Battery, battery module, and vehicle

Abstract

A battery (100), a battery module (1000), and a vehicle. The battery (100) comprises a housing (10), a battery cell (20), and two connecting pieces (30). At least a partial region of the housing (10) is electrically conductive. The battery cell (20) is accommodated in the housing (10). The two connecting pieces (30) are electrically connected to two electrodes (22) of the battery cell (20), respectively.

Description

Batteries, battery modules and vehicles

[0001] This application claims priority to the Chinese patent application filed with the China Patent Office on December 18, 2023, with application number 202311744091.5 and invention name “Battery, Battery Module and Vehicle”, the entire contents of which are incorporated by reference into this application. Technical Field

[0002] The present application relates to the field of batteries, and in particular to a battery, a battery module including the battery, and a vehicle including the battery module. Background Art

[0003] Batteries are generally divided into soft-pack batteries and hard-pack batteries. Soft-pack batteries typically use aluminum-plastic film to support the battery cells, but the structural strength of aluminum-plastic film is relatively weak. Increasing the thickness of the aluminum-plastic film to increase strength will lead to increased battery costs.

[0004] Hard-pack batteries typically use a metal casing to hold the battery cells, with a cover plate equipped with conductive posts providing electrical connection between the cells and the external environment. However, in actual manufacturing, high precision assembly between the cover plate and the metal casing is required to ensure a sealed battery, which increases costs.

[0005] Summary of the Invention

[0006] In view of the above-mentioned deficiencies in the prior art, the purpose of this application is to provide a battery with improved sealing performance, a battery module including the battery, and a vehicle including the battery module. Specifically, the technical solutions include the following:

[0007] In a first aspect, an embodiment of the present application provides a battery, comprising: a shell having a conductive area; a battery cell housed in the shell; and two connecting pieces, respectively connected to two electrodes of the battery cell; wherein, one of the connecting pieces is connected to the conductive area of ​​the shell, and the other connecting piece extends out of the shell and is separated from the conductive area of ​​the shell, and the conductive area of ​​the shell and the connecting piece extending out of the shell are respectively used to be connected to an external circuit.

[0008] The battery of the present application connects a connecting piece that is conductive to the electrode of the battery cell to the conductive area of ​​the shell, and extends another connecting piece that is conductive to the electrode of the battery cell out of the shell, so that the battery of the present application can be connected to the external circuit through the connecting piece extending out of the shell and the conductive area of ​​the shell. While realizing the current transmission function of the battery of the present application, the influence of the extension of the connecting piece on the sealing performance is reduced, thereby improving the sealing performance of the battery of the present application and reducing the cost.

[0009] In one embodiment, the housing includes two detachable parts, and the conductive area of ​​the housing is provided on one of the parts of the housing.

[0010] In one embodiment, at least one of the two parts of the housing includes a bottom plate and a side plate, and the conductive area of ​​the housing is at least provided on the side plate and is electrically connected to a connecting piece.

[0011] In one embodiment, the connecting piece extending out of the housing passes through the gap between the two parts of the housing.

[0012] In one embodiment, the battery further includes an insulating member, which is at least partially located at the gap and located in a space formed by the connecting piece extending out of the shell and the gap.

[0013] In one embodiment, the insulating member fills the space formed by the connecting piece and the gap, and the insulating member is also used to seal the gap.

[0014] In one embodiment, the battery further includes a sealing member, one end of which surrounds and is fixed to the end of the connecting piece extending out of the shell, and the other end of the sealing member extends toward the shell and fits against the outer surface of the shell.

[0015] In one embodiment, the two electrodes of the battery cell are spaced apart and arranged on the same side of the battery cell.

[0016] In one embodiment, the battery further includes a positioning plate, which is accommodated in the shell. The positioning plate is provided with two through holes spaced apart from each other. Two connecting plates respectively pass through a through hole and are connected to an electrode. The positioning plate is used to limit the relative position between the two connecting plates.

[0017] In one embodiment, opposite ends of the insulating member extend into and out of the housing, respectively.

[0018] In one embodiment, the housing is provided with a first protrusion and a second protrusion, wherein the gap is provided in the first protrusion.

[0019] In one embodiment, the housing is provided with a recessed portion, and the first protrusion and the second protrusion are both provided in the recessed portion.

[0020] In one embodiment, the battery core includes a plurality of pole cores provided with pole tabs, wherein the plurality of pole cores include a plurality of positive pole cores and a plurality of negative pole cores.

[0021] In one embodiment, the battery further includes a plurality of fixing members, wherein the fixing members are disposed on the outer edge of the shell to fix the battery.

[0022] In a second aspect, an embodiment of the present application provides a battery module, comprising a battery tray and the battery according to the first aspect, wherein the battery is accommodated in the battery tray.

[0023] In a third aspect, an embodiment of the present application provides a vehicle comprising the battery module according to the second aspect.

[0024] It can be understood that the battery module provided in the second aspect of this application and the vehicle provided in the third aspect both have the effect of improving sealing performance and reducing costs because they adopt the battery provided in the first aspect of this application. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] FIG1 is an exploded schematic diagram of a battery 100 provided in one embodiment of the present application;

[0026] FIG2 is a schematic diagram of a partial structure of a battery 100 provided in one embodiment of the present application;

[0027] FIG3 is a partial cross-sectional schematic diagram of a battery 100 provided in one embodiment of the present application;

[0028] FIG4 is a partially enlarged schematic diagram of a battery 100 provided in one embodiment of the present application;

[0029] FIG5 is another partial structural diagram of a battery 100 provided in one embodiment of the present application;

[0030] FIG6 is another exploded schematic diagram of the battery 100 provided in one embodiment of the present application;

[0031] FIG7 is a schematic structural diagram of a battery 100 provided in one embodiment of the present application;

[0032] FIG8 is another exploded schematic diagram of the battery 100 provided in one embodiment of the present application;

[0033] FIG9 is another structural schematic diagram of a battery 100 provided in one embodiment of the present application;

[0034] FIG10 is a schematic structural diagram of a battery cell 20 provided in one embodiment of the present application;

[0035] FIG11 is another structural schematic diagram of a battery cell 20 provided in one embodiment of the present application;

[0036] FIG12 is a schematic structural diagram of a battery module 1000 provided in one embodiment of the present application.

[0037] Description of reference numerals:

[0038] 1000-battery module, 100-battery cell, 200-battery tray, 10-housing, 20-battery cell.

[0039] 21-pole core, 22-electrode, 221-positive electrode, 222-negative electrode, 30-connecting piece, 31-first connecting piece, 32-second connecting piece, 11-shell body, 12-cover, 13-gap, 10a-bottom plate, 10b-side plate, 111-first bottom plate, 112-first side plate, 121-second bottom plate, 122-second side plate, 113-first epitaxial structure, 123-second epitaxial structure, 40-insulating member, 50-sealing member, 60-positioning plate, 61-through hole, 14-bump, 141-first bump, 142-second bump, 70-liquid injection hole, 80-explosion-proof valve, 90-fixing member, 211-ear, 21a-positive core, 21b-negative core, 211a-positive ear, 211b-negative ear, 15-recessed portion, 23- Insulating film, 114 - first part, 124 - second part, 001 - first direction, 002 - second direction, 003 - third direction. DETAILED DESCRIPTION

[0040] To facilitate understanding of the present application, a more comprehensive description of the present application will be provided below with reference to the accompanying drawings. The accompanying drawings illustrate preferred embodiments of the present application. However, the present application can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided to provide a more thorough and comprehensive understanding of the disclosure of the present application.

[0041] The following descriptions of the embodiments are with reference to the attached diagrams to illustrate specific embodiments that the present application can be used to implement. The serial numbers of the components herein, such as "first", "second", etc., are only used to distinguish the objects described and do not have any order or technical meaning. The "connection" and "coupling" mentioned in the present application include direct and indirect connections (couplings) unless otherwise specified. The directional terms mentioned in the present application, such as "up", "down", "front", "back", "left", "right", "inside", "outside", "side", etc., are only with reference to the directions of the attached drawings. Therefore, the directional terms used are for better and clearer explanation and understanding of the present application, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present application.

[0042] In the description of this application, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood broadly. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to mechanical connections; they can refer to direct connections, indirect connections through an intermediate medium, or internal connections between two components. A person of ordinary skill in the art will understand the specific meanings of the above terms in this application based on the specific circumstances. It should be noted that the terms "first," "second," and so on, in the specification, claims, and accompanying drawings of this application are used to distinguish between different objects, not to describe a specific order. Furthermore, the terms "include," "may include," "comprise," or "may include" as used in this application indicate the presence of the corresponding functions, operations, components, etc. disclosed, and do not limit the presence or absence of one or more additional functions, operations, components, etc. Furthermore, the terms "include" or "comprising" indicate the presence of the corresponding features, numbers, steps, operations, elements, components, or combinations thereof disclosed in the specification, and do not exclude the presence or addition of one or more other features, numbers, steps, operations, elements, components, or combinations thereof, and are intended to cover non-exclusive inclusions.

[0043] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art to which this application pertains. The terms used herein in the specification of this application are only for the purpose of describing specific embodiments and are not intended to limit this application.

[0044] The vehicle provided in this application includes a vehicle body and a battery module 1000 as described in FIG12 , wherein the battery module 1000 is housed in the vehicle body to protect the battery module. The battery module 1000 is used to provide electrical energy to the vehicle and drive the vehicle. The battery module 1000 includes a battery 100 and a battery tray 200, wherein a plurality of batteries connected in parallel and / or in series are housed in the battery tray to protect the battery. The plurality of batteries cooperate with each other to convert the chemical energy stored in the battery into electrical energy and transmit it to the vehicle, thereby realizing the current transmission function of the battery.

[0045] Please refer to Figure 1 for an exploded schematic diagram of a battery 100 provided in one embodiment of the present application, and Figure 2 for a partial structural diagram of a battery 100 provided in one embodiment of the present application. For ease of description, Figure 2 omits some structures of the battery 100.

[0046] As shown in Figures 1 and 2, the battery 100 of the present application includes a housing 10 and a battery cell 20. The battery cell 20 is housed in the housing 10, which is used to prevent external impurities from entering the housing 10, thereby protecting the battery cell 20. At the same time, the housing 10 also provides a storage space for accommodating an electrolyte (not shown in the figure), so that the external electrolyte can also be injected into the housing 10 and cooperate with the battery cell 20 to achieve the charge and discharge performance of the battery 100 of the present application.

[0047] The battery cell 20 includes a core 21 and two electrodes 22. The two electrodes 22 are a positive electrode 221 and a negative electrode 222, respectively. The positive electrode 221 and the negative electrode 222 are electrically connected to the positive core (not shown) and the negative core (not shown) in the core 21, respectively. It is understood that the chemical energy stored in the electrolyte can generate electrical energy under the action of the core 21. The generated electrical energy can be output to the outside via the positive electrode 221 and the negative electrode 222. This achieves the current output function of the battery 100 of the present application.

[0048] At the same time, external current can also be input into the pole core 21 through the positive electrode 221 and the negative electrode 222, and cooperate with the electrolyte to convert electrical energy into chemical energy and store it in the electrolyte, thereby realizing the charging function of the battery 100 of the present application.

[0049] For ease of description, in FIG. 1 and subsequent figures, the plane directions of the housing 10 are respectively set to a first direction 001 and a second direction 002 perpendicular to each other, and a third direction 003 perpendicular to the first direction 001 and the second direction 002 is set.

[0050] Please refer to FIG3 , which is a partial cross-sectional view of a battery 100 provided in an embodiment of the present application, and refer to FIG1 and FIG2 in conjunction therewith.

[0051] As shown in Figures 1-3, the battery 100 of the present application further includes two connecting pieces 30, namely a first connecting piece 31 and a second connecting piece 32. One end of the first connecting piece 31 is electrically connected to the positive electrode 221, and the other end passes through the housing 10 along the second direction 002 and partially extends out of the housing 10.

[0052] At least a portion of the housing 10 is conductive. One end of the second connecting tab 32 is electrically conductive to the negative electrode 222, and the other end is electrically conductive to the conductive region. Furthermore, the first connecting tab 31 is spaced from the conductive region to prevent electrical conduction between the first and second connecting tabs 31, 32 through the conductive region, thereby ensuring the safety of the battery 100 of the present application.

[0053] The external circuit can be electrically connected to the first connecting piece 31 extending out of the housing 10 and the conductive area of ​​the housing 10, respectively. Specifically, the positive electrode of the external circuit can be electrically connected to the positive electrode 221 of the battery cell 20 through the first connecting piece 31, and the negative electrode of the external circuit can be electrically connected to the second connecting piece 32 through the conductive area of ​​the housing 10, and then electrically connected to the negative electrode 222 through the second connecting piece 32. This facilitates the charge and discharge functions of the battery 100 of the present application.

[0054] It is understandable that in other embodiments, the first connecting tab 31 may also be electrically connected to the negative electrode 222 of the battery cell 20, and correspondingly, the second connecting tab 32 should be electrically connected to the positive electrode 221 of the battery cell 20. Accordingly, the positive electrode of the external circuit is electrically connected to the second connecting tab 32, and the negative electrode of the external circuit is electrically connected to the first connecting tab 31.

[0055] Therefore, compared with the conventional hard-pack battery that uses a cover with a conductive column to realize the conduction between the battery cell in the shell and the external circuit, the battery 100 of the present application is provided with a shell 10 having conductivity in at least a part of the area, and the second connecting piece 32 is connected between the conductive area of ​​the shell 10 and one electrode 22, and the first connecting piece 31 extending out of the shell 10 is connected to the other electrode 22 and is spaced from the conductive area. Under the premise of ensuring the charge and discharge function of the battery 100 of the present application, the number of connecting pieces 30 extending out of the shell 10 is reduced, thereby reducing the impact of the extension of the connecting piece 30 on the sealing performance, thereby improving the sealing performance of the battery 100 of the present application.

[0056] Specifically, in one embodiment, as shown in Figures 1-3, the housing 10 includes two detachably connected parts, and the conductive area of ​​the housing 10 is disposed on one part of the housing 10. The two parts of the housing 10 are the housing body 11 and the cover 12. Along the third direction 003, the housing body 11 and the cover 12 are attached to each other to form a receiving space for accommodating the battery cell 20 (not shown in the figure). The conductive area of ​​the housing 10 is disposed on the housing body 11 and / or the cover 12.

[0057] The end of the second connecting tab 32 facing away from the battery cell 20 is attached to the connection between the housing body 11 and the cover 12, while the first connecting tab 31 passes through the gap 13 between the housing body 11 and the cover 12. When the housing body 11 is conductive, the first connecting tab 31 is spaced apart from the housing body 11. When the cover 12 is conductive, the first connecting tab 31 is spaced apart from the cover 12. This ensures that the first connecting tab 31 is spaced apart from the conductive area of ​​the housing 10, thereby preventing a short circuit between the first connecting tab 31 and the second connecting tab 32.

[0058] It is understandable that the end of the second connecting piece 32 is disposed at the connection between the housing body 11 and the cover body 12, so that when the housing body 11 is fixedly connected to the cover body 12, the second connecting piece 32 can also be fixedly connected between the housing body 11 and the cover body 12, thereby ensuring the conduction between the second connecting piece 32 and the conductive area of ​​the housing 10 while limiting the position of the second connecting piece 32. This prevents the position of the second connecting piece 32 from shifting during transportation, causing short circuits and the like. This further improves the safety performance of the battery 100 of the present application.

[0059] Please refer to FIG4 , which is a partially enlarged schematic diagram of a battery 100 provided in one embodiment of the present application, and refer to FIG1 in conjunction with the diagram.

[0060] As shown in Figures 1 and 4 , at least one of the two parts of the housing 10 includes a bottom plate 10a and a side plate 10b. The side plate 10b surrounds the edge of the bottom plate 10a to form a receiving space (not shown) capable of accommodating the battery cell 20. The end of the second connecting piece 32 facing away from the battery cell 20 is in contact with the surface of the side plate 10b facing the battery cell 20.

[0061] Specifically, as shown in Figure 1 , the housing body 11 includes a first bottom plate 111 and a first side plate 112, with the first side plate 112 surrounding the edge of the first bottom plate 111. The housing body 11 is conductive. The bottom plate 10a in Figure 4 represents the first bottom plate 111, and the side plate 10b represents the first side plate 112. Accordingly, the end of the second connecting piece 32 facing away from the battery cell 20 is in contact with and electrically connected to the surface of the first side plate 112 facing the battery cell 20, thereby facilitating electrical communication between the external circuit and the battery cell 20 through the housing body 11 and the first connecting piece 31.

[0062] As shown in Figure 1 , the cover 12 includes a second base plate 121 and a second side plate 122, which surrounds the edge of the second base plate 121. The cover 12 is electrically conductive. In Figure 4 , the base plate 10a represents the second base plate 121, and the side plate 10b represents the second side plate 122. Accordingly, the end of the second connecting tab 32 facing away from the battery cell 20 mates with and is electrically connected to the surface of the second side plate 122 facing the battery cell 20, facilitating electrical communication between the external circuit and the battery cell 20 via the cover 12 and the first connecting tab 31.

[0063] It is understandable that the end of the second connecting piece 32 is attached to the surface of the side plate 10b close to the battery cell 20 to ensure that the second connecting piece 32 is fully accommodated in the housing 10, thereby further reducing the impact of the second connecting piece 32 on the connection between the housing body 11 and the cover 12. This further improves the sealing performance of the battery 100 of the present application.

[0064] In another embodiment, the housing body 11 includes a first bottom plate 111 and a first side plate 112. The corresponding cover body 12 can be configured as a sheet-like structure. Correspondingly, in another embodiment, the cover body 12 includes a second bottom plate 121 and a second side plate 122, and the corresponding housing body 11 is configured as a sheet-like structure.

[0065] In one embodiment, as shown in Figures 1 to 4 , the positive electrode 221 and the negative electrode 222 of the battery cell 20 are located on the same side of the pole core 21 along the second direction 002. Correspondingly, the first connecting piece 31 and the second connecting piece 32 are also located on the same side of the pole core 21.

[0066] It is understandable that in other embodiments, as shown in FIG. 5 , the first connecting piece 31 and the second connecting piece 32 may also be located on different sides of the pole core 21 to increase the distance between the first connecting piece 31 and the second connecting piece 32 to further avoid short circuit.

[0067] In one embodiment, as shown in Figures 1-3, the battery 100 of the present application further includes an insulating member 40, which is partially located in the gap 13 and in the space formed by the first connecting piece 31 and the gap 13, and is attached to the surface of the first connecting piece 31.

[0068] As at least a portion of the housing 10 is conductive, the provision of the insulating member 40 can achieve a mutual spacing between the first connecting piece 31 and the housing 10, thereby preventing the first connecting piece 31 from contacting the conductive area of ​​the housing 10, thereby ensuring the safety of the battery 100 of the present application.

[0069] At the same time, the provision of the insulating member 40 can also reduce the gap between the first connecting piece 31 and the gap 13, thereby shielding the gap 13 and reducing the possibility of external impurities entering the housing 10 through the gap 13. This ensures the sealing performance of the battery 100 of the present application.

[0070] In one embodiment, as shown in Figures 1-3, the insulating member 40 fills the space formed by the first connecting piece 31 and the gap 13, thereby preventing external impurities from entering the housing 10 through the gap 13 and preventing the electrolyte in the housing 10 from flowing out of the housing 10 through the gap 13. Thus, the insulating member 40 can cooperate with the first connecting piece 31 to seal the gap 13, thereby improving the sealing performance of the battery 100 of the present application.

[0071] In one embodiment, as shown in Figures 1-3, along the second direction 002, opposite ends of the insulating member 40 may further extend into and out of the housing 10, respectively, to further enhance the insulating effect of the insulating member 40 on the first connecting piece 31, further reducing the possibility of electrical conduction between the first connecting piece 31 and the second connecting piece 32. This further enhances the safety performance of the battery 100 of the present application.

[0072] At the same time, when the insulating member 40 fills the space formed by the first connecting piece 31 and the gap 13, the extension of the opposite ends of the insulating member 40 can further enhance the sealing effect of the insulating member 40 on the gap 13, thereby further enhancing the sealing performance of the battery 100 of the present application.

[0073] In one embodiment, as shown in Figures 1-3, the battery 100 of the present application also includes a seal 50, which is located outside the shell 10, and the seal 50 exchanges heat and is fixed to the end of the first connecting piece 31 extending out of the shell 10, and extends toward the shell 10 and fits with the outer surface of the shell 10.

[0074] It is understandable that when the insulating member 40 does not completely fill the space formed by the first connecting piece 31 and the gap 13, the provision of the sealing member 50 further prevents external impurities from entering the housing 10. At the same time, it also prevents the internal electrolyte from flowing out of the housing 10 through the gap between the insulating member 40 and the gap 13. This improves the sealing performance of the battery 100 of the present application.

[0075] When the insulating member 40 completely fills the space formed by the first connecting piece 31 and the gap 13, the provision of the sealing member 50 further enhances the sealing effect of the gap 13 of the present application, thereby further enhancing the sealing performance of the battery 100 of the present application.

[0076] In one embodiment, the insulating member 40 is made of a copolymer such as polypropylene.

[0077] In one embodiment, the seal 50 is made of a heat-activated sealing material, exemplarily polypropylene. It is understood that in other embodiments, the seal 50 may also be made of a liquid or gel-like adhesive that is cured. This application does not impose any particular limitation on this.

[0078] Please refer to FIG. 6 , which shows another exploded schematic diagram of a battery 100 provided in an embodiment of the present application.

[0079] As shown in Figure 6, the positive electrode 221 and the negative electrode 222 of the battery cell 20 are spaced apart and arranged on the same side of the battery cell 20. The battery 100 of the present application includes a positioning plate 60, which is accommodated in the housing 10 and has two spaced-apart through holes 61 formed thereon. Each through hole 61 is disposed correspondingly to the positive electrode 221 and the negative electrode 222, respectively.

[0080] Specifically, one end of the first connecting piece 31 passes through a corresponding through-hole 61 to connect to the positive electrode 221, and the other end extends out of the housing 10 to connect to the external circuit. One end of the second connecting piece 32 passes through another through-hole 61 to connect to the negative electrode 222, and the other end connects to the conductive area of ​​the housing 10.

[0081] During transportation of the battery 100, the first connecting piece 31 and the second connecting piece 32 may shift along the first direction 001 due to vibrations during transportation. It is understood that the positioning plate 60 can define the relative position between the first connecting piece 31 and the second connecting piece 32, thereby preventing the first connecting piece 31 and the second connecting piece 32 from shifting along the first direction 001 and causing a short circuit between the two connecting pieces 30. This further ensures the safe use of the battery 100 of the present application.

[0082] In one embodiment, as shown in Figures 1-3, the housing body 11 further includes a first extension structure 113, which is disposed at an end of the first side plate 112 away from the first bottom plate 111 and extends outward in a direction away from the battery cell 20. Correspondingly, the cover body 12 further includes a second extension structure 123, which is disposed at an end of the second side plate 122 away from the second bottom plate 121 and extends outward in a direction away from the battery cell 20.

[0083] The first epitaxial structure 113 and the second epitaxial structure 123 can cooperate with each other and be fixedly connected, thereby achieving a fixed connection between the housing body 11 and the cover body 12. It can be understood that the provision of the first epitaxial structure 113 and the second epitaxial structure 123 can increase the contact area between the housing body 11 and the cover body 12 while ensuring that the overall thickness of the housing body 11 and the cover body 12 remains unchanged, thereby facilitating the connection between the housing body 11 and the cover body 12.

[0084] Specifically, in this embodiment, the connection between the housing body 11 and the cover 12 can be achieved by welding, where the first epitaxial structure 113 and the second epitaxial structure 123 are welded together along the first direction 001 and the second direction 002. The welded portion includes the end of the housing 10 where the second connecting tab 32 is located, away from the battery cell 20, and does not include the gap 13 in the housing 10 through which the end of the first connecting tab 31 away from the battery cell 20 passes.

[0085] Therefore, compared to the higher assembly precision requirements of the cover and shell required by the prior art hard-pack batteries, the connection method between the shell body 11 and the cover body 12 provided in the battery 100 of the present application can reduce the precision requirements, thereby reducing the manufacturing cost of the battery 100 of the present application.

[0086] It is understandable that in other embodiments, the connection method between the shell body 11 and the cover body 12 in the battery 100 of the present application can also be other, and the present application does not specifically limit this.

[0087] Please refer to FIG7 , which is a schematic structural diagram of a battery 100 provided in an embodiment of the present application, and refer to FIG3 in conjunction therewith.

[0088] As shown in Figures 3 and 7, the housing 10 is provided with two protrusions 14: a first protrusion 141 and a second protrusion 142. A gap 13 is provided within the first protrusion 141. The end of the first connecting piece 31, away from the battery cell 20, extends through the gap 13 and out of the first protrusion 141. The sealing member 50 surrounds and is fixed to the periphery of the first connecting piece 31, extending along the second direction 002 toward the outer surface of the housing 10 and surrounding the periphery of the first protrusion 141.

[0089] In the present application, the connection between the cover 12 and the housing body 11 is welded. In actual manufacturing, when the first epitaxial structure 113 and the second epitaxial structure 123 are welded together, the unwelded portion can be trimmed to reduce the overall size of the battery 100. During the trimming process, the area where the second connecting piece 32 is sandwiched and the area where the gap 13 is located are avoided to form the first bump 141 and the second bump 142, respectively.

[0090] The first protrusion 141 includes a first portion 114 located on the housing body 11 and a second portion 124 located on the cover 12. The first portion 114 and the second portion 124 are welded to each other, and a gap 13 is formed therebetween.

[0091] It is understood that the seal 50 is disposed around the periphery of the first protrusion 141 and is in contact with the outer surface of the housing 10, which can prevent the electrolyte in the housing 10 from flowing out of the sidewall of the first protrusion 141 through the gap 13 along the first direction 001. This further improves the sealing effect of the seal 50 on the gap 13 and further improves the sealing performance of the battery 100 of the present application.

[0092] The second protrusion 142 ensures the connection area between the second connecting piece 32 and the housing body 11 and the cover 12, thereby ensuring the welding strength of the second connecting piece 32 and improving the connection stability of the battery 100 of the present application.

[0093] In one embodiment, as shown in FIG7 , the housing 10 is further provided with a recessed portion 15, which extends along the second direction 002 toward the battery cell 20, and the first protrusion 141 and the second protrusion 142 are both disposed within the recessed portion 15. It is understood that the provision of the recessed portion 15 reduces the size of the first protrusion 141 and the second protrusion 142 in the second direction 002, thereby increasing the space occupied by the battery cell 20 and thereby improving the capacity of the battery 100 of the present application.

[0094] In one embodiment, the housing body 11 is made of a conductive metal material. For example, the housing body 11 is made of an iron alloy, an aluminum alloy, or the like. It is understood that, compared to the aluminum-plastic film structure used in conventional soft-pack batteries, the battery 100 of the present application uses a metal material to make the housing body 11, thereby improving the strength of the housing 10 and thereby improving the structural strength of the battery 100 of the present application.

[0095] In one embodiment, the thickness of the shell body 11 is between 20 μm and 500 μm. It is understandable that setting the shell body 11 with a thickness between 20 μm and 500 μm can ensure the strength of the shell body 11 while preventing the shell body 11 from being too thick and occupying too much space in the battery cell 20, thereby affecting the capacity of the battery 100 of the present application.

[0096] In one embodiment, the cover 12 is made of a conductive metal material. For example, the cover 12 is made of an iron alloy, an aluminum alloy, or the like. It is understood that, compared to the aluminum-plastic film structure used in conventional soft-pack batteries, the battery 100 of the present application uses a metal material to make the cover 12, thereby improving the strength of the housing 10 and thus improving the structural strength of the battery 100 of the present application.

[0097] In one embodiment, the thickness of the cover 12 is between 20 μm and 500 μm. It is understood that setting the cover 12 to have a thickness between 20 μm and 500 μm can ensure the strength of the cover 12 while preventing the cover 12 from being too thick and occupying too much space in the battery cell 20, thereby affecting the capacity of the battery 100 of the present application.

[0098] In one embodiment, as shown in FIG7 , the housing body 10 is further provided with an injection hole 70 , which is connected to the housing 10 , so as to facilitate injection of electrolyte into the housing 10 through the injection hole 70 , thereby improving the injection efficiency of the electrolyte.

[0099] Therefore, compared with the electrolyte injection method used in soft-pack batteries, the battery 100 of the present application injects electrolyte by providing an injection hole 70, which can reduce the loss of electrolyte during electrolyte injection, thereby achieving control of the electrolyte flow in the shell 10.

[0100] Please refer to FIG. 8 , which shows another exploded schematic diagram of the battery 100 provided in one embodiment of the present application.

[0101] As shown in FIG8 , the battery 100 of the present application further includes an explosion-proof valve 80 . The explosion-proof valve 80 is disposed on the cover 12 . When the battery 100 is exposed to high temperature and high pressure, the explosion-proof valve 80 opens to release the pressure of the gas inside the housing 10 , thereby ensuring the safety of the battery 100 of the present application.

[0102] Specifically, in this embodiment, the explosion-proof valve 80 can be formed by thinning a portion of the cover 12 so that when high-temperature, high-pressure gas is generated in the housing 10, the high-temperature, high-pressure gas can directly break through the portion to release pressure, thereby ensuring the safety of the battery 100 of the present application.

[0103] In one embodiment, the insulating member 40 and the sealing member 50 also serve as the structure of the explosion-proof valve 80. This allows for pressure relief when high-temperature, high-pressure gas is generated within the housing 10. Alternatively, the high-temperature environment can directly melt the insulating member 40 and the sealing member 50, or the high-pressure environment can directly damage the sealing structure formed by the insulating member 40 and the sealing member 50, thereby ensuring the safe use of the battery 100 of the present application.

[0104] Please refer to FIG. 9 , which is another structural diagram of a battery 100 provided in an embodiment of the present application.

[0105] As shown in FIG. 9 , the battery 100 of the present application further includes a fixing member 90 , wherein a plurality of fixing members 90 are provided and are disposed on the outer edge of the housing 10 to facilitate fixing the battery 100 in the battery tray.

[0106] Please refer to FIG10 , which is a schematic structural diagram of a battery cell 20 provided in an embodiment of the present application, and refer to FIG1 in conjunction therewith.

[0107] As shown in Figures 1 and 10, the battery cell 20 of the present application includes a plurality of electrode cores 21 provided with electrode tabs 211, wherein the plurality of electrode cores 21 include a plurality of positive electrode cores 21a and a plurality of negative electrode cores 21b. Each positive electrode core 21a corresponds to a positive electrode tab 211a, and each negative electrode core 21b corresponds to a negative electrode tab 211b. The plurality of positive electrode tabs 211a are gathered together and welded together to form a positive electrode 221, and the plurality of negative electrode tabs 211b are gathered together and welded together to form a negative electrode 222. The positive electrode cores 21a and the negative electrode cores 21b are alternately stacked along the third direction 003.

[0108] The charge and discharge performance of the battery 100 primarily stems from the conversion between electrical and chemical energy, which is primarily achieved through the positive electrode core 21a, the negative electrode core 21b, and the electrolyte (not shown). When the battery 100 is connected to an external circuit, the positive electrode core 21a undergoes an oxidation reaction with the electrolyte, generating electrons, while the negative electrode core 21b undergoes a reduction reaction with the electrolyte, losing electrons. This creates a potential difference between the positive and negative electrode cores 21a, 21b, thereby achieving the conversion between chemical and electrical energy.

[0109] When the external circuit inputs current to the positive electrode core 21a and the negative electrode core 21b, due to the potential difference between the positive electrode core 21a and the negative electrode core 21b, the positive electrode core 21a and the negative electrode core 21b will react chemically with the electrolyte, thereby converting electrical energy into chemical energy and storing it in the electrolyte.

[0110] In order to make the battery 100 hold more electricity, it is necessary to increase the contact area between the positive electrode core 21a, the negative electrode core 21b and the electrolyte. By setting multiple positive electrode cores 21a and multiple negative electrode cores 21b, and arranging multiple positive electrode cores 21a and multiple negative electrode cores 21b alternately, the battery 100 of the present application can have a larger capacity.

[0111] At the same time, the electrical energy generated by the interaction between the positive electrode core 21a and the negative electrode core 21b can be output to the external circuit through each positive electrode tab 211a and each negative electrode tab 211b, thereby achieving the discharge function of the battery 100 of the present application. On the other hand, the current input by the external circuit can also be transmitted to the battery core 20 through each positive electrode tab 211a and each negative electrode tab 211b, thereby achieving the charging function of the battery 100 of the present application.

[0112] It can be understood that in this embodiment, as shown in FIG10 , multiple positive electrode cores 21 a and multiple negative electrode cores 21 b are alternately formed to form a battery cell 20 , thereby making the battery 100 of the present application a blade battery.

[0113] In another embodiment, as shown in FIG11 , a plurality of positive electrode cores 21 a may be connected as one, and a plurality of negative electrode cores 21 b may also be connected as one, so that the positive electrode cores 21 a and the negative electrode cores 21 b are adhered to each other and wound to form a battery cell 20 , thereby making the battery 100 of the present application a roll battery.

[0114] It is understood that in this embodiment, the materials of the positive electrode core 21a and the negative electrode core 21b provided by the battery 100 of the present application are different, so that the battery 100 of the present application can achieve the charge and discharge function of the battery 100 of the present application through the chemical reaction between the materials of the positive electrode core 21a and the negative electrode core 21b and the electrolyte. Exemplarily, the battery 100 of the present application is a lithium-ion battery. In another embodiment, the materials of the positive electrode core 21a and the negative electrode core 21b provided by the battery 100 of the present application can also be the same. Exemplarily, the battery 100 of the present application can be a sodium-ion battery.

[0115] In one embodiment, as shown in Figures 10 and 11, the battery cell 20 further includes a plurality of insulating films 23, which are disposed between the positive electrode core 21a and the negative electrode core 21b and adhere to the positive electrode core 21a and the negative electrode core 21b, respectively. This is to achieve mutual insulation between the positive electrode core 21a and the negative electrode core 21b, preventing problems such as short circuits and leakage in the battery cell 20 due to conduction between the positive electrode core 21a and the negative electrode core 21b. This ensures the safety of the battery 100 of the present application.

[0116] It should be understood that the terms "first," "second," etc. are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the described features. In the description of the embodiments of this application, "plurality" means two or more, unless otherwise specifically defined.

[0117] Throughout this specification, reference to terms such as "one embodiment," "some embodiments," "illustrative embodiments," "examples," "specific examples," or "some examples" means that a specific feature, structure, material, or characteristic described in conjunction with the embodiment or example is included in at least one embodiment or example of the present application. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

[0118] It should be understood that the application of this application is not limited to the above examples. Those skilled in the art can make improvements or modifications based on the above description, and all such improvements and modifications should fall within the scope of protection of the claims appended to this application. Those skilled in the art will understand that implementing all or part of the processes of the above embodiments and making equivalent changes in accordance with the claims of this invention still fall within the scope of this invention.

Claims

1. A battery (100), characterized in that: include: A housing (10), wherein the housing (10) has a conductive area; A battery cell (20) is housed in the housing (10); and Two connecting sheets (30) are respectively connected to two electrodes (22) of the battery cell (20); One of the connecting pieces (30) is connected to the conductive area of ​​the shell (10), and the other connecting piece (30) extends out of the shell (10) and is separated from the conductive area of ​​the shell (10). The conductive area of ​​the shell (10) and the connecting piece (30) extending out of the shell (10) are respectively used for connecting to an external circuit.

2. The battery (100) according to claim 1, characterized in that: The shell (10) comprises two detachable parts, and the conductive area of ​​the shell (10) is arranged on one part of the shell (10).

3. The battery (100) according to claim 2, characterized in that: At least one of the two parts of the shell (10) includes a bottom plate (10a) and a side plate (10b), and the conductive area of ​​the shell (10) is at least arranged on the side plate (10b) and is conductively connected to one of the connecting plates (30).

4. The battery (100) according to claim 2, characterized in that: The connecting piece (30) extending out of the housing (10) passes through a gap (13) between two parts of the housing (10).

5. The battery (100) according to claim 4, characterized in that: The invention also comprises an insulating member (40), wherein the insulating member (40) is at least partially located at the gap (13) and is located in a space formed by the connecting piece (30) extending out of the housing (10) and the gap (13).

6. The battery (100) according to claim 5, characterized in that: The insulating member (40) fills the space formed by the connecting piece (30) and the gap (13), and the insulating member (40) is also used to seal the gap (13).

7. The battery (100) according to any one of claims 1 to 6, characterized in that: It also comprises a sealing member (50), one end of which surrounds and is fixed to the end of the connecting piece (30) extending out of the shell (10), and the other end of which extends toward the shell (10) and is in contact with the outer surface of the shell (10).

8. The battery (100) according to any one of claims 1 to 6, characterized in that: The two electrodes (22) of the battery cell (20) are arranged at a distance from each other on the same side of the battery cell (20).

9. The battery (100) according to any one of claims 1 to 7, characterized in that: It also includes a positioning plate (60), the positioning plate (60) being received in the housing (10), the positioning plate (60) being provided with two through holes (61) spaced apart from each other, the two connecting sheets (30) respectively passing through one of the through holes (61) and being electrically connected to one of the electrodes (22).

10. The battery (100) according to any one of claims 5 to 9, characterized in that: The opposite ends of the insulating member (40) extend into the housing (10) and extend out of the housing (10) respectively.

11. The battery (100) according to any one of claims 4 to 10, characterized in that: The housing (10) is provided with a first protrusion (141) and a second protrusion (142), wherein the gap (13) is provided in the first protrusion (141).

12. The battery (100) according to claim 11, characterized in that: The housing (10) is provided with a recessed portion (15), and the first convex block (141) and the second convex block (142) are both arranged in the recessed portion (15).

13. The battery (100) according to any one of claims 1 to 12, characterized in that: The battery core (20) comprises a plurality of pole cores (21) provided with pole tabs (211), wherein the plurality of pole cores (21) comprise a plurality of positive pole cores (21a) and a plurality of negative pole cores (21b).

14. The battery (100) according to any one of claims 1 to 13, characterized in that: It also includes a plurality of fixing members (90), wherein the fixing members (90) are arranged on the outer edge of the housing (10) to fix the battery (100).

15. A battery module (1000), characterized in that: It comprises a battery tray (200) and a battery (100) according to any one of claims 1 to 14, wherein the battery (100) is accommodated in the battery tray.

16. A vehicle, characterized in that: Comprising the battery module according to claim 15.

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