High mass specific energy power primary battery and electric equipment

Abstract

The utility model discloses a power primary battery with high mass specific energy and electric equipment, and relates to the technical field of batteries. Comprising a bottom cover plate, a hole plugging piece, a shell, an insulating sheet, a thermistor assembly, a battery core bag, electrolyte and a cover group, the bottom cover plate is provided with a liquid injection hole, an annular or cross-shaped anti-explosion cutting line is engraved on the bottom cover plate, a hole blocking piece is arranged in the liquid injection hole, and the liquid injection hole is sealed by the hole blocking piece; the shell is of a hollow cylindrical structure, a first opening and a second opening are formed in the two ends of the shell respectively, the first opening is covered with the cover set, the second opening is covered with the bottom cover plate, and the cover set, the shell, the bottom cover plate and the hole blocking piece are welded in an enclosed mode to form a containing cavity; the insulating sheet, the thermistor assembly, the battery core bag and the electrolyte are positioned in the accommodating cavity; the battery core bag comprises a negative pole piece, a diaphragm and a positive pole piece, the negative pole piece and the positive pole piece are mutually wrapped or alternately overlapped, and the diaphragm is arranged between the negative pole piece and the positive pole piece so as to isolate the positive pole piece from the negative pole piece.

Description

TECHNICAL FIELD

[0001] The utility model belongs to primary battery (primary cell) technical field, relate to high quality specific energy power primary battery design, manufacture, and high rate, high safety, extreme environment, harsh use condition, long storage period field primary battery use and electric equipment. BACKGROUND

[0002] In the current electrochemical system, lithium / manganese dioxide, lithium / carbon fluoride and lithium / metal oxide primary battery (primary cell) has higher specific energy than energy storage battery (secondary cell) and lower self-discharge rate, especially in the portable and use without charging, extreme environment (-40 DEG C low temperature, 100 DEG C above high temperature) use, weight limit and large current work unmanned equipment or equipment, and long storage period requirement field, primary battery realizes high specific energy and specific power has important significance.

[0003] High specific energy and specific power primary battery, in addition to the positive active material characteristics and positive electrode preparation technology limit, battery structure assembly and assembly process are also the key to restrict the high specific energy and specific power output of primary battery, need in battery structure assembly and assembly process systematic breakthrough, develop a kind of high quality specific energy power primary battery, to meet the extreme environment, special condition application field to the demand of primary battery (primary cell). UTILITY MODEL CONTENTS

[0004] The utility model aims at, through adopting high specific energy and specific power positive active material preparation positive plate, tab full tab (including multi-tab) structure, diaphragm cladding tab, high conductivity pole, glass sealing insulation and other technical measures, systematically solve the problem of metal lithium primary battery 5C above continuous high rate current output, wide temperature (-55 DEG C~125 DEG C) environment use, 10 times above gravity acceleration overload impact, environmental temperature impact, 10 years above long-term storage, meet the high rate, high safety, extreme environment, harsh use condition, long storage period field primary battery (primary cell) use requirement.

[0005] The utility model also relates to the structure composition and purpose of power primary battery, and realizes the utility model purposes by adopting the following technical schemes.

[0006] The utility model provides a kind of high quality specific energy power primary battery, it include: plugging, bottom cover plate, shell, battery core package, electrolyte, thermistor component, insulating sheet and cover group;

[0007] The bottom cover plate, ring or cross-shaped explosion-proof score line is inscribed in one plane thereof. Preferably, the depth of the explosion-proof score line is 1 / 3 to 1 / 2 of the thickness of the bottom cover plate.

[0008] Further, the bottom cover plate is provided with a liquid injection hole, and a hole plugging element is arranged in the liquid injection hole to press or weld the liquid injection hole.

[0009] The shell is a hollow cylindrical structure, and the first opening and the second opening are arranged at two ends of the shell respectively. The cover group is combined with the first opening, and the bottom cover plate is combined with the second opening. The cover group, the shell, the bottom cover plate and the hole plugging element are welded to form a sealed containing cavity which is completely isolated from the outside. The insulating sheet, the thermistor assembly, the battery core package and the electrolyte are located in the containing cavity, so as to improve the storage life of the battery and the safety and environmental adaptability of the battery.

[0010] The battery core package comprises a positive electrode sheet, a diaphragm and a negative electrode sheet. The positive electrode sheet and the negative electrode sheet are wrapped around each other or alternately stacked, and the diaphragm is arranged between the positive electrode sheet and the negative electrode sheet to isolate the positive electrode sheet and the negative electrode sheet. Optionally, the positive electrode sheet and the negative electrode sheet are each at least one sheet.

[0011] Further, the positive electrode sheet adopts a high mass specific energy active material, and is mixed according to an active material: a conductive agent: an aqueous binder at 85% to 94.8%: 4% to 10%: 1.2% to 5%. The positive electrode sheet is coated on a positive electrode current collector, and is cut or die-cut into one of a strip shape, a circular shape, a quadrilateral shape, a polygonal shape and a special shape.

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

[0013] Further, the binder is at least one of sodium polyacrylate, sodium carboxymethyl cellulose, rubber emulsion, acrylic acid homopolymer, polyvinyl alcohol, acrylonitrile multicomponent copolymer and conductive polymer binder.

[0014] Further, the positive electrode current collector is one of an aluminum foil, a 304 stainless steel foil and a 316 stainless steel foil. Preferably, the current collector is one of the 304 stainless steel foil and the 316 stainless steel foil.

[0015] Further, the positive electrode sheet cut or die-cut into one of a strip shape, a circular shape, a quadrilateral shape, a polygonal shape and a special shape. Preferably, the positive electrode sheet of the wound type battery core package is in a strip shape, and the positive electrode sheet of the stacked type battery core package is one of a circular shape, a quadrilateral shape, a polygonal shape and a special shape.

[0016] Further, the diaphragm is one of a diaphragm with a single-sided or double-sided coating layer and a PEP diaphragm. Preferably, the diaphragm is a diaphragm with a single-sided or double-sided coating layer.

[0017] Further, the separator with single or double coating layer, the coating layer includes at least one of boehmite, polymer, gel electrolyte.

[0018] Further, the separator, the hot-pressing melting edge is coated on the positive electrode tab or the negative electrode tab, which effectively avoids the internal micro-short circuit problem of the battery, and causes the battery performance to decline.

[0019] Further, the hot-pressing melting edge coating is folded along the non-tab side edge of the positive electrode tab or the negative electrode tab as a folding line, the separator is folded to coat the positive electrode tab or the negative electrode tab, and exceeds the edge of the tab by 0.5mm-3mm, and then the edge of the tab is fused and adhered by heating and pressing, so that the positive electrode tab or the negative electrode tab is coated therein.

[0020] Further, the negative electrode tab adopts one of metal lithium and lithium-copper composite. Preferably, the lithium-copper composite is adopted; the negative electrode tab adopts metal lithium as a negative active material; the lithium-copper composite is formed by rolling or electroplating a layer of metal lithium on the surface of a copper foil to make a lithium-copper composite sheet with a supporting structure, which improves the structural strength of the tab and the current collection and large current load capacity. The copper foil includes a microporous copper foil.

[0021] Further, the negative electrode tab is divided into strips or die-cut into one of a strip, a circle, a quadrilateral, a polygon, and a special shape after being coated with a release film. Preferably, the negative electrode tab of the wound battery core package is a strip, and the negative electrode tab of the stacked battery core package is one of a circle, a quadrilateral, a polygon, and a special shape.

[0022] Further, each of the positive electrode tabs is formed with at least one positive electrode tab, and each of the negative electrode tabs is formed with at least one negative electrode tab. The electrode tabs of the positive electrode tab and the negative electrode tab are one of multiple electrode tabs and full electrode tabs. The positive electrode tabs and the negative electrode tabs are first welded together, and then the negative electrode tabs are connected to the bottom cover plate. The positive electrode tabs are connected to the thermistor assembly, and the thermistor assembly is connected to the pole.

[0023] Further, the electrolyte is selected from one of a solid-state electrolyte, a gel-state electrolyte, and a wide-temperature electrolyte. When a solid-state or gel-state electrolyte is used as an ion exchange medium, there is no liquid injection process in the manufacturing.

[0024] Further, the wide-temperature electrolyte has an ionic conductivity greater than or equal to 1.3x10 -5 s / cm, and a working temperature range of -55℃-125℃, and contains an additive for inhibiting gas generation in a corresponding electrochemical system battery, and is subjected to secondary injection.

[0025] Further, the battery electrolyte injection adopts a segmented secondary injection process, that is, the first electrolyte injection of the battery is sealed by a pre-sealing element, and the pre-sealing element is placed in a waterless and oxygen-free environment for a period of time, the pre-sealing element is removed, the second electrolyte injection is performed, the hole plugging element is pressed, or the injection hole is welded and sealed.

[0026] The thermistor assembly is a high polymer PTC thermistor, has a unique positive temperature coefficient resistance characteristic, avoids external short circuit of the battery, and causes a use safety problem.

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

[0028] The cover group comprises a cover group body, an insulator, a pole and a current collecting plate, is a circular, rectangular, square, polygonal or special-shaped combination, at least part of the poles are located in the battery inner cavity, the cover group body is provided with a through hole, the poles are arranged in the through hole, part of the poles are located outside the battery, the poles and the hole wall of the through hole are insulated and connected through the insulator, and the poles and the inner wall of the battery inner cavity are mutually insulated. Preferably, the battery pole end envelope line length is greater than 32 mm.

[0029] Further, the cover group body is provided with a through hole, the poles are arranged in the through hole, the lower end surface of the pole is located in the battery inner cavity, and the upper end surface of the pole is located outside the battery.

[0030] Further, the insulator is a glass body with weather resistance, fluorohydrogen acid corrosion resistance and electrochemical corrosion resistance, insulation, and balance of thermal stress and structural stress of the pole, the insulator and the cover group body caused by different thermal expansion and cold shrinkage coefficients of different materials, and the glass body is fused and injected into the gap between the pole and the cover group body, and the pole and the cover group body are bonded after cooling and solidification, so that the pole and the hole wall of the through hole are insulated and sealed, the sealing reliability of the battery is improved, and the storage life, environmental adaptability and use reliability of the battery are improved.

[0031] Further, the pole comprises a pole upper end surface and a pole lower end surface, and the diameter is 4mm-10mm, the pole upper end surface is partially processed with an external threaded cylindrical body or an internal counterbore thread, is used for connecting an electric connecting sheet through a nut or a screw, and improves the convenience of battery series and parallel connection and the overcurrent efficiency of the battery pack.

[0032] Further, the current collecting plate has opposite first and second faces, the first face is connected with the pole, and the second face is connected with the thermistor assembly, and the pole plate is located in the accommodating cavity.

[0033] Further, the pole and the current collecting plate are made of the same material, which is one of Kovar alloy, aluminum alloy, red copper and silver alloy, and the pole has one of a rectangular, T-shaped and I-shaped axial section.

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

[0035] Further, the cover assembly body, the shell and the bottom cover are made of the same material, which is any one of stainless steel, aluminum alloy and titanium alloy.

[0036] In the second aspect, the utility model provides a kind of electric equipment, and the electric equipment includes the high-quality specific energy power primary battery of any one in the above first aspect.

[0037] In the utility model, since the positive pole piece adopts high quality specific energy active substance, therefore, reduce the weight of battery under the same capacity, satisfy the use of the field of demanding battery weight, since the pole and the cover group body are sealed through the glass body of insulator, the cover group is welded on the first opening of shell, the bottom cover plate is welded on the second opening of shell, the hole plug member is pressed or welded to block the liquid injection hole, therefore, the cover group, shell, bottom cover plate and hole plug member can be enclosed to form sealed containing cavity which is completely isolated from the outside environment, thereby the positive pole piece, diaphragm, negative pole piece, electrolyte, thermistor assembly and insulating sheet are placed in the containing cavity, avoid the leakage of electrolyte or the invasion of external material, cause the sudden drop of battery electric performance, improve the storage life, environmental adaptability and safety of battery. Since the positive pole piece and the negative pole piece are mutually wrapped or alternately superimposed, the diaphragm is arranged between the positive pole piece and the negative pole piece, and the diaphragm hot melt edge covers the positive pole piece or the negative pole piece, therefore, the diaphragm can isolate the positive pole piece and the negative pole piece, avoid the conduction of the positive pole piece and the negative pole piece, cause the problem of internal short circuit or micro short circuit of power primary battery. Since each positive pole piece forms at least one pole lug, each negative pole piece forms at least one negative pole lug, the negative pole piece has lithium copper composite sheet with support structure, the pole and the current collecting plate are one of high conductivity metals of purple copper and silver alloy, the outer threaded columnar body or the inner counterbore thread is processed on the upper end surface of the pole, therefore, while improving the internal charge collection and overcurrent efficiency of battery, the resistance and loss of battery power output are reduced, and the discharge rate and overcurrent efficiency of battery are improved. Since the negative pole lug is welded and connected with the bottom cover plate, the positive pole lug is welded and connected with the thermistor assembly, and the thermistor assembly is welded and connected with the current collecting plate, therefore, the thermistor assembly can perform overheat protection in the power primary battery, and the safety of the power primary battery is improved. Since the electrolyte is one of solid electrolyte, gel electrolyte or wide temperature electrolyte, and contains corresponding electrochemical system battery gas generation additive, the safety of battery storage and use, and the adaptability to extreme environmental conditions are improved. That is, in the utility model, by adopting high quality specific energy active substance, the negative pole piece has support structure, each positive pole piece and each negative pole piece form at least one negative pole lug, the diaphragm hot melt covers the positive pole piece or the negative pole piece, the pole and the current collecting plate are high conductivity metals, the pole and the cover group body are insulated and connected through insulator sintering sealing, one of solid electrolyte, gel electrolyte or wide temperature electrolyte is selected, the outer threaded columnar body or the inner counterbore thread is processed on the upper end surface of the pole, the thermistor assembly is arranged in the battery, the positive pole lug is connected with the current collecting plate through the thermistor assembly, in addition, the cover group, shell, bottom cover plate and hole plug member enclose to form sealed containing cavity, so that the discharge rate, discharge efficiency, storage life, environmental adaptability and reliability of battery can be improved. That is, in the utility model, the power primary battery can meet various requirements such as wide temperature, light weight, high rate and reliable output power. BRIEF DESCRIPTION OF DRAWINGS BRIEF DESCRIPTION OF DRAWINGS

[0038] The accompanying drawings, which are included to provide a further understanding of the application and are incorporated in and constitute a part of this application, illustrate embodiments of the application and together with the description serve to explain the application. In the drawings:

[0039] Figure 1 A schematic diagram of a battery structure of the present application.

[0040] Figure 2 A schematic diagram of a battery cover group structure of the present application.

[0041] Figure 3 A schematic diagram of a diaphragm hot-pressing coated pole piece of the present application.

[0042] Figure 4 A schematic diagram of a battery bottom cover plate structure of the present application.

[0043] Figure 5 A 10C discharge curve diagram of a nominal capacity 5Ah high-quality specific energy power primary battery of the present application.

[0044] Reference signs: 100-bottom cover plate, 101-explosion-proof score line, 102-liquid injection hole, 200-hole plugging piece, 300-housing, 400-diaphragm, 500-negative pole piece, 501-negative pole lug, 600-positive pole piece, 601-positive pole lug, 700-cover group, 701-cover group body, 702-insulator, 703-pole, 704-current collecting plate, 800-thermistor assembly, 900-upper insulating sheet. DETAILED DESCRIPTION

[0045] In order to clearly describe the technical scheme of the embodiments of the present application, in the embodiments of the present application, the same items or similar items with basically the same function and role are distinguished by using "first", "second" and the like. For example, the first threshold value and the second threshold value are used to distinguish different threshold values, and the order is not limited. Those skilled in the art can understand that "first", "second" and the like do not limit the number and execution order, and "first", "second" and the like do not necessarily mean different.

[0046] It should be noted that in the present application, the words "exemplary" or "for example" are used to mean serving as an example, instance, or illustration. Any embodiment or design described as "exemplary" or "for example" in the present application should not be construed as being more preferred or advantageous than other embodiments or designs. Rather, the use of the words "exemplary" or "for example" is intended to present concepts in a concrete manner.

[0047] In this invention, "at least one" refers to one or more, and "more than one" refers to two or more. "And / or" describes the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A alone, A and B simultaneously, or B alone, where A and B can be singular or plural. The character " / " generally indicates that the preceding and following related objects are in an "or" relationship. "At least one of the following" or similar expressions refer 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 represent: a, b, c; a combination of a and b; a combination of a and c; a combination of b and c; or a combination of a, b, and c, where a, b, and c can be single or multiple.

[0048] This utility model embodiment provides a power primary battery, such as Figures 1 to 4 As shown, the power primary battery includes: a bottom cover plate 100, a plugging component 200, a shell 300, a negative electrode plate 500, a separator 400, a positive electrode plate 600, a thermistor assembly 800, an electrolyte, an insulating sheet 900, and a cover assembly 700.

[0049] The shell 300 is a hollow cylindrical structure with a first opening and a second opening at both ends. The cover assembly covers the first opening, and the bottom cover plate covers the second opening. The cover assembly, shell, bottom cover plate, and plugging parts are welded together to form a receiving cavity.

[0050] Multiple positive electrode plates 600, multiple negative electrode plates 500, a diaphragm 400, a thermistor assembly 800, an electrolyte, and an insulating sheet 900 are all located in a receiving cavity. The positive electrode plates 600 and negative electrode plates 500 are mutually wrapped or alternately stacked. A diaphragm 400 is provided between the positive electrode plates 600 and the negative electrode plates 500 to isolate them. The cover assembly 700 includes a cover assembly body 701, an insulator 702, a pole post 703, and a current collector 704. The cover assembly body 701 covers the first opening, and at least a portion of the pole post 703 is located within the receiving cavity. In the cavity, the cover body 701 is provided with a through hole, and the pole post 703 passes through the through hole. Some of the pole posts 703 are located outside the cavity. The pole posts 703 are insulated from the hole wall of the through hole, and the pole posts 703 are insulated from the inner wall of the housing 300. Each positive electrode 600 has at least one positive electrode tab 601, and each negative electrode 500 has at least one negative electrode tab 501. The negative electrode tab 501 is connected to the bottom cover plate 100, the positive electrode tab 601 is connected to the thermistor assembly 800, and the thermistor assembly 800 is connected to the pole post 703.

[0051] In this embodiment of the invention, since the positive electrode 600 uses a high-quality high-energy-density active material, the weight of the battery with the same capacity is reduced, meeting the requirements of fields with stringent battery weight requirements. Because the terminal post 703 and the cover assembly body 701 are sealed by the glass solidification of the insulator 702, the cover assembly 700 is welded to the first opening of the housing 300, the bottom cover plate 100 is welded to the second opening of the housing 300, and the plugging component 200 is pressed in or welded to seal the electrolyte injection hole, the cover assembly 700, housing 300, bottom cover plate 100, and plugging component 200 can form a sealed cavity completely isolated from the external environment. This allows the positive electrode 600, separator 400, negative electrode 500, electrolyte, thermistor assembly 800, and insulating sheet to be placed within the cavity, preventing electrolyte leakage or intrusion of external substances that could cause a sudden drop in battery performance, thus improving battery storage life, environmental adaptability, and safety. Since the positive electrode 600 and the negative electrode 500 wrap around each other or are alternately stacked, and a separator 400 is provided between the positive electrode 600 and the negative electrode 500, and the separator 400 is heat-fused and wrapped around the positive electrode 600 or the negative electrode 500, the separator 400 can isolate the positive electrode 600 and the negative electrode 500, and prevent the positive electrode 600 and the negative electrode 500 from conducting, which would lead to a short circuit or micro short circuit inside the power battery. Since each positive electrode 600 has at least one positive electrode tab 601 and each negative electrode 500 has at least one negative electrode tab 501, and the negative electrode 500 has a lithium-copper composite sheet with a supporting structure, and both the terminal post 703 and the current collector 704 are made of one of the high-conductivity metals, namely copper or silver alloy, and the upper end face of the terminal post 703 is machined with an externally threaded column or an internally countersunk thread, the battery's internal charge collection and overcurrent efficiency are improved while the resistance and loss of the battery's power output are reduced, thereby improving the battery's discharge rate and overcurrent efficiency. Since the negative electrode tab 501 is welded to one side of the bottom cover plate 100, the positive electrode 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 provide overheat protection inside the power primary battery, thus improving the safety of the power primary battery. Because the electrolyte is selected from one of the following: solid electrolyte, gel electrolyte, or wide-temperature electrolyte, and contains additives that suppress gas generation in the corresponding electrochemical system, the safety of battery storage and use, as well as its adaptability to extreme environmental conditions, are improved.That is, in the utility model, through adopting high quality specific energy active substance, the negative pole piece 500 has support structure, at least one tab is formed with each positive pole piece 600 and each negative pole piece 500, the diaphragm 400 heat fusion cladding positive pole piece 600 or negative pole piece 500, the pole 703 and the current collecting plate 704 are in high conductivity metal, the insulator 702 sintering sealing insulation connects the pole 703 and the cover group body 701, select 1 of solid electrolyte, gel state electrolyte or wide temperature electrolyte, the pole 703 upper end face portion is processed with external thread columnar body or internal counterbore thread, the heat sensitive resistance assembly 800 is arranged in the battery, and the positive pole tab 601 is connected with the current collecting plate 704 through the heat sensitive resistance assembly 800, in addition, the cover group 700, the shell 300, the bottom cover plate 100 and the hole plugging part 200 are enclosed to form sealed containing cavity, so as to can promote the discharge rate, discharge efficiency, storage life, environmental adaptability, reliability of battery.That is, in the utility model, the power primary battery can satisfy wide temperature, light weight, high rate, reliable output electric energy and a variety of requirements such as electric energy.

[0052] It should be noted that, in the embodiment of the utility model, each positive pole piece 600 can be connected with one positive pole tab 601, of course, each positive pole piece 600 can also be connected with multiple positive pole tabs 601. For this, the embodiment of the utility model does not limit here. Of course, in the embodiment of the utility model, the positive pole piece 600 can also be used as the positive pole tab 601. In addition, each negative pole piece 500 can be connected with one negative pole tab 501, of course, each negative pole piece 500 can also be connected with multiple negative pole tabs 501. For this, the embodiment of the utility model does not limit here. Of course, in the embodiment of the utility model, the negative pole piece 500 can also be used as the negative pole tab 501. When each positive pole piece 600 is connected with multiple positive pole tabs 601, and each negative pole piece 500 is connected with multiple negative pole tabs 501, at this time, it is equivalent to setting in the power primary battery according to the mode of multiple tabs. When the positive pole piece 600 is used as the positive pole tab 601, and the negative pole piece 500 is used as the negative pole tab 501, at this time, it is equivalent to setting in the power primary battery according to the mode of full tab.

[0053] In addition, in the utility model embodiment, the shell 300, the cover group body 701, the bottom cover plate 100 and the hole plugging piece 200 can be made of the same metal material, which can include but is not limited to stainless steel, aluminum alloy, titanium alloy, etc. In addition, when the shell 300 is made of stainless steel or titanium alloy, the thickness of the shell 300 can be any value in the range of 0.1mm to 1.0mm, for example, the thickness of the shell 300 is 0.1mm, for another example, the thickness of the shell 300 is 0.5mm, and for another example, the thickness of the shell 300 is 1mm. When the shell 300 is made of aluminum alloy, the thickness of the shell 300 can be any value in the range of 0.5mm to 3.0mm, for example, the thickness of the shell 300 is 0.5mm, for another example, the thickness of the shell 300 is 1mm, for another example, the thickness of the shell 300 is 3mm, and for another example, the thickness of the shell 300 is 3mm.

[0054] In addition, in the utility model embodiment, the cover group body 701, the shell 300 and the bottom cover plate 100 can be matched with each other according to a tolerance, and a full-sealing battery inner cavity is formed by a sealing and connecting welding.

[0055] In addition, in the utility model embodiment, a diaphragm 400 can be arranged between the positive electrode sheet 600 and the shell 300, and the diaphragm 400 can be used to wrap the positive electrode sheet 600 or the negative electrode sheet 500 and extend 0.5mm to 3mm beyond the edge of the sheet, and a hot-pressed fusion edge is wrapped on the positive electrode sheet 600 or the negative electrode sheet 500 to form the negative electrode sheet 500 or the positive electrode sheet 600 wrapped by the diaphragm 400.

[0056] In addition, in some embodiments, the pole 703 can include a current collecting plate 704 and the pole 703, the current collecting plate 704 has opposite first and second surfaces, the pole 703 is fixed to the first surface, and 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 arranged in the through hole, and part of the pole 703 is located outside the shell 300; the pole 703 is insulatedly connected with the hole wall of the through hole, and the current collecting plate 704 is insulated from the inner wall of the shell 300.

[0057] 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 arranged in the through hole, and part of the pole 703 is located outside the shell 300, therefore, the component to be connected can be connected through the part of the pole 703 located outside the shell 300, so as to transmit the electric energy of the power primary battery to the component 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 perform overheat protection on the current collecting plate 704, so as to avoid that too much heat is transmitted to the current collecting plate 704, thereby improving the safety of the power primary battery. In addition, the pole 703 is insulatively connected with the hole wall of the through hole, and the current collecting plate 704 is insulatively connected with the inner wall of the shell 300, so as to ensure that the positive pole piece 600 and the negative pole piece 500 are insulatively connected with each other, thereby avoiding that the positive pole piece 600 and the negative pole piece 500 are conductively connected with each other, so as to cause the problem of short circuit in the power primary battery.

[0058] In addition, in some embodiments, the part of the pole 703 located outside the shell 300 is provided with a threaded counterbore, and the threaded counterbore is used for connecting with the component to be connected.

[0059] By arranging the threaded counterbore on the pole 703, when it is required to connect the power primary battery with the component to be connected, the component to be connected can be directly connected to the threaded counterbore, so as to connect the component to be connected with the pole 703. That is, by arranging the threaded counterbore on the pole 703, the power primary battery can be conveniently connected with the component to be connected.

[0060] It should be noted that, in the embodiment of the utility model, the component to be connected can be another power primary battery, so as to equivalently connect the current power primary battery with the other power primary battery through the bolt and the electric connection piece, so as to connect the power primary batteries in series and in parallel.

[0061] In addition, in some embodiments, the bottom cover plate 100 is provided with a liquid injection hole 102, the liquid injection hole 102 is provided with a hole plugging piece 200, and the hole plugging piece 200 seals the liquid injection hole 102; wherein the surface of the bottom cover plate 100 away from the cover group 700 is provided with an anti-explosion scratch 101.

[0062] Since the bottom cover plate 100 is provided with the liquid injection hole 102, electrolyte can be injected into the accommodation 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 accommodation cavity to form electric energy. Since the liquid injection hole 102 is provided with the hole plugging piece 200, the liquid injection hole 102 can be plugged by the hole plugging piece 200 after the electrolyte is injected, so as to avoid leakage of the electrolyte from the liquid injection hole 102. In addition, the surface of the bottom cover plate 100 away from the cover group 700 is provided with the explosion-proof score line 101, so that once the temperature or air pressure inside the shell 300 is too high, the power primary battery may explode, the bottom cover plate 100 is damaged at the explosion-proof score line 101 first, so that the air pressure inside the shell 300 is released, the shell 300 is prevented from bursting, and the safety performance of the power primary battery is improved.

[0063] It should be noted that the shape of the explosion-proof score line 101 can be set according to actual needs, for example, the shape of the explosion-proof score line 101 is cross-shaped, and for another example, the shape of the explosion-proof score line 101 is circular. The specific shape of the explosion-proof score line 101 is not limited in the embodiment of the utility model.

[0064] In addition, in the embodiment of the utility model, the liquid injection hole 102 and the explosion-proof score line 101 can be located in the middle part of the bottom cover plate 100, so that when the electrolyte is injected through the liquid injection hole 102, the electrolyte can be more uniformly distributed in the shell 300, and when the air pressure inside the power primary battery is too high, the middle part of the bottom cover plate 100 bears more force, and the explosion-proof score line 101 is located in the middle part of the bottom cover plate 100, so that the bottom cover plate 100 can be damaged at the explosion-proof score line 101, thereby releasing pressure.

[0065] In addition, in the embodiment of the utility model, the materials of the cover group 700, the shell 300 and the bottom cover plate 100 can all be metal materials. The cover group 700 can be connected to one opening of the shell 300 by welding, and the bottom cover plate 100 can also be connected to the other opening of the shell 300 by welding. Of course, the cover group 700 can also be connected to one opening of the shell 300 by clamping.

[0066] In addition, in some embodiments, the cover group 700 can 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 arranged in the insulator 702, so that the pole 703 is insulatedly connected with the hole wall of the through hole of the cover group body 701; an insulating sheet 900 is arranged between the current collecting plate 704 and the cover group body 701, and the opposite two surfaces of the insulating sheet 900 are respectively abutted with the first surface of the current collecting plate 704, the cover group body 701 and the inner wall of the shell 300, so that the current collecting plate 704 and the inner wall of the shell 300 are insulated from each other.

[0067] Since the insulator 702 is fixed in the through hole of the cover group body 701, and the pole 703 is arranged in the insulator 702, the insulator 702 is equivalent to being 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 service life of the insulator 702 is long, the weather resistance, the resistance to fluorohydrogen acid corrosion and the electrochemical corrosion ability are good, so that the service life of the power primary battery is prolonged, and the sealing reliability of the power primary battery is improved, thereby improving the storage life, the environmental adaptability and the use reliability of the power primary battery. In addition, the insulating sheet 900 is located between the first surface of the current collecting plate 704 and the cover group body 701, and the opposite two surfaces of the insulating sheet 900 abut against the first surface of the current collecting plate 704, the cover group body 701 and the inner wall of the shell 300 respectively, so that the current collecting plate 704 and the inner wall of the shell 300 are insulated from each other. That is, by arranging the insulator 702 and the insulating sheet 900, the insulation between the pole 703 and the shell 300 and the cover group body 701 can be effectively ensured.

[0068] It should be noted that in the embodiments of the present application, the current collecting plate 704 and the pole 703 can be formed of metal materials, including but not limited to Kovar, red copper, silver alloy, etc.

[0069] In addition, in some embodiments, the positive electrode sheet 600 can include a positive electrode current collector, and the positive electrode current collector is provided with a positive electrode material layer, and the positive electrode material layer includes: active material, conductive agent and water-based adhesive, and the mass ratio of the three is: 85wt%-94.8wt%: 4wt%-10wt%: 1.2wt%-5wt%; wherein the active material includes at least one of manganese dioxide, carbon fluoride, carbon fluoride modified material and metal oxide, and the water-based adhesive includes at least one of sodium polyacrylate, sodium carboxymethyl cellulose, rubber emulsion, acrylic homopolymer, polyvinyl alcohol, acrylonitrile multivariate copolymer and conductive polymer binder.

[0070] Through such an arrangement, the positive electrode sheet 600 can work effectively and stably, and the service life of the positive electrode sheet 600 is long.

[0071] It should be noted that in the embodiments of the present application, the positive electrode current collector can include but is not limited to aluminum foil, carbon-coated aluminum foil, 304 stainless steel foil, 316 stainless steel foil, etc.

[0072] In addition, in the embodiment of the utility model, the positive pole piece 600 can be made by die cutting process or slitting process, so that the shape of the positive pole piece 600 includes but is not limited to strip, circle, quadrilateral, polygon, special shape and the like. In addition, for the winding type battery core package, the shape of the positive pole piece 600 of the battery core package can be strip, and for the laminated type battery core package, the shape of the positive pole piece 600 of the battery core package can be one of circle, quadrilateral, polygon and special shape.

[0073] In addition, in some embodiments, the power primary battery can further include electrolyte, the electrolyte is located in the accommodating cavity, 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 DEG C~125 DEG C. Through such setting, the electrolyte can have better conductivity, and the temperature range that the electrolyte can withstand is larger, so that the power primary battery can work in a larger temperature range, and the application range of the power primary battery is expanded.

[0074] In addition, in the embodiment of the utility model, the electrolyte can add the gas generation inhibitor of the corresponding chemical system, so that the power primary battery can avoid the gas generated in the power primary battery, and the problem of the power primary battery being easy to bulge can be avoided.

[0075] In addition, in some embodiments, the diaphragm 400 has a first surface and a second surface, and the first surface and / or the second surface is provided with a coating layer.

[0076] By setting the coating protective layer on the diaphragm, the coating layer effectively improves the diaphragm 400 to have better needle resistance, tensile resistance, high temperature resistance and liquid absorption performance, in addition, the coating layer makes the diaphragm 400 have higher conductivity and higher ion passing rate.

[0077] It should be noted that the coating protective layer can be provided only on the first surface of the diaphragm, and the coating protective layer can also be provided only on the second surface of the diaphragm, of course, the coating protective layer can also be provided on the first surface and the second surface. For this, the embodiment of the utility model is not limited here.

[0078] In addition, in the embodiment of the utility model, the coating protective layer includes at least one of boehmite, polymer and gel electrolyte. Among them, the coating protective layer can only include boehmite, and can also only include polymer, and can also only include gel electrolyte; of course, the coating protective layer can also include any two of boehmite, polymer and gel electrolyte, and can also include boehmite, polymer and gel electrolyte. For this, the embodiment of the utility model is not limited here.

[0079] In addition, in the embodiment of the utility model, when the diaphragm 400 is arranged, the diaphragm 400 can be folded to cover the positive pole piece 600 or the negative pole piece 500 with the non-tab side edge of the positive pole piece 600 or the negative pole piece 500 as the folding line, and the diaphragm 400 exceeds the edge of the positive pole piece 600 or the negative pole piece 500 by 0.5mm-3mm, then the part of the positive pole piece 600 or the negative pole piece 500 which exceeds the edge is fused and adhered by heating and pressing, so that the positive pole piece 600 or the negative pole piece 500 is covered.

[0080] In addition, in the embodiment of the utility model, the negative pole piece 500 can adopt one of the metal lithium and lithium-copper composite forms. For the lithium-copper composite, a layer of metal lithium can be formed on the surface of the copper foil by rolling or electroplating to make a lithium-copper composite piece with a supporting structure. The copper foil can include a microporous copper foil.

[0081] In addition, in the embodiment of the utility model, the shape of the power primary battery can be cylindrical, prismatic, polygonal or irregular, etc. The envelope circumference of the cover group 700 can be greater than 32mm, and the envelope circumference of the shell 300 can also be greater than 32mm.

[0082] In addition, the embodiment of the utility model also provides a processing method of the power primary battery, which is specifically as follows:

[0083] The metal material can be aluminum-silicon alloy. In addition, in the embodiment of the utility model, the shell 300 can be designed according to the structure of the lithium primary battery 903665. Then, red copper can be selected as the material of the pole 703, the red copper is processed into the pole 703, and a threaded groove is arranged on the pole 703. Then, the insulator 702 can be selected, the insulator 702 is placed in the through hole on the shell 300, is cooled and solidified at high temperature, and the thermistor assembly 800 and the current collector plate 704 of the pole 703 are connected by ultrasonic welding process. Then, 91 parts of manganese dioxide and carbon fluoride composite active material, 7 parts of multi-element composite conductive agent and 2 parts of water-based binder are weighed, positive electrode slurry is prepared according to the pulp preparation process, the positive electrode slurry is coated on the positive electrode current collector, the positive electrode current collector can be a 304 stainless steel plate, then drying, rolling, striping are carried out, and the multi-tab positive electrode sheet 600 is prepared. Then, Li-1 lithium belt is used as the negative electrode material, and 10 mu m thick microporous copper foil is used as the negative electrode current collector, and the lithium copper composite belt is prepared by rolling and kneading, and the multi-tab negative electrode sheet 500 is prepared by striping. Then, the diaphragm coated with boehmite is selected, the negative electrode sheet 500 is folded along the non-tab side edge as the folding line, the diaphragm is folded to cover the negative electrode sheet 500, and the diaphragm exceeds the edge of the sheet by 2 mm, then the diaphragm is fused and adhered by heating and pressing on the part exceeding the edge of the sheet, and the covering of the negative electrode sheet 500 is completed. Then, the positive electrode sheet 600 and the negative electrode sheet 500 covered with the diaphragm are placed in the winding machine, and the battery core package is prepared. Then, the positive electrode sheet 600 is placed on the bottom cover plate 100 of the shell 300, the connection between the positive electrode tab 601 and the bottom cover plate 100 is completed by the ultrasonic welding machine, the bottom cover plate 100 is pushed, and the battery core package is placed in the shell 300. Then, the sheet is placed on one side of the thermistor assembly 800, and the connection between the negative electrode tab 501 and the thermistor assembly 800 is completed by the ultrasonic welding machine. Then, the cover group 700 and the pole 703 are respectively pressed into the shell 300, and the laser welding machine is used to connect the cover group 700, the bottom cover plate 100 and the shell 300 into one body. Finally, the vacuum liquid injection system is applied, the power primary battery is injected for the first time through the liquid injection hole 102 on the bottom cover plate 100, the liquid injection hole 102 is sealed by the silicon rubber pre-plugging nail, the waterless and anaerobic glove box is entered, and after being placed for 4 hours, the silicon rubber pre-plugging nail is removed, the vacuum liquid injection system is applied, the battery is injected for the second time through the liquid injection hole 102, and the hole plugging piece 200 is connected to the bottom cover plate 100, and the hole plugging piece 200 seals the liquid injection hole 102, and the power primary battery is formed.

[0084] In addition, in the embodiment of the utility model, the power primary battery can be naturally placed for 1 day, and after the liquid leakage detection, the discharge curve is obtained by discharging by using the battery test system. Figure 5As shown, from the discharge curve, the curve is smooth, the temperature rise of the pole 703 is 10±1℃, so that the power primary battery provided by the embodiment of the utility model has good performance.

[0085] In the utility model embodiment, since the positive pole piece 600 adopts high-quality specific energy active substance, the weight of the battery under the same capacity is reduced, and the use in the field with high requirements for the weight of the battery is met. Since the pole 703 and the cover group body 701 are sealed by the glass body of the insulator 702, the cover group 700 is welded on the first opening of the shell 300, the bottom cover plate 100 is welded on the second opening of the shell 300, and the hole plugging piece 200 is pressed or welded to block the liquid injection hole, therefore, the cover group 700, the shell 300, the bottom cover plate 100 and the hole plugging piece 200 can be enclosed to form a sealed containing cavity completely isolated from the external environment, so that the positive pole piece 600, the diaphragm 400, the negative pole piece 500, the electrolyte, the thermistor assembly 800 and the insulating sheet are placed in the containing cavity, the leakage of the electrolyte or the invasion of external substances is avoided, the sudden drop of the battery performance is avoided, and the storage life, environmental adaptability and safety of the battery are improved. Since the positive pole piece 600 and the negative pole piece 500 are wrapped or alternately stacked, the diaphragm 400 is arranged between the positive pole piece 600 and the negative pole piece 500, and the diaphragm 400 is hot-melt coated on the positive pole piece 600 or the negative pole piece 500, therefore, the diaphragm 400 can isolate the positive pole piece 600 and the negative pole piece 500, the conduction of the positive pole piece 600 and the negative pole piece 500 is avoided, and the problem of internal short circuit or micro short circuit of the power primary battery is avoided. Since at least one positive pole lug 601 is formed on each positive pole piece 600, at least one negative pole lug 501 is formed on each negative pole piece 500, the negative pole piece 500 has a lithium copper composite sheet with a support structure, the pole 703 and the current collector plate 704 are one of high-conductivity metals such as purple copper and silver alloy, and an external threaded columnar body or an internal counterbore thread is processed on the upper end surface of the pole 703, therefore, while the internal charge collection and overcurrent efficiency of the battery are improved, the resistance and loss of the battery power output are reduced, and the discharge rate and overcurrent efficiency of the battery are improved. Since the negative pole lug 501 is welded and connected with the bottom cover plate 100, the positive pole lug 601 is welded and connected with the thermistor assembly 800, and the thermistor assembly 800 is welded and connected with the current collector plate 704, therefore, the thermistor assembly 800 can perform overheat protection in the power primary battery, and the safety of the power primary battery is improved. Since the electrolyte is one of solid-state electrolyte, gel-state electrolyte or wide-temperature electrolyte, and contains an additive for inhibiting the generation of gas in the corresponding electrochemical system battery, the safety of the battery storage and use is improved, and the adaptability to extreme environmental conditions is improved.That is, in the utility model, through adopting high quality specific energy active substance, the negative pole piece 500 has a supporting structure, each positive pole piece 600 and each negative pole piece 500 form at least one tab, the diaphragm 400 heat fusion cladding positive pole piece 600 or negative pole piece 500, the pole 703 and the current collecting plate 704 are high conductivity metal, through the insulator 702 sintering sealing insulation connection pole 703 and cover group body 701, select solid electrolyte, gel state electrolyte or 1 of wide temperature electrolyte, the upper end surface part of pole 703 is processed with external thread columnar body or internal counterbore thread, the heat sensitive resistance assembly 800 is arranged in the battery, and the positive pole tab 601 is connected with the current collecting plate 704 through the heat sensitive resistance assembly 800, in addition, the cover group 700, the shell 300, the bottom cover plate 100 and the hole blocking part 200 are enclosed to form a sealed containing cavity, so that the discharge rate, discharge efficiency, storage life, environmental adaptability and reliability of the battery can be improved.That is, in the utility model, the power primary battery can meet the requirements of wide temperature, light weight, high rate and reliable output power.

[0086] The utility model embodiment provides a kind of electric equipment, which includes the power primary battery in any one of the above embodiments.

[0087] It should be noted that the electric device can include, but is not limited to, unmanned aerial vehicles, underwater equipment, and the like.

[0088] Although the utility model has been described in conjunction with specific features and embodiments thereof, it is obvious that various modifications and combinations can be made thereto without departing from the spirit and scope of the utility model. Accordingly, the specification and drawings are merely illustrative of the utility model as defined in the appended claims and are considered to be open to amendment within the scope of the utility model. Obviously, those skilled in the art can make various modifications and variations to the utility model without departing from the spirit and scope of the utility model. Thus, if these modifications and variations of the utility model fall within the scope of the claims of the utility model and their equivalent technologies, the utility model also intends to include these modifications and variations.

Claims

1. A high-quality energy density primary battery, characterized in that, Includes bottom cover plate, plugging parts, housing, insulating sheet, thermistor assembly, battery cell pack, electrolyte and cover assembly; The bottom cover plate has an injection hole, and the bottom cover plate is engraved with annular or cross-shaped explosion-proof markings. A plug is provided in the injection hole to seal the injection hole. The shell is a hollow cylindrical structure with a first opening and a second opening at each end. The cover assembly covers the first opening, and the bottom cover plate covers the second opening. The cover assembly, the shell, the bottom cover plate, and the plugging component are welded together to form a receiving cavity. The insulating sheet, the thermistor assembly, the battery cell pack, and the electrolyte are located in the receiving cavity; The battery cell pack includes a negative electrode sheet, a separator, and a positive electrode sheet. The negative electrode sheet and the positive electrode sheet wrap around each other or are stacked alternately. 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 cover assembly includes a cover assembly body, an insulator, terminals, and a current collector. At least some of the terminals are located inside the battery cavity. The cover assembly body has a through hole through which the terminals pass. Some of the terminals are located outside the battery. The terminals are insulated from the wall of the through hole by an insulator, and the terminals are insulated from the inner wall of the battery cavity. Each of the negative electrode plates has at least one negative electrode tab, and each of the positive electrode plates has at least one positive electrode tab. The positive electrode tab is connected to one end of the thermistor assembly, and the other end of the thermistor assembly is connected to the current collector. The current collector is connected to the electrode post, and the negative electrode tab is connected to the inner end face of the bottom cover plate.

2. The high-quality energy density primary battery according to claim 1, characterized in that, The bottom cover plate, shell, cover assembly body and plugging parts are made of the same material, namely stainless steel, aluminum alloy and titanium alloy.

3. The high-quality energy density primary battery according to claim 1, characterized in that, The current collector has a first side and a second side facing each other, the electrode is fixed to the first side, and the thermistor assembly is connected to the second side; The electrode and the current collector are made of the same material, either copper or silver alloy. The electrode has an external or internal thread countersunk hole to facilitate the connection of an external conductive connector. The insulator is a glass body, which is sintered and solidified in the through hole of the pole and the cover body, and solidified by the insulator to the hole wall of the pole and the through hole; The glass body has weather resistance, resistance to hydrofluoric acid corrosion and electrochemical corrosion, and insulation properties, and balances the thermal stress and structural stress caused by the different coefficients of thermal expansion and contraction of the pole, the insulator, and the cover assembly due to the different materials.

4. A high-quality energy density primary battery according to claim 1, characterized in that, The insulating sheet is located between the current collector and the cover assembly body, and the two opposing surfaces of the insulating sheet abut against one side of the cover assembly body and the inner wall of the housing, respectively, so that the current collector and the pole are mutually insulated from the inner wall of the housing.

5. A high-quality energy density primary battery according to claim 1, characterized in that, The positive electrode sheet uses high-quality specific energy active material, which is mixed in the following proportions: active material: conductive agent: water-based binder at 85%~94.8%: 4%~10%: 1.2%~5%. It is coated on the positive electrode current collector and then slit or die-cut into one of the following shapes: strip, circle, quadrilateral, polygon, or irregular shape. The high-quality specific energy active material includes, but is not limited to, manganese dioxide, carbon fluoride, carbon fluoride-modified composite material, and at least one metal oxide; The adhesive is at least one of sodium polyacrylate, sodium carboxymethyl cellulose, rubber latex, acrylic homopolymer, polyvinyl alcohol, acrylonitrile copolymer, and conductive polymer adhesive.

6. A high-quality energy density primary battery according to claim 1, characterized in that, The negative electrode sheet uses lithium metal as the negative electrode active material, and the lithium metal is coated on the copper foil by rolling or electroplating; the copper foil includes microporous copper foil.

7. A high-quality energy density 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 positive electrode sheet or the negative electrode sheet is tightly wrapped by hot pressing and melting the edges. The coating layer includes at least one of boehmite, polymer, and gel electrolyte.

8. A high-quality energy density primary battery according to claim 1, characterized in that, The electrolyte is selected from one of the following: solid electrolyte, gel electrolyte, or wide-temperature electrolyte. The wide-temperature electrolyte has an ionic conductivity greater than or equal to 1.3 × 10⁻⁶. -5 It has a flow rate of s / cm and an operating temperature range of -55℃ to 125℃, and contains additives to suppress gas generation in the corresponding electrochemical battery system.

9. A high-quality energy density primary battery according to claim 1, characterized in that, The extreme envelope circumference of the galvanic cell is greater than 32 mm, and the galvanic cell is cylindrical, prismatic, polygonal, or irregular in shape.

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

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