Battery and electric device

Abstract

The utility model relates to the technical field of battery protection, in particular to a battery and a power utilization device.The battery comprises a shell, a first insulating cover, a second insulating cover, a battery cell and a pole, the shell is provided with a first containing cavity, and the first insulating cover and the second insulating cover are both located in the first containing cavity. The second insulating cover is provided with a second accommodating cavity; and the battery cell is positioned in the second accommodating cavity. And the first insulating cover covers the opening of the second accommodating cavity and is positioned between the battery cell and the pole. The first insulating cover is provided with a first through hole, and one part of the battery cell penetrates through the first through hole from the second accommodating cavity and is connected with the pole. And the thickness of the first insulating cover is greater than that of the second insulating cover. The safety performance of the battery can be improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of battery protection, in particular to a battery and a power consumption device. BACKGROUND

[0002] The battery is a power supply component, which provides power for a module to be powered by forming an electrical connection with the module.

[0003] The battery includes a shell and a battery cell, the battery cell is located in the shell and is protected by the shell, and the battery cell stores electrical energy and can directly or indirectly contact the module to be powered to achieve power supply.

[0004] In the related art, the battery cell is prone to short circuit when working, and the shell is charged, resulting in reduced safety performance. UTILITY MODEL CONTENT

[0005] In view of this, the present application provides a battery and a power consumption device to improve the safety performance thereof.

[0006] Specifically, the technical scheme includes the following:

[0007] The first aspect of the present application provides a battery, which includes a shell, a first insulating cover, a second insulating cover, a battery cell and a pole, the shell has a first accommodating cavity, wherein,

[0008] The first insulating cover and the second insulating cover are both located in the first accommodating cavity.

[0009] The second insulating cover has a second accommodating cavity, and the battery cell is located in the second accommodating cavity.

[0010] The first insulating cover covers the opening of the second accommodating cavity and is located between the battery cell and the pole.

[0011] The first insulating cover has a first through hole, and a part of the battery cell passes through the first through hole from the second accommodating cavity to connect with the pole.

[0012] The thickness of the first insulating cover is greater than the thickness of the second insulating cover.

[0013] Optionally, the ratio of the thickness of the first insulating cover to the thickness of the second insulating cover is in the range of 2 to 5.

[0014] Optionally, the first insulating cover has an extension part, the extension part is located at the edge of the first insulating cover, extends to the second insulating cover and is connected with the second insulating cover.

[0015] Optionally, the shell comprises a top plate, the pole column is mounted on the top plate and connected with the battery cell, the battery comprises an insulation part, the top plate has a second through hole, the pole column is located in the second through hole, and the insulation part connects the pole column and a side wall of the second through hole.

[0016] Optionally, the shell comprises a first sub-shell and a second sub-shell, the first sub-shell has a first sub-cavity, the second sub-shell has a second sub-cavity, an opening of the first sub-cavity covers an opening of the second sub-cavity and communicates with the second sub-cavity to form the first containing cavity.

[0017] Optionally, the battery comprises an explosion-proof assembly, the pole column is connected with the first sub-shell, the explosion-proof assembly is connected with the second sub-shell, and the explosion-proof assembly and the pole column are located on opposite sides of the first containing cavity, respectively.

[0018] Optionally, the battery comprises a separator, the separator divides the second containing cavity into a third sub-cavity and a fourth sub-cavity, and one battery cell is arranged in each of the third sub-cavity and the fourth sub-cavity.

[0019] Optionally, the separator comprises a first layer and a second layer arranged in a stack, a melting point of the first layer is lower than a melting point of the second layer, the melting point of the first layer ranges from 80 to 130 DEG C, and the melting point of the second layer ranges from 100 to 200 DEG C.

[0020] Optionally, the shell further has a liquid injection hole, the liquid injection hole communicates with the first containing cavity, and a ratio of a capacity of the battery cell to a number of the liquid injection hole ranges from 0.5 to 1.

[0021] Optionally, the second insulation cover comprises a side plate and a bottom plate, the side plate is in a plurality, the same side of the plurality of side plates is connected with the bottom plate and surrounds the second containing cavity with the bottom plate, and the first insulation cover is arranged opposite to the bottom plate.

[0022] Optionally, the side plate and the bottom plate are both provided with a gap between the side plate and a side wall of the first containing cavity, and the gap is filled with an adhesive.

[0023] The second aspect of the present application provides a power utilization device, which comprises the battery as described in the above technical solution.

[0024] The beneficial effects of the technical solutions provided by the embodiments of the present application at least include that the shell can accommodate the first insulating cover, the second insulating cover and the battery cell through the first accommodating cavity. The first insulating cover and the second insulating cover can separate the battery cell from the side wall of the first accommodating cavity, so as to reduce the case of the shell being electrified caused by the direct contact of the battery cell with the side wall of the first accommodating cavity. Since the first insulating cover is located between the battery cell and the pole, the thickness of the first insulating cover is greater than the thickness of the second insulating cover, so as to be beneficial to resisting the impact of the battery cell on the wall surface of the accommodating cavity, and the risk of the first insulating cover being damaged to cause the short circuit of the battery cell can be reduced. In addition, the thicknesses of the first insulating cover and the second insulating cover are improved according to the working conditions of the two, which is beneficial to reducing the production cost of the battery.

[0025] In summary, by separating the battery cell from the side wall of the first accommodating cavity and improving the resistance to the impact of the battery cell, the short circuit and the electrification of the shell of the battery of the present application can be reduced during the working, so as to be beneficial to improving the safety performance. BRIEF DESCRIPTION OF DRAWINGS

[0026] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed in the embodiment description will be briefly introduced. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative labor.

[0027] Figure 1 A cross-sectional view of a battery provided by the embodiments of the present application is shown in the figure.

[0028] Figure 2 A cross-sectional view of a part of the structure of a battery provided by the embodiments of the present application is shown in the figure.

[0029] Figure 3 Another cross-sectional view of a battery provided by the embodiments of the present application is shown in the figure.

[0030] The reference signs in the figure respectively represent:

[0031] 1, shell; 100, first accommodating cavity; 101, first through hole; 102, second through hole; 103, liquid injection hole; 11, top plate; 111, first sub-shell; 11101, first sub-cavity; 112, second sub-shell; 11201, second sub-cavity;

[0032] 2, first insulating cover; 21, extension;

[0033] 3, second insulating cover; 301, second accommodating cavity; 3011, third sub-cavity; 3012, fourth sub-cavity; 302, gap; 31, side plate; 32, bottom plate;

[0034] 4, battery cell; 41, tab;

[0035] 5. pole;

[0036] 6. insulation part;

[0037] 7. explosion-proof assembly;

[0038] 8. partition; 81. first layer; 82. second layer.

[0039] The specific embodiments of the present application have been shown and described in the above drawings, and will be described in more detail hereinafter. These drawings and detailed description are not intended to limit the scope of the present application concept in any way, but to illustrate the present application concept to those skilled in the art by referring to specific embodiments. DETAILED DESCRIPTION

[0040] The technical solutions in the embodiments of the present application will be described clearly and completely below in combination with the drawings in the embodiments of the present application. Obviously, the described embodiments are only some of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without any creative work fall within the scope of protection of the present application.

[0041] The positional nouns such as "upper", "lower", "lateral" and the like involved in the embodiments of the present application are generally based on the relative relationship of the positions shown in the drawings, and these positional nouns are used only to more clearly describe the structure and the relationship between the structures, and are not intended to describe absolute positions. When the product is placed in different attitudes, the positions may change, for example, "upper" and "lower" may be interchanged. Figure 1

[0042] Unless otherwise defined, all the technical terms used in the embodiments of the present application have the same meanings as commonly understood by those skilled in the art.

[0043] In order to make the technical solutions and advantages of the present application clearer, the embodiments of the present application will be further described in detail below in combination with the drawings.

[0044] The first aspect of the present application provides a battery, such as Figure 1 and Figure 2 As shown in the drawings, the battery comprises a shell 1, a first insulation cover 2, a second insulation cover 3, an electric core 4 and a pole 5, the shell 1 has a first accommodating cavity 100, wherein,

[0045] The first insulation cover 2 and the second insulation cover 3 are both located in the first accommodating cavity 100;

[0046] The second insulation cover 3 has a second accommodating cavity 301, and the electric core 4 is located in the second accommodating cavity 301;

[0047] ​The first insulating cover 2 covers the opening of the second accommodating cavity 301 and is located between the battery cell 4 and the pole 5.

[0048] The first insulating cover 2 has a first through hole 101, and a part of the battery cell 4 passes through the first through hole 101 to be connected with the pole 5 from the second accommodating cavity 301.

[0049] The thickness of the first insulating cover 2 is greater than the thickness of the second insulating cover 3.

[0050] It can be understood that the shell 1 can accommodate the first insulating cover 2, the second insulating cover 3 and the battery cell 4 through the first accommodating cavity 100. The first insulating cover 2 and the second insulating cover 3 can separate the battery cell 4 from the side wall of the first accommodating cavity 100, which can reduce the case that the battery cell 4 directly contacts with the side wall of the first accommodating cavity 100 to cause the shell 1 to be electrified. Since the first insulating cover 2 is located between the battery cell 4 and the pole 5, and the thickness of the first insulating cover 2 is greater than the thickness of the second insulating cover 3, it is beneficial to resist the impact of the battery cell 4 on the wall surface of the accommodating cavity, so as to reduce the risk that the first insulating cover 2 is damaged to cause the battery cell 4 to be short-circuited. In addition, the thickness of the first insulating cover 2 and the second insulating cover 3 is improved according to the working condition of the two, which is beneficial to reduce the production cost of the battery.

[0051] In the embodiment of the present application, the material of the first insulating cover 2 can be at least one of epoxy resin, high molecular polytetrafluoroethylene resin, aluminum oxide ceramic, polyaryletherketone, polyether ether ketone, acrylic resin, polyurethane, polyvinyl alcohol, polybutyl acrylate, polyacrylonitrile and polyvinyl pyrrolidone.

[0052] In the embodiment of the present application, the thickness of the first insulating cover 2 can be 0.1 mm, 0.2 mm, 0.3 mm, 0.4 mm, 0.5 mm, 0.6 mm, 0.7 mm, 0.8 mm, 0.9 mm, 1 mm, 1.1 mm, 1.2 mm, 1.3 mm, 1.4 mm, 1.5 mm, 1.6 mm, 1.7 mm, 1.8 mm, 1.9 mm or 2 mm, and can also be other values in the range of 0.1 to 2 mm.

[0053] In the embodiment of the present application, the width of the first insulating cover 2 is less than the width of the first accommodating cavity 100 by 0.5 mm, 0.6 mm, 0.7 mm, 0.8 mm, 0.9 mm or 1 mm, and can also be other values in the range of 0.5 to 1 mm.

[0054] In the embodiment of the present application, the length of the first insulating cover 2 is 1mm, 1.1mm, 1.2mm, 1.3mm, 1.4mm, 1.5mm, 1.6mm, 1.7mm, 1.8mm, 1.9mm, 2mm, 21mm, 2.2mm, 2.3mm, 2.4mm, 2.5mm, 2.6mm, 2.7mm, 2.8mm, 2.9mm or 3mm less than the length of the first accommodating cavity 100, and can also be other values in the range of 1-3mm.

[0055] In the embodiment of the present application, the material of the second insulating cover 3 can be at least one of epoxy resin, high molecular polytetrafluoroethylene resin, aluminum oxide ceramic, polyaryletherketone, polyether ether ketone, acrylic resin, polyurethane, polyvinyl alcohol, polybutyl acrylate, polyacrylonitrile, and polyvinyl pyrrolidone.

[0056] In the embodiment of the present application, the second insulating cover 3 and the wall surface of the first accommodating cavity 100 can be connected by adhesion. The distance between the second insulating cover 3 and the wall surface of the first accommodating cavity 100 is not greater than 0.5mm, so as to fill the adhesive.

[0057] In the embodiment of the present application, the thickness of the second insulating cover 3 can be 0.1mm, 0.2mm, 0.3mm, 0.4mm, 0.5mm, 0.6mm, 0.7mm, 0.8mm, 0.9mm, 1mm, 1.1mm, 1.2mm, 1.3mm, 1.4mm, 1.5mm, 1.6mm, 1.7mm, 1.8mm, 1.9mm or 2mm, and can also be other values in the range of 0.1-2mm.

[0058] In the embodiment of the present application, the width of the second insulating cover 3 is 0.5mm, 0.6mm, 0.7mm, 0.8mm, 0.9mm or 1mm less than the width of the first accommodating cavity 100, and can also be other values in the range of 0.5-1mm.

[0059] In the embodiment of the present application, the length of the second insulating cover 3 is 1mm, 1.1mm, 1.2mm, 1.3mm, 1.4mm, 1.5mm, 1.6mm, 1.7mm, 1.8mm, 1.9mm, 2mm, 21mm, 2.2mm, 2.3mm, 2.4mm, 2.5mm, 2.6mm, 2.7mm, 2.8mm, 2.9mm or 3mm less than the length of the first accommodating cavity 100, and can also be other values in the range of 1-3mm.

[0060] In the embodiments of the present application, the electric core 4 comprises a tab 41, and the tab 41 is connected with the pole 5 through the through hole. The number of the tab 41 can be two, which is used to form a loop with the device connected with the tab 41. The tab 41 can be connected with the pole 5 by laser welding or ultrasonic welding.

[0061] In the embodiments of the present application, the pole 5 can be connected with the shell 1 by laser welding or ultrasonic welding.

[0062] In the embodiments of the present application, the electric core 4 can be a winding structure, a laminated structure or a special-shaped structure.

[0063] In summary, by separating the electric core 4 from the side wall of the first accommodating cavity 100 and improving the resistance to impact of the electric core 4, the short circuit of the battery and the electrification of the shell 1 during the working of the battery are reduced, which is beneficial to improve the safety performance.

[0064] In the embodiments of the present application, the material of the shell 1 can be carbon alloy, aluminum and its alloy.

[0065] In some embodiments of the present application, the ratio of the thickness of the first insulating cover 2 to the thickness of the second insulating cover 3 is 2 to 5.

[0066] It can be understood that within the above value range, the first insulating cover 2 can resist the impact from the electric core 4, and at the same time, it is also beneficial to the protection of the electric core 4 and the side wall of the first accommodating cavity 100 by the second insulating cover 3.

[0067] In the embodiments of the present application, the ratio of the thickness of the first insulating cover 2 to the thickness of the second insulating cover 3 can be 2, 2.5, 3, 3.5, 4, 4.5 or 5, or other values in the range of 2 to 5.

[0068] In the embodiments of the present application, the thickness of the first insulating cover 2 can be 0.5 mm, 1 mm, 1.5 mm, 2 mm, 2.5 mm or 3 mm, or other values in the range of 0.5 to 3 mm.

[0069] In some embodiments of the present application, as shown in Figure 1 The first insulating cover 2 has an extension 21, which is located at the edge of the first insulating cover 2, extends to the second insulating cover 3 and is connected with the second insulating cover 3.

[0070] It can be understood that the extension 21 is beneficial to improve the structural strength of the first insulating cover 2, and it is connected with the second insulating cover 3, which can resist the impact from the second insulating cover 3, so as to reduce the risk of the first insulating cover 2 being damaged and causing the electric core 4 to be short-circuited.

[0071] In some embodiments of the present application, as shown in Figure 2 The shell 1 includes a top plate 11, the pole 5 is mounted on the top plate 11 and connected with the battery cell 4, the battery includes an insulation part 6, the shell 1 has a second through hole 102, the pole 5 is located in the second through hole 102, and the insulation part 6 connects the pole 5 and the side wall of the second through hole 102. It can be understood that the top plate 11 can form a support for the pole 5, which is conducive to forming an electrical connection between the pole 5 and the battery cell 4, and further conducive to the battery cell 4 outputting the stored electrical energy. The insulation part 6 can play an insulating role between the pole 5 and the shell 1, which is conducive to reducing the situation of the shell 1 being electrified.

[0072] In an embodiment of the present application, the insulation part 6 can be annular, the inner side thereof is connected with the insulation part 6, and the outer side thereof is connected with the side wall of the second through hole 102, so that the insulation effect between the pole 5 and the shell 1 can be achieved.

[0073] In some embodiments of the present application, as shown in Figure 3 The shell 1 includes a first sub-shell 111 and a second sub-shell 112, the first sub-shell 111 has a first sub-cavity 11101, the second sub-shell 112 has a second sub-cavity 11201, the opening of the first sub-cavity 11101 covers the opening of the second sub-cavity 11201, and the first sub-cavity 11101 is in communication with the second sub-cavity 11201 to form a first containing cavity 100.

[0074] It can be understood that the first sub-shell 111 and the second sub-shell 112 can form the first sub-cavity 11101 and the second sub-cavity 11201 by means of pit forming, and since the depth of the first containing cavity 100 is mainly affected by the depth of the first sub-cavity 11101 and the depth of the second sub-cavity 11201, such a configuration is conducive to reducing the difficulty of pit forming.

[0075] In some embodiments of the present application, as shown in Figure 3 The battery includes an explosion-proof assembly 7, the pole 5 is connected with the first sub-shell 111, the explosion-proof assembly 7 is connected with the second sub-shell 112, and the explosion-proof assembly 7 and the pole 5 are located on opposite sides of the first containing cavity 100, respectively.

[0076] It can be understood that such a configuration is conducive to the gas generated by the battery cell 4 in thermal runaway avoiding the first insulation cover 2 and the second insulation cover 3, so that the gas directly passes through the explosion-proof assembly 7 from the first containing cavity 100, thereby reducing the explosion of the battery and reducing the power of the explosion.

[0077] In an embodiment of the present application, the depth of the first sub-cavity 11101 is greater than the depth of the second sub-cavity 11201. It can be understood that the second sub-cavity 11201 with smaller depth is conducive to the explosion-proof assembly 7 releasing the heat generated by the battery cell 4 when the battery cell 4 is in thermal runaway, so as to improve the reliability of the battery.

[0078] In the embodiments of the present application, the ratio of the depth of the first sub-cavity 11101 to the depth of the second sub-cavity 11201 is in the range of 1 to 3. It can be understood that, within the above range, the first sub-shell 111 and the second sub-shell 112 are conducive to forming the first sub-cavity 11101 and the second sub-cavity 11201 by the process of impact forming, and at the same time, are conducive to releasing the heat generated by the explosion-proof assembly 7 when the battery cell 4 is in thermal runaway.

[0079] In the embodiments of the present application, the ratio of the depth of the first sub-cavity 11101 to the depth of the second sub-cavity 11201 can be 1, 1.5, 2, 2.5 or 3, or other values in the range of 1 to 3.

[0080] In some embodiments of the present application, as shown in Figure 3 The battery includes a partition plate 8, which divides the second accommodating cavity 301 into a third sub-cavity 3011 and a fourth sub-cavity 3012, and one battery cell 4 is arranged in each of the third sub-cavity 3011 and the fourth sub-cavity 3012.

[0081] It can be understood that two battery cells 4 are conducive to improving the capacity of the battery, and the partition plate 8 can reduce the direct contact between the two battery cells 4, which is conducive to the normal operation of the two battery cells 4.

[0082] In some embodiments of the present application, as shown in Figure 3 The partition plate 8 includes a first layer 81 and a second layer 82 arranged in layers, the melting point of the first layer 81 is lower than that of the second layer 82, the melting point of the first layer 81 is in the range of 80 to 130℃, and the melting point of the second layer 82 is in the range of 100 to 200℃.

[0083] It can be understood that the melting point of the first layer 81 is relatively low, which can melt when the battery cell 4 is in thermal runaway, so that the second layer 82 is damaged under the action of the pressure generated by the accumulation of gas, thereby improving the flowability of the third sub-cavity 3011 and the fourth sub-cavity 3012, to reduce the accumulation of gas and heat in the third sub-cavity 3011 or the fourth sub-cavity 3012, and the explosion of the shell 1. Within the above range, the first layer 81 is conducive to melting when the battery cell 4 is in thermal runaway, and at the same time, when the thermal runaway of the battery cell 4 becomes serious, the second layer 82 also melts, which can improve the flowability of the third sub-cavity 3011 and the fourth sub-cavity 3012.

[0084] In the embodiments of the present application, the material of the first layer 81 can be at least one of epoxy resin, high molecular polytetrafluoroethylene resin, aluminum oxide ceramic, polyaryletherketone, polyether ether ketone, acrylic resin, polyurethane, polyvinyl alcohol, polybutyl acrylate, polyacrylonitrile, and polyvinyl pyrrolidone.

[0085] In the embodiments of the present application, the material of the second layer 82 can be at least one of epoxy resin, polytetrafluoroethylene resin, alumina ceramic, polyaryletherketone, polyether ether ketone, acrylic resin, polyurethane, polyvinyl alcohol, polybutyl acrylate, polyacrylonitrile, and polyvinylpyrrolidone.

[0086] In the embodiments of the present application, the melting point of the first layer 81 can be 80℃, 85℃, 90℃, 95℃, 100℃, 105℃, 110℃, 115℃, 120℃, 125℃, or 130℃, or other values within the range of 80-130℃.

[0087] In the embodiments of the present application, the melting point of the second layer 82 can be 100℃, 105℃, 110℃, 115℃, 120℃, 125℃, 130℃, 135℃, 140℃, 145℃, 150℃, 155℃, 160℃, 165℃, 170℃, 175℃, 180℃, 185℃, 190℃, 195℃, or 200℃, or other values within the range of 100-200℃.

[0088] In the embodiments of the present application, the battery cell 4 located in the third sub-cavity 3011 is connected in parallel with the battery cell 4 located in the fourth sub-cavity 3012. The parallel connection can reduce the internal resistance at the position of the pole 5, which is conducive to improving the charging speed of the battery and reducing the temperature rise speed of the battery cell 4.

[0089] In the embodiments of the present application, the positive electrode tab 41 of the two battery cells 4 is connected, and the negative electrode tab 41 of the two battery cells 4 is connected, thereby realizing parallel connection.

[0090] In some embodiments of the present application, as shown in Figure 2 The shell 1 also has a liquid injection hole 103, which communicates with the first accommodating cavity 100. The ratio of the capacity of the battery cell 4 to the number of liquid injection holes 103 is within the range of 0.5-1.

[0091] It can be understood that the liquid injection hole 103 can be used for the electrolyte to enter the first accommodating cavity 100, which is conducive to the ion migration of the battery cell 4 during charging and discharging.

[0092] In the embodiments of the present application, a sealing ring can be arranged between the top cap and the side wall of the liquid injection hole 103 to improve the sealing effect of the liquid injection hole 103.

[0093] In the embodiments of the present application, the cross-sectional shape of the liquid injection hole 103 can be circular, prismatic, equigeometric, a combination of two or more geometric shapes, or other shapes.

[0094] In the embodiments of the present application, the shape of the top column can be conical.

[0095] In the embodiment of the present application, the top hat can be connected to the side wall of the liquid injection hole 103 by welding or the like.

[0096] In the embodiment of the present application, the top hat can be one of polyurethane elastomer, propylene-based elastomer, vinyl-based elastomer, and butylene-based elastomer.

[0097] In the embodiment of the present application, the battery further includes a top hat and a top column, the top column is located in the liquid injection hole 103, the top hat connects the side wall of the liquid injection hole 103 and the top column, and the top hat and the top column are beneficial to form a one-way valve at the liquid injection hole 103, thereby avoiding leakage of electrolyte from the liquid injection hole 103.

[0098] It can be understood that the capacity of the battery cell 4 is related to the volume of the electrolyte, and the greater the capacity of the battery cell 4, the higher the demand for electrolyte. Corresponding to the increase in the number of liquid injection holes 103, it is beneficial to improve the liquid injection efficiency and improve the soaking effect of the battery cell 4. At the same time, the plurality of liquid injection holes 103 for electrolyte injection can also reduce the situation of liquid spouting and liquid overflow of a single liquid injection hole 103, so as to be beneficial to reduce the pollution caused by the overflow of electrolyte.

[0099] In the embodiment of the present application, the number of liquid injection holes 103 can be 1, 2, 3, 4 or 5, and the liquid injection holes 103 can be arranged on the same side of the shell 1 or on different sides of the shell 1.

[0100] In some embodiments of the present application, as shown in Figure 1 The second insulating cover 3 includes a side plate 31 and a bottom plate 32, the number of the side plates 31 is multiple, the same side of the multiple side plates 31 is connected with the bottom plate 32, and the side plates 31 and the bottom plate 32 enclose a second accommodating cavity 301, and the first insulating cover 2 is arranged opposite to the bottom plate 32.

[0101] It can be understood that the second accommodating cavity 301 enclosed by the side plates 31 and the bottom plate 32 can cooperate with the first insulating cover 2 to separate the battery cell 4 from the side wall of the first accommodating cavity 100, thereby reducing the situation of electric leakage of the battery cell 4.

[0102] In the embodiment of the present application, the second accommodating cavity 301 can be formed between the side plates 31 and the bottom plate 32 by bonding, one-piece molding or the like.

[0103] In some embodiments of the present application, as shown in Figure 1 The side plates 31 and the bottom plate 32 are both provided with a gap 302 between the side plates 31 and the side wall of the first accommodating cavity 100, and the gap 302 is filled with an adhesive.

[0104] It can be understood that the gap 302 can improve the insulation between the second insulating cover 3 and the side wall of the first accommodating cavity 100, and also provides space for the adhesive between the second insulating cover 3 and the shell 1, so as to improve the stability of the second insulating cover 3.

[0105] A second aspect of the present application provides a power-using device, which comprises the battery of the above-mentioned embodiments.

[0106] It can be understood that the power-using device of the present application has the same technical effects as the above-mentioned embodiments due to the adoption of the battery of the above-mentioned embodiments, which will not be repeated here.

[0107] In the embodiments of the present application, the power-using device can be a mobile phone, a tablet computer or the like.

[0108] In the present application, the terms "first" and "second" are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance. The term "a plurality of" refers to two or more, unless otherwise explicitly limited.

[0109] Other embodiments of the present application will be apparent to those skilled in the art from consideration of the specification and practice of the application disclosed herein. The present application is intended to cover any variations, uses or adaptive changes of this application following the general principles thereof and including those expressly stated or implied herein. The specification and examples are only considered as exemplary.

[0110] It should be understood that the present application is not limited to the precise construction that has been described and shown in the accompanying drawings, and that various modifications and changes can be made by those skilled in the art without departing from the scope of the present application. The scope of the present application is only limited by the appended claims.

Claims

1. A battery, characterized by, The battery comprises a shell (1), a first insulating cover (2), a second insulating cover (3), an electric core (4) and a pole (5), wherein, The shell (1) has a first accommodating cavity (100), and the first insulating cover (2) and the second insulating cover (3) are located in the first accommodating cavity (100); The second insulating cover (3) has a second accommodating cavity (301), and the electric core (4) is located in the second accommodating cavity (301); The first insulating cover (2) covers the opening of the second accommodating cavity (301) and is located between the electric core (4) and the pole (5); The first insulating cover (2) has a first through hole (101), and a part of the electric core (4) passes through the first through hole (101) to be connected with the pole (5) from the second accommodating cavity (301); The thickness of the first insulating cover (2) is greater than the thickness of the second insulating cover (3).

2. The battery of claim 1, wherein, The ratio of the thickness of the first insulating cover (2) to the thickness of the second insulating cover (3) is 2 to 5.

3. The battery of claim 1, wherein, The first insulating cover (2) has an extension (21) located at the edge of the first insulating cover (2), extending to the second insulating cover (3) and being connected with the second insulating cover (3).

4. The battery of claim 1, wherein, The shell (1) comprises a top plate (11), the pole (5) is installed on the top plate (11) and connected with the electric core (4), the battery comprises an insulating part (6), the top plate (11) has a second through hole (102), the pole (5) is located in the second through hole (102), and the insulating part (6) connects the pole (5) and the side wall of the second through hole (102).

5. The battery of claim 1, wherein, The shell (1) comprises a first sub-shell (111) and a second sub-shell (112), the first sub-shell (111) has a first sub-cavity (11101), the second sub-shell (112) has a second sub-cavity (11201), the opening of the first sub-cavity (11101) covers the opening of the second sub-cavity (11201) and communicates with the second sub-cavity (11201) to form the first accommodating cavity (100).

6. The battery of claim 5, wherein, The battery comprises an explosion-proof assembly (7), the pole (5) is connected with the first sub-shell (111), the explosion-proof assembly (7) is connected with the second sub-shell (112), and the explosion-proof assembly (7) and the pole (5) are located on opposite sides of the first accommodating cavity (100) respectively.

7. The battery of claim 1, wherein, The battery comprises a partition plate (8), the partition plate (8) divides the second accommodating cavity (301) into a third sub-cavity (3011) and a fourth sub-cavity (3012), and one electric core (4) is arranged in each of the third sub-cavity (3011) and the fourth sub-cavity (3012).

8. The battery of claim 7, wherein, The partition plate (8) comprises a first layer (81) and a second layer (82) arranged in layers, the melting point of the first layer (81) is lower than the melting point of the second layer (82), the melting point of the first layer (81) is 80 to 130℃, and the melting point of the second layer (82) is 100 to 200℃.

9. The battery of claim 1, wherein, The shell (1) further has liquid injection holes (103) in communication with the first accommodating cavities (100), and the ratio of the capacity of the battery cell (4) to the number of the liquid injection holes (103) ranges from 0.5 to 1.

10. The battery of claim 1, wherein, The second insulating cover (3) comprises side plates (31) and a bottom plate (32), the side plates (31) are multiple in number, the same side of the multiple side plates (31) is connected with the bottom plate (32), and the bottom plate (32) and the side plates (31) enclose the second accommodating cavities (301), and the first insulating cover (2) is arranged opposite to the bottom plate (32).

11. The battery of claim 10, wherein, The side plates (31) and the bottom plate (32) are both provided with gaps (302) between the side walls of the first accommodating cavities (100), and the gaps (302) are filled with adhesives.

12. An electrical device, comprising: The electric device comprises the battery as claimed in any one of claims 1 to 11.

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