Battery, battery pack and electric equipment

Abstract

The utility model provides a battery, a battery pack and electric equipment, and belongs to the technical field of batteries, and the battery comprises a pole shank, a shell and a cover plate assembly. A cavity is formed in the shell, the shell is provided with a first end and a second end in the first direction, and the pole core is located in the cavity. The cover plate assembly comprises a first metal cover plate and a second metal cover plate, the first metal cover plate is connected with the first end of the shell, a pole insulated from the first metal cover plate is arranged on the first metal cover plate, and the first electrode of the pole core is electrically connected with the pole. And the second metal cover plate is connected with the second end of the shell. Thus, the first metal cover plate, the second metal cover plate and the shell are all provided with the polarity of the second electrode of the pole core, the pole column on the first metal cover plate is provided with the polarity of the first electrode of the pole core, a complete circuit is formed, and the charging and discharging process is achieved. And moreover, the first metal cover plate and the shell are electrified through the second metal cover plate, so that corrosion reaction possibly causing electrochemistry is reduced.

Description

TECHNICAL FIELD

[0001] Embodiments of the present application relate to the technical field of batteries, in particular to a battery, a battery pack and an electrical equipment. BACKGROUND

[0002] With the continuous progress of power battery technology and the growing market demand, the performance of batteries in new energy battery vehicles is increasingly concerned, and the energy density and safety of batteries have become important indicators for measuring battery performance.

[0003] A conventional lithium ion battery is composed of an aluminum shell, an insulating film, an insulating block, a cover plate, a pole core and the like. The battery has many and complex structural parts, which increases the manufacturing difficulty and cost. CONTENT OF THE UTILITY MODEL

[0004] Embodiments of the present application provide a battery, a battery pack and an electrical equipment. The second metal cover plate integrates the metal block, the pole column and the insulating components on the traditional cover plate. The integrated top cover plate structure greatly simplifies the assembly steps between components, reduces potential failure points caused by multiple component connections, and improves the overall reliability of the battery.

[0005] Embodiments of the present application provide the following technical solutions to solve the above technical problems:

[0006] Firstly, embodiments of the present application provide a battery, comprising:

[0007] a pole core;

[0008] a shell having a cavity inside and having a first end and a second end along a first direction, the pole core being located in the cavity;

[0009] a cover plate assembly comprising a first metal cover plate and a second metal cover plate, the first metal cover plate being connected to the first end of the shell, the first metal cover plate being provided with a pole column insulated from the first metal cover plate, a first electrode of the pole core being electrically connected to the pole column;

[0010] the second metal cover plate being connected to the second end of the shell, and a second electrode of the pole core being electrically connected to the second metal cover plate, the first electrode of the pole core and the second electrode of the pole core being opposite in polarity.

[0011] The battery provided by the embodiment of the application comprises a pole core, a shell and a cover plate assembly. The shell has a cavity and a first end and a second end in a first direction. The pole core is located in the cavity. The cover plate assembly comprises a first metal cover plate and a second metal cover plate. The first metal cover plate is connected to the first end of the shell. The first metal cover plate is provided with a pole post insulated from the first metal cover plate. The first electrode of the pole core is electrically connected to the pole post. The second metal cover plate is connected to the second end of the shell. In this way, the first metal cover plate, the second metal cover plate and the shell all have the polarity of the second electrode of the pole core. The pole post on the first metal cover plate has the polarity of the first electrode of the pole core, forming a complete circuit to realize the charging and discharging process. Moreover, the first metal cover plate and the shell are electrified through the second metal cover plate, reducing the possibility of causing electrochemical corrosion reaction.

[0012] The second metal cover plate integrates the metal block, the pole post and the insulating piece on the traditional cover plate. The integrated cover plate structure greatly simplifies the assembly steps between components, reduces potential failure points caused by the connection of multiple components, improves the overall reliability of the battery, avoids the redundant materials between components, effectively reduces the material cost, reduces the processing and assembly procedures in the production process, further reduces the manufacturing cost, significantly reduces the overall weight of the battery, and thus improves the energy efficiency and system performance of the battery. In the application scenarios sensitive to weight such as electric vehicles and energy storage systems, the energy density and cruising range are improved.

[0013] In a possible implementation, the pole core is provided with a positive electrode tab towards the first end to form the first electrode, and the pole core is provided with a negative electrode tab towards the second end to form the second electrode.

[0014] The positive electrode tab is electrically connected to the pole post, and the negative electrode tab is electrically connected to the second metal cover plate.

[0015] In a possible implementation, the first metal cover plate, the shell and the second metal cover plate are electrically connected.

[0016] In a possible implementation, the pole core is provided with a positive electrode tab towards the first end to form the first electrode, and the pole core is provided with a negative electrode tab towards the second end to form the second electrode.

[0017] The positive electrode tab is electrically connected to the pole post, and the negative electrode tab is electrically connected to the second metal cover plate.

[0018] In a possible implementation, the cover plate assembly further comprises a lead-out sheet. The lead-out sheet is located in the cavity. One end of the lead-out sheet is connected to the first electrode of the pole core, and the other end of the lead-out sheet is connected to the pole post.

[0019] In a possible implementation, the cover plate assembly further comprises a first metal block, which is arranged on a side of the first metal cover plate away from the cavity and is insulatedly connected with the first metal cover plate, and the first metal cover plate is provided with an opening, and the pole is connected with the first metal block through the opening.

[0020] In a possible implementation, the cover plate assembly further comprises a first insulating member, which is arranged on a side of the first metal cover plate away from the cavity, so as to insulate the first metal block from the first metal cover plate.

[0021] In a possible implementation, the cover plate assembly further comprises a second insulating member, which is arranged on a side of the first metal cover plate facing the cavity, and the first electrode of the pole core is electrically connected with the pole through the second insulating member.

[0022] In a possible implementation, the cover plate assembly further comprises a third insulating member, which is arranged in the opening of the first metal cover plate, so as to insulate the pole from the first metal cover plate.

[0023] In a possible implementation, the first metal cover plate is further provided with a second metal block, and the second metal block is electrically connected with the second metal cover plate through the first metal cover plate and the shell.

[0024] In a possible implementation, an explosion-proof valve is further arranged on the first metal cover plate.

[0025] Alternatively, the explosion-proof valve is arranged on the second metal cover plate.

[0026] Alternatively, the explosion-proof valve is arranged on the shell.

[0027] In a possible implementation, an injection hole is further arranged on the first metal cover plate.

[0028] Alternatively, the injection hole is arranged on the second metal cover plate.

[0029] Alternatively, the injection hole is arranged on the shell.

[0030] In a possible implementation, the cover plate assembly further comprises a second insulating member, which is arranged on a side of the first metal cover plate facing the cavity, and the second insulating member is provided with a plurality of holes, and the explosion-proof valve arranged on the first metal cover plate is connected with the cavity through the holes.

[0031] In a possible implementation, the cover plate assembly further comprises a second insulating member, which is arranged on a side of the first metal cover plate facing the cavity, and a plurality of holes are arranged on the second insulating member, and the liquid injection hole arranged on the first metal cover plate is in communication with the cavity through the holes.

[0032] In a second aspect, the embodiments of the present application provide a battery pack, comprising:

[0033] A battery pack comprising the battery described above.

[0034] In a possible implementation, the battery pack comprises a connecting member, and the battery comprises at least two batteries, and the connecting member is used for electrically connecting the at least two batteries.

[0035] The battery pack further comprises a support fixed to at least one end of the battery, and the connecting member is positioned and installed on the battery through the support.

[0036] In a possible implementation, the first metal cover plate of the battery is provided with a first metal block, the first metal block is arranged on a side of the first metal cover plate facing away from the cavity of the battery and is insulatedly connected to the first metal cover plate, the first metal block is electrically connected to a first electrode of a pole core through a pole post of the battery, and the first metal cover plate is electrically connected to a second electrode of the pole core through a shell and a second metal cover plate of the battery.

[0037] The support is fixed to the first metal block, each connecting member is welded to two adjacent batteries, one end of the connecting member is connected to the first metal block of one of the batteries, and the other end of the connecting member is connected to the first metal cover plate of the other battery, so that the two adjacent batteries are connected in series.

[0038] Alternatively, each connecting member is welded to two adjacent batteries, one end of the connecting member is connected to the first metal block of one of the batteries, and the other end of the connecting member is connected to the second metal cover plate of the other battery, so that the two adjacent batteries are connected in series.

[0039] In a possible implementation, the first metal cover plate of the battery is provided with a first metal block and a second metal block, the first metal block is arranged on a side of the first metal cover plate facing away from the cavity of the battery and is insulatedly connected to the first metal cover plate, the first metal block is electrically connected to a first electrode of a pole core through a pole post, and the second metal block arranged on the first metal cover plate is electrically connected to a second electrode of the pole core through a shell and a second metal cover plate of the battery.

[0040] The support is fixed on the first metal block and the second metal block, each connecting piece is welded with two adjacent batteries, one end of the connecting piece is connected with the first metal block of one of the batteries, and the other end of the connecting piece is connected with the second metal block of the other battery, so that two adjacent batteries are connected in series.

[0041] In a possible implementation, the application further comprises a functional plate and a sampling piece, the sampling piece is arranged at both ends of the functional plate, the functional plate is connected with the battery through the sampling piece, and the functional plate is used to collect operation information of the battery.

[0042] The sampling piece at one end of the functional plate is connected with the side of the connecting piece away from the battery, and the sampling piece at the other end of the functional plate is connected with the first metal cover plate or the second metal cover plate of the battery.

[0043] In a possible implementation, the application further comprises a protective cover, the protective cover is arranged on the side of the functional plate away from the battery, and the protective cover is used to protect the functional plate.

[0044] In a possible implementation, the application further comprises a second insulating film, the second insulating film is arranged between two adjacent batteries, so that the shells of the adjacent batteries are insulated from each other.

[0045] In a third part, the application provides a power consumption device, which comprises:

[0046] A power consumption device, and the battery pack or the battery described above, the battery pack or the battery is used to provide electric energy for the power consumption device.

[0047] In addition to the technical problems solved by the application described above, the technical features constituting the technical solutions and the beneficial effects brought by the technical features, the other technical problems solved by the battery, the battery pack and the power consumption device provided by the application, the other technical features included in the technical solutions and the beneficial effects brought by the technical features will be further described in detail in the specific embodiments. BRIEF DESCRIPTION OF DRAWINGS

[0048] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings needed to be used in the description of the embodiments of the present application or the prior art. Obviously, the drawings in the following description are only a part of the embodiments of the present application, and these drawings and the text description are not intended to limit the scope of the present application in any way, but are intended to explain the present application to those skilled in the art by reference to the specific embodiments. Other drawings can also be obtained by those skilled in the art without creative effort on the basis of these drawings.

[0049] Figure 1 The structural schematic diagram of the battery provided by the embodiment of the present application is shown in the following figure.

[0050] Figure 2 The structural schematic diagram of the first metal cover plate of the battery provided by the embodiment of the present application is shown in the following figure.

[0051] Figure 3 The structural schematic diagram of the second metal cover plate of the battery provided by the embodiment of the present application is shown in the following figure.

[0052] Figure 4 The exploded view of the battery pack provided by the embodiment of the present application is shown in the following figure.

[0053] Figure 5 The structural schematic diagram of the functional plate provided by the embodiment of the present application is shown in the following figure.

[0054] Explanation of reference signs:

[0055] 10-battery; 20-battery pack; 30-connector; 40-bracket; 50-functional plate; 60-sampling member; 70-protection cover;

[0056] 100-pole core; 110-side plate; 120-first insulating film;

[0057] 200-housing; 210-cavity;

[0058] 300-first metal cover plate; 310-pole; 320-opening; 330-second metal block;

[0059] 400-cover plate assembly; 410-lead-out sheet; 420-first metal block;

[0060] 510-first insulating member; 520-second insulating member; 530-third insulating member; 540-hole;

[0061] 600-second metal cover plate;

[0062] 700-explosion-proof valve;

[0063] 800-liquid injection hole. DETAILED DESCRIPTION

[0064] The technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part 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 a person of ordinary skill in the art without creative work fall within the protection scope of the present application.

[0065] The embodiments of the present application provide a power-using device, the power-using device comprising a power-using apparatus and a battery pack,

[0066] The battery pack is used to provide electric energy for the power-using apparatus. For example, the battery pack is used to provide electric energy for a vehicle, which can be a new energy vehicle, such as a pure electric vehicle (PEV / BEV), a range extended electric vehicle (REEV), a hybrid electric vehicle (HEV), a fuel cell electric vehicle, and the like. The vehicle can also be any vehicle with a battery.

[0067] The battery pack can comprise a plurality of batteries, which can be cylindrical batteries or square case batteries, or have a plurality of battery cells inside, in a possible implementation. The plurality of batteries can store and output electric energy through a certain connection mode and a control system, and the electric energy provided by the battery pack or the batteries can be used to meet the normal operation of the power-using apparatus. The battery can be a primary battery or a secondary battery. The primary battery is a battery that cannot be restored to its use state by charging after completing the discharging process. The secondary battery is a battery type that can continue to be used by activating the internal active material through charging means after completing the discharging process. The battery can be a lithium ion battery, a sodium ion battery, a lithium-sulfur battery, or the like. In the examples of the present application, the battery is a sodium ion battery.

[0068] The embodiments of the present application provide a battery 10, such as Figures 1 to 3As shown, the battery 10 includes a pole core 100, a shell 200, and a cover plate assembly 400. The shell 200 has a cavity 210 inside, and the shell 200 has a first end and a second end along a first direction, and the pole core 100 is located in the cavity 210. The cover plate assembly 400 includes a first metal cover plate 300 and a second metal cover plate 600, the first metal cover plate 300 is connected to the first end of the shell 200, and the first metal cover plate 300 is provided with a pole 310 insulated from the first metal cover plate 300, and the first electrode of the pole core 100 is connected to the pole 310. The second metal cover plate 600 is connected to the second end of the shell 200, and the second electrode of the pole core 100 is electrically connected to the second metal cover plate 600, so that the shell 200 and the first metal cover plate 300 are charged through the second metal cover plate 600, and the first electrode of the pole core 100 and the second electrode of the pole core 100 are opposite in polarity

[0069] The shell 200 is the outer shell of the battery 10, and the two ends of the shell 200 are connected to the first metal cover plate 300 and the second metal cover plate 600, respectively, to meet the sealing requirement of the cavity 210, so as to protect the various components inside the battery 10 from the external environment such as humidity, dust, mechanical impact, etc. In the embodiment of the present application, the shell 200 can be an aluminum shell, but is not limited to an aluminum shell, for example, a copper shell, a steel shell or other metal shell can also be selected. The shell 200 has a cavity 210 inside to accommodate the pole core 100, and the pole core 100 is composed of a positive plate, a negative plate and a separator. The positive plate and the negative plate are respectively coated with an active material capable of reversibly embedding and extracting sodium ions, and the separator is located between the positive plate and the negative plate to prevent the positive plate and the negative plate from directly contacting to cause short circuit. An electrolyte is injected into the shell 200, and the sodium ion electrolyte moves between the positive plate and the negative plate to realize the charging and discharging process.

[0070] The first metal cover plate 300 is provided with a pole 310 insulated from the first metal cover plate 300, and the pole 310 is an external connection point of the positive or negative electrode of the battery 10, one end of the pole 310 is connected to one end of the pole core 100, and the other end of the pole 310 can be connected to an external circuit to realize the charging and discharging function of the battery 10. The second metal cover plate 600 is connected to the other end of the pole core 100, and the second metal cover plate 600 is an external connection point of the negative or positive electrode of the battery 10, and the second metal cover plate 600 can be connected to an external circuit to realize the charging and discharging function of the battery 10. In this way, when the battery 10 works, the shell 200 and the first metal cover plate 300 will be charged with any one of positive or negative electricity through the second metal cover plate 600, and the pole 310 on the first metal cover plate 300 will be charged with the other one of positive or negative electricity, forming a complete circuit.

[0071] It should be noted that the first metal cover plate 300 and the pole column 310 are provided with the first insulating member 510, which can prevent short circuit. In a possible implementation, the second metal cover plate 600 is connected with the positive electrode of the pole core 100, the first metal cover plate 300 is connected with the second metal cover plate 600 through the shell 200, and the first metal cover plate 300 and the second metal cover plate 600 can both serve as the positive electrode of the battery 10; the pole column 310 on the first metal cover plate 300 is connected with the negative electrode of the pole core 100, and the pole column 310 serves as the negative electrode of the battery 10, thereby forming a complete circuit to realize the charging and discharging process. In another possible implementation, the second metal cover plate 600 is connected with the negative electrode of the pole core 100, and the pole column 310 on the first metal cover plate 300 is connected with the positive electrode of the pole core 100, thereby also forming a complete circuit, which is contrary to the above-mentioned mode, and details are not described herein.

[0072] The second metal cover plate 600 of the embodiment of the present application integrates the metal block, the pole column 310 and the insulating member on the conventional cover plate, and the integrated top cover plate structure greatly simplifies, reduces the assembly steps between components, reduces the potential failure points caused by the connection of multiple components, and improves the overall reliability of the battery 10. Redundant materials between components are avoided, the material cost is effectively reduced, the processing and assembly processes in the production process are reduced, and the manufacturing cost is further reduced. The overall weight of the battery 10 is significantly reduced, thereby improving the energy efficiency and system performance of the battery 10. In the application scenarios sensitive to weight such as electric vehicles and energy storage systems, the energy density and cruising range are improved.

[0073] It should be noted that the first metal cover plate 300 and the shell 200 are electrified through the second metal cover plate 600, and a relatively stable electric potential field is formed between the first metal cover plate 300 and the pole core 100 in the cavity 210, thereby reducing the potential difference between the shell 200 and the pole core 100 in the cavity 210 and reducing the possible electrochemical corrosion reaction. It can be understood that the first metal cover plate 300 and the second metal cover plate 600 can be made of the same metal material as the shell 200, or can be made of different metal materials, and the size, size and material can be selected according to the actual working condition, which is not limited herein.

[0074] In some embodiments of the present application, the pole core 100 is provided with a positive electrode tab towards the first end to form a first electrode, and is provided with a negative electrode tab towards the second end to form a second electrode, the positive electrode tab is connected with the pole column 310 of the first metal cover plate 300, the negative electrode tab is electrically connected with the second metal cover plate 600, and the shell 200 and the first metal cover plate 300 are both electrified with negative electricity. Alternatively, the pole core 100 is provided with a negative electrode tab towards the first end, and is provided with a positive electrode tab towards the second end, the negative electrode tab is connected with the pole column 310 of the first metal cover plate 300, the positive electrode tab is directly electrically connected with the second metal cover plate 600, and the shell 200 and the first metal cover plate 300 are both electrified with positive electricity.

[0075] In one possible implementation, the positive tab at one end of the pole core 100 is connected to the pole 310 of the first metal cover plate 300 to form a first electrode, so that the pole 310 is positively charged. The negative tab at the other end of the pole core 100 is connected to the second metal cover plate 600 to form a second electrode, so that the second metal cover plate 600 is negatively charged. It can be understood that the first metal cover plate 300 is connected to the second metal cover plate 600 through the shell 200, and the first metal cover plate 300 and the shell 200 are both negatively charged at this time.

[0076] In another possible implementation, the negative tab at one end of the pole core 100 is connected to the pole 310 of the first metal cover plate 300 to form a first electrode, so that the pole 310 is negatively charged. The positive tab at the other end of the pole core 100 is connected to the second metal cover plate 600 to form a second electrode, so that the second metal cover plate 600 is positively charged. It can be understood that the first metal cover plate 300 is connected to the second metal cover plate 600 through the shell 200, and the first metal cover plate 300 and the shell 200 are both positively charged at this time. The two different connection modes can meet different application scenarios and demand choices, which are not limited here.

[0077] In some embodiments of the present application, the pole core 100 includes a plurality of positive sheets, negative sheets, and separators. The positive sheets and the negative sheets are arranged in layers, and the positive tab is connected to the positive sheet, the negative tab is connected to the negative sheet, and the separator is located between the positive sheet and the negative sheet. The pole core 100 is composed of a plurality of pole sheets stacked together, and the outermost side of the pole core 100 is a negative sheet.

[0078] During the charging process of the battery 10, sodium ions are deintercalated from the positive electrode and intercalated into the negative electrode. If the space of the negative electrode is not enough, the space for intercalating sodium ions is insufficient, and the resistance of the sodium ions intercalating into the negative electrode will increase. This may cause part of the sodium ions to fail to intercalate into the negative electrode smoothly, but to obtain electrons on the surface of the negative electrode, thereby reducing the performance of the battery 10 and shortening the cycle life. It should be noted that the size of the negative sheet is slightly larger than that of the positive sheet, that is, the length and width edges of the negative sheet exceed those of the positive sheet, so as to wrap the positive sheet with the negative sheet, thereby ensuring the safety performance of the battery 10.

[0079] It should be noted that in the examples of the present application, the positive sheet of the pole core 100 can be sodium nickel oxide, sodium manganese oxide, sodium iron oxide, etc., and the negative sheet of the pole core 100 can be carbon-based materials such as graphite, hard carbon, soft carbon, etc., but is not limited to the above-mentioned materials. The material of the positive sheet and the negative sheet can be adjusted according to the actual working condition. The positive tab and the negative tab can be made of aluminum, but are not limited to aluminum, for example, copper or other metal materials can also be used, which have good electrical conductivity and mechanical strength, and can ensure smooth flow of current in the battery 10 and bear certain mechanical stress, which will not be described here.

[0080] As shown in some embodiments of the present application, Figure 2 The battery 10 further comprises a cover plate assembly 400, which is insulatedly connected with the first metal cover plate 300, and the pole 310 is arranged on one side of the cover plate assembly 400 facing the first metal cover plate 300. The cover plate assembly 400 comprises a lead-out sheet 410, which is arranged in the cavity 210, one end of the lead-out sheet 410 is connected with the positive tab, and the other end of the lead-out sheet 410 is connected with one end of the pole 310. Alternatively, one end of the lead-out sheet 410 is connected with the negative tab, and the other end of the lead-out sheet 410 is connected with the pole 310.

[0081] In the example of the present application, the cover plate assembly 400 is insulatedly connected with the first metal cover plate 300, which can ensure that the current of the core 100 in the shell 200 cannot be short-circuited between the cover plate assembly 400, the shell 200, the first metal cover plate 300 and the second metal cover plate 600, thereby improving the safety of the battery 10. The pole 310 is arranged on one side of the cover plate assembly 400 facing the first metal cover plate 300, and the pole 310 serves as an interface between the core 100 and the external circuit, which is conducive to the connection with the external circuit, and takes into account the convenience of connection and the compactness of the structure of the battery 10.

[0082] The lead-out sheet 410 arranged can ensure the reliability and stability of the connection between the tab at one end of the core 100 and the pole 310, so that the connection position of the core 100 can withstand the current and mechanical stress generated during the operation of the battery 10. In the example of the present application, the lead-out sheet 410 is arranged in a symmetrical manner, and a recess is arranged at the center of the lead-out sheet 410, which can be used to fix one end of the pole 310 facing the core 100. The space of the recess facing the core 100 can enhance the connection strength between the pole 310 and the lead-out sheet 410, and prevent loosening or falling off due to vibration or impact. It should be noted that the lead-out sheet 410 can have the shape shown in the figure, but is not limited to the shape shown in the figure, for example, the lead-out sheet 410 can be circular, square, etc.

[0083] The lead-out sheet 410 is arranged in the cavity 210 of the shell 200, one side of the lead-out sheet 410 can be connected with the positive tab or the negative tab of the core 100, and the other side of the lead-out sheet 410 is connected with the pole 310, thereby realizing effective connection between the inside of the battery 10 and the external circuit. The polarity of the tab connected to the side of the lead-out sheet 410 facing the core 100 is not limited here, and can be adjusted according to actual working conditions as needed.

[0084] In some embodiments of the present application, please continue to refer to Figure 2The cover plate assembly 400 comprises a first metal block 420 which is connected to the first metal cover plate 300 in an insulating manner on the side of the first metal cover plate 300 facing away from the cavity 210, and the first metal cover plate 300 is provided with an opening 320, and the pole 310 passes through the opening 320 and is connected to the first metal block 420. The first metal cover plate 300 is provided with a second metal block 330, and the second metal block 330 is connected to one of the poles 310 as a positive electrode and the other as a negative electrode.

[0085] It can be understood that the first metal block 420 and the first metal cover plate 300 are provided with a first insulating member 510, and the first metal block 420 is connected to one end of the pole 310. In a possible implementation, the pole 310 is connected to the positive electrode lug of the pole core 100, and the first metal block 420 is a positive electrode lead terminal. The negative electrode lug of the pole core 100 is connected to the second metal cover plate 600, and the first metal cover plate 300 is connected to the first metal cover plate 300 through the shell 200, and the second metal block 330 provided on the first metal cover plate 300 is negatively charged as a negative electrode lead terminal. Similarly, the first metal block 420 can be negatively charged, and the second metal block 330 can be positively charged, which will not be expanded here.

[0086] By providing the first metal block 420, the contact area between the pole 310 and the external circuit can be increased, thereby reducing the contact resistance and improving the current transmission efficiency. Moreover, the first metal block 420 and the second metal block 330 act as heat conduction media, which can effectively conduct the heat generated inside the battery 10 to the external environment, which is helpful for heat dissipation and thermal management of the battery 10. It should be noted that the first metal block 420 and the second metal block 330 are rectangular in the examples of the present application, but are not limited to rectangular shapes, and the shape, size and material thereof can be adjusted according to actual working conditions.

[0087] It can be understood that, in order to meet the installation needs of the pole 310, the first metal cover plate 300 is provided with an opening 320 through which the pole 310 passes. In the examples of the present application, the opening 320 is circular, but is not limited to a circular shape, for example, it can also be rectangular or other shapes. The size and shape of the opening 320 meet the installation requirements of the pole 310, and meet the requirements that the pole 310 can pass through smoothly and be connected to the first metal block 420 tightly. At the same time, the position and number of the opening 320 also need to be reasonably arranged according to the design requirements of the battery 10, so as to ensure the reliability and safety of the electrical connection.

[0088] In some embodiments of the present application, the cover plate assembly 400 further comprises a first insulating member 510, a second insulating member 520 and a third insulating member 530. The first insulating member 510 is arranged on the side of the first metal cover plate 300 away from the cavity 210, so as to insulate the first metal block 420 from the first metal cover plate 300. The second insulating member 520 is arranged on the side of the first metal cover plate 300 facing the cavity 210, so as to insulate the shell 200 from the first metal cover plate 300. The third insulating member 530 is arranged in the opening 320 of the first metal cover plate 300, so as to insulate the pole 310 from the first metal cover plate 300. It should be noted that the material, shape, size and dimension of the first insulating member 510, the second insulating member 520 and the third insulating member 530 can meet the installation and insulation requirements, and are not limited herein.

[0089] The first insulating member 510 is arranged between the first metal cover plate 300 and the first metal block 420, so as to avoid short circuit caused by contact between the first metal block 420 and the first metal cover plate 300. The second insulating member 520 is arranged between the first metal cover plate 300 and the shell 200, so as to avoid short circuit caused by contact between the first metal cover plate 300 and the tab at one end of the pole 310. It can be understood that when the negative tab is connected to the second metal cover plate 600, the shell 200 and the first metal cover plate 300 are both negatively charged. The positive tab is connected to the first metal block 420 through the lead-out sheet 410 and the pole 310, and is both positively charged. The second insulating member 520 can avoid short circuit caused by contact between the positively charged lead-out sheet 410 and the negatively charged first metal cover plate 300.

[0090] In some embodiments of the present application, the battery 10 further comprises a first insulating film 120. The second metal cover plate 600 is connected to the positive tab, the shell 200 and the first metal cover plate 300 are both positively charged, and the first insulating film 120 is arranged between the shell 200 and the pole core 100, so as to insulate the pole core 100 from the shell 200.

[0091] It can be understood that when the negative tab is connected to the second metal cover plate 600, the second metal cover plate 600 and the shell 200 are both negatively charged. In this case, the first insulating film 120 can not be arranged, and the negative tab on the outermost layer of the pole core 100 directly contacts the negatively charged shell 200, without causing short circuit. When the positive tab is connected to the second metal cover plate 600, the second metal cover plate 600 and the shell 200 are both positively charged. In this case, the first insulating film 120 is needed to be arranged to isolate the negative tab on the outermost layer of the pole core 100 from the positively charged shell 200, so as to avoid short circuit.

[0092] In some embodiments of the present application, the battery 10 further comprises an explosion-proof valve 700 and a liquid injection hole 800. The explosion-proof valve 700 is arranged on the first metal cover plate 300, or the explosion-proof valve 700 is arranged on the second metal cover plate 600, or the explosion-proof valve 700 is arranged on the shell 200. The liquid injection hole 800 is arranged on the first metal cover plate 300, or the liquid injection hole 800 is arranged on the second metal cover plate 600, or the liquid injection hole 800 is arranged on the shell 200.

[0093] In the examples of the present application, as shown in Figure 2 and Figure 3 , the liquid injection hole 800 is arranged on the first metal cover plate 300, and the explosion-proof valve 700 is arranged on the second metal cover plate 600. However, the arrangement of the explosion-proof valve 700 and the liquid injection hole 800 is not limited to the examples shown in the figures, and the arrangement of the explosion-proof valve 700 and the liquid injection hole 800 can meet the needs of the battery 10, and details are not described here.

[0094] In order to meet the needs of the electrolyte entering the cavity 210 of the shell 200 and reacting with the pole core 100, the liquid injection hole 800 is arranged on the outer surface of the battery 10 to communicate with the cavity 210, and the electrolyte is injected through the liquid injection hole 800 to complete the manufacturing process of the battery 10. The explosion-proof valve 700 is mainly used to release the pressure in time when the internal pressure of the battery 10 abnormally rises, so as to prevent accidents such as explosion of the battery 10. When the internal pressure of the battery 10 rises, the pressure can be released by punching the explosion-proof valve 700 arranged on the second metal cover plate 600, thereby effectively protecting the safety of the battery 10.

[0095] In some embodiments of the present application, as shown in Figure 2 , the second insulating member 520 of the cover plate assembly 400 is provided with a plurality of holes 540, and the explosion-proof valve 700 communicates with the cavity 210 of the shell 200 through the holes 540. Alternatively, the liquid injection hole 800 communicates with the cavity 210 of the shell 200 through the holes 540.

[0096] It should be noted that the position, size and number of the holes 540 need to be accurately designed according to the specifications and performance of the explosion-proof valve 700, so as to ensure that the explosion-proof valve 700 or the liquid injection hole 800 can work normally and achieve the expected explosion-proof effect or injection of electrolyte. At the same time, the sealing performance of the holes 540 also needs to be considered to prevent external gas or liquid from entering the inside of the battery 10 through the holes 540 when the battery 10 is working normally.

[0097] The embodiments of the present application also provide a battery pack, as shown in Figure 4 and Figure 5As shown, the battery pack includes a tray (not shown in the figure) and a plurality of battery packs 20, the battery pack 20 includes a plurality of batteries 10, and the battery pack 20 is located in the tray. The battery pack also includes a bracket 40, a connecting piece 30, and a functional plate 50. In one possible implementation, a first metal block 420 is arranged on the first metal cover plate 300 of each battery 10, that is, the first metal block 420 connected to the pole 310 carries one kind of charge, and the first metal cover plate 300 and the second metal cover plate 600 carry another kind of charge. A plurality of batteries 10 are connected in series through the connecting piece 30, each connecting piece 30 connects two adjacent batteries 10, one end of the connecting piece 30 is welded to the first metal block 420 of one of the batteries 10, and the other end of the connecting piece 30 is welded to the first metal cover plate 300 or the second metal cover plate 600 of the other battery 10, so that the plurality of batteries 10 are connected in series.

[0098] In another possible implementation, when the first metal block 420 and the second metal block 330 are arranged on the first metal cover plate 300 of the battery 10, that is, the first metal block 420 connected to the pole 310 carries one kind of charge, and the second metal block 330 connected to the first metal cover plate 300 carries another kind of charge, the bracket 40 is fixed on the first metal block 420 and the second metal block 330, a plurality of batteries 10 are connected in series through the connecting piece 30, each connecting piece 30 is welded to two adjacent batteries 10 on one side, one end of the connecting piece 30 is welded to the first metal block 420 of one of the batteries 10, and the other end of the connecting piece 30 is welded to the second metal block 330 of the other battery 10, so that the plurality of batteries 10 are connected in series.

[0099] It can be understood that when the positive and negative lead terminals of the battery 10 are both located on the same side, that is, when one of the positive or negative of the battery 10 is led out from the pole 310 on the first metal cover plate 300, and the other of the positive or negative of the battery 10 is led out from the second metal block 330 on the first metal cover plate 300. That is, only the bracket 40, the connecting piece 30, and the functional plate 50 are arranged on one side of the first metal cover plate 300, and the bracket 40, the connecting piece 30, and the functional plate 50 on the other side of the second metal cover plate 600 are cancelled. Reducing the number of vehicle structural parts in the battery pack, reducing the cost and weight of the battery pack, and facilitating the maintenance and repair of the vehicle battery pack. The second metal block 330 on the first metal cover plate 300 facilitates welding work and avoids the first metal cover plate 300 being welded through or leaking due to welding, resulting in electrolyte leakage.

[0100] As shown in the figure, the battery pack includes a tray (not shown in the figure) and a plurality of battery packs 20, the battery pack 20 includes a plurality of batteries 10, and the battery pack 20 is located in the tray. The battery pack also includes a bracket 40, a connecting piece 30, and a functional plate 50. In one possible implementation, a first metal block 420 is arranged on the first metal cover plate 300 of each battery 10, that is, the first metal block 420 connected to the pole 310 carries one kind of charge, and the first metal cover plate 300 and the second metal cover plate 600 carry another kind of charge. A plurality of batteries 10 are connected in series through the connecting piece 30, each connecting piece 30 connects two adjacent batteries 10, one end of the connecting piece 30 is welded to the first metal block 420 of one of the batteries 10, and the other end of the connecting piece 30 is welded to the first metal cover plate 300 or the second metal cover plate 600 of the other battery 10, so that the plurality of batteries 10 are connected in series. Figure 1As shown, in the embodiments of the present application, the shell 200 of the battery 10 can further be provided with side plates 110, which can provide support and fixing functions for the battery 10, fix the battery 10 at a specific position, and prevent the battery 10 from shaking or falling off during operation. The side plates 110 can also protect the battery 10 from external expansion, extrusion and other physical damage, and reduce the possibility of damage to the battery 10 by external force. It should be noted that the side plates 110 can be symmetrically arranged on both sides of the battery 10, but are not limited to symmetric arrangement, for example, the side plates 110 can also be arranged on one side, which is not limited herein.

[0101] In the examples of the present application, the bracket 40 is fixed on the pole 310 and the second metal block 330 of each battery 10, and the bracket 40 provides stable support for the battery 10, prevents the battery pack from being subjected to external environmental vibration and impact during use, and causes the battery 10 to be displaced or damaged. By setting the bracket 40, the stability of the battery 10 can be maintained, and good contact and electrical connection between the batteries 10 can be ensured. The plurality of batteries 10 in the battery pack can be connected in series through the plurality of connecting pieces 30. Adjacent two batteries 10 are connected through two connecting pieces 30, that is, one side of the connecting piece 30 is welded and connected with the pole 310 of one battery 10 and the second metal block 330 of another battery 10, so as to realize the series connection of the batteries 10.

[0102] The functional plate 50 can be a battery information controller (BIC), but is not limited to the BIC. The functional plate 50 is provided with a plurality of sampling pieces 60, and the sampling pieces 60 are located at the top end and the bottom end of the functional plate 50, respectively. The sampling piece 60 located at the top end of the functional plate 50 is welded and connected with the side of the connecting piece 30 facing away from the battery 10, and the sampling piece 60 located at the bottom end of the functional plate 50 is connected with the first metal cover plate 300 of the battery 10. The functional plate 50 can be used to monitor the voltage, current, temperature and other related information of the battery 10 in real time, so as to ensure the safe and efficient operation of the battery 10.

[0103] In some embodiments of the present application, the battery pack further comprises a protective cover 70, which is arranged on one side of the first metal cover plate 300 and located on the side of the functional plate 50 facing away from the battery 10. The protective cover 70 is used to protect the functional plate 50.

[0104] The functional plate 50 has various electronic components such as controllers, sensors, etc. By arranging the protective cover 70 on one side of the first metal cover plate 300, the damage of the functional plate 50 caused by external impact, water splashing, dust, etc. can be reduced, the normal use of the functional plate 50 is ensured, and the normal operation of the battery pack is facilitated. The protective cover 70 can also provide a certain electromagnetic shielding effect to reduce the influence of external electromagnetic interference on the functional plate 50. A certain buffer gap can be arranged between the protective cover 70 and the functional plate 50 to protect the functional plate 50 from mechanical stress.

[0105] In some embodiments of the present application, the battery pack further comprises a second insulating film (not shown in the figure), which is arranged between two adjacent batteries 10 to insulate the casings 200 of the adjacent batteries 10 from each other. It can be understood that in the embodiments of the present application, the casing 200 of the battery 10 is electrified, and the second insulating film can ensure that the casings 200 of the adjacent batteries 10 are insulated from each other, avoiding short circuit to affect the safety of the battery 10 and the entire battery pack.

[0106] Wherein, the terms such as "upper", "lower", etc. are used to describe the relative position relationship of various structures in the drawings, which is only for the convenience of clear description, and does not limit the scope of the application. The change or adjustment of the relative relationship is also considered as the scope of the application without substantial change of the technical content.

[0107] It should be noted that: in the present application, unless otherwise specified and limited, the first feature is "on" or "under" the second feature. The first and second features can be in direct contact or indirectly contact through an intermediate medium. Moreover, the first feature "above", "above" and "above" the second feature can be directly above or obliquely above the second feature, or only indicate that the horizontal height of the first feature is higher than that of the second feature. The first feature "below", "below" and "below" the second feature can be directly below or obliquely below the second feature, or only indicate that the horizontal height of the first feature is less than that of the second feature.

[0108] In addition, in the present application, unless otherwise specified and limited, the terms "mounting", "connecting", "connecting", "fixing" and the like should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or it can be integrated; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the communication or interaction relationship between two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0109] In the description of the present specification, the description of the terms "one embodiment", "some embodiments", "exemplary embodiment", "example", "specific example", or "some examples" and the like means that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present disclosure. In the present specification, the exemplary description of the above terms does not necessarily mean the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0110] Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present application, and not to limit them; although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand: it can still modify the technical solutions recorded in the foregoing embodiments, or make equivalent replacement for part or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A battery, characterized by, The application relates to a battery, which comprises the following parts: a pole core (100); a shell (200) with a cavity (210) in the shell (200), and the shell (200) has a first end and a second end in a first direction, and the pole core (100) is located in the cavity (210); a cover plate assembly (400) comprising a first metal cover plate (300) and a second metal cover plate (600), the first metal cover plate (300) is connected with the first end of the shell (200), and the first metal cover plate (300) is provided with a pole column (310) insulated from the first metal cover plate (300), and a first electrode of the pole core (100) is electrically connected with the pole column (310); the second metal cover plate (600) is connected with the second end of the shell (200), and a second electrode of the pole core (100) is electrically connected with the second metal cover plate (600), and the first electrode of the pole core (100) is opposite in polarity to the second electrode of the pole core (100).

2. The battery of claim 1, wherein, The pole core (100) is provided with a positive electrode lug towards the first end to form the first electrode, and the pole core (100) is provided with a negative electrode lug towards the second end to form the second electrode; the positive electrode lug is electrically connected with the pole column (310), and the negative electrode lug is electrically connected with the second metal cover plate (600).

3. The battery of claim 1, wherein, The first metal cover plate (300), the shell (200) and the second metal cover plate (600) are electrically connected.

4. The battery of claim 1, wherein, The pole core (100) is provided with a negative electrode lug towards the first end to form the first electrode, and the pole core (100) is provided with a positive electrode lug towards the second end to form the second electrode; the negative electrode lug is electrically connected with the pole column (310), and the positive electrode lug is electrically connected with the second metal cover plate (600).

5. The battery of claim 1, wherein, The cover plate assembly (400) further comprises a lead-out sheet (410) located in the cavity (210), one end of the lead-out sheet (410) is connected with the first electrode of the pole core (100), and the other end of the lead-out sheet (410) is connected with the pole column (310).

6. The battery according to any one of claims 1 to 5, wherein The cover plate assembly (400) further comprises a first metal block (420) located on a side of the first metal cover plate (300) away from the cavity (210) and insulated from the first metal cover plate (300), and the first metal cover plate (300) is provided with an opening (320), and the pole column (310) passes through the opening (320) and is connected with the first metal block (420).

7. The battery of claim 6, wherein, The cover plate assembly (400) further comprises a first insulating piece (510) arranged on a side of the first metal cover plate (300) away from the cavity (210) to insulate the first metal block (420) from the first metal cover plate (300).

8. The battery according to any one of claims 1 to 5, wherein The cover plate assembly (400) further comprises a second insulating piece (520) arranged on a side of the first metal cover plate (300) facing the cavity (210), and a first electrode of the pole core (100) is electrically connected with the pole column (310) through the second insulating piece (520).

9. The battery of claim 6, wherein, The cover plate assembly (400) further comprises a third insulating piece (530) arranged in the opening (320) of the first metal cover plate (300) to insulate the pole column (310) from the first metal cover plate (300).

10. The battery of any one of claims 1-5, wherein, The first metal cover plate (300) further comprises a second metal block (330) electrically connected with the first metal cover plate (300), the shell (200) and the second metal cover plate (600).

11. The battery of any one of claims 1-5, wherein, The battery further comprises an explosion-proof valve (700) arranged on the first metal cover plate (300). Alternatively, the explosion-proof valve (700) is arranged on the second metal cover plate (600). Alternatively, the explosion-proof valve (700) is arranged on the shell (200).

12. The battery of any one of claims 1-5, wherein, The battery further comprises a liquid injection hole (800) arranged on the first metal cover plate (300). Alternatively, the liquid injection hole (800) is arranged on the second metal cover plate (600). Alternatively, the liquid injection hole (800) is arranged on the shell (200).

13. The battery of claim 11, wherein, The cover plate assembly (400) further comprises a second insulating piece (520) arranged on a side of the first metal cover plate (300) facing the cavity (210), and a plurality of holes (540) are arranged on the second insulating piece (520), and the explosion-proof valve (700) arranged on the first metal cover plate (300) is in communication with the cavity (210) through the holes (540).

14. The battery of claim 12, wherein, The cover plate assembly (400) further comprises a second insulating piece (520) arranged on a side of the first metal cover plate (300) facing the cavity (210), and a plurality of holes (540) are arranged on the second insulating piece (520), and the liquid injection hole (800) arranged on the first metal cover plate (300) is in communication with the cavity (210) through the holes (540).

15. A battery pack, characterized by The battery pack (20) comprises the battery (10) according to any one of claims 1-14. The battery pack (20) comprises a connecting piece (30) for electrically connecting at least two batteries (10).

16. The battery pack of claim 15, wherein, The battery pack (20) further comprises a bracket (40) fixed to at least one end of the battery (10), and the connecting piece (30) is positioned and installed on the battery (10) through the bracket (40). ​ 17. The battery pack of claim 16, wherein, The first metal cover plate (300) of the battery (10) is provided with a first metal block (420), the first metal block (420) is located on the side of the first metal cover plate (300) away from the cavity (210) of the battery (10) and is insulatedly connected with the first metal cover plate (300), the first metal block (420) is electrically connected with the first electrode of the pole core (100) through the pole post (310) of the battery (10), and the first metal cover plate (300) is electrically connected with the second electrode of the pole core (100) through the shell (200) of the battery (10) and the second metal cover plate (600). The support (40) is fixed on the first metal block (420), and each connecting piece (30) is welded to two adjacent batteries (10), one end of the connecting piece (30) is connected with the first metal block (420) of one of the batteries (10), and the other end of the connecting piece (30) is connected with the first metal cover plate (300) of the other battery (10), so that the two adjacent batteries (10) are connected in series. Alternatively, each connecting piece (30) is welded to two adjacent batteries (10), one end of the connecting piece (30) is connected with the first metal block (420) of one of the batteries (10), and the other end of the connecting piece (30) is connected with the second metal cover plate (600) of the other battery (10), so that the two adjacent batteries (10) are connected in series.

18. The battery pack of claim 16, wherein, The first metal cover plate (300) of the battery (10) is provided with a first metal block (420) and a second metal block (330), the first metal block (420) is located on the side of the first metal cover plate (300) away from the cavity (210) of the battery (10) and is insulatedly connected with the first metal cover plate (300), the first metal block (420) is electrically connected with the first electrode of the pole core (100) through the pole post (310), and the second metal block (330) provided on the first metal cover plate (300) is electrically connected with the second electrode of the pole core (100) through the shell (200) of the battery (10) and the second metal cover plate (600). The support (40) is fixed on the first metal block (420) and the second metal block (330), and each connecting piece (30) is welded to two adjacent batteries (10), one end of the connecting piece (30) is connected with the first metal block (420) of one of the batteries (10), and the other end of the connecting piece (30) is connected with the second metal block (330) of the other battery (10), so that the two adjacent batteries (10) are connected in series.

19. The battery pack of any of claims 16-18, wherein, Further comprising a functional plate (50) and a sampling piece (60), the sampling piece (60) is arranged at both ends of the functional plate (50), the functional plate (50) is connected with the battery (10) through the sampling piece (60), and the functional plate (50) is used for collecting operation information of the battery (10); The sampling piece (60) at one end of the functional plate (50) is connected with the side of the connecting piece (30) away from the battery (10), and the sampling piece (60) at the other end of the functional plate (50) is connected with the first metal cover plate (300) or the second metal cover plate (600) of the battery (10).

20. The battery pack of claim 19, wherein, Further comprising a protective cover (70), the protective cover (70) is arranged on the side of the functional plate (50) away from the battery (10), and the protective cover (70) is used for protecting the functional plate (50).

21. The battery pack of any one of claims 16-18, wherein, Further comprising a second insulating film, the second insulating film is arranged between two adjacent batteries (10) to insulate the casings (200) of the adjacent batteries (10) from each other.

22. An electrical device, comprising: Comprise: An electric device, and the battery pack of any one of claims 15-21 or the battery (10) of any one of claims 1-14, the battery pack or the battery is used to provide electric energy for the electric device.

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