Battery cover plate and battery

Abstract

The invention belongs to the technical field of batteries, and discloses a battery cover plate and a battery, the battery cover plate comprises a top cover body and a pole assembly, a plurality of first mounting grooves are formed in a first surface of the top cover body, and a plurality of second mounting grooves are formed in a second surface of the top cover body; each first mounting groove is internally provided with a plurality of first insertion slot holes penetrating to the second mounting groove, the pole assembly comprises an upper pole and a lower pole, the upper pole is provided with a second insertion slot hole, the lower pole is provided with an insertion bulge, the insertion bulge is inserted into the first insertion slot hole and the second insertion slot hole, and the insertion bulge is also provided with a tab through hole. The tabs sequentially penetrate through the lower poles and the top cover body through the tab through holes to be connected with the upper poles, so that the space occupied by the tabs is reduced, the energy density is improved, and the tabs of a plurality of naked battery cells are dispersedly connected to different lower poles, so that the internal resistance is reduced, the temperature rise is reduced, and the service life of the battery is prolonged. The energy supply efficiency is improved; and the service life is prolonged.

Description

Technical Field

[0001] The present invention relates to the technical field of batteries, and in particular to a battery cover and a battery. Background Art

[0002] In recent years, with the rapid development of my country's social economy, social electricity consumption has been rising year by year. In order to cope with the problems of obsolete power system, insufficient supply of electricity and peak load regulation of power grid, my country's power system has continuously expanded its production capacity and improved its efficiency. Against this background, lithium battery power storage technology has made breakthroughs and played a significant role in peak load regulation and valley filling of power grid. As a new generation of chemical energy storage equipment, lithium batteries have the advantages of long life and fast response, and have broad application space in the field of power grid energy storage in the future.

[0003] Battery covers have been widely used in energy storage battery structure settings. Usually, in order to ensure the power supply capacity of the battery, a battery usually includes multiple bare cells. The positive pole tabs of the multiple bare cells are first connected together, and the negative pole tabs of the multiple bare cells are connected together. The positive pole tab connector after the connection is completed is folded into an S shape and then connected to the positive electrode column. The negative pole tab connector after the connection is completed is folded into an S shape and then connected to the negative electrode column.

[0004] However, this connection form causes the folded tab connector to occupy a large space, which limits the volume of the bare cell and reduces the energy density. At the same time, in order to ensure that the pole can be connected to the tab connector, the pole structure is large in size, resulting in a large internal resistance and high temperature during use, resulting in low energy supply efficiency and short service life of the battery. Summary of the invention

[0005] The object of the present invention is to provide a battery cover and a battery with high space utilization, high energy density, small pole internal resistance, low temperature rise, high energy supply efficiency and long service life.

[0006] To achieve this object, the present invention adopts the following technical solutions:

[0007] In one aspect, a battery cover is provided, the battery cover is used to connect with the tab of a bare battery cell, and the battery cover comprises:

[0008] A top cover body, wherein the surface of the top cover body facing away from the bare battery cell is a first surface, and the surface of the top cover body facing the bare battery cell is a second surface, a plurality of first mounting grooves are provided on the first surface, and second mounting grooves corresponding to the plurality of first mounting grooves are provided on the second surface, and each of the first mounting grooves is provided with a plurality of first plugging slots penetrating to the second mounting groove;

[0009] A pole assembly, the pole assembly comprising an upper pole corresponding to the plurality of first mounting grooves one-to-one and a lower pole corresponding to the plurality of second mounting grooves one-to-one, the upper pole being arranged in the corresponding first mounting groove and provided with a second plugging long hole corresponding to the first plugging long hole in the corresponding first mounting groove, the lower pole being arranged in the corresponding second mounting groove, the lower pole being provided with a plugging protrusion corresponding to the first plugging long hole in the corresponding second mounting groove, the plugging protrusion being plugged into the first plugging long hole and the second plugging long hole, the plugging protrusion also being provided with a pole ear through hole for the pole ear to pass through, the pole ear through hole penetrating the lower pole.

[0010] Optionally, each of the first mounting grooves is provided with a plurality of first positioning through holes extending into the second mounting groove, the upper pole is provided with second positioning through holes corresponding one-to-one to the plurality of first positioning through holes in the corresponding first mounting grooves, the lower pole is provided with positioning posts corresponding one-to-one to the plurality of first positioning through holes in the corresponding second mounting grooves, and the positioning posts are inserted into the first positioning through holes and the second positioning through holes.

[0011] Optionally, the pole assembly further includes pole cover plates corresponding one-to-one to the plurality of upper poles, a first accommodating groove is provided on a side of the upper pole away from the top cover body, and the pole cover plates are accommodated in the corresponding first accommodating grooves.

[0012] Optionally, the battery cover plate also includes an insulating component, the insulating component includes an upper insulating member corresponding one-to-one to the first mounting groove, a second accommodating groove is provided on the upper insulating member, the upper pole is accommodated in the second accommodating groove, the upper insulating member is accommodated in the first mounting groove, and a third plug-in long hole and a third positioning through hole are also provided in the second accommodating groove, which pass through the upper insulating member, the third plug-in long hole is connected to the first plug-in long hole and the second plug-in long hole, and the third positioning through hole is connected to the first positioning through hole and the second positioning through hole.

[0013] Optionally, the insulating assembly also includes a lower insulating member corresponding one-to-one to the second mounting groove, the lower insulating member is accommodated in the second mounting groove, and a third mounting groove is also provided on the side of the lower insulating member facing away from the top cover body, the lower pole is accommodated in the third mounting groove, and a fourth plug-in long hole and a fourth positioning through hole that pass through the lower insulating member are also provided in the third mounting groove, the fourth plug-in long hole is connected to the first plug-in long hole, the second plug-in long hole and the third plug-in long hole, and the fourth positioning through hole is connected to the first positioning through hole, the second positioning through hole and the third positioning through hole.

[0014] Optionally, the battery cover further includes a sealing assembly, the sealing assembly includes a first sealing member corresponding one-to-one to the plurality of positioning posts, the first sealing member is sleeved on the outside of the positioning posts and is disposed in the first positioning through hole.

[0015] Optionally, the sealing assembly further includes a second sealing member corresponding one-to-one to the plurality of the plug-in protrusions, wherein the second sealing member is sleeved on the outside of the plug-in protrusion and disposed in the first plug-in slot.

[0016] Optionally, the battery cover plate further includes a pressure relief assembly, the pressure relief assembly includes an explosion-proof valve, a mounting through hole is provided on the top cover body, and the explosion-proof valve is accommodated in the mounting through hole.

[0017] Optionally, the insulating assembly further comprises an insulating sheet, which is disposed on the second surface of the top cover body, and is provided with a first avoidance through hole for avoiding the lower pole and a second avoidance through hole for avoiding the explosion-proof valve.

[0018] On the other hand, a battery is provided, comprising a pole group, a battery casing and a battery cover as described in any one of the above items, wherein the battery casing is a hollow shell structure with an opening, and the battery cover is covered at the opening of the battery casing and closes the battery casing to form a accommodating cavity for accommodating the pole group.

[0019] Beneficial effects of the present invention:

[0020] The present invention provides a battery cover plate, which has a first plug-in long hole extending through a second mounting groove in a first mounting groove of a top cover body, a second plug-in long hole connected to the first plug-in long hole on an upper pole, a plug-in protrusion inserted into the first plug-in long hole and the second plug-in long hole on a lower pole, and a pole ear through hole penetrating the lower pole on the plug-in protrusion, so that the pole ear can pass through the lower pole, the top cover body and the upper pole in sequence through the pole ear through the pole ear through the pole ear through the pole ear through the pole ear through the pole ear through the pole ear, and finally connect with the surface of the upper pole away from the top cover body, thereby avoiding folding the pole ear in the internal space of the battery and causing the pole ear to occupy space, so that the bare battery cell is no longer limited by the space of the folded pole ear, the volume of the bare battery cell is increased, the energy density is improved, and the pole ears of multiple bare batteries are dispersedly connected to different lower poles, thereby reducing the structural dimensions of the upper pole and the lower pole, reducing the internal resistance, reducing the temperature rise, and extending the service life.

[0021] The present invention also provides a battery, which, by applying the above-mentioned battery cover, has a small internal resistance, thereby reducing the loss during energy transmission and improving the efficiency of energy supply. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1It is an assembly diagram of the battery cover provided by the present invention;

[0023] Figure 2 is a partial structural cross-sectional view of a battery cover provided by the present invention;

[0024] Figure 3 It is a schematic diagram of the connection relationship between the top cover body and the pressure relief assembly in the battery cover provided by the present invention;

[0025] Figure 4 It is a schematic structural diagram of the top cover body of the battery cover provided by the present invention facing the side of the bare battery cell;

[0026] Figure 5 It is a schematic structural diagram of the upper pole in the battery cover provided by the present invention;

[0027] Figure 6 It is a structural schematic diagram of the lower pole in the battery cover provided by the present invention;

[0028] Figure 7 It is a structural schematic diagram of a pole cover plate marked with a “+” sign in a battery cover plate provided by the present invention;

[0029] Figure 8 It is a structural schematic diagram of a pole cover plate marked with a “-” sign in a battery cover plate provided by the present invention;

[0030] Fig. 9 It is a structural schematic diagram of the upper insulating member in the battery cover provided by the present invention;

[0031] Fig.10 It is a structural schematic diagram of the lower insulating member in the battery cover provided by the present invention;

[0032] Fig.11 It is a schematic structural diagram of the insulating sheet in the battery cover provided by the present invention.

[0033] In the figure:

[0034] 10. Top cover body; 101. First plugging slot; 102. First surface; 103. Second surface; 104. Liquid injection hole; 105. First positioning through hole; 106. First mounting groove; 107. Second mounting groove; 108. Fifth accommodating groove; 109. Seventh accommodating groove; 110. Mounting through hole;

[0035] 20, pole assembly; 201, upper pole; 2011, second plug-in slot; 2012, second positioning through hole; 2013, first accommodating groove; 202, lower pole; 2021, plug-in protrusion; 2022, pole ear through hole; 2023, positioning column; 203, pole cover;

[0036] 30. Insulation assembly; 301. Upper insulation member; 3011. Second receiving groove; 3012. Third plugging slot; 3013. Third positioning through hole; 302. Lower insulation member; 3021. Fourth plugging slot; 3022. Fourth positioning through hole; 3023. Fourth receiving groove; 3024. Sixth receiving groove; 303. Insulation sheet; 3031. First avoidance through hole; 3032. Second avoidance through hole; 3033. Third avoidance through hole;

[0037] 40. Sealing assembly; 401. First sealing member; 402. Second sealing member;

[0038] 50. Pressure relief assembly; 501. Explosion-proof valve; 502. Protective cover. DETAILED DESCRIPTION

[0039] The present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It is to be understood that the specific embodiments described herein are only used to explain the present invention, rather than to limit the present invention. It should also be noted that, for ease of description, only parts related to the present invention, rather than all structures, are shown in the accompanying drawings.

[0040] In the description of the present invention, unless otherwise clearly specified and limited, the terms "connected", "connected", and "fixed" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0041] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0042] In the description of this embodiment, the terms "upper", "lower", "right", etc., directions or positional relationships are based on the directions or positional relationships shown in the drawings, and are only for the convenience of description and simplification of operation, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as limiting the present invention. In addition, the terms "first" and "second" are only used to distinguish in the description and have no special meaning.

[0043] In recent years, with the rapid development of my country's social economy, social electricity consumption has been rising year by year. In order to cope with the problems of obsolete power system, insufficient supply of electricity and peak load regulation of power grid, my country's power system has continuously expanded its production capacity and improved its efficiency. Against this background, lithium battery power storage technology has made breakthroughs and played a significant role in peak load regulation and valley filling of power grid. As a new generation of chemical energy storage equipment, lithium batteries have the advantages of long life and fast response, and have broad application space in the field of power grid energy storage in the future.

[0044] Battery covers have been widely used in energy storage battery structure settings. Usually, in order to ensure the power supply capacity of the battery, a battery usually includes multiple bare cells. The positive pole tabs of the multiple bare cells are first connected together, and the negative pole tabs of the multiple bare cells are connected together. The positive pole tab connector after the connection is completed is folded into an S shape and then connected to the positive electrode column. The negative pole tab connector after the connection is completed is folded into an S shape and then connected to the negative electrode column.

[0045] However, this connection form causes the folded tab connector to occupy a large space, which limits the volume of the bare cell and reduces the energy density. At the same time, in order to ensure that the pole can be connected to the tab connector, the pole structure is large in size, resulting in a large internal resistance and high temperature during use, resulting in low energy supply efficiency and short service life of the battery.

[0046] Therefore, in order to reduce the space occupied by the pole tabs, improve energy density, and reduce the structural dimensions of the poles, reduce internal resistance and temperature rise, improve the energy supply efficiency of the battery, and extend its service life, this embodiment provides a battery cover, which is used to connect to the pole tabs of the bare battery cell.

[0047] like Figures 1 to 11As shown, the battery cover includes a top cover body 10 and a plurality of pole assemblies 20, the surface of the top cover body 10 away from the bare battery cell is a first surface 102, the surface of the top cover body 10 facing the bare battery cell is a second surface 103, a plurality of first mounting grooves 106 are provided on the first surface 102, and a second mounting groove 107 corresponding to the plurality of first mounting grooves 106 is provided on the second surface 103, each of the first mounting grooves 106 is provided with a plurality of first plug-in long holes 101 penetrating to the second mounting grooves 107, and the pole assembly 20 includes an upper pole 201 corresponding to the plurality of first mounting grooves 106 and a plurality of second mounting grooves 107 corresponding to each other. The corresponding lower pole 202, the upper pole 201 is arranged in the corresponding first mounting groove 106, and is provided with a second plug-in long hole 2011 corresponding to the first plug-in long hole 101 in the corresponding first mounting groove 106, the lower pole 202 is arranged in the corresponding second mounting groove 107, and the lower pole 202 is provided with a plug-in protrusion 2021 corresponding to the first plug-in long hole 101 in the corresponding second mounting groove 107, the plug-in protrusion 2021 is inserted in the first plug-in long hole 101 and the second plug-in long hole 2011, and the plug-in protrusion 2021 is also provided with a pole ear through hole 2022 for the pole ear to pass through, and the pole ear through hole 2022 runs through the lower pole 202.

[0048] The battery cover plate is provided with a first plug-in slot 101 penetrating into a second plug-in slot 107 in the first mounting slot 106 of the top cover body 10, a second plug-in slot 2011 communicating with the first plug-in slot 101 is provided on the upper pole 201, a plug-in protrusion 2021 inserted into the first plug-in slot 101 and the second plug-in slot 2011 is provided on the lower pole 202, and a pole ear through hole 2022 penetrating the lower pole 202 is provided on the plug-in protrusion 2021, so that the pole ear can pass through the pole ear through hole 2022 in sequence through the lower pole The column 202, the top cover body 10 and the upper pole 201 are finally connected to the surface of the upper pole 201 away from the top cover body 10, thereby avoiding the occupation of space by the pole ears due to folding the pole ears in the internal space of the battery, so that the bare battery cell is no longer restricted by the space of the folded pole ears, the volume of the bare battery cell is increased, and the energy density is improved. In addition, by dispersing and connecting the pole ears of multiple bare batteries on different lower poles 202, the structural dimensions of the upper pole 201 and the lower pole 202 are reduced, the internal resistance is reduced, the temperature rise is reduced, and the service life is extended.

[0049] The battery cover can be used in a variety of different types of batteries, such as blade batteries and square shell batteries. In the present embodiment, the battery cover is used in square shell batteries. The number of bare cells connected to the battery cover can be freely set according to demand. In the present embodiment, the battery cover is used to connect four bare cells. Two second plug-in long holes 2011 are provided on each upper pole 201, and two plug-in protrusions 2021 are provided on each lower pole 202. The corresponding top cover body 10 is provided with four first mounting grooves 106 and four second mounting grooves 107. Each first mounting groove 106 is provided with two first plug-in long holes 101 that penetrate to the second mounting groove 107. In addition, in order to ensure the smooth injection of electrolyte, in the present embodiment, a liquid injection hole 104 that penetrates the top cover body 10 is also provided on the top cover body 10.

[0050] Alternatively, if Figure 3 , Figure 5 , Figure 7 As shown, each first mounting groove 106 is provided with a plurality of first positioning through holes 105 that penetrate into the second mounting groove 107, the upper pole 201 is provided with second positioning through holes 2012 that correspond one-to-one to the plurality of first positioning through holes 105 in the corresponding first mounting groove 106, and the lower pole 202 is provided with positioning posts 2023 that correspond one-to-one to the plurality of first positioning through holes 105 in the corresponding second mounting groove 107, and the positioning posts 2023 are inserted into the first positioning through holes 105 and the second positioning through holes 2012. By arranging a plurality of positioning posts 2023 on the lower pole 202, and opening a first positioning through hole 105 and a second positioning through hole 2012 corresponding to the plurality of positioning posts 2023 on the top cover body 10 and the upper pole 201, the lower pole 202 can be positioned by plugging the positioning posts 2023 into the first positioning through hole 105 and the second positioning through hole 2012 during assembly, and the positioning posts 2023 can also play a limiting function to avoid relative displacement between the assembled top cover body 10, the upper pole 201 and the lower pole 202.

[0051] In this embodiment, a plurality of positioning columns 2023 are distributed around each plug-in protrusion 2021 of the lower pole 202, so as to ensure the accuracy of the position of the plug-in protrusion 2021 and the first plug-in long hole 101 and the second plug-in long hole 2011 during plugging. The number of positioning columns 2023 around each plug-in protrusion 2021 can be freely set according to needs. In this embodiment, eight positioning columns 2023 are provided around each plug-in protrusion 2021, of which three positioning columns 2023 are shared by two plug-in protrusions 2021.

[0052] Alternatively, if Figure 2 , Figure 5 , Figure 7 , Figure 8 As shown, the pole assembly 20 also includes a pole cover plate 203 corresponding to the upper pole 201, and a first accommodating groove 2013 is provided on the side of the upper pole 201 away from the top cover body 10, and the pole cover plate 203 is accommodated in the corresponding first accommodating groove 2013. By providing the first accommodating groove 2013 on the side of the upper pole 201 away from the top cover body 10, and accommodating the pole cover plate 203 in the first accommodating groove 2013, the pole cover plate 203 can close the first accommodating groove 2013, and protect the pole ear that passes through the upper pole 201 and is connected to the surface of the upper pole 201 away from the top cover body 10, so as to avoid the pole ear being exposed to the external environment and accidentally damaged. In this embodiment, a "+" mark or a "-" mark can be set on the pole cover plate 203 according to the polarity of the pole ear, so as to facilitate the distinction.

[0053] Alternatively, if Figure 2 , Figure 5 , Fig. 9 As shown, the battery cover also includes an insulating component 30, which includes an upper insulating member 301 corresponding to the first mounting groove 106. A second accommodating groove 3011 is provided on the upper insulating member 301, and the upper pole 201 is accommodated in the second accommodating groove 3011. The upper insulating member 301 is accommodated in the first mounting groove 106. A third plug-in long hole 3012 and a third positioning through hole 3013 that pass through the upper insulating member 301 are also provided in the second accommodating groove 3011. The third plug-in long hole 3012 is connected to the first plug-in long hole 101 and the second plug-in long hole 2011, and the third positioning through hole 3013 is connected to the first positioning through hole 105 and the second positioning through hole 2012.

[0054] By providing a second receiving groove 3011 for accommodating the upper pole 201 on the upper insulating member 301, the upper insulating member 301 is located between the upper pole 201 and the top cover body 10 after assembly, thereby insulating the upper pole 201 and preventing the upper pole 201 from contacting the top cover body 10 and causing a short circuit, and providing a third plugging long hole 3012 communicating with the first plugging long hole 101 and the second plugging long hole 2011 and a third positioning through hole 3013 communicating with the first positioning through hole 105 and the second positioning through hole 2012 on the upper insulating member 301, thereby ensuring that the plugging protrusion 2021 and the positioning column 2023 on the lower pole 202 can smoothly pass through the upper insulating member 301. In this embodiment, the material of the upper insulating member 301 can be a plastic material such as polypropylene or polyethylene, thereby ensuring its insulation.

[0055] Alternatively, if Figure 2 , Figure 6 , Fig.10As shown, the insulating assembly 30 also includes a lower insulating member 302 corresponding one-to-one to the second mounting groove 107, and the lower insulating member 302 is accommodated in the second mounting groove 107. A third accommodating groove is also provided on the side of the lower insulating member 302 facing away from the top cover body 10, and the lower pole 202 is accommodated in the third accommodating groove. A fourth plug-in long hole 3021 and a fourth positioning through hole 3022 that pass through the lower insulating member 302 are also provided in the third accommodating groove. The fourth plug-in long hole 3021 is connected to the first plug-in long hole 101, the second plug-in long hole 2011 and the third plug-in long hole 3012, and the fourth positioning through hole 3022 is connected to the first positioning through hole 105, the second positioning through hole 2012 and the third positioning through hole 3013.

[0056] By providing a third receiving groove for accommodating the lower pole 202 on the lower insulating member 302, the lower insulating member 302 is located between the lower pole 202 and the top cover body 10 after assembly, thereby insulating the lower pole 202 and preventing the lower pole 202 from contacting the top cover body 10 and causing a short circuit, and providing a fourth plugging long hole 3021 connected to the first plugging long hole 101, the second plugging long hole 2011 and the third plugging long hole 3012 and a fourth positioning through hole 3022 connected to the first positioning through hole 105, the second positioning through hole 2012 and the third positioning through hole 3013 on the lower insulating member 302, thereby ensuring that the plugging protrusion 2021 and the positioning column 2023 on the lower pole 202 can smoothly pass through the lower insulating member 302. In this embodiment, the material of the lower insulating member 302 can be a plastic material such as polypropylene or polyethylene, thereby ensuring its insulation.

[0057] Alternatively, if Figure 2 , Figure 5 , Figure 6 , Fig.10 As shown, the battery cover also includes a sealing component 40, and the sealing component 40 includes a first sealing member 401 corresponding to a plurality of positioning posts 2023 one by one, and the first sealing member 401 is sleeved on the outside of the positioning posts 2023 and is arranged in the first positioning through hole 105. By sleeved the first sealing member 401 on the outside of the positioning posts 2023 and making the first sealing member 401 located in the first positioning through hole 105, on the one hand, the first sealing member 401 is used to fill the gap between the first positioning through hole 105 and the positioning posts 2023 to prevent leakage of the electrolyte, and on the other hand, it plays an insulating role to prevent the hole wall of the first positioning through hole 105 from directly contacting the positioning posts 2023, resulting in a short circuit. In this embodiment, the lower insulating member 302 is also provided with a fourth accommodating groove 3023 for accommodating the first sealing member 401 on the side facing the top cover body 10, and the top cover body 10 is also provided with a fifth accommodating groove 108 arranged opposite to the fourth accommodating groove 3023, so as to limit and fix the first sealing member 401. The first sealing member 401 is a sealing ring made of fluorine-based rubber material.

[0058] Alternatively, if Figure 2 , Figure 5 , Figure 6 , Fig.10 As shown, the sealing assembly 40 further includes a second sealing member 402 corresponding to the plurality of plug-in protrusions 2021 one by one, and the second sealing member 402 is sleeved on the outside of the plug-in protrusions 2021 and is arranged in the first plug-in slot 101. By sleeved the second sealing member 402 on the outside of the plug-in protrusions 2021 and making the second sealing member 402 located in the first plug-in slot 101, the second sealing member 402 is used to fill the gap between the first plug-in slot 101 and the plug-in protrusions 2021 to prevent leakage of electrolyte, and on the other hand, it plays an insulating role to prevent the hole wall of the first plug-in slot 101 from directly contacting the plug-in protrusions 2021, resulting in a short circuit. In this embodiment, the lower insulating member 302 is further provided with a sixth receiving groove 3024 for accommodating the second sealing member 402 on one side facing the top cover body 10, and the top cover body 10 is further provided with a seventh receiving groove 109 corresponding to the sixth mounting groove 3024, thereby limiting and fixing the second sealing member 402. The second sealing member 402 is a sealing ring made of fluorine-like rubber material.

[0059] Alternatively, if Figure 3 As shown, the battery cover also includes a pressure relief component 50, and the pressure relief component 50 includes an explosion-proof valve 501. The top cover body 10 is provided with a mounting through hole 110, and the explosion-proof valve 501 is accommodated in the mounting through hole 110. By providing the mounting through hole 110 on the top cover body 10 and arranging the explosion-proof valve 501 in the mounting through hole 110, after the battery is used for a long time, the high-temperature and high-pressure gas inside the battery can be discharged into the external environment by breaking through the explosion-proof valve 501, thereby achieving the purpose of pressure relief protection. In this embodiment, the explosion-proof valve 501 is connected to the mounting through hole 110 by laser welding.

[0060] Alternatively, if Figure 3 As shown, the pressure relief assembly 50 also includes a protective cover plate 502, which is disposed on the first surface 102 of the top cover body 10 and is used to close the installation through hole 110. By arranging the protective cover plate 502 that closes the installation through hole 110 on the first surface 102 of the top cover body 10, the explosion-proof valve 501 is protected to prevent the explosion-proof valve 501 from being exposed to the external environment and accidentally damaged. In this embodiment, the protective cover plate 502 is made of PET material.

[0061] Alternatively, if Figure 2 , Fig.11As shown, each insulating assembly 30 also includes an insulating sheet 303, which is arranged on the second surface 103 of the top cover body 10, and the insulating sheet 303 is also provided with a first avoidance through hole 3031 for avoiding the lower pole 202 and a second avoidance through hole 3032 for avoiding the explosion-proof valve 501. By attaching the insulating sheet 303 to the second surface 103 of the top cover body 10, the pole ear is prevented from directly contacting the second surface 103 of the top cover body 10, thereby preventing a short circuit and ensuring the insulation of the battery cover. In this embodiment, the insulating sheet 303 is connected to the second surface 103 of the top cover body 10 by gluing, wherein the insulating sheet 303 can be made of plastic materials such as polypropylene or polyethylene. Among them, since the top cover body 10 is also provided with an injection hole 104 for injecting electrolyte, in order to smoothly inject the electrolyte into the battery, the insulating sheet 303 is also provided with a third avoidance through hole 3033 connected to the injection hole 104.

[0062] In this embodiment, a battery is also provided, which includes an electrode group, a battery shell and the above-mentioned battery cover plate, the battery shell is a hollow shell structure with an opening, and the battery cover plate is arranged at the opening of the battery shell and closes the battery shell to form a receiving cavity for accommodating the electrode group. By applying the above-mentioned battery cover plate, the battery has a small internal resistance, thereby reducing the loss during energy transmission and improving the efficiency of energy supply.

[0063] Obviously, the above embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. For those skilled in the art, various obvious changes, readjustments and substitutions can be made without departing from the protection scope of the present invention. It is not necessary and impossible to list all the embodiments here. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the claims of the present invention.

Claims

1. A battery cover, which is used to connect to the tabs of a bare battery cell, characterized in that: The battery cover comprises: A top cover body (10), wherein the surface of the top cover body (10) facing away from the bare battery cell is a first surface (102), and the surface of the top cover body (10) facing the bare battery cell is a second surface (103), the first surface (102) is provided with a plurality of first mounting grooves (106), the second surface (103) is provided with second mounting grooves (107) corresponding one-to-one to the plurality of first mounting grooves (106), and each of the first mounting grooves (106) is provided with a plurality of first long plug-in holes (101) extending through the second mounting grooves (107); A pole assembly (20), the pole assembly (20) comprising an upper pole (201) corresponding to a plurality of the first mounting grooves (106) one by one and a lower pole (202) corresponding to a plurality of the second mounting grooves (107) one by one, the upper pole (201) being arranged in the corresponding first mounting groove (106) and having a second long plugging hole (2011) corresponding to the first long plugging hole (101) in the corresponding first mounting groove (106), the lower pole (202) being arranged in the corresponding In the second mounting groove (107), the lower pole (202) is provided with a plug-in protrusion (2021) corresponding to the first plug-in long hole (101) in the second mounting groove (107), and the plug-in protrusion (2021) is inserted into the first plug-in long hole (101) and the second plug-in long hole (2011). The plug-in protrusion (2021) is also provided with a pole ear through hole (2022) for the pole ear to pass through, and the pole ear through hole (2022) passes through the lower pole (202).

2. The battery cover according to claim 1, characterized in that: Each of the first mounting grooves (106) is provided with a plurality of first positioning through holes (105) extending into the second mounting groove (107); the upper pole (201) is provided with second positioning through holes (2012) corresponding one-to-one to the plurality of first positioning through holes (105) in the first mounting grooves (106); the lower pole (202) is provided with positioning posts (2023) corresponding one-to-one to the plurality of first positioning through holes (105) in the second mounting grooves (107); the positioning posts (2023) are inserted into the first positioning through holes (105) and the second positioning through holes (2012).

3. The battery cover according to claim 1, characterized in that: The pole assembly (20) further comprises pole cover plates (203) corresponding one-to-one to the plurality of upper poles (201); a first accommodating groove (2013) is provided on a side of the upper pole (201) facing away from the top cover body (10); and the pole cover plates (203) are accommodated in the corresponding first accommodating grooves (2013).

4. The battery cover according to claim 2, characterized in that: The battery cover plate also includes an insulating component (30), the insulating component (30) includes an upper insulating member (301) corresponding to the first mounting groove (106), a second accommodating groove (3011) is provided on the upper insulating member (301), the upper pole (201) is accommodated in the second accommodating groove (3011), the upper insulating member (301) is accommodated in the first mounting groove (106), a third plugging long hole (3012) and a third positioning through hole (3013) penetrating the upper insulating member (301) are also provided in the second accommodating groove (3011), the third plugging long hole (3012) is connected to the first plugging long hole (101) and the second plugging long hole (2011), and the third positioning through hole (3013) is connected to the first positioning through hole (105) and the second positioning through hole (2012).

5. The battery cover according to claim 4, characterized in that: The insulating component (30) further comprises a lower insulating member (302) corresponding one-to-one to the second mounting groove (107), the lower insulating member (302) being accommodated in the second mounting groove (107), a third accommodating groove being further provided on the side of the lower insulating member (302) facing away from the top cover body (10), the lower pole (202) being accommodated in the third accommodating groove, a fourth plugging long hole (3021) and a fourth positioning through hole (3022) penetrating the lower insulating member (302) being further provided in the third accommodating groove, the fourth plugging long hole (3021) being connected to the first plugging long hole (101), the second plugging long hole (2011) and the third plugging long hole (3012), and the fourth positioning through hole (3022) being connected to the first positioning through hole (105), the second positioning through hole (2012) and the third positioning through hole (3013).

6. The battery cover according to claim 2, characterized in that: The battery cover plate also includes a sealing assembly (40), wherein the sealing assembly (40) includes a first sealing member (401) corresponding one-to-one to the plurality of positioning posts (2023), wherein the first sealing member (401) is sleeved on the outside of the positioning posts (2023) and is disposed in the first positioning through hole (105).

7. The battery cover according to claim 6, characterized in that: The sealing assembly (40) further comprises a second sealing member (402) corresponding one-to-one to the plurality of the plug-in protrusions (2021); the second sealing member (402) is sleeved on the outside of the plug-in protrusions (2021) and is arranged in the first plug-in slot (101).

8. The battery cover according to claim 4, characterized in that: The battery cover plate further comprises a pressure relief assembly (50), the pressure relief assembly (50) comprises an explosion-proof valve (501), a mounting through hole (110) is provided on the top cover body (10), and the explosion-proof valve (501) is accommodated in the mounting through hole (110).

9. The battery cover according to claim 8, characterized in that: The insulating assembly (30) further comprises an insulating sheet (303), wherein the insulating sheet (303) is arranged on the second surface (103) of the top cover body (10), and the insulating sheet (303) is also provided with a first avoidance through hole (3031) for avoiding the lower pole (202) and a second avoidance through hole (3032) for avoiding the explosion-proof valve (501).

10. A battery, characterized in that The battery comprises a pole group, a battery casing and a battery cover as described in any one of claims 1 to 9, wherein the battery casing is a hollow shell structure with an opening, and the battery cover is arranged on the opening of the battery casing and closes the battery casing to form a receiving cavity for accommodating the pole group.

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