Preparation method of dry-method solid-state battery and dry-method solid-state battery

Abstract

The invention relates to the technical field of battery thermal management, and particularly discloses a preparation method of a dry-method solid-state battery and the dry-method solid-state battery, the dry-method solid-state battery comprises a side package bin, two groups of sealing plates, a liquid inlet pipe, a liquid discharge pipe group and a connecting unit, the two groups of sealing plates are respectively arranged at the upper end and the lower end of the side package bin, and a cavity is filled with electrolyte, a positive electrode and a negative electrode; each group of sealing plates comprises a heat dissipation plate and a cover plate, each group of heat dissipation plates is provided with a main flow channel, the main flow channel is a different-diameter channel, micro-channels are arranged on two sides of the main flow channel, each micro-channel is provided with a plurality of groups of communicating holes, and the plurality of groups of communicating holes are communicated with the micro-channels and the backflow cavity. A vein-imitating structure is adopted, the heat dissipation area is increased through a fractal structure, the heat dissipation efficiency is remarkably improved through the high heat exchange coefficient characteristic of jet flow impact, fluid distribution is optimized through a fractal network, and the purposes of efficient heat dissipation, excellent temperature uniformity and low energy consumption are achieved in combination with the jet flow impact and the gradually-shrinking and gradually-expanding flow channel design.

Description

Technical Field

[0001] The present invention relates to the technical field of battery thermal management, and in particular to a preparation method of a dry-process solid-state battery and a dry-process solid-state battery. Background Art

[0002] At present, dry solid-state batteries are a new type of lithium battery technology that uses solid-state electrolytes instead of traditional liquid electrolytes. They have the significant advantages of high energy density, high safety and long cycle life, and have broad application prospects in the fields of new energy vehicles and energy storage. Since solid-state batteries generate heat during the charging and discharging process, if the heat cannot be discharged in time, the solid-state battery pack will cause the temperature to be too high. Long-term high temperature will reduce the electrochemical performance of the solid-state battery pack and affect the capacity and output power of the solid-state battery. In order to ensure the normal use of the solid-state battery pack, a heat dissipation structure is required to dissipate the heat of the solid-state battery pack in time.

[0003] The prior art CN119542615A provides a solid-state battery pack heat dissipation structure, which places the solid-state battery pack in a housing, and then inserts the heat dissipation tube parallel to each other from top to bottom between adjacent rows of battery cells. Due to the rotating setting of the rotating tube section, when the heat dissipation tube is inserted from top to bottom, the friction between the heat dissipation tube and the battery cell is in the form of rolling friction plus sliding friction, thereby reducing the friction resistance between the heat dissipation tube and the battery cell, which is conducive to improving the labor-saving and simplicity of installing the heat dissipation tube; when the battery cell is in the charge and discharge state, the coolant is passed through the heat dissipation tube. The first end of the heat pipe is passed into the interior of the heat dissipation pipe, so that the coolant flows along the extension direction of the heat dissipation pipe while absorbing the heat of the battery cell to prevent the battery cell from overheating, and the coolant is finally discharged from the second end of the heat dissipation pipe; when any battery cell is damaged, the battery cell is pulled out from the shell from bottom to top. Due to the rotating setting of the rotating tube section, when the battery cell is pulled out, the friction between the heat dissipation pipe and the battery cell is in the form of rolling friction plus sliding friction, thereby reducing the frictional resistance between the heat dissipation pipe and the battery cell, which is conducive to improving the labor-saving and simplicity of removing the battery cell.

[0004] However, in the prior art, heat is dissipated through an external bottom box, which dissipates heat from the metal shell of the solid raw material, thereby achieving the purpose of indirect heat dissipation of the solid raw material. The heat dissipation process needs to be conducted through the metal shell, resulting in poor heat dissipation efficiency, and the provision of the bottom box will increase the installation space of the solid-state battery pack. Summary of the Invention

[0005] The purpose of the present invention is to provide a preparation method of a dry solid-state battery and a dry solid-state battery, aiming to solve the technical problems in the prior art of heat dissipation through an external bottom box, which dissipates heat from the metal shell of the solid raw material, thereby achieving the purpose of indirect heat dissipation of the solid raw material. The heat dissipation process needs to be conducted through the metal shell, resulting in poor heat dissipation efficiency, and the setting of the bottom box will cause the installation space of the solid-state battery pack to increase.

[0006] To achieve the above-mentioned purpose, the present invention adopts a dry solid-state battery, including a side package, a sealing plate, a liquid inlet pipe, a liquid discharge pipe group and a connecting unit, the number of the sealing plate is two groups, the two groups of sealing plates are respectively arranged at the upper and lower ends of the side package, and the two groups of sealing plates cover the side package to form a cavity, the interior of the cavity is filled with electrolyte, positive electrode and negative electrode, the number of the liquid inlet pipe is two groups, each group of the liquid inlet pipe is respectively connected to the corresponding sealing plate, and is respectively located on one side of the corresponding sealing plate, the number of the liquid discharge pipe group is two groups, each group of the liquid discharge pipe group is respectively connected to the corresponding The sealing plates are connected and are respectively located on one side of the corresponding sealing plates, and the drainage pipe group is arranged opposite to the liquid inlet pipe. There are two groups of connecting units, and each group of connecting units is respectively arranged on one side of the side package bin. Each group of sealing plates includes a heat dissipation plate and a cover plate. Each group of heat dissipation plates has a main channel, and the main channel is a channel of different diameters. Microchannels are arranged on both sides of the main channel, and the microchannels have multiple groups of connecting holes. Multiple groups of connecting holes connect the microchannels with the reflux chamber. The cover plate is arranged above the heat dissipation plate, and the cover plate covers the heat dissipation plate.

[0007] Wherein, each group of the sealing plates further includes a guide plate, and the number of the guide plates is multiple groups, and each group of the guide plates is fixedly connected to the heat dissipation plate and is respectively located inside the reflux chamber.

[0008] The input end of each group of liquid inlet pipes is in a circular tube structure, and the output end of each group of liquid inlet pipes is in a wedge-shaped semicircular structure.

[0009] Wherein, each group of the drain pipe groups includes an upper drain cover, a lower drain cover and a tee pipe, the upper drain cover is connected to one end of the tee pipe, the lower drain cover is connected to the other end of the tee pipe, and the upper drain cover and the lower drain cover are respectively arranged on one side of the heat dissipation plate.

[0010] Wherein, each group of the drain pipe group further includes a flange ring, which is fixedly connected to the tee pipe and sleeved on the outer wall of the tee pipe, and the flange ring is located at one end away from the upper drain cover and the lower drain cover.

[0011] Among them, each group of the connecting units includes a first positive L-plate, a first negative L-plate, a clamping column and a first bolt. The first positive L-plate and the first negative L-plate are respectively disassembled and fixed to the two sides of the side package bin by the first bolts. The first negative L-plate has a clamping hole. There are two groups of clamping columns. The two groups of clamping columns are respectively fixedly connected to the first positive L-plate and are respectively located at the upper end of the first positive L-plate, and the clamping columns and the clamping holes are adapted to each other.

[0012] Among them, each group of the connecting units includes a mounting plate group, a second bolt, a first rotating plate and a second rotating plate, the first rotating plate is rotatably connected to the second rotating plate, and one end of the first rotating plate is embedded in the interior of the second rotating plate, the number of the mounting plate groups is two groups, the two groups of the mounting plate groups are respectively fixedly connected to the corresponding first rotating plate and the second rotating plate, and are respectively located on one side of the corresponding first rotating plate and the second rotating plate, the number of the second bolts is multiple groups, each group of the second bolts passes through the corresponding mounting plate group, and are respectively adapted to the side bag compartment.

[0013] Among them, each group of the mounting plate group includes a plate body, an elastic folding piece, a first rib and a second rib, one end of the elastic folding piece is fixedly connected to the plate body and is located on one side of the plate body, the first rib is fixedly connected to the elastic folding piece and is located on one side of the elastic folding piece, and the second rib is fixedly connected to the elastic folding piece and is located on one side of the elastic folding piece.

[0014] Among them, each group of the connecting units includes a second positive L-plate, a second negative L-plate, a third bolt, a mother plate and a male plate, and the number of the third bolts is multiple groups. The second positive L-plate and the second negative L-plate are respectively detachably connected to the side package bin through the third bolts. The mother plate is fixedly connected to the second positive L-plate and is located at the upper end of the second positive L-plate. The male plate is fixedly connected to the second negative L-plate and is located at the lower end of the second negative L-plate, and the mother plate and the male plate are adapted to each other.

[0015] The present invention also provides a method for preparing a dry solid-state battery, which is used to prepare the dry solid-state battery as described above, comprising the following steps: Connecting and sealing the heat dissipation plate and the cover plate to form the sealing plate; Fixing a set of the sealing plates to the lower end of the side packaging bin; Selecting positive electrode materials to prepare positive electrode material powder by mechanical mixing, and pressing the positive electrode material powder into sheets to prepare positive electrode sheets; Selecting negative electrode materials to prepare negative electrode material powder by mechanical mixing, and pressing the negative electrode material powder into sheets to prepare negative electrode sheets; Selecting a solid electrolyte material to prepare a solid electrolyte powder by mechanical mixing, and pressing the solid electrolyte powder into a tablet to prepare a solid electrolyte sheet; The positive electrode sheet, the negative electrode sheet and the solid electrolyte sheet prepared above are stacked, and the stacked laminated battery core is subjected to hot pressing and melting treatment in a hot press; Placing the processed laminated battery cells between the side packaging compartments and the sealing plates, and then covering and packaging them with another set of sealing plates; The packaged solid-state battery is charged and discharged in an inert atmosphere; Static pressure is applied to the packaged solid-state battery again to complete the preparation of the dry solid-state battery.

[0016] The present invention provides a preparation method of a dry solid-state battery and a dry solid-state battery, which is composed of two groups of sealing plates and the side packaging compartments to form the cavity for placing electrolytes, positive electrodes, and negative electrodes, and the battery cells are placed in the cavity. Each group of sealing plates is composed of the heat dissipation plate and the cover plate. When multiple groups of solid-state batteries are arranged in an array during use, the sealing plates and the side packaging compartments are first installed and fixed, and then the adjacent liquid inlet pipes and the liquid discharge pipe groups are connected using connecting pipes and connected to the liquid cooling circulation system. Finally, the two groups of solid-state battery arrays are connected through the connecting unit. When water cooling is in operation, the cooling medium enters the main channel between the heat dissipation plate and the cover plate through the liquid inlet pipe. Since the diameter of the pipe at the input end is larger than the diameter of the pipe at the output end, the change in pipe diameter causes the output The outlet pressure increases to control the flow rate, and the cooling medium flows into the microchannels on both sides of the main channel, and flows into the reflux chamber through the connecting holes at the end of each group of tributaries of the microchannel. The drain pipe group discharges the cooling medium in the reflux chamber and the main channel, and a reflux channel for the cooling medium is formed through the reflux chamber. The microchannel directly exchanges heat with the cover plate, and then cools the solid-state battery cell at the other end of the cover plate. The microchannel adopts a leaf vein-like structure, increases the heat dissipation area through a fractal structure, and utilizes the high heat transfer coefficient characteristics of jet impact to significantly improve the heat dissipation efficiency. By optimizing the fluid distribution through a fractal network and combining jet impact and gradually converging and expanding flow channel design, the goals of efficient heat dissipation, excellent temperature uniformity and low energy consumption are achieved. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0018] Figure 1It is a structural diagram of the first embodiment of the present invention.

[0019] Figure 2 is a side view of the first embodiment of the present invention.

[0020] Figure 3 The present invention Figure 2 AA line internal structure cross-sectional view.

[0021] Figure 4 The present invention Figure 3 BB line internal structure cross-sectional view.

[0022] Figure 5 It is a structural schematic diagram of the heat dissipation plate of the present invention.

[0023] Figure 6 It is a structural diagram of the second embodiment of the present invention.

[0024] Figure 7 It is a cross-sectional view of the internal structure of the second embodiment of the present invention.

[0025] Figure 8 2 is a schematic structural diagram of a third embodiment of the present invention.

[0026] Figure 9 It is a front view of the third embodiment of the present invention.

[0027] Figure 10 The present invention Figure 9 A magnified view of the local structure at point C.

[0028] Figure 11 is a flow chart of the method steps of the fourth embodiment of the present invention.

[0029] 1-side package compartment, 2-liquid inlet pipe, 3-heat dissipation plate, 4-cover plate, 5-main channel, 6-microchannel, 7-connecting hole, 8-reflux chamber, 9-guide plate, 10-upper drainage cover, 11-lower drainage cover, 12-tee pipe, 13-flange ring, 101-first positive L-plate, 102-first reverse L-plate, 103-clamping column, 104-first bolt, 105-clamping hole, 201-second bolt, 202-first rotating plate, 203-second rotating plate, 204-plate body, 205-elastic folding piece, 206-first rib, 207-second rib, 301-second positive L-plate, 302-second reverse L-plate, 303-third bolt, 304-mother plate, 305-male plate. DETAILED DESCRIPTION

[0030] The first embodiment of this application is: See also Figures 1 to 5The present invention provides a dry solid-state battery: comprising a side package 1, a sealing plate, a liquid inlet pipe 2, a liquid drain pipe group and a connecting unit, wherein the number of the sealing plates is two groups, and the two groups of sealing plates are respectively arranged at the upper and lower ends of the side package 1, and the two groups of sealing plates cover the side package 1 to form a cavity, and the interior of the cavity is filled with electrolyte, positive electrode and negative electrode, the number of the liquid inlet pipe 2 is two groups, and each group of the liquid inlet pipe 2 is respectively connected to the corresponding sealing plate and is respectively located on one side of the corresponding sealing plate, the number of the liquid drain pipe group is two groups, and each group of the liquid drain pipe group is respectively connected to the corresponding sealing plate and is respectively Located on one side of the corresponding sealing plate, and the drainage pipe group is arranged opposite to the liquid inlet pipe 2, the number of the connecting units is two groups, each group of the connecting units is respectively arranged on one side of the side package bin 1, each group of the sealing plate includes a heat dissipation plate 3 and a cover plate 4, each group of the heat dissipation plate 3 has a main channel 5, the main channel 5 is a channel of different diameters, microchannels 6 are arranged on both sides of the main channel 5, and the microchannel 6 has multiple groups of connecting holes 7, multiple groups of the connecting holes 7 connect the microchannel 6 with the reflux chamber 8, the cover plate 4 is arranged above the heat dissipation plate 3, and the cover plate 4 covers the heat dissipation plate 3.

[0031] In this embodiment, the two groups of sealing plates and the side packaging chamber 1 constitute the cavity for placing the electrolyte, positive electrode, and negative electrode, and the battery cell is placed in the cavity. Each group of sealing plates is composed of the heat dissipation plate 3 and the cover plate 4. When multiple groups of solid-state batteries are arranged in an array during use, the sealing plates and the side packaging chamber 1 are first installed and fixed, and then the adjacent liquid inlet pipes 2 and the liquid discharge pipe group are connected using connecting pipes and connected to the liquid cooling circulation system. Finally, the two groups of solid-state battery arrays are connected through the connecting unit. When water cooling is in operation, the cooling medium enters the main channel 5 between the heat dissipation plate 3 and the cover plate 4 through the liquid inlet pipe 2. Since the diameter of the pipe at the input end is larger than the diameter of the pipe at the output end, the change in pipe diameter causes the pressure at the output end to increase, thereby controlling The flow rate is high, and the cooling medium flows into the microchannels 6 on both sides of the main channel 5, and flows into the reflux chamber 8 through the connecting holes 7 at the end of each group of tributaries of the microchannel 6. The drain pipe group discharges the cooling medium in the reflux chamber 8 and the main channel 5, and forms a reflux channel for the cooling medium through the reflux chamber 8. The microchannel 6 directly exchanges heat with the cover plate 4, and then cools the solid-state battery cell at the other end of the cover plate 4. The microchannel 6 adopts an imitation leaf vein structure, increases the heat dissipation area through a fractal structure, and utilizes the high heat transfer coefficient characteristics of jet impact to significantly improve the heat dissipation efficiency. The fractal network optimizes fluid distribution, combines jet impact and gradually convergent and divergent flow channel design to achieve the goals of efficient heat dissipation, excellent temperature uniformity and low energy consumption.

[0032] Furthermore, each group of the sealing plates further includes a guide plate 9 , and the guide plates 9 are in multiple groups. Each group of the guide plates 9 is fixedly connected to the heat dissipation plate 3 and is located inside the reflux chamber 8 .

[0033] In this embodiment, multiple groups of guide plates 9 are arranged in the reflux chamber 8 to guide the cooling medium that flows back into the reflux chamber 8 through the connecting hole 7, so as to avoid disrupting the flow direction of the medium in the reflux chamber 8, so that the reflux of the cooling medium is smoother and no turbulence or disturbance is formed.

[0034] Furthermore, the input end of each group of the liquid inlet pipes 2 is a circular tube structure, and the output end of each group of the liquid inlet pipes 2 is a wedge-shaped semicircular structure.

[0035] In this embodiment, the input end of the liquid inlet pipe 2 is changed from a circular pipe to a wedge-shaped semicircle, and the cooling medium inside is squeezed by the diameter change of the pipe body, thereby increasing the pressure and flow rate, thereby improving the heat dissipation rate.

[0036] Furthermore, each group of the drain pipe groups includes an upper drain cover 10, a lower drain cover 11 and a three-way pipe 12, the upper drain cover 10 is connected to one end of the three-way pipe 12, the lower drain cover 11 is connected to the other end of the three-way pipe 12, and the upper drain cover 10 and the lower drain cover 11 are respectively arranged on one side of the heat dissipation plate 3.

[0037] In this embodiment, the upper drain cover 10 is used to discharge the cooling medium flowing out of the main channel 5, and the lower drain cover 11 is used to discharge the cooling medium discharged from the reflux chamber 8. The cooling medium discharged by the upper drain cover 10 and the lower drain cover 11 are both discharged through the three-way pipe 12.

[0038] Furthermore, each set of the drain pipe group also includes a flange ring 13, which is fixedly connected to the tee pipe 12 and sleeved on the outer wall of the tee pipe 12, and the flange ring 13 is located at one end away from the upper drain cover 10 and the lower drain cover 11.

[0039] In this embodiment, the three-way pipe 12 can be connected to the liquid inlet pipe 2 of the next solid-state battery or to the cooling circulation system through the flange ring 13, thereby improving the connection stability and reliability of the drain pipe group.

[0040] Furthermore, each group of the connecting units includes a first positive L-plate 101, a first negative L-plate 102, a clamping column 103 and a first bolt 104. The first positive L-plate 101 and the first negative L-plate 102 are respectively disassembled and fixed to the two sides of the side bag compartment 1 by the first bolts 104. The first negative L-plate 102 has a clamping hole 105. The number of the clamping columns 103 is two groups. The two groups of the clamping columns 103 are respectively fixedly connected to the first positive L-plate 101 and are respectively located at the upper end of the first positive L-plate 101, and the clamping columns 103 and the clamping holes 105 are adapted to each other.

[0041] In this embodiment, when connecting multiple groups of solid-state batteries in an array, the head end of one group of solid-state batteries is connected to the end of another group of solid-state batteries. During the connection, the first reverse L-plate 102 is covered on the first positive L-plate 101, and one end of each group of the clamping columns 103 passes through the corresponding clamping holes 105, thereby realizing the array clamping between the two groups of solid-state batteries, which can effectively keep the solid-state batteries installed neatly, and can also effectively prevent the connecting pipe between the liquid inlet pipe 2 and the liquid discharge pipe group from being pulled off, thereby playing an effective limiting role.

[0042] The second embodiment of this application is: See also Figure 6 and Figure 7 The present invention provides a dry solid-state battery: comprising a side package 1, a sealing plate, a liquid inlet pipe 2, a liquid drain pipe group and a connecting unit, wherein the number of the sealing plates is two groups, and the two groups of sealing plates are respectively arranged at the upper and lower ends of the side package 1, and the two groups of sealing plates cover the side package 1 to form a cavity, and the interior of the cavity is filled with electrolyte, positive electrode and negative electrode, the number of the liquid inlet pipe 2 is two groups, and each group of the liquid inlet pipe 2 is respectively connected to the corresponding sealing plate and is respectively located on one side of the corresponding sealing plate, the number of the liquid drain pipe group is two groups, and each group of the liquid drain pipe group is respectively connected to the corresponding sealing plate and is respectively Located on one side of the corresponding sealing plate, and the drainage pipe group is arranged opposite to the liquid inlet pipe 2, the number of the connecting units is two groups, each group of the connecting units is respectively arranged on one side of the side package bin 1, each group of the sealing plate includes a heat dissipation plate 3 and a cover plate 4, each group of the heat dissipation plate 3 has a main channel 5, the main channel 5 is a channel of different diameters, microchannels 6 are arranged on both sides of the main channel 5, and the microchannel 6 has multiple groups of connecting holes 7, multiple groups of the connecting holes 7 connect the microchannel 6 with the reflux chamber 8, the cover plate 4 is arranged above the heat dissipation plate 3, and the cover plate 4 covers the heat dissipation plate 3.

[0043] In this embodiment, the two groups of sealing plates and the side packaging chamber 1 constitute the cavity for placing the electrolyte, positive electrode, and negative electrode, and the battery cell is placed in the cavity. Each group of sealing plates is composed of the heat dissipation plate 3 and the cover plate 4. When multiple groups of solid-state batteries are arranged in an array during use, the sealing plates and the side packaging chamber 1 are first installed and fixed, and then the adjacent liquid inlet pipes 2 and the liquid discharge pipe group are connected using connecting pipes and connected to the liquid cooling circulation system. Finally, the two groups of solid-state battery arrays are connected through the connecting unit. When water cooling is in operation, the cooling medium enters the main channel 5 between the heat dissipation plate 3 and the cover plate 4 through the liquid inlet pipe 2. Since the diameter of the pipe at the input end is larger than the diameter of the pipe at the output end, the change in pipe diameter causes the pressure at the output end to increase, thereby controlling The flow rate is high, and the cooling medium flows into the microchannels 6 on both sides of the main channel 5, and flows into the reflux chamber 8 through the connecting holes 7 at the end of each group of tributaries of the microchannel 6. The drain pipe group discharges the cooling medium in the reflux chamber 8 and the main channel 5, and forms a reflux channel for the cooling medium through the reflux chamber 8. The microchannel 6 directly exchanges heat with the cover plate 4, and then cools the solid-state battery cell at the other end of the cover plate 4. The microchannel 6 adopts an imitation leaf vein structure, increases the heat dissipation area through a fractal structure, and utilizes the high heat transfer coefficient characteristics of jet impact to significantly improve the heat dissipation efficiency. The fractal network optimizes fluid distribution, combines jet impact and gradually convergent and divergent flow channel design to achieve the goals of efficient heat dissipation, excellent temperature uniformity and low energy consumption.

[0044] Furthermore, each group of the sealing plates further includes a guide plate 9 , and the guide plates 9 are in multiple groups. Each group of the guide plates 9 is fixedly connected to the heat dissipation plate 3 and is located inside the reflux chamber 8 .

[0045] In this embodiment, multiple groups of guide plates 9 are arranged in the reflux chamber 8 to guide the cooling medium that flows back into the reflux chamber 8 through the connecting hole 7, so as to avoid disrupting the flow direction of the medium in the reflux chamber 8, so that the reflux of the cooling medium is smoother and no turbulence or disturbance is formed.

[0046] Furthermore, the input end of each group of the liquid inlet pipes 2 is a circular tube structure, and the output end of each group of the liquid inlet pipes 2 is a wedge-shaped semicircular structure.

[0047] In this embodiment, the input end of the liquid inlet pipe 2 is changed from a circular pipe to a wedge-shaped semicircle, and the cooling medium inside is squeezed by the diameter change of the pipe body, thereby increasing the pressure and flow rate, thereby improving the heat dissipation rate.

[0048] Furthermore, each group of the drain pipe groups includes an upper drain cover 10, a lower drain cover 11 and a three-way pipe 12, the upper drain cover 10 is connected to one end of the three-way pipe 12, the lower drain cover 11 is connected to the other end of the three-way pipe 12, and the upper drain cover 10 and the lower drain cover 11 are respectively arranged on one side of the heat dissipation plate 3.

[0049] In this embodiment, the upper drain cover 10 is used to discharge the cooling medium flowing out of the main channel 5, and the lower drain cover 11 is used to discharge the cooling medium discharged from the reflux chamber 8. The cooling medium discharged by the upper drain cover 10 and the lower drain cover 11 are both discharged through the three-way pipe 12.

[0050] Furthermore, each set of the drain pipe group also includes a flange ring 13, which is fixedly connected to the tee pipe 12 and sleeved on the outer wall of the tee pipe 12, and the flange ring 13 is located at one end away from the upper drain cover 10 and the lower drain cover 11.

[0051] In this embodiment, the three-way pipe 12 can be connected to the liquid inlet pipe 2 of the next solid-state battery or to the cooling circulation system through the flange ring 13, thereby improving the connection stability and reliability of the drain pipe group.

[0052] Furthermore, each group of the connecting units includes a mounting plate group, a second bolt 201, a first rotating plate 202 and a second rotating plate 203, the first rotating plate 202 is rotatably connected to the second rotating plate 203, and one end of the first rotating plate 202 is embedded in the interior of the second rotating plate 203, the number of the mounting plate groups is two groups, the two groups of the mounting plate groups are respectively fixedly connected to the corresponding first rotating plate 202 and the second rotating plate 203, and are respectively located on one side of the corresponding first rotating plate 202 and the second rotating plate 203, the number of the second bolts 201 is multiple groups, each group of the second bolts 201 respectively passes through the corresponding mounting plate group, and respectively adapts to the side bag compartment 1.

[0053] In this embodiment, when connecting multiple groups of solid-state batteries in an array, the two groups of mounting plate groups are respectively installed between the two groups of solid-state batteries through the second bolts 201, and the angle between the first rotating plate 202 and the second rotating plate 203 can be adjusted, so that the angle of the two groups of solid-state batteries can be adjusted according to the use requirements when they are installed to meet the installation requirements of multiple groups.

[0054] Furthermore, each group of the mounting plate groups includes a plate body 204, an elastic folding piece 205, a first rib 206 and a second rib 207, one end of the elastic folding piece 205 is fixedly connected to the plate body 204 and is located on one side of the plate body 204, the first rib 206 is fixedly connected to the elastic folding piece 205 and is located on one side of the elastic folding piece 205, and the second rib 207 is fixedly connected to the elastic folding piece 205 and is located on one side of the elastic folding piece 205.

[0055] In this embodiment, the plate body 204 is used to be installed to one side of the solid-state battery through the second bolt 201. The elastic folding piece 205 can enable the two groups of solid-state batteries to be adjusted in height and angle up and down. The first rib 206 and the second rib 207 improve the connection strength and connection reliability between the elastic folding piece 205 and the first rotating plate 202 or the second rotating plate 203.

[0056] The third embodiment of this application is: See also Figures 8 to 10 The present invention provides a dry solid-state battery: comprising a side package 1, a sealing plate, a liquid inlet pipe 2, a liquid drain pipe group and a connecting unit, wherein the number of the sealing plates is two groups, and the two groups of sealing plates are respectively arranged at the upper and lower ends of the side package 1, and the two groups of sealing plates cover the side package 1 to form a cavity, and the interior of the cavity is filled with electrolyte, positive electrode and negative electrode, the number of the liquid inlet pipe 2 is two groups, and each group of the liquid inlet pipe 2 is respectively connected to the corresponding sealing plate and is respectively located on one side of the corresponding sealing plate, the number of the liquid drain pipe group is two groups, and each group of the liquid drain pipe group is respectively connected to the corresponding sealing plate and is respectively Located on one side of the corresponding sealing plate, and the drainage pipe group is arranged opposite to the liquid inlet pipe 2, the number of the connecting units is two groups, each group of the connecting units is respectively arranged on one side of the side package bin 1, each group of the sealing plate includes a heat dissipation plate 3 and a cover plate 4, each group of the heat dissipation plate 3 has a main channel 5, the main channel 5 is a channel of different diameters, microchannels 6 are arranged on both sides of the main channel 5, and the microchannel 6 has multiple groups of connecting holes 7, multiple groups of the connecting holes 7 connect the microchannel 6 with the reflux chamber 8, the cover plate 4 is arranged above the heat dissipation plate 3, and the cover plate 4 covers the heat dissipation plate 3.

[0057] In this embodiment, the two groups of sealing plates and the side packaging chamber 1 constitute the cavity for placing the electrolyte, positive electrode, and negative electrode, and the battery cell is placed in the cavity. Each group of sealing plates is composed of the heat dissipation plate 3 and the cover plate 4. When multiple groups of solid-state batteries are arranged in an array during use, the sealing plates and the side packaging chamber 1 are first installed and fixed, and then the adjacent liquid inlet pipes 2 and the liquid discharge pipe group are connected using connecting pipes and connected to the liquid cooling circulation system. Finally, the two groups of solid-state battery arrays are connected through the connecting unit. When water cooling is in operation, the cooling medium enters the main channel 5 between the heat dissipation plate 3 and the cover plate 4 through the liquid inlet pipe 2. Since the diameter of the pipe at the input end is larger than the diameter of the pipe at the output end, the change in pipe diameter causes the pressure at the output end to increase, thereby controlling The flow rate is high, and the cooling medium flows into the microchannels 6 on both sides of the main channel 5, and flows into the reflux chamber 8 through the connecting holes 7 at the end of each group of tributaries of the microchannel 6. The drain pipe group discharges the cooling medium in the reflux chamber 8 and the main channel 5, and forms a reflux channel for the cooling medium through the reflux chamber 8. The microchannel 6 directly exchanges heat with the cover plate 4, and then cools the solid-state battery cell at the other end of the cover plate 4. The microchannel 6 adopts an imitation leaf vein structure, increases the heat dissipation area through a fractal structure, and utilizes the high heat transfer coefficient characteristics of jet impact to significantly improve the heat dissipation efficiency. The fractal network optimizes fluid distribution, combines jet impact and gradually convergent and divergent flow channel design to achieve the goals of efficient heat dissipation, excellent temperature uniformity and low energy consumption.

[0058] Furthermore, each group of the sealing plates further includes a guide plate 9 , and the guide plates 9 are in multiple groups. Each group of the guide plates 9 is fixedly connected to the heat dissipation plate 3 and is located inside the reflux chamber 8 .

[0059] In this embodiment, multiple groups of guide plates 9 are arranged in the reflux chamber 8 to guide the cooling medium that flows back into the reflux chamber 8 through the connecting hole 7, so as to avoid disrupting the flow direction of the medium in the reflux chamber 8, so that the reflux of the cooling medium is smoother and no turbulence or disturbance is formed.

[0060] Furthermore, the input end of each group of the liquid inlet pipes 2 is a circular tube structure, and the output end of each group of the liquid inlet pipes 2 is a wedge-shaped semicircular structure.

[0061] In this embodiment, the input end of the liquid inlet pipe 2 is changed from a circular pipe to a wedge-shaped semicircle, and the cooling medium inside is squeezed by the diameter change of the pipe body, thereby increasing the pressure and flow rate, thereby improving the heat dissipation rate.

[0062] Furthermore, each group of the drain pipe groups includes an upper drain cover 10, a lower drain cover 11 and a three-way pipe 12, the upper drain cover 10 is connected to one end of the three-way pipe 12, the lower drain cover 11 is connected to the other end of the three-way pipe 12, and the upper drain cover 10 and the lower drain cover 11 are respectively arranged on one side of the heat dissipation plate 3.

[0063] In this embodiment, the upper drain cover 10 is used to discharge the cooling medium flowing out of the main channel 5, and the lower drain cover 11 is used to discharge the cooling medium discharged from the reflux chamber 8. The cooling medium discharged by the upper drain cover 10 and the lower drain cover 11 are both discharged through the three-way pipe 12.

[0064] Furthermore, each set of the drain pipe group also includes a flange ring 13, which is fixedly connected to the tee pipe 12 and sleeved on the outer wall of the tee pipe 12, and the flange ring 13 is located at one end away from the upper drain cover 10 and the lower drain cover 11.

[0065] In this embodiment, the three-way pipe 12 can be connected to the liquid inlet pipe 2 of the next solid-state battery or to the cooling circulation system through the flange ring 13, thereby improving the connection stability and reliability of the drain pipe group.

[0066] Furthermore, each group of the connecting units includes a second positive L-plate 301, a second negative L-plate 302, a third bolt 303, a mother plate 304 and a male plate 305, and the number of the third bolts 303 is multiple groups. The second positive L-plate 301 and the second negative L-plate 302 are respectively detachably connected to the side package compartment 1 through the third bolts 303. The mother plate 304 is fixedly connected to the second positive L-plate 301 and is located at the upper end of the second positive L-plate 301. The male plate 305 is fixedly connected to the second negative L-plate 302 and is located at the lower end of the second negative L-plate 302, and the mother plate 304 and the male plate 305 are adapted to each other.

[0067] In this embodiment, when connecting multiple groups of solid-state batteries in an array, the head end of one group of solid-state batteries is connected to the end of another group of solid-state batteries. During the connection, the second positive L-plate 301 and the second reverse L-plate 302 are respectively installed and fixed by the third bolt 303. The second reverse L-plate 302 is covered on the second positive L-plate 301, and the male plate 305 is inserted into the female plate 304. The snap connection is completed by the adaptation between the female plate 304 and the male plate 305, thereby realizing the array snap connection between the two groups of solid-state batteries, which can effectively keep the solid-state batteries installed neatly, and can also effectively prevent the connecting pipe between the liquid inlet pipe 2 and the liquid discharge pipe group from being pulled off, thereby playing an effective limiting role.

[0068] The fourth embodiment of the present application is: See also Figure 11 The present invention provides a method for preparing a dry solid-state battery, comprising the following steps: S1: connecting and sealing the heat dissipation plate 3 and the cover plate 4 to form the sealing plate; S2: Fixing a set of the sealing plates to the lower end of the side packaging bin 1; S3: Selecting a positive electrode material to prepare a positive electrode material powder by mechanical mixing, and pressing the positive electrode material powder into a sheet to prepare a positive electrode sheet; S4: Selecting a negative electrode material to prepare a negative electrode material powder by mechanical mixing, and pressing the negative electrode material powder into a sheet to prepare a negative electrode sheet; S5: Selecting a solid electrolyte material to prepare a solid electrolyte powder by mechanical mixing, and pressing the solid electrolyte powder into a tablet to prepare a solid electrolyte sheet; S6: stacking the positive electrode sheet, the negative electrode sheet and the solid electrolyte sheet prepared above, and subjecting the stacked battery cells to hot pressing and melting treatment in a hot press; S7: placing the processed laminated battery cells between the side packaging compartment 1 and the sealing plate, and then covering and packaging them with another set of sealing plates; S8: charging and discharging the packaged solid-state battery in an inert atmosphere; S9: Apply static pressure to the packaged solid-state battery again to complete the preparation of the dry solid-state battery.

[0069] In the present method, a group of the sealing plates and the side packaging bin 1 are first used to form a loading bin, and then the corresponding positive electrode sheets, negative electrode sheets and solid electrolyte sheets are made from dry positive electrode powder, dry negative electrode powder and dry solid electrolyte powder respectively. The positive electrode sheets, negative electrode sheets and solid electrolyte sheets are stacked, and the formed laminated battery cells are subjected to hot pressing and melting treatment to melt and bond the solid electrolyte and the electrode interface, reduce the pores, and improve the density of the dry solid-state battery. The processed laminated battery cells are placed in the loading bin and sealed by another group of the sealing plates. The packaged battery is charged and discharged in an inert atmosphere to form a stable SEI film. After packaging, isostatic pressing is applied again to repair the problem of micro-detachment of the interface in the early stage of the cycle.

[0070] The above disclosure is only a preferred embodiment of the present invention, and certainly cannot be used to limit the scope of the rights of the present invention. Ordinary technicians in this field can understand that all or part of the processes of the above embodiment and equivalent changes made in accordance with the claims of the present invention are still within the scope of the invention.

Claims

1. A dry solid-state battery, characterized in that: It includes a side package bin, a sealing plate, a liquid inlet pipe, a liquid discharge pipe group and a connecting unit. The number of the sealing plates is two groups, and the two groups of sealing plates are respectively arranged at the upper and lower ends of the side package bin, and the two groups of sealing plates cover the side package bin to form a cavity. The interior of the cavity is filled with electrolyte, positive electrode and negative electrode. The number of the liquid inlet pipes is two groups, and each group of the liquid inlet pipes is respectively connected to the corresponding sealing plate and is respectively located on one side of the corresponding sealing plate. The number of the liquid discharge pipe groups is two groups, and each group of the liquid discharge pipe groups is respectively connected to the corresponding sealing plate and is respectively located Corresponding to one side of the sealing plate, and the drain pipe group is arranged opposite to the liquid inlet pipe, the number of the connecting units is two groups, each group of the connecting units is respectively arranged on one side of the side package bin, each group of the sealing plate includes a heat dissipation plate and a cover plate, each group of the heat dissipation plate has a main channel, the main channel is a different diameter channel, microchannels are arranged on both sides of the main channel, and the microchannel has multiple groups of connecting holes, multiple groups of the connecting holes connect the microchannel and the reflux chamber, the cover plate is arranged above the heat dissipation plate, and the cover plate covers the heat dissipation plate.

2. A dry solid-state battery according to claim 1, characterized in that: Each group of sealing plates further includes a guide plate, and the number of the guide plates is multiple. The guide plates in each group are respectively fixedly connected to the heat dissipation plate and are respectively located inside the reflux cavity.

3. A dry solid-state battery according to claim 1, characterized in that: The input end of each group of liquid inlet pipes is a circular tube structure, and the output end of each group of liquid inlet pipes is a wedge-shaped semicircular structure.

4. A dry solid-state battery according to claim 1, characterized in that: Each group of the drain pipe groups includes an upper drain cover, a lower drain cover and a tee pipe, the upper drain cover is connected to one end of the tee pipe, the lower drain cover is connected to the other end of the tee pipe, and the upper drain cover and the lower drain cover are respectively arranged on one side of the heat dissipation plate.

5. A dry solid-state battery according to claim 4, characterized in that: Each set of the drain pipes further includes a flange ring, which is fixedly connected to the tee and sleeved on the outer wall of the tee, and is located at one end away from the upper drain cover and the lower drain cover.

6. A dry solid-state battery according to claim 1, characterized in that: Each group of the connecting units includes a first positive L-plate, a first negative L-plate, a clamping column and a first bolt. The first positive L-plate and the first negative L-plate are respectively disassembled and fixed to the two sides of the side package bin by the first bolts. The first negative L-plate has a clamping hole. There are two groups of clamping columns. The two groups of clamping columns are respectively fixedly connected to the first positive L-plate and are respectively located at the upper end of the first positive L-plate, and the clamping columns and the clamping holes are adapted to each other.

7. The dry solid-state battery according to claim 1, characterized in that: Each group of the connecting units includes a mounting plate group, a second bolt, a first rotating plate and a second rotating plate, the first rotating plate is rotatably connected to the second rotating plate, and one end of the first rotating plate is embedded in the interior of the second rotating plate. There are two groups of the mounting plate groups, and the two groups of the mounting plate groups are respectively fixedly connected to the corresponding first rotating plate and the second rotating plate, and are respectively located on one side of the corresponding first rotating plate and the second rotating plate. There are multiple groups of the second bolts, and each group of the second bolts passes through the corresponding mounting plate group and is respectively adapted to the side bag compartment.

8. A dry solid-state battery according to claim 7, characterized in that: Each group of the mounting plate groups includes a plate body, an elastic folding piece, a first rib and a second rib, one end of the elastic folding piece is fixedly connected to the plate body and is located on one side of the plate body, the first rib is fixedly connected to the elastic folding piece and is located on one side of the elastic folding piece, and the second rib is fixedly connected to the elastic folding piece and is located on one side of the elastic folding piece.

9. The dry solid-state battery according to claim 1, characterized in that: Each group of the connecting units includes a second positive L-plate, a second negative L-plate, a third bolt, a mother plate and a male plate. The number of the third bolts is multiple groups. The second positive L-plate and the second negative L-plate are respectively detachably connected to the side package bin through the third bolts. The mother plate is fixedly connected to the second positive L-plate and is located at the upper end of the second positive L-plate. The male plate is fixedly connected to the second negative L-plate and is located at the lower end of the second negative L-plate, and the mother plate and the male plate are adapted to each other.

10. A method for preparing a dry solid-state battery, for preparing a dry solid-state battery according to claim 1, characterized in that: The steps include: Connecting and sealing the heat dissipation plate and the cover plate to form the sealing plate; Fixing a set of the sealing plates to the lower end of the side packaging bin; Selecting positive electrode materials to prepare positive electrode material powder by mechanical mixing, and pressing the positive electrode material powder into sheets to prepare positive electrode sheets; Selecting negative electrode materials to prepare negative electrode material powder by mechanical mixing, and pressing the negative electrode material powder into sheets to prepare negative electrode sheets; Selecting a solid electrolyte material to prepare a solid electrolyte powder by mechanical mixing, and pressing the solid electrolyte powder into a tablet to prepare a solid electrolyte sheet; The positive electrode sheet, the negative electrode sheet and the solid electrolyte sheet prepared above are stacked, and the stacked laminated battery core is subjected to hot pressing and melting treatment in a hot press; Placing the processed laminated battery cells between the side packaging compartments and the sealing plates, and then covering and packaging them with another set of sealing plates; The packaged solid-state battery is charged and discharged in an inert atmosphere; Static pressure is applied to the packaged solid-state battery again to complete the preparation of the dry solid-state battery.

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