High mass specific energy power primary battery and electric equipment

Abstract

The invention discloses a high mass specific energy power primary battery and electric equipment, and relates to the technical field of batteries. Comprising a cover group, a shell, a positive pole piece, a diaphragm, a negative pole piece, a thermistor, an electrolyte, a bottom cover plate and a hole plugging piece, the shell is of a hollow cylindrical structure with two open ends and is covered by the cover set and the bottom cover plate to form a containing cavity. A collector plate and a pole are made of a high-conductivity metal material, and the pole and a cover group body are hermetically connected through a glass body; the negative pole piece is provided with a supporting structure, each of the positive pole piece and the negative pole piece is provided with at least one pole lug, the positive pole piece or the negative pole piece is coated with a diaphragm of a coating layer and placed in the accommodating cavity, the negative pole lug is connected with a bottom cover plate, the positive pole lug is connected with one end of a thermistor, the other end of the thermistor is connected with a collector plate, and electrolyte is injected to prepare the battery. The problems of continuous current output of more than 5C, use in an environment of-55 DEG C to 125 DEG C, overload impact of gravitational acceleration of more than 10 times, impact of environment temperature, storage for more than 10 years and the like of a primary battery are solved.

Description

Technical Field

[0001] The present invention belongs to the technical field of primary cells (primary batteries), and relates to the design and manufacture of high-quality specific energy power primary cells, as well as the use of primary cells and electrical equipment in the fields of high rate, high safety, extreme environment, harsh use conditions, and long storage period. Background Art

[0002] In the current electrochemical system, lithium / manganese dioxide, lithium / carbon fluoride and lithium / metal oxide primary batteries (primary batteries) have higher mass specific energy than energy storage batteries (secondary batteries) and lower self-discharge rates. This is especially true for portable and non-charging batteries, extreme environments (-40°C low temperature, 100°C high temperature), unmanned equipment or devices with weight restrictions and large current requirements, and long storage periods. It is of great significance for primary batteries to achieve high mass specific energy and specific power.

[0003] High-quality specific energy and specific power primary batteries are limited not only by the characteristics of the positive electrode active material and the positive electrode preparation technology, but also by the battery structure components and assembly process, which are the key factors restricting the high specific energy and specific power output of the primary batteries. It is necessary to make a systematic breakthrough in the battery structure components and assembly process to develop a high-quality specific energy and specific power primary battery to meet the demand for primary batteries (primary batteries) in extreme environments and special conditions. Summary of the invention

[0004] The purpose of the present invention is to systematically solve the problems of continuous high-rate current output of more than 5C, wide temperature (-55℃~125℃) environment use, overload shock of more than 10 times gravity acceleration, environmental temperature shock, long-term storage of more than 10 years, etc. of metal lithium primary batteries by adopting high specific energy and specific power positive electrode active materials to prepare positive electrode sheets, electrode sheet full-electrode ear (including multi-electrode ear) structure, diaphragm-coated electrode sheets, high-conductivity poles, glass-sealed insulation and other technical measures, so as to meet the use requirements of original batteries (primary batteries) in the fields of high rate, high safety, extreme environment, harsh use conditions and long storage period.

[0005] The present invention also relates to the structural composition and use of a power primary battery, and adopts the following technical solutions to achieve the purpose of the invention.

[0006] The present invention provides a high-quality specific energy power primary battery, comprising: a hole plugging member, a bottom cover plate, a shell, a battery core pack, an electrolyte, a thermistor assembly, an insulating sheet and a cover group;

[0007] The bottom cover plate has a circular or cross-shaped explosion-proof scoring line carved on one plane thereof. Preferably, the depth of the explosion-proof scoring line is 1 / 3 to 1 / 2 of the thickness of the bottom cover plate.

[0008] Furthermore, the bottom cover plate is provided with a liquid injection hole, and a hole blocking member is arranged in the liquid injection hole, and the hole blocking member is pressed into or welded to seal the liquid injection hole.

[0009] The shell is a hollow cylindrical structure with a first opening and a second opening at both ends respectively. The cover group covers the first opening, and the bottom cover plate covers the second opening. The cover group, the shell, the bottom cover plate and the hole-blocking member are welded together to form a closed accommodating cavity that is completely isolated from the outside world. The insulating sheet, the thermistor assembly, the battery core pack, and the electrolyte are located in the accommodating cavity, thereby improving the storage life of the battery, as well as the safety and environmental adaptability of the battery.

[0010] The battery core pack includes a positive electrode sheet, a separator, and a negative electrode sheet. The positive electrode sheet and the negative electrode sheet are mutually wrapped or alternately stacked, and a separator is provided between the positive electrode sheet and the negative electrode sheet to isolate the positive electrode sheet from the negative electrode sheet. Optionally, the positive electrode sheet and the negative electrode sheet are at least one sheet each.

[0011] Furthermore, the positive electrode plate adopts high-quality specific energy active material, which is mixed according to the ratio of active material: conductive agent: aqueous binder of 85% to 94.8%: 4% to 10%: 1.2% to 5%, and is coated on the positive electrode collector and cut into strips or die-cut into one of the following shapes: strips, circles, quadrilaterals, polygons, and special shapes.

[0012] Furthermore, the high mass specific energy active material includes, but is not limited to, at least one of manganese dioxide, carbon fluoride, carbon fluoride modified composite material, and metal oxide. Preferably, at least one of carbon fluoride modified composite material and metal oxide.

[0013] Furthermore, the binder is at least one of sodium polyacrylate, sodium carboxymethyl cellulose, rubber latex, acrylic acid homopolymer, polyvinyl alcohol, acrylonitrile multipolymer, and conductive polymer binder.

[0014] Furthermore, the positive electrode current collector is one of aluminum foil, 304 stainless steel foil, and 316 stainless steel foil. Preferably, the current collector is one of 304 stainless steel foil and 316 stainless steel foil in the slurry containing manganese ion active material.

[0015] Furthermore, the positive electrode sheet is formed by die-cutting (or striping) and is one of strip, circle, quadrilateral, polygon, and irregular shape. Preferably, the positive electrode sheet of the wound battery pack is strip-shaped, and the positive electrode sheet of the laminated battery pack is one of round, quadrilateral, polygon, and irregular shape.

[0016] Furthermore, the separator is any one of a separator with a coating layer on one side or two sides, and a PEP separator. Preferably, the separator is a separator with a coating layer on one side or two sides.

[0017] Furthermore, the separator has a single-sided or double-sided coating layer, and the coating layer includes at least one of boehmite, polymer, and gel electrolyte.

[0018] Furthermore, the diaphragm is heat-pressed and melted to coat the positive electrode sheet or the negative electrode sheet, thereby effectively avoiding the occurrence of micro-short circuit problems inside the battery, which would lead to a decrease in the electrical performance of the battery.

[0019] Furthermore, the hot pressing edge melting coating is to fold the diaphragm in half to cover the positive electrode sheet or the negative electrode sheet with the non-ear side edge of the positive electrode sheet or the negative electrode sheet as the folding line, and extend 0.5mm to 3mm beyond the edge of the sheet, and then heat and pressurize the part extending beyond the edge of the sheet to fuse and adhere, so that the positive electrode sheet or the negative electrode sheet is coated therein.

[0020] Furthermore, the negative electrode plate adopts one of metal lithium and lithium copper composite. Preferably, the lithium copper composite is adopted; the lithium copper composite is formed by rolling or electroplating a layer of metal lithium on the surface of copper foil to make a lithium copper composite sheet with a supporting structure, thereby improving the structural strength of the plate, as well as the current collection and large current load capacity. The copper foil includes microporous copper foil.

[0021] Furthermore, the negative electrode sheet is coated with a release film and then striped or die-cut into one of strip, round, quadrilateral, polygonal, and irregular shapes. Preferably, the negative electrode sheet of the wound battery pack is strip-shaped, and the negative electrode sheet of the laminated battery pack is one of round, quadrilateral, polygonal, and irregular shapes.

[0022] Furthermore, each of the positive electrode sheets is formed with at least one positive electrode tab, and each of the negative electrode sheets is formed with at least one negative electrode tab, and the tabs of the positive electrode sheets and the negative electrode sheets of the battery are both one of multi-tabs and full tabs, and the positive electrode tabs and the negative electrode tabs are first welded into one, and then the negative electrode tabs are connected to the bottom cover plate, and the positive electrode tabs are connected to the thermistor assembly, and the thermistor assembly is connected to the pole.

[0023] Furthermore, the electrolyte is selected from one of solid electrolyte, gel electrolyte or wide temperature electrolyte; when solid or gel electrolyte is used as the ion exchange medium, there is no injection process in the manufacturing process.

[0024] Furthermore, the wide temperature range electrolyte has an ion conductivity greater than or equal to 1.3×10 -5 s / cm, and the operating temperature range is -55℃~125℃, and it contains additives for suppressing gas generation in the corresponding electrochemical system battery for secondary injection.

[0025] Furthermore, the battery electrolyte injection of the present invention adopts a staged secondary injection process, that is, the first electrolyte injection battery is sealed with a pre-sealing component, placed in an anhydrous and oxygen-free environment for a period of time, the pre-sealing component is removed, and the second electrolyte injection is performed, and the plugging component is pressed into the hole, or the injection hole is sealed by welding. Preferably, the pre-sealing component is made of silica gel; the battery is placed in an anhydrous and oxygen-free environment for a period of time, which is more than 1 hour.

[0026] The thermistor component is a polymer PTC thermistor, which has a unique positive temperature coefficient resistance characteristic, and avoids external short circuit of the battery, which would cause safety problems in use.

[0027] The insulating sheet is located between the current collecting plate and the cover group body, and two opposite surfaces of the insulating sheet are respectively in contact with one side of the cover group body and the inner wall of the shell, so that the current collecting plate and the pole are insulated from the inner wall of the shell.

[0028] The cap assembly includes a cap assembly body, an insulator, a pole and a current collector, and is a circular, rectangular, square, polygonal or special-shaped assembly, at least part of the pole is located in the battery cavity, the cap assembly body is provided with a through hole, the pole is passed through the through hole, part of the pole is located outside the battery, the pole is insulated and connected to the hole wall of the through hole by the insulator, and the pole is insulated from the inner wall of the battery cavity. Preferably, the circumference of the battery extreme envelope is greater than 32 mm.

[0029] Furthermore, a through hole is provided on the cover assembly body, the pole is passed through the through hole, the lower end surface of the pole is located in the battery cavity, and the upper end surface of the pole is located outside the battery.

[0030] Furthermore, the insulator is a glass body that has weather resistance, resistance to hydrofluoric acid corrosion and electrochemical corrosion, and insulation properties, and balances the thermal stress and structural stress caused by different thermal expansion and contraction coefficients of different materials in the pole, the insulator, and the cover group body. The glass body is melted and injected into the matching gap between the pole and the cover group body, and cooled and solidified to bond the pole and the cover group body, so that the pole is insulated and sealed with the hole wall of the through hole, thereby improving the sealing reliability of the battery, thereby improving the storage life, environmental adaptability, and reliability of use of the battery.

[0031] Furthermore, the pole includes an upper end face and a lower end face, with a diameter of 4mm to 10mm. The upper end face of the pole is processed with an external threaded column or an internal countersunk thread, which is used to connect the electrical connecting plate through a nut or a screw, thereby improving the convenience of battery series and parallel connection and the overcurrent efficiency of the battery pack.

[0032] Furthermore, the current collecting plate has a first surface and a second surface opposite to each other, the first surface is connected to the pole, the second surface is connected to the thermistor assembly, and the pole plate is located in the accommodating cavity.

[0033] Furthermore, the pole and the current collecting plate are made of the same material, which is one of Kovar alloy, aluminum alloy, copper and silver alloy, and the axial cross section is one of rectangular, T-shaped and I-shaped. Preferably, one of copper and silver alloy is used to reduce the resistance, loss and volume of the pole of the battery power output, and improve the battery discharge rate and overcurrent performance.

[0034] One end of the thermistor assembly is connected to the lower end surface of the pole to avoid safety problems caused by overcurrent, overheating or short circuit of the battery.

[0035] Furthermore, the cover assembly body, shell and bottom cover plate are made of the same material, which is any one of stainless steel, aluminum alloy and titanium alloy. Preferably, the wall thickness of stainless steel and titanium alloy is 0.1mm-1.0mm, and the wall thickness of aluminum alloy is 0.5mm-3.0mm.

[0036] In a second aspect, the present invention provides an electrical device, wherein the electrical device comprises a high-quality energy-density power primary battery as described in any one of the first aspects above.

[0037] In the present invention, since the positive electrode plate adopts high-quality specific energy active material, the weight of the battery with the same capacity is reduced, and the battery weight requirement is met. Since the pole and the cover group body are sealed by the insulator glass body condensation, the cover group is welded to the first opening of the shell, the bottom cover plate is welded to the second opening of the shell, and the hole plugging member is pressed into or welded to seal the injection hole, the cover group, the shell, the bottom cover plate and the hole plugging member can enclose and form a sealed accommodating cavity completely isolated from the external environment, so that the positive electrode plate, the diaphragm, the negative electrode plate, the electrolyte, the thermistor assembly and the insulating sheet are placed in the accommodating cavity to avoid leakage of the electrolyte or intrusion of foreign substances, which may cause a sudden drop in the battery electrical performance and improve the battery storage life, environmental adaptability and safety. Since the positive electrode sheet and the negative electrode sheet are mutually wrapped or alternately superimposed, a diaphragm is arranged between the positive electrode sheet and the negative electrode sheet, and the diaphragm is heat-melted to cover the positive electrode sheet or the negative electrode sheet, so the diaphragm can isolate the positive electrode sheet and the negative electrode sheet, and prevent the positive electrode sheet and the negative electrode sheet from being connected, resulting in the problem of internal short circuit or micro short circuit of the power primary battery. Since each positive electrode sheet is formed with at least one pole ear, each negative electrode sheet is formed with at least one negative pole ear, the negative electrode sheet has a lithium-copper composite sheet of a supporting structure, the pole column and the current collector are one of the high-conductivity metals of copper and silver alloy, and the upper end surface of the pole column is processed with an external threaded columnar body or an internal countersunk hole thread, so while improving the internal charge collection and overcurrent efficiency of the battery, the resistance and loss of the battery power output are reduced, thereby improving the battery discharge rate and overcurrent efficiency. Since the negative pole ear is welded to one side of the bottom cover plate, the positive pole ear is welded to the thermistor assembly, and the thermistor assembly is welded to the current collector, the thermistor assembly can be used for overheat protection inside the power battery, thereby improving the safety of the power battery. Since the electrolyte is selected from solid electrolyte, gel electrolyte or wide temperature electrolyte, and contains additives for suppressing gas generation in the corresponding electrochemical system battery, the safety of battery storage and use, as well as adaptability to extreme environmental conditions, are improved. That is, in the present invention, by using high-quality specific energy active materials, the negative electrode sheet has a support structure, each positive electrode sheet and each negative electrode sheet are formed with at least one negative electrode ear, the diaphragm is hot-melt coated with the positive electrode sheet or the negative electrode sheet, the pole and the current collector are made of high-conductivity metal, the pole and the cover group body are connected by sintering and sealing the insulator, and one of the solid electrolyte, gel electrolyte or wide-temperature electrolyte is selected, the upper end surface of the pole is processed with an external threaded columnar body or an internal countersunk hole thread, a thermistor assembly is arranged inside the battery, and the positive electrode ear is connected to the current collector through the thermistor assembly, and in addition, the cover group, the shell, the bottom cover plate and the hole plugging member are enclosed to form a sealed accommodation cavity, thereby improving the discharge rate, discharge efficiency, storage life, environmental adaptability and reliability of the battery. That is, in the present invention, the power primary battery can meet multiple requirements such as wide temperature, light weight, high rate, and reliable output of electric energy. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] The drawings described herein are used to provide a further understanding of the present invention and constitute a part of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the drawings:

[0039] Figure 1 It is a schematic diagram of the battery structure of the present invention.

[0040] Figure 2 It is a schematic diagram of the structure of the battery cover assembly of the present invention.

[0041] Figure 3 This is a schematic diagram of the hot-pressing coating of the diaphragm on the pole piece of the present invention.

[0042] Figure 4 It is a schematic diagram of the battery bottom cover structure of the present invention.

[0043] Figure 5 This is a 10C discharge curve diagram of a high-quality energy-density power primary battery with a nominal capacity of 5Ah according to the present invention.

[0044] Reference numerals: 100-bottom cover plate, 101-explosion-proof notch line, 102-liquid injection hole, 200-hole plugging member, 300-housing, 400-

[0045] Diaphragm, 500-negative electrode sheet, 501-negative electrode tab, 600-positive electrode sheet, 601-positive electrode tab, 700-

[0046] Cover assembly, 701-cover assembly body, 702-insulator, 703-pole, 704-collector plate, 800-thermistor assembly, 900-upper insulating sheet. DETAILED DESCRIPTION

[0047] In order to facilitate the clear description of the technical solutions of the embodiments of the present invention, in the embodiments of the present invention, the words "first" and "second" are used to distinguish the same items or similar items with basically the same functions and effects. For example, the first threshold and the second threshold are used to distinguish different thresholds, and their order is not limited. Those skilled in the art can understand that the words "first" and "second" do not limit the quantity and execution order, and the words "first" and "second" do not necessarily limit them to be different.

[0048] It should be noted that, in the present invention, words such as "exemplary" or "for example" are used to indicate examples, illustrations or descriptions. Any embodiment or design described as "exemplary" or "for example" in the present invention should not be interpreted as being more preferred or more advantageous than other embodiments or designs. Specifically, the use of words such as "exemplary" or "for example" is intended to present related concepts in a specific way.

[0049] In the present invention, "at least one" means one or more, and "plurality" means two or more. "And / or" describes the association relationship of associated objects, indicating that three relationships may exist. For example, A and / or B can mean: A exists alone, A and B exist at the same time, and B exists alone, where A and B can be singular or plural. The character " / " generally indicates that the associated objects before and after are in an "or" relationship. "At least one of the following" or similar expressions refers to any combination of these items, including any combination of single or plural items. For example, at least one of a, b or c can mean: a, b, c, the combination of a and b, the combination of a and c, the combination of b and c, or the combination of a, b and c, where a, b, c can be single or multiple.

[0050] The embodiment of the present invention provides a power primary battery, such as Figures 1 to 4 As shown, the power primary battery includes: a bottom cover plate 100, a hole plugging member 200, a shell 300, a negative electrode plate 500, a diaphragm 400, a positive electrode plate 600, a thermistor assembly 800, an electrolyte, an insulating sheet 900 and a cover assembly 700.

[0051] The housing 300 is a hollow cylindrical structure, with a first opening and a second opening at both ends respectively. The cover assembly covers the first opening, and the bottom cover plate covers the second opening. The cover assembly, the housing, the bottom cover plate and the hole blocking member are welded together to form a receiving cavity.

[0052] A plurality of positive electrode sheets 600, a plurality of negative electrode sheets 500, a diaphragm 400, a thermistor assembly 800, an electrolyte, and an insulating sheet 900 are all located in the accommodating cavity, and the positive electrode sheets 600 and the negative electrode sheets 500 are mutually wrapped or alternately stacked, and a diaphragm 400 is arranged between the positive electrode sheets 600 and the negative electrode sheets 500 to isolate the positive electrode sheets 600 from the negative electrode sheets 500; the cover assembly 700 includes a cover assembly body 701, an insulator 702, a pole 703 and a current collecting plate 704, the cover assembly body 701 covers the first opening, and at least part of the pole 703 is located in the accommodating cavity. In the cavity, a through hole is provided on the cover group body 701, and the pole 703 is passed through the through hole. Part of the pole 703 is located outside the accommodating cavity, and the pole 703 is insulated from the hole wall of the through hole, and the pole 703 is insulated from the inner wall of the shell 300; each positive electrode sheet 600 is formed with at least one positive electrode ear 601, and each negative electrode sheet 500 is formed with at least one negative electrode ear 501, the negative electrode ear 501 is connected to the bottom cover plate 100, the positive electrode ear 601 is connected to the thermistor assembly 800, and the thermistor assembly 800 is connected to the pole 703.

[0053] In the embodiment of the present invention, since the positive electrode plate 600 adopts high-quality specific energy active material, the weight of the battery with the same capacity is reduced, and the battery weight requirement is met. Since the pole 703 and the cover assembly body 701 are sealed by the glass condensation of the insulator 702, the cover assembly 700 is welded to the first opening of the shell 300, the bottom cover plate 100 is welded to the second opening of the shell 300, and the hole plugging member 200 is pressed into or welded to seal the injection hole, the cover assembly 700, the shell 300, the bottom cover plate 100 and the hole plugging member 200 can enclose and form a sealed accommodating cavity completely isolated from the external environment, so that the positive electrode plate 600, the diaphragm 400, the negative electrode plate 500, the electrolyte, the thermistor assembly 800 and the insulating sheet are placed in the accommodating cavity to avoid leakage of the electrolyte or intrusion of foreign substances, resulting in a sudden drop in the battery electrical performance, and improve the battery storage life, environmental adaptability and safety. Since the positive electrode sheet 600 and the negative electrode sheet 500 are wrapped around each other or alternately stacked, a diaphragm 400 is arranged between the positive electrode sheet 600 and the negative electrode sheet 500, and the diaphragm 400 is hot-melt coated on the positive electrode sheet 600 or the negative electrode sheet 500. Therefore, the diaphragm 400 can isolate the positive electrode sheet 600 and the negative electrode sheet 500, thereby preventing the positive electrode sheet 600 and the negative electrode sheet 500 from being conductive, resulting in internal short circuit or micro short circuit problems in the power primary battery. Since each positive electrode plate 600 is formed with at least one positive electrode tab 601, each negative electrode plate 500 is formed with at least one negative electrode tab 501, the negative electrode plate 500 has a lithium copper composite sheet of a supporting structure, the pole 703 and the current collector 704 are both one of copper and silver alloy high conductivity metals, and the upper end surface of the pole 703 is processed with an external threaded columnar body or an internal countersunk thread, so while improving the internal charge collection and overcurrent efficiency of the battery, the resistance and loss of the battery power output are reduced, thereby improving the battery discharge rate and overcurrent efficiency. Since the negative pole tab 501 is welded to one side of the bottom cover plate 100, the positive pole tab 601 is welded to the thermistor assembly 800, and the thermistor assembly 800 is welded to the current collector 704, the thermistor assembly 800 can be overheated inside the power primary battery, so that the safety of the power primary battery is improved. Since the electrolyte is selected from one of solid electrolyte, gel electrolyte or wide temperature electrolyte, and contains additives for suppressing gas generation in the corresponding electrochemical system battery, the safety of battery storage and use, as well as adaptability to extreme environmental conditions are improved.That is, in the present invention, by using high-quality specific energy active materials, the negative electrode sheet 500 has a support structure, each positive electrode sheet 600 and each negative electrode sheet 500 are formed with at least one pole ear, the diaphragm 400 is hot-melt-coated with the positive electrode sheet 600 or the negative electrode sheet 500, the pole 703 and the current collecting plate 704 are made of high-conductivity metal, the pole 703 and the cover assembly body 701 are sintered and sealed by the insulator 702, and the solid electrolyte, gel electrolyte, etc. are selected. The upper end surface of the pole 703 is processed with an external threaded column or an internal countersunk thread, a thermistor assembly 800 is arranged inside the battery, and the positive pole ear 601 is connected to the current collecting plate 704 through the thermistor assembly 800. In addition, the cover assembly 700, the shell 300, the bottom cover plate 100 and the hole plugging member 200 are enclosed to form a sealed accommodating cavity, thereby improving the discharge rate, discharge efficiency, storage life, environmental adaptability and reliability of the battery. That is, in the present invention, the power primary battery can meet multiple requirements such as wide temperature, light weight, high rate, and reliable output of electric energy.

[0054] It should be noted that, in the embodiment of the present invention, each positive electrode sheet 600 can be connected to a positive electrode ear 601, and of course, each positive electrode sheet 600 can also be connected to multiple positive electrode ears 601. In this regard, the embodiment of the present invention is not limited here. Of course, in the embodiment of the present invention, the positive electrode sheet 600 itself can also be used as the positive electrode ear 601. In addition, each negative electrode sheet 500 can be connected to a negative electrode ear 501, and of course, each negative electrode sheet 500 can also be connected to multiple negative electrode ears 501. In this regard, the embodiment of the present invention is not limited here. Of course, in the embodiment of the present invention, the negative electrode sheet 500 itself can also be used as the negative electrode ear 501. Among them, when each positive electrode plate 600 is connected to multiple positive electrode tabs 601, and each negative electrode plate 500 is connected to multiple negative electrode tabs 501, at this time, it is equivalent to setting up the power original battery in a multi-pole tab manner; when the positive electrode plate 600 itself serves as the positive electrode tab 601, and the negative electrode plate 500 itself serves as the negative electrode tab 501, at this time, it is equivalent to setting up the power original battery in a full-pole tab manner.

[0055] In addition, in the embodiment of the invention, the material of the shell 300, the cover group body 701, the bottom cover plate 100 and the hole plugging member 200 can be the same metal material, which can include but is not limited to stainless steel, aluminum alloy, titanium alloy, etc. In addition, when the material of the shell 300 is stainless steel or titanium alloy, the thickness of the shell 300 can be any value from 0.1mm to 1.0mm, for example, the thickness of the shell 300 is 0.1mm, for example, the thickness of the shell 300 is 0.5mm, for example, the thickness of the shell 300 is 1mm; when the material of the shell 300 is aluminum alloy, the thickness of the shell 300 can be any value from 0.5mm to 3.0mm, for example, the thickness of the shell 300 is 0.5mm, for example, the thickness of the shell 300 is 1mm, for example, the thickness of the shell 300 is 3mm, for example, the thickness of the shell 300 is 3mm.

[0056] In addition, in the embodiment of the present invention, the cover assembly body 701, the shell 300 and the bottom cover plate 100 can cooperate with each other according to the tolerance and be sealed by welding to form a fully sealed battery cavity.

[0057] In addition, in an embodiment of the present invention, a diaphragm 400 may be provided between the positive electrode sheet 600 and the shell 300, or the diaphragm 400 may be used to cover the positive electrode sheet 600 or the negative electrode sheet 500 and extend beyond the edge of the sheet by 0.5 mm to 3 mm, and hot-pressed and melted to cover the positive electrode sheet 600 or the negative electrode sheet 500 to form a negative electrode sheet 500 or a positive electrode sheet 600 covered with the diaphragm 400.

[0058] In addition, in some embodiments, the pole 703 may include a current collecting plate 704 and a pole 703; the current collecting plate 704 has a first surface and a second surface relative to each other, the pole 703 is fixed to the first surface, the thermistor assembly 800 is connected to the second surface, the current collecting plate 704 is located in the accommodating cavity, the pole 703 is passed through the through hole, and part of the pole 703 is located outside the shell 300; the pole 703 is insulated and connected to the hole wall of the through hole, and the current collecting plate 704 is insulated from the inner wall of the shell 300.

[0059] Since the pole 703 is fixed to the first surface of the current collecting plate 704, the current collecting plate 704 is located in the accommodating cavity, the pole 703 is penetrated in the through hole, and part of the pole 703 is located outside the shell 300, therefore, the part to be connected can be connected through the part of the pole 703 located outside the shell 300, so that the electric energy of the power primary battery is transferred to the part to be connected. Since the thermistor assembly 800 is electrically connected to the second surface, during the operation of the power primary battery, the thermistor assembly 800 can protect the current collecting plate 704 from overheating, and avoid more heat being transferred to the current collecting plate 704, thereby improving the safety of the power primary battery. In addition, the pole 703 is insulated from the hole wall of the through hole, and the current collecting plate 704 is insulated from the inner wall of the shell 300, which can ensure that the positive pole piece 600 and the negative pole piece 500 are insulated from each other, and avoid the conduction between the positive pole piece 600 and the negative pole piece 500, which leads to the problem of short circuit inside the power primary battery.

[0060] In addition, in some embodiments, a threaded countersunk hole is provided on a portion of the pole 703 located outside the housing 300 , and the threaded countersunk hole is used to connect with a component to be connected.

[0061] By providing a threaded countersunk hole on the pole 703, when the power battery needs to be connected to the component to be connected, the component to be connected can be directly connected to the threaded countersunk hole, so that the component to be connected is connected to the pole 703. That is, by providing a threaded countersunk hole on the pole 703, it is convenient to connect the power battery to the component to be connected.

[0062] It should be noted that, in the embodiment of the present invention, the components to be connected may be other power primary batteries, which is equivalent to connecting the current power primary batteries with other power primary batteries through bolts and electrical connecting sheets, so that the power primary batteries are connected in series and in parallel.

[0063] In addition, in some embodiments, a liquid injection hole 102 is provided on the bottom cover plate 100 , a hole plugging member 200 is provided in the liquid injection hole 102 , and the hole plugging member 200 seals the liquid injection hole 102 ; wherein, the surface of the bottom cover plate 100 facing away from the cover assembly 700 is provided with explosion-proof scratches 101 .

[0064] Since the bottom cover plate 100 is provided with a liquid injection hole 102, the electrolyte can be injected into the accommodating cavity through the liquid injection hole 102, so that the positive electrode plate 600, the negative electrode plate 500 and the electrolyte react in the accommodating cavity to form electric energy. Since the liquid injection hole 102 is provided with a hole plugging member 200, the liquid injection hole 102 can be blocked by the hole plugging member 200 after the electrolyte is injected to prevent the electrolyte from leaking from the liquid injection hole 102. In addition, the surface of the bottom cover plate 100 away from the cover assembly 700 is provided with an explosion-proof scratch 101, so that once the temperature or air pressure inside the shell 300 is too high, causing the power primary battery to explode, the bottom cover plate 100 is first damaged at the explosion-proof scratch 101, so that the air pressure inside the shell 300 is released, preventing the shell 300 from bursting, and thereby improving the safety performance of the power primary battery.

[0065] It should be noted that the shape of the explosion-proof scratch 101 can be set according to actual needs. For example, the shape of the explosion-proof scratch 101 is a cross. For another example, the shape of the explosion-proof scratch 101 is a circle. The specific shape of the explosion-proof scratch 101 is not limited in this embodiment of the present invention.

[0066] In addition, in an embodiment of the present invention, the injection hole 102 and the explosion-proof scratch 101 can be located in the middle of the bottom cover 100, so that when the electrolyte is injected through the injection hole 102, the electrolyte can be more evenly distributed in the shell 300, and when the air pressure inside the power battery is too high, the middle part of the bottom cover 100 is subjected to greater force, and the explosion-proof scratch 101 is located in the middle part of the bottom cover 100, which can facilitate the bottom cover 100 to be damaged at the explosion-proof scratch 101, thereby relieving pressure.

[0067] In addition, in the embodiment of the present invention, the cover assembly 700, the housing 300 and the bottom cover plate 100 can all be made of metal. The cover assembly 700 can be connected to an opening of the housing 300 by welding, and the bottom cover plate 100 can also be connected to another opening of the housing 300 by welding. Of course, the cover assembly 700 can also be connected to an opening of the housing 300 by snapping.

[0068] In addition, in some embodiments, the cover group 700 may further include an insulator 702; the insulator 702 is fixed in the through hole of the cover group body 701, and the pole 703 is passed through the insulator 702, so that the pole 703 is insulated and connected to the hole wall of the through hole of the cover group body 701; an insulating sheet 900 is arranged between the collecting plate 704 and the cover group body 701, and the two opposite surfaces of the insulating sheet 900 are respectively abutted against the first surface of the collecting plate 704, the cover group body 701 and the inner wall of the shell 300, so that the collecting plate 704 is insulated from the cover group body 701 and the inner wall of the shell 300.

[0069] Since the insulator 702 is fixed in the through hole of the cover group body 701, and the pole 703 is penetrated by the insulator 702, it is equivalent to that the insulator 702 is located between the pole 703 and the hole wall of the through hole, so that the pole 703 and the hole wall of the through hole are insulated from each other, and the insulator 702 has a long service life, and has good weather resistance, resistance to hydrofluoric acid corrosion and electrochemical corrosion, so that the service life of the power primary battery is extended, and the sealing reliability of the power primary battery is improved, thereby improving the storage life, environmental adaptability and use reliability of the power primary battery. In addition, the insulating sheet 900 is located between the first surface of the current collector 704 and the cover group body 701, and the two opposite surfaces of the insulating sheet 900 are respectively abutted against the first surface of the current collector 704, the cover group body 701 and the inner wall of the shell 300, so that the current collector 704 and the inner wall of the cover group body 701 and the shell 300 are insulated from each other. That is, by providing the insulator 702 and the insulating sheet 900 , it can be effectively ensured that the pole 703 is insulated from the shell 300 and the cover assembly body 701 .

[0070] It should be noted that, in the embodiment of the present invention, the current collecting plate 704 and the pole 703 can be formed of metal materials, wherein the metal materials forming the current collecting plate 704 and the pole 703 include but are not limited to Kovar alloy, copper, silver alloy, etc.

[0071] In addition, in some embodiments, the positive electrode plate 600 may include a positive electrode current collector, on which a positive electrode material layer is disposed, the positive electrode material layer including: an active substance, a conductive agent, and an aqueous adhesive, the mass ratio of the active substance, the conductive agent, and the aqueous adhesive being: 85wt% to 94.8wt%: 4wt% to 10wt%: 1.2wt% to 5wt%; wherein the active substance includes at least one of manganese dioxide, carbon fluoride, carbon fluoride-modified material, and metal oxide, and the aqueous adhesive includes at least one of sodium polyacrylate, sodium carboxymethyl cellulose, rubber emulsion, acrylic homopolymer, polyvinyl alcohol, acrylonitrile multipolymer, and conductive polymer binder.

[0072] Among them, through such a configuration, the positive electrode plate 600 can work effectively and stably, and the service life of the positive electrode plate 600 is prolonged.

[0073] It should be noted that, in the embodiment of the present invention, the positive electrode current collector may include but is not limited to aluminum foil, carbon-coated aluminum foil, 304 stainless steel foil, 316 stainless steel foil, etc.

[0074] In addition, in the embodiment of the present invention, the positive electrode sheet 600 can be made by a die-cutting process or a striping process, so that the shape of the positive electrode sheet 600 includes but is not limited to a strip, a circle, a quadrilateral, a polygon, a special shape, etc. In addition, for a wound battery core pack, the shape of the positive electrode sheet 600 of the battery core pack can be a strip, and for a laminated battery core pack, the shape of the positive electrode sheet 600 of the battery core pack can be one of a circle, a quadrilateral, a polygon, and a special shape.

[0075] In addition, in some embodiments, the power battery may further include an electrolyte, the electrolyte is located in the receiving cavity, and the ionic conductivity of the electrolyte is greater than or equal to 1.3×10 -5 s / cm, and the temperature range that the electrolyte can withstand is: -55℃~125℃. Through such a setting, the electrolyte can have better conductivity and a wider temperature range that the electrolyte can withstand, which is conducive to the power primary battery to work in a wider temperature range and expand the application range of the power primary battery.

[0076] In addition, in the embodiment of the present invention, a gas generation inhibiting additive of a corresponding chemical system may be added to the electrolyte, thereby preventing gas from being easily generated inside the power battery and further preventing the problem of bulging of the power battery.

[0077] In addition, in some embodiments, the diaphragm 400 has a first surface and a second surface facing each other, and a coating layer is disposed on the first surface and / or the second surface.

[0078] By providing a coating protective layer on the diaphragm, the coating layer effectively improves the diaphragm 400 to have better needle resistance, tensile strength, high temperature resistance and liquid absorption performance. In addition, the coating layer enables the diaphragm 400 to have higher conductivity and higher ion pass rate.

[0079] It should be noted that the coating protective layer may be provided only on the first surface of the diaphragm, or only on the second surface of the diaphragm, or of course, the coating protective layer may be provided on both the first surface and the second surface. This is not limited in the embodiments of the present invention.

[0080] In addition, in the embodiment of the present invention, the coating protective layer includes at least one of boehmite, polymer, and gel electrolyte. The coating protective layer may include only boehmite, only polymer, or only gel electrolyte; of course, the coating protective layer may also include any two of the three, boehmite, polymer, and gel electrolyte, or may include all three. This is not limited in the embodiment of the present invention.

[0081] In addition, in an embodiment of the present invention, when setting the diaphragm 400, the diaphragm 400 can be folded in half to cover the positive electrode sheet 600 or the negative electrode sheet 500 with the non-ear side edge of the positive electrode sheet 600 or the negative electrode sheet 500 as the folding line, and extend beyond the edge of the positive electrode sheet 600 or the negative electrode sheet 500 by 0.5mm to 3mm, and then heated and pressurized to fuse and adhere the portion extending beyond the edge of the positive electrode sheet 600 or the negative electrode sheet 500, so that the positive electrode sheet 600 or the negative electrode sheet 500 is covered therein.

[0082] In addition, in the embodiment of the present invention, the negative electrode plate 500 may be in the form of metal lithium or lithium-copper composite. For lithium-copper composite, a layer of metal lithium may be formed on the surface of copper foil by rolling or electroplating to form a lithium-copper composite sheet with a supporting structure. The copper foil may include microporous copper foil.

[0083] In addition, in the embodiment of the present invention, the shape of the power primary battery can be cylindrical, prismatic, polygonal or irregular, etc. The circumference of the envelope of the cover assembly 700 can be greater than 32 mm, and the circumference of the envelope of the housing 300 can also be greater than 32 mm.

[0084] In addition, an embodiment of the present invention further provides a method for processing a power primary battery, which is as follows:

[0085] A metal material is selected as the housing 300, wherein the metal material may be an aluminum silicon alloy. In addition, in an embodiment of the present invention, the housing 300 may be designed according to the structure of a 903665 lithium primary battery. Copper may then be selected as the material of the pole 703, the copper may be processed into the pole 703, and a threaded groove may be provided on the pole 703 of the pole 703. An insulator 702 may then be selected, the insulator 702 may be placed in a through hole on the housing 300, cooled and solidified at high temperature, and the thermistor assembly 800 may be connected to the current collector 704 of the pole 703 by an ultrasonic welding process. Then 91 parts of manganese dioxide and carbon fluoride composite active material, 7 parts of multi-component composite conductive agent, and 2 parts of aqueous binder are weighed, and a positive electrode slurry is prepared according to a pulping process, and the positive electrode slurry is coated on the positive electrode collector, the positive electrode collector may be a 304 stainless steel plate, and then dried, rolled, and striped to prepare a multi-ear positive electrode sheet 600. Then, a Li-1 lithium strip is used as the negative electrode material, and a 10 μm thick microporous copper foil is used as the negative electrode current collector. The lithium-copper composite strip is formed by rolling and kneading, and then the multi-ear negative electrode sheet 500 is formed by stripping. Then, a diaphragm coated with boehmite is selected, and the non-ear side edge of the negative electrode sheet 500 is used as the folding line. The diaphragm is folded in half to cover the negative electrode sheet 500, and it exceeds the edge of the sheet by 2 mm. Then, the portion exceeding the edge of the sheet is heated and pressurized to fuse and adhere, and the negative electrode sheet 500 is coated. Then, the positive electrode sheet 600 and the negative electrode sheet 500 coated with the diaphragm are placed in a winding machine with the ears on both sides of the roll to form a battery core pack. Then, the positive electrode sheet 600 is placed on the bottom cover plate 100 of the shell 300, and the bottom cover plate 100 is pushed after the positive electrode ear 601 is connected to the bottom cover plate 100 with an ultrasonic welder, and the battery core pack is placed in the shell 300. Then place the pole piece on one side of the thermistor assembly 800, and use an ultrasonic welder to complete the connection between the negative pole ear 501 and the thermistor assembly 800. Then, after the cover assembly 700 and the pole 703 are pressed into the shell 300 respectively, a laser welder is used to connect the cover assembly 700, the bottom cover plate 100 and the shell 300 into one. Finally, a vacuum injection system is used to inject the power primary battery for the first time through the injection hole 102 on the bottom cover plate 100, and then the injection hole 102 is sealed with a silicone rubber pre-sealing nail, and transferred to an anhydrous and oxygen-free glove box for standing. After standing for 4 hours, it is taken out, the silicone rubber pre-sealing nail is removed, and a vacuum injection system is used to inject the battery for the second time through the injection hole 102, and then the hole plugging member 200 is connected to the bottom cover plate 100, and the hole plugging member 200 is made to seal the injection hole 102 to form a power primary battery.

[0086] In addition, in the embodiment of the present invention, the power primary battery can be left in a natural state for 1 day, and after leakage detection, it can be discharged using a battery testing system to obtain a discharge curve. Figure 5As shown, it can be seen from the discharge curve that the curve is smooth and the temperature rise of the pole 703 is 10±1° C., so the power primary battery provided by the embodiment of the present invention has good performance.

[0087] In the embodiment of the present invention, since the positive electrode plate 600 adopts high-quality specific energy active material, the weight of the battery with the same capacity is reduced, and the battery weight requirement is met. Since the pole 703 and the cover assembly body 701 are sealed by the glass condensation of the insulator 702, the cover assembly 700 is welded to the first opening of the shell 300, the bottom cover plate 100 is welded to the second opening of the shell 300, and the hole plugging member 200 is pressed into or welded to seal the injection hole, the cover assembly 700, the shell 300, the bottom cover plate 100 and the hole plugging member 200 can enclose and form a sealed accommodating cavity completely isolated from the external environment, so that the positive electrode plate 600, the diaphragm 400, the negative electrode plate 500, the electrolyte, the thermistor assembly 800 and the insulating sheet are placed in the accommodating cavity to avoid leakage of the electrolyte or intrusion of foreign substances, resulting in a sudden drop in the battery electrical performance, and improve the battery storage life, environmental adaptability and safety. Since the positive electrode sheet 600 and the negative electrode sheet 500 are wrapped around each other or alternately stacked, a diaphragm 400 is arranged between the positive electrode sheet 600 and the negative electrode sheet 500, and the diaphragm 400 is hot-melt coated on the positive electrode sheet 600 or the negative electrode sheet 500. Therefore, the diaphragm 400 can isolate the positive electrode sheet 600 and the negative electrode sheet 500, thereby preventing the positive electrode sheet 600 and the negative electrode sheet 500 from being conductive, resulting in internal short circuit or micro short circuit problems in the power primary battery. Since each positive electrode plate 600 is formed with at least one positive electrode tab 601, each negative electrode plate 500 is formed with at least one negative electrode tab 501, the negative electrode plate 500 has a lithium copper composite sheet of a supporting structure, the pole 703 and the current collector 704 are one of copper and silver alloy high conductivity metals, and the upper end surface of the pole 703 is processed with an external threaded columnar body or an internal countersunk hole thread, so while improving the internal charge collection and overcurrent efficiency of the battery, the resistance and loss of the battery power output are reduced, thereby improving the battery discharge rate and overcurrent efficiency. Since the negative pole tab 501 is welded to one side of the bottom cover plate 100, the positive pole tab 601 is welded to the thermistor assembly 800, and the thermistor assembly 800 is welded to the current collector 704, the thermistor assembly 800 can be overheated inside the power primary battery, so that the safety of the power primary battery is improved. Since the electrolyte is selected from one of solid electrolyte, gel electrolyte or wide temperature electrolyte, and contains additives for suppressing gas generation in the corresponding electrochemical system battery, the safety of battery storage and use, as well as adaptability to extreme environmental conditions are improved.That is, in the present invention, by using high-quality specific energy active materials, the negative electrode sheet 500 has a support structure, each positive electrode sheet 600 and each negative electrode sheet 500 are formed with at least one pole ear, the diaphragm 400 is hot-melt-coated with the positive electrode sheet 600 or the negative electrode sheet 500, the pole 703 and the current collecting plate 704 are made of high-conductivity metal, the pole 703 and the cover assembly body 701 are sintered and sealed by the insulator 702, and the solid electrolyte, gel electrolyte, etc. are selected. In one of the electrolytes or wide temperature electrolytes, the upper end surface of the pole 703 is processed with an external threaded column or an internal countersunk thread, a thermistor assembly 800 is arranged inside the battery, and the positive pole ear 601 is connected to the current collecting plate 704 through the thermistor assembly 800. In addition, the cover assembly 700, the shell 300, the bottom cover plate 100 and the hole plugging member 200 are enclosed to form a sealed accommodating cavity, thereby improving the discharge rate, discharge efficiency, storage life, environmental adaptability and reliability of the battery. That is, in the present invention, the power primary battery can meet multiple requirements such as wide temperature, light weight, high rate, and reliable output of electrical energy.

[0088] An embodiment of the present invention provides an electric device, which includes the power primary battery in any one of the above embodiments.

[0089] It should be noted that electrical equipment may include but is not limited to unmanned aerial vehicles, underwater equipment, etc.

[0090] Although the present invention has been described in conjunction with specific features and embodiments thereof, it is apparent that various modifications and combinations may be made thereto without departing from the spirit and scope of the present invention. Accordingly, this specification and the accompanying drawings are merely exemplary illustrations of the present invention as defined by the appended claims and are deemed to cover any and all modifications, variations, combinations or equivalents within the scope of the present invention. Obviously, those skilled in the art may make various modifications and variations to the present invention without departing from the spirit and scope of the present invention. Thus, the present invention is intended to include such modifications and variations if they fall within the scope of the claims of the present invention and their equivalents.

Claims

1. A high mass specific energy power primary battery, characterized in that: It includes a bottom cover plate, a hole plugging member, a shell, an insulating sheet, a thermistor assembly, a battery core pack, an electrolyte and a cover assembly; The bottom cover plate is provided with a liquid injection hole, a ring-shaped or cross-shaped explosion-proof notch line is engraved on the bottom cover plate, and a hole-blocking member is arranged in the liquid injection hole, and the hole-blocking member seals the liquid injection hole; The shell is a hollow cylindrical structure, with a first opening and a second opening at both ends respectively, the cover assembly covers the first opening, the bottom cover plate covers the second opening, and the cover assembly, the shell, the bottom cover plate and the hole blocking member are welded together to form a receiving cavity; The insulating sheet, the thermistor assembly, the battery core pack, and the electrolyte are located in the accommodating cavity; The battery core pack comprises a negative electrode sheet, a separator, and a positive electrode sheet, wherein the negative electrode sheet and the positive electrode sheet are mutually wrapped or alternately stacked, and a separator is provided between the negative electrode sheet and the positive electrode sheet to isolate the positive electrode sheet from the negative electrode sheet; The cap assembly comprises a cap assembly body, an insulator, a pole and a current collecting plate, at least part of the pole is located in the battery cavity, the cap assembly body is provided with a through hole, the pole is passed through the through hole, part of the pole is located outside the battery, the pole is insulated and connected to the hole wall of the through hole by an insulator, and the pole is insulated from the inner wall of the battery cavity; Each of the negative electrode sheets is formed with at least one negative electrode tab, and each of the positive electrode sheets is formed with at least one positive electrode tab, the positive electrode tab is connected to one end of the thermistor assembly, the other end of the thermistor assembly is connected to the current collecting plate, the current collecting plate is connected to the pole, and the negative electrode tab is connected to the inner end surface of the bottom cover plate.

2. A high mass specific energy power primary battery according to claim 1, characterized in that: The bottom cover plate, shell, cover assembly body and hole plugging member are made of the same material, which is any one of stainless steel, aluminum alloy and titanium alloy.

3. A high mass specific energy power primary battery according to claim 1, characterized in that: The current collecting plate has a first surface and a second surface opposite to each other, the pole is fixed to the first surface, and the thermistor assembly is connected to the second surface; The pole and the current collecting plate are made of the same material, which is one of copper and silver alloy. The pole is provided with an external thread or an internal thread countersunk hole to facilitate the connection of an external conductive connecting piece. The insulator is a glass body, which is sintered and solidified in the through hole of the pole and the cover assembly body, and solidified to the pole and the hole wall of the through hole through the insulator; The glass body has weather resistance, resistance to hydrofluoric acid corrosion and electrochemical corrosion, as well as insulation, and balances the thermal stress and structural stress of the pole, the insulator, and the cover assembly body caused by different thermal expansion and contraction coefficients of different materials.

4. A high mass specific energy power primary battery according to claim 1, characterized in that: The insulating sheet is located between the current collecting plate and the cover group body, and two opposite surfaces of the insulating sheet are respectively in contact with one side of the cover group body and the inner wall of the shell, so that the current collecting plate and the pole are insulated from the inner wall of the shell.

5. A high mass specific energy power primary battery according to claim 1, characterized in that: The positive electrode sheet adopts high-quality specific energy active material, and is mixed according to the ratio of active material: conductive agent: aqueous binder of 85% to 94.8%: 4% to 10%: 1.2% to 5%, and is coated on the positive electrode current collector, and is cut into strips or die-cut into one of strips, circles, quadrilaterals, polygons, and special shapes; The high mass specific energy active material includes but is not limited to at least one of manganese dioxide, carbon fluoride, carbon fluoride modified composite material, and metal oxide; The binder is at least one of sodium polyacrylate, sodium carboxymethyl cellulose, rubber latex, acrylic acid homopolymer, polyvinyl alcohol, acrylonitrile multipolymer, and conductive polymer binder.

6. A high mass specific energy power primary battery and electrical equipment according to claim 1, characterized in that: The negative electrode plate uses metallic lithium as the negative electrode active material, and the metallic lithium is covered on the copper foil by roller pressing or electroplating; the copper foil includes microporous copper foil.

7. A high mass specific energy power primary battery according to claim 1, characterized in that: The separator is selected to have a single-sided or double-sided coating layer, and the separator is tightly wrapped around the positive electrode sheet or the negative electrode sheet by hot pressing and fusing the edges; The coating layer includes at least one of boehmite, a polymer and a gel electrolyte.

8. A high mass specific energy power primary battery according to claim 1, characterized in that: The electrolyte is selected from one of solid electrolyte, gel electrolyte or wide temperature electrolyte; The wide temperature electrolyte has an ion conductivity greater than or equal to 1.3×10 -5 s / cm, and the operating temperature range is -55°C to 125°C, and contains additives for suppressing gas generation in the corresponding electrochemical system battery.

9. A high mass specific energy power primary battery according to claim 1, characterized in that: The circumference of the extreme envelope of the galvanic cell is greater than 32 mm, and the galvanic cell is cylindrical, prismatic, polygonal or irregularly shaped.

10. An electrical device, characterized in that: The electrical equipment comprises a high-quality energy-density power primary battery as described in any one of claims 1-9.

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