion is opposite to the side wall of the cell , the second current collector is opposite to the bottom of the battery core, and the second conductive portion is opposite to the side wall of the battery core.
The solid-state button battery according to any one of claims 1-4, further comprising a first insulating pad and a second insulating pad, wherein the first insulating pad is located between the first shell and the battery cell A first escape area is provided on the first insulating pad, the first branch conductor passes through the first escape area and is electrically connected to the first shell, and the second insulating pad is located in the first escape area. Between the two casings and the battery core, a second escape area is provided on the second insulating pad, and the second branch conductor passes through the second escape area and is electrically connected to the second casing.
The solid-state button battery according to any one of claims 1-5, wherein the negative electrode plate is provided with a first through hole and a second through hole, and the first conductor comprises a first through hole provided in the first through hole. a first conductor layer inside, the first conductor layer is electrically connected with the first casing, and a first insulating layer is arranged in the second through hole;

The positive electrode plate is provided with a third through hole and a fourth through hole, the second conductor includes a second conductor layer disposed in the fourth through hole, the second conductor layer and the second shell electrical connection, the third through hole is provided with a second insulating layer;

The first through hole is opposite to the third through hole to form a first channel, and the second through hole is opposite to the fourth through hole to form a second channel.
The solid-state button battery according to any one of claims 1-6, wherein a first conductive column is provided in the first channel, and the first conductive column is electrically connected to the first conductor layer, so The first conductive column is electrically connected to the first shell, the second channel is provided with a second conductive column, the second conductive column is electrically connected to the second conductor layer, and the second conductive column is is electrically connected to the second housing.
The solid-state button battery according to any one of claims 1-7, wherein the first conductive column extends out of the first channel and is electrically connected to the first casing, and the second conductive column extends The second channel is electrically connected to the second casing.
The solid-state button battery according to any one of claims 1-8, further comprising a third insulating pad and a fourth insulating pad, wherein the third insulating pad is located between the first shell and the battery cell In between, a third escape area is provided on the third insulating pad, the first conductive column passes through the third escape area and is electrically connected to the first shell, and the fourth insulating pad is located in the third escape area. Between the two casings and the battery core, a fourth escape area is provided on the fourth insulating pad, and the second conductive column passes through the fourth escape area and is electrically connected to the second casing.
The solid-state button battery according to any one of claims 1-9, wherein the first casing comprises a top plate and a first side wall, the first side wall is disposed around the top plate, and the second The housing includes a second side wall and a bottom plate, the second side wall is arranged around the bottom plate, and the insulating member is arranged between the first side wall and the second side wall.