Battery, power utilization device and energy storage device

Abstract

A battery, an electric device and an energy storage device, the battery comprising at least one battery cell (10), the battery cell (10) comprising a pole (101); a containing box (11), the containing box (11) is internally provided with a containing cavity, each battery monomer (10) is contained in the containing cavity, the containing box (11) comprises a box wall (111) and a sealing cover (112), the box wall (111) is provided with a through hole (113), and the sealing cover (112) is detachably installed on the box wall (111) and seals the through hole (113); and along the thickness direction of the box wall (111), at least part of the projection of the pole (101) falls into the range of the through hole (113). The interior of the battery is convenient to overhaul.

Description

Batteries, electrical devices and energy storage devices Technical Field

[0001] The present disclosure relates to the technical field of battery production, and in particular to a battery, an electrical device, and an energy storage device. Background Art

[0002] With the promotion and popularization of the green development concept, new energy batteries are being used more and more widely in life and industry. For example, new energy vehicles equipped with batteries have been widely used. In addition, batteries are also being increasingly used in energy storage fields.

[0003] Battery manufacturing requires more than just capacity. It also requires controlling battery charge and discharge, controlling operating temperature, and detecting operating status. Therefore, in addition to battery cells, the battery also includes electrical components such as busbars, sampling structures, battery management systems, and high-voltage distribution units.

[0004] However, components within batteries, such as busbars and electrical components, are prone to damage and require timely maintenance. Therefore, facilitating internal battery maintenance is a key industry need.

[0005] Summary of the Invention

[0006] In view of this, the embodiments of the present disclosure hope to provide a battery, an electrical device, and an energy storage device that can facilitate internal maintenance.

[0007] To achieve the above objectives, the technical solution of the embodiment of the present disclosure is implemented as follows:

[0008] In a first aspect, an embodiment of the present disclosure provides a battery, comprising: at least one battery cell, the battery cell comprising a pole; a storage box, the storage box having a storage cavity therein, each of the battery cells being accommodated in the storage cavity, the storage box comprising a box wall and a closing cover, the box wall being provided with a through hole, the closing cover being detachably mounted on the box wall and covering the through hole; along the thickness direction of the box wall, at least part of the projection of the pole falls within the range of the through hole.

[0009] The battery in the disclosed embodiment includes a storage box including a box wall with a through hole provided therein, which allows the interior of the battery to communicate with the outside world. Therefore, maintenance personnel can inspect the interior of the battery through the through hole. The storage box includes a closing cover that is detachably mounted on the box wall. When the closing cover is mounted on the through hole, it can close the through hole and isolate the storage cavity from the outside world, thereby reducing the impact of the external environment on the battery cells and allowing the battery cells to operate in a stable environment. When the closing cover is removed from the through hole, the interior of the battery communicates with the outside world through the through hole for inspection of the interior of the battery. Since at least part of the projection of the pole falls within the range of the through hole along the thickness direction of the box wall, maintenance personnel can directly inspect at least part of the pole through the through hole. Since the battery cells are housed in the storage cavity of the storage box, the storage box can protect the battery cells. Inspection can be carried out by simply removing and installing the closing cover. It is easy to use and has a simple structure.

[0010] In some embodiments, a box body with an opening at one end and a cover body for closing the opening of the box body are formed by the box wall of the accommodating box, and the through hole is opened in the box body and / or the cover body.

[0011] Because the walls of the storage box form a box with an opening at one end, the processed battery cells can be placed into the storage cavity through the opening during processing, and the battery cells and storage cavity can also be processed from the opening, facilitating the fulfillment of diverse processing needs. Because the walls of the storage box form a cover for closing the opening, the cover seals the box after processing, isolating the battery cells from the outside world, minimizing the impact of the external environment on the battery cells, and ensuring stable operation. Because through-holes can be provided in the box and / or the cover, this allows for applications where the battery cell terminals face the box and / or the cover.

[0012] In some embodiments, the battery further includes a busbar, which is used to connect poles of two battery cells. Along the thickness direction of the box wall, at least a portion of the projection of the busbar falls within the range of the through hole.

[0013] Because the battery also includes a busbar, the terminals of the battery cells can be connected via the busbar. Since the projection of the busbar along the thickness of the battery wall at least partially falls within the range of the through-hole, at least a portion of the busbar can be exposed to the outside through the through-hole, facilitating maintenance of the busbar.

[0014] In some embodiments, the battery further includes an electrical kit, which includes at least one of a sampling structure, a battery management system, a relay, and a high-voltage distribution unit. Along the thickness direction of the box wall, the projection of the electrical kit at least partially falls within the range of the through hole.

[0015] Because the battery also includes an electrical assembly, the projection of the electrical assembly along the thickness direction of the battery wall at least partially falls within the range of the through-hole. Therefore, at least a portion of the electrical assembly can be exposed to the outside through the through-hole, enabling maintenance of the electrical assembly. Because the electrical assembly includes at least one of a sampling structure, a battery management system, a relay, and a high-voltage power distribution unit, at least one of the sampling structure, the battery management system, the relay, and the high-voltage power distribution unit can be maintained through the through-hole.

[0016] In some embodiments, in the accommodating cavity, a plurality of the battery cells are arranged along a first direction to form a battery cell group, the first direction is perpendicular to the extension direction of the battery cells, and in the battery cell group, the poles are arranged along the first direction, the through holes are located at positions corresponding to the poles along the thickness direction of the box wall, and the projections of the poles along the thickness direction of the box wall and the projections of the electrical kit along the thickness direction of the box wall partially or completely fall within the range of the through holes.

[0017] By arranging the battery cells and terminals along the first direction, the terminals are positioned more regularly, and the through-holes are thus more regularly arranged. Because the projections of the terminals along the thickness direction of the box wall and the projections of the electrical assembly along the thickness direction of the box wall partially or completely fall within the range of the through-holes, at least portions of the terminals and the electrical assembly can be exposed to the outside through the through-holes, facilitating maintenance.

[0018] In some embodiments, in the accommodating cavity, a plurality of battery cell units are arranged along a first direction to form a battery cell group, and the battery cell unit includes two or more battery cells arranged in parallel along a second direction, the first direction is perpendicular to the extension direction of the battery cell, the second direction is perpendicular to the first direction, and the two battery cells adjacent along the second direction are arranged in parallel with the poles close to each other or with the poles far away from each other, and, in the battery cell group, the poles are arranged along the first direction, the through-holes are located at positions corresponding to the poles along the thickness direction of the box wall, and the projections of the poles along the thickness direction of the box wall and the projections of the electrical kit along the thickness direction of the box wall partially or completely fall within the range of the through-holes.

[0019] Since two battery cells adjacent to each other along the second direction are arranged with their poles close to each other, the arrangement of the poles is relatively concentrated. Therefore, the through holes corresponding to the poles can be opened more concentratedly, and the through holes located in similar positions can be integrated into one through hole, thereby saving the process of setting through holes and closing covers. Since two battery cells adjacent to each other along the second direction are arranged with their poles far from each other, the arrangement of the poles located on the same side of the battery cells in the second direction is relatively concentrated. Therefore, through holes can be opened separately, and the through holes corresponding to the poles on the same side can be integrated into one through hole, thereby saving the process of setting through holes and closing covers. Since the projections of the poles along the thickness direction of the box wall and the projections of the electrical kit along the thickness direction of the box wall partially or completely fall within the range of the through holes, at least a portion of the poles and the electrical kit can be exposed to the outside through the through holes for easy maintenance.

[0020] In some embodiments, a length dimension of the battery cell group in a second direction is in a range of 800 mm to 1200 mm, and the second direction is perpendicular to the first direction.

[0021] Therefore, the length of the battery cell group in the second direction does not exceed the size of the installation space reserved for the electrical device and can meet the size required for carrying the amount of electricity.

[0022] In some embodiments, the battery cell unit includes two battery cells, and a length dimension of the battery cells in each battery cell unit in the second direction is in a range from 350 mm to 700 mm.

[0023] Therefore, the size of the battery cell unit composed of the battery cells in the second direction does not exceed the size of the installation space reserved for the electrical device, and can meet the size required for carrying the amount of electricity.

[0024] In some embodiments, there are multiple through holes, and one or more closing covers are provided corresponding to each through hole.

[0025] Thus, through-holes can be set at locations other than the poles that require maintenance, meeting the various maintenance location requirements of the battery cells. The closure cover is set corresponding to the through-hole, isolating the battery from the external environment when not being maintained, allowing the battery to operate in a closed and stable environment.

[0026] In some embodiments, the projected area of ​​the through hole along the thickness direction of the box wall does not exceed 30% of the projected area of ​​the box wall where the through hole is formed along the thickness direction of the box wall.

[0027] By limiting the area of ​​the through hole to 30% of the area of ​​the box wall where the through hole is provided, the maintenance requirements for at least part of the poles can be met while preventing the through hole from being too large in area and affecting the structural strength of the box wall.

[0028] In some embodiments, the length of the through hole along the first direction is greater than or equal to the length of the accommodating cavity along the first direction, or the length of the through hole along the second direction is greater than or equal to the length of the accommodating cavity along the second direction, wherein the first direction is perpendicular to the extension direction of the battery cell, and the second direction is perpendicular to the first direction.

[0029] Because the length of the through hole along the first direction is greater than or equal to the length of the accommodating cavity along the first direction, the through hole can expose at least a portion of each battery cell arranged in the first direction. Alternatively, because the length of the through hole along the second direction is greater than or equal to the length of the accommodating cavity along the second direction, the through hole can expose at least a portion of each battery cell arranged in the second direction.

[0030] In some embodiments, the length of the through hole along the first direction is no greater than 500 mm.

[0031] In this way, the maintenance requirements for at least part of the poles can be met, and the structural strength of the box wall can be prevented from being affected by an excessively large area of ​​the through hole.

[0032] In some embodiments, a length of the through hole along the first direction is in a range from 50 mm to 300 mm.

[0033] Thus, a relatively suitable through-hole size range is provided, which can not only meet the maintenance requirements of at least part of the poles, but also avoid the through-hole area being too large to affect the structural strength of the box wall.

[0034] In some embodiments, a sealing member is provided around the through hole, and the sealing member is used to seal between the through hole and the closing cover.

[0035] As a result, the closing cover and the through hole can maintain a relatively tight sealing effect, preventing external dust and liquid from entering the accommodating cavity and damaging the battery cell.

[0036] In some embodiments, the closing cover is mounted on the box wall by screws, or the closing cover is slidably engaged with the box wall, or the closing cover is hinged to the box wall.

[0037] The closure cover is fixed to the box wall with screws, which are relatively secure. Removal is achieved by simply turning the screws, resulting in a simple structure and convenient operation, saving time and effort. The closure cover can be slidably engaged with the box wall, making it easy to slide and quickly remove. The closure cover is hinged to the box wall, allowing partial removal by turning the cover, saving effort and making removal quick.

[0038] In some embodiments, the box wall in which the through hole is formed has a boss, which is formed by the box wall bulging in a direction away from the battery cell, and the through hole is opened on the wall surface of the boss facing the battery cell, and the boss forms a receiving portion on the side facing the battery cell, and at least a portion of the electrical kit is located in the receiving portion.

[0039] Because the boss is formed by the box wall protruding away from the battery cell, there is space inside the boss to accommodate the portion of the battery cell that protrudes from the surface. Because the through-hole is provided in the wall of the boss facing the battery cell, at least a portion of the terminal is accommodated in the accommodating portion. Since at least a portion of the electrical assembly is located in the accommodating portion, the space occupied by the electrical assembly in the accommodating cavity is reduced, which helps to reduce the volume of the accommodating box.

[0040] In some embodiments, the closing cover mounted on the box wall is configured to be convex relative to the box wall, and the closing cover forms a receiving space on a side facing the battery cell, and at least a portion of the electrical kit is located in the receiving space via the through hole.

[0041] As a result, at least a portion of the electrical assembly is placed within the accommodating space of the cover, reducing the space occupied by the electrical assembly within the accommodating cavity and thus helping to reduce the volume of the container. Furthermore, the accommodating space of the cover and the accommodating portion of the boss can overlap to form a larger space, capable of accommodating more terminals and electrical assemblies, further reducing the space occupied by the protruding portions of the battery cells within the accommodating cavity.

[0042] In some embodiments, the closing cover is configured as a flat plate.

[0043] Therefore, the structure is simple and easy to process.

[0044] In some embodiments, part or all of the pole and the electrical kit are located in the receiving portion.

[0045] As a result, the space occupied by at least part of the poles and the electrical assembly in the accommodating cavity is reduced, which helps to reduce the volume of the accommodating box.

[0046] In some embodiments, a protrusion is provided on the battery cell, the pole is provided on a surface of the protrusion facing the through hole, and at least a portion of the protrusion is located in the accommodating portion.

[0047] By arranging a protrusion on the battery cell, the pole can be separated from the surface of the battery cell, and other components can be further arranged on the surface of the battery cell. The other components do not interfere with the pole, thereby reducing the risk of the pole being connected and conducting electricity with other components on the battery surface; the height of the pole in the first direction can also be increased without reducing the strength of the pole, so as to facilitate providing a heat exchange component accommodating space of appropriate height as needed.

[0048] In some embodiments, the electrode column includes a positive electrode column and a negative electrode column, and the positive electrode column and the negative electrode column are arranged on the protrusion at intervals.

[0049] By arranging the positive electrode column and the negative electrode column at intervals on the protrusion, the positive electrode column and the negative electrode column are relatively independent and do not interfere with each other, thereby reducing the risk of short circuit between the two.

[0050] In some embodiments, the number of the protrusion is one, the positive electrode column and the negative electrode column are spaced apart from each other on the protrusion, the line connecting the positive electrode column and the negative electrode column is parallel to the extension direction of the battery cell, or the line connecting the positive electrode column and the negative electrode column is perpendicular to the extension direction of the battery cell.

[0051] The positive and negative electrode posts are located on the same protrusion. Arranging the positive and negative electrode posts with the line connecting them parallel to the extension direction of the battery cell, or with the line connecting them perpendicular to the extension direction of the battery cell, creates a more regular arrangement and facilitates later maintenance. Furthermore, the protrusion area used to house the two posts is larger, which helps to improve the strength of the post-mounting area in the battery cell.

[0052] In some embodiments, at least two of the protrusions are spaced apart from each other, the positive electrode column is provided on one of the protrusions, and the negative electrode column is provided on the other of the protrusions.

[0053] Since at least two protrusions are provided, and the positive electrode column and the negative electrode column are respectively provided on different protrusions, there is a large distance between the positive electrode column and the negative electrode column, so that the two can be relatively independent and do not interfere with each other, reducing the risk of short circuit between the two.

[0054] In a second aspect, an embodiment of the present disclosure further provides an electrical device, comprising the battery of any one of the aforementioned embodiments, wherein the battery serves as a power source for the electrical device.

[0055] Since the electrical device includes an easily accessible internal battery, when the electrical device malfunctions, the battery can be quickly inspected by removing the cover. Once the inspection is complete, the cover can be replaced to restore the device to its original state. This saves time and effort, and reduces the maintenance burden on workers.

[0056] In some embodiments, the electrical device is a vehicle, which includes at least one seat, a portion of the battery box wall constitutes the floor of the vehicle, the seat is arranged on the floor, the through hole is set through the floor, the closing cover is detachably mounted on the floor, and covers the through hole, and the projection of the seat on the battery along the up and down direction of the vehicle is outside the range of the through hole.

[0057] Because a portion of the battery's casing forms the vehicle's floor, it saves space in the vehicle's vertical direction, helping to increase the battery's energy density. Because through-holes penetrate the floor, exposing the battery cells, and the seat's vertical projection onto the battery is outside the through-holes, the seats do not obstruct the through-holes. For maintenance, there's no need to remove the seat; the battery can be inspected directly from inside the vehicle, saving time and effort. By removably attaching a closure cover to the floor and sealing the through-holes, the battery cells are isolated from the vehicle's interior, providing both dust and water protection and preventing direct contact between the user and the battery cells, reducing the risk of electric shock.

[0058] In some embodiments, the electrical device is a vehicle, which includes a floor and at least one seat, the battery is located on one side of the floor along the up-down direction of the vehicle, the seat is located on the other side of the floor along the up-down direction of the vehicle, and the through hole of the battery faces the other side of the up-down direction of the vehicle, and the projection of the seat on the battery along the up-down direction of the vehicle is outside the range of the through hole.

[0059] Because the through-holes penetrate the floor and the wall, and the seat's projection onto the battery in the vertical direction of the vehicle is outside the through-holes, the seat does not obstruct the through-holes. During maintenance, there is no need to remove the seat, allowing direct access to the battery from inside the vehicle, saving time and effort. By removably attaching a cover to the floor and sealing the through-holes, the battery cells are isolated from the vehicle interior, preventing direct contact between the user and the battery cells and reducing the risk of electric shock.

[0060] In some embodiments, the vehicle includes at least one seat row, the seat row includes at least two seats arranged along the left-right direction of the vehicle, and along the left-right direction of the vehicle, the through hole is located between adjacent seats in the same seat row, and / or the through hole is located on both sides of the same seat row in the left-right direction of the vehicle.

[0061] Therefore, when maintenance is carried out through the through hole, the seat does not block the through hole, which is convenient for maintenance and does not require the seat to be disassembled, and has little impact on the interior of the vehicle.

[0062] In a third aspect, the present disclosure further provides an energy storage device, comprising the battery as described above, wherein the battery is configured to store and provide electrical energy.

[0063] Because the energy storage device includes easily accessible internal batteries, when the device malfunctions, the battery can be quickly inspected by removing the cover. Once the inspection is complete, the cover can be replaced to restore the device to its original state. This saves time and effort, and reduces the maintenance burden on workers. BRIEF DESCRIPTION OF THE DRAWINGS

[0064] FIG1 is a schematic diagram of a battery cell with poles provided on both sides in a second direction in one embodiment of the present disclosure;

[0065] FIG2 is a schematic diagram of a battery cell with a terminal in the middle according to an embodiment of the present disclosure;

[0066] FIG3 is a schematic diagram of a battery cell with a protrusion in the middle according to an embodiment of the present disclosure;

[0067] FIG4 is a schematic diagram of battery cells arranged along a first direction with poles provided on both sides of a second direction in one embodiment of the present disclosure;

[0068] FIG5 is a schematic diagram of battery cells with protrusions in the middle arranged along a first direction in one embodiment of the present disclosure;

[0069] FIG6 is an exploded view of a structure with a protrusion, a busbar, and an electrical assembly in the middle in one embodiment of the present disclosure;

[0070] FIG7 is a schematic diagram of battery cells arranged along a first direction with protrusions on both sides in a second direction according to an embodiment of the present disclosure;

[0071] FIG8 is a schematic diagram of battery cells arranged along a first direction with protrusions and current busbars provided on both sides in a second direction according to an embodiment of the present disclosure;

[0072] FIG9 is a schematic diagram of a battery cell placed in a box in one embodiment of the present disclosure;

[0073] FIG10 is an exploded view of a battery with a through hole formed in the cover according to an embodiment of the present disclosure;

[0074] FIG11 is an exploded view of a battery with a through hole formed in a casing according to an embodiment of the present disclosure;

[0075] FIG12 is an exploded view of a battery with two through holes and a boss formed in the cover according to an embodiment of the present disclosure;

[0076] FIG13 is a schematic diagram showing a closure cover slidably engaged with a box wall in one embodiment of the present disclosure;

[0077] FIG14 is a schematic diagram of a closure cover mounted on a box wall by screws in one embodiment of the present disclosure;

[0078] FIG15 is a schematic diagram of a closure cover hinged to a box wall in one embodiment of the present disclosure;

[0079] FIG16 is an exploded view of a closure cover hinged to a box wall in one embodiment of the present disclosure;

[0080] FIG17 is an exploded view of a battery provided with a heat exchange assembly according to an embodiment of the present disclosure;

[0081] FIG18 is a side view of FIG17 according to an embodiment of the present disclosure;

[0082] FIG19 is a top view of FIG17 according to an embodiment of the present disclosure;

[0083] FIG20 is a cross-sectional view along the AA direction of FIG19 in one embodiment of the present disclosure;

[0084] FIG21 is a partial enlarged view of portion B in FIG20 in one embodiment of the present disclosure;

[0085] FIG22 is an exploded view of the arrangement of the boss corresponding to the electrical assembly in one embodiment of the present disclosure;

[0086] FIG23 is a schematic diagram showing a closure cover configured as a convex shape in one embodiment of the present disclosure;

[0087] FIG24 is a side view of a battery provided with a boss according to an embodiment of the present disclosure;

[0088] FIG25 is a cross-sectional view along the CC direction of FIG24 in one embodiment of the present disclosure;

[0089] FIG26 is a partial enlarged view of portion D in FIG25 according to an embodiment of the present disclosure;

[0090] FIG27 is a schematic diagram of a battery installed in a vehicle according to an embodiment of the present disclosure;

[0091] FIG28 is a schematic diagram of a battery with a boss installed on a vehicle according to an embodiment of the present disclosure;

[0092] FIG29 is a schematic diagram of FIG28 from another perspective according to an embodiment of the present disclosure;

[0093] FIG30 is a top view of a battery with a boss installed on a vehicle according to an embodiment of the present disclosure;

[0094] FIG31 is a cross-sectional view along the EE direction of FIG30 in one embodiment of the present disclosure.

[0095] Explanation of the reference numerals: 10, battery cell; 101, pole; 102, protrusion; 11, storage box; 111, box wall; 1111, box body; 1112, cover body; 1113, boss; 112, closing cover; 113, through hole; 114, seal; 12, busbar; 13, electrical kit; 14, heat exchange component; 15, seat; X, first direction; Y, second direction (left and right direction of the vehicle); Z, up and down direction of the vehicle. DETAILED DESCRIPTION

[0096] It should be noted that, unless there is a conflict, the embodiments and technical features in the embodiments of the present disclosure can be combined with each other, and the detailed description in the specific implementation methods should be understood as an explanation of the purpose of the present disclosure and should not be regarded as an improper limitation on the present disclosure.

[0097] Unless otherwise defined, all technical and scientific terms used herein have the same meanings as commonly understood by those skilled in the art to which the present disclosure belongs; the terms used herein are only for the purpose of describing specific embodiments and are not intended to limit the present disclosure; the terms "including" and "having" and any variations thereof in the specification of the present disclosure and the above-mentioned drawings are intended to cover non-exclusive inclusions.

[0098] Currently, new energy batteries are increasingly being used in daily life and industry. They are not only used in energy storage systems such as hydropower, thermal power, wind power, and solar power plants, but are also widely used in electric vehicles such as electric bicycles, electric motorcycles, and electric cars, as well as in aerospace and other fields.

[0099] FIG27 is a schematic diagram of the structure of a vehicle provided in accordance with an embodiment of the present disclosure. The vehicle may be a fuel vehicle, a gas vehicle, or a new energy vehicle. The new energy vehicle may be a pure electric vehicle, a hybrid vehicle, or an extended-range vehicle, among others. A battery is provided inside the vehicle, and the battery may be located at the bottom, head, or tail of the vehicle. The battery may be used to power the vehicle, for example, the battery may serve as an operating power source for the vehicle. The vehicle may also include a controller and a motor, the controller being used to control the battery to power the motor, for example, to meet the vehicle's power requirements for starting, navigating, and driving.

[0100] In some embodiments of the present disclosure, the battery can serve not only as the operating power source of the vehicle, but also as the driving power source of the vehicle, replacing or partially replacing fuel or natural gas to provide driving power for the vehicle.

[0101] In the embodiments of the present disclosure, the battery may be a battery cell. A battery cell refers to a basic unit that can realize the mutual conversion of chemical energy and electrical energy, and can be used to make a battery module or battery pack, thereby being used to supply power to an electrical device. The battery cell may be a secondary battery, which refers to a battery cell that can be recharged to activate the active material after the battery cell is discharged and continue to be used. The battery cell may be a lithium-ion battery, a sodium-ion battery, a sodium-lithium-ion battery, a lithium metal battery, a sodium metal battery, a lithium-sulfur battery, a magnesium-ion battery, a nickel-metal hydride battery, a nickel-cadmium battery, a lead-acid battery, etc., and the embodiments of the present disclosure are not limited to this.

[0102] A battery cell typically includes an electrode assembly. This assembly includes a positive electrode, a negative electrode, and a separator. During the charge and discharge process of a battery cell, active ions (such as lithium ions) are inserted and removed between the positive and negative electrodes. The separator, placed between the positive and negative electrodes, prevents short circuits between the positive and negative electrodes while allowing the active ions to pass through.

[0103] In some embodiments, the battery cell further includes an electrolyte, which acts as a conductor of ions between the positive and negative electrodes. The present disclosure does not specifically limit the type of electrolyte, and the electrolyte may be selected based on needs. The electrolyte may be liquid, gel, or solid.

[0104] In some embodiments, a battery cell may include a housing. The housing is used to encapsulate components such as the electrode assembly and the electrolyte. The housing may be a steel housing, an aluminum housing, a plastic housing (e.g., polypropylene), a composite metal housing (e.g., a copper-aluminum composite housing), or an aluminum-plastic film.

[0105] As an example, the battery cell can be a cylindrical battery cell, a prismatic battery cell, a soft-pack battery cell or a battery cell of other shapes. The prismatic battery cell includes a square-shell battery cell, a blade-shaped battery cell, a polygonal battery, such as a hexagonal battery, etc. There is no special limitation in the present disclosure.

[0106] In some embodiments, the housing includes an end cap and a shell. The shell has an opening, and the end cap closes the opening to form a sealed space for accommodating the electrode assembly, electrolyte, and other substances. The shell may have one or more openings. One or more end caps may also be provided.

[0107] In the embodiments of the present disclosure, the battery may also be a single physical module (e.g., a battery module or battery pack) including one or more battery cells to provide higher voltage and capacity. When there are multiple battery cells, the multiple battery cells are connected in series, in parallel, or in hybrid via a busbar.

[0108] As an example, the battery cell can be a cylindrical battery cell, a prismatic battery cell, a soft-pack battery cell or a battery cell of other shapes. The prismatic battery cell includes a square-shell battery cell, a blade-shaped battery cell, a polygonal battery, such as a hexagonal battery, etc. There is no special limitation in the present disclosure.

[0109] In the embodiments of the present disclosure, the battery may also be a single physical module (e.g., a battery module or battery) including one or more battery cells to provide higher voltage and capacity. When there are multiple battery cells, the multiple battery cells are connected in series, in parallel, or in hybrid via a busbar.

[0110] In the description of the embodiments of the present disclosure, technical terms such as "first," "second," and "third" are used solely to distinguish different objects and should not be understood to indicate or imply relative importance or to implicitly specify the quantity, specific order, or primary and secondary relationship of the technical features indicated. In the description of the embodiments of the present disclosure, "plurality" means more than two, unless otherwise specifically defined.

[0111] References herein to "embodiments" mean that a particular feature, structure, or characteristic described in connection with the embodiments may be included in at least one embodiment of the present disclosure. The appearance of this phrase in various places in the specification does not necessarily refer to the same embodiment, nor does it constitute an independent or alternative embodiment that is mutually exclusive of other embodiments. It is understood, both explicitly and implicitly, by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0112] In the description of the embodiments of the present disclosure, the term "and / or" is simply a description of the association relationship between associated objects, indicating that three relationships can exist. For example, A and / or B can represent three situations: A exists alone, A and B exist simultaneously, and B exists alone. In addition, the character " / " in this document generally indicates that the associated objects are in an "or" relationship.

[0113] In the description of the embodiments of the present disclosure, for the sake of convenience, as shown by the arrows in Figures 17 and 27, the direction of arrow X is the first direction and the vehicle's driving direction, the direction of arrow Y is the second direction and the vehicle's left and right direction, and the direction of arrow Z is the vehicle's up and down direction. The direction indicated by arrow Z along the vertical direction is called "up", and the opposite direction is called "down".

[0114] In the description of the embodiments of the present disclosure, unless otherwise expressly specified or limited, technical terms such as "installed," "connected," "connect," and "fixed" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integration; mechanical connections or electrical connections; direct connections or indirect connections through an intermediate medium; and can refer to internal connectivity between two components or interaction between two components. Those skilled in the art can understand the specific meanings of the above terms in the embodiments of the present disclosure based on specific circumstances.

[0115] In the description of the embodiments of the present disclosure, unless otherwise clearly specified and limited, the technical term "contact" should be understood in a broad sense, and can be direct contact, contact through an intermediate medium layer, contact with essentially no interaction force between the two contacting parties, or contact with interaction force between the two contacting parties.

[0116] The following describes the embodiments of the present disclosure in detail.

[0117] With the promotion and popularization of the green development concept, new energy batteries are being used more and more widely in life and industry. For example, new energy vehicles equipped with batteries have been widely used. In addition, batteries are also being increasingly used in energy storage fields.

[0118] Battery manufacturing requires more than just capacity. It also requires controlling battery charge and discharge, controlling operating temperature, and detecting operating status. Therefore, in addition to battery cells, the battery also includes electrical components such as busbars, sampling structures, battery management systems, and high-voltage distribution units.

[0119] However, components within batteries, such as busbars and electrical components, are prone to damage and require timely maintenance. Therefore, facilitating internal battery maintenance is a key industry need.

[0120] The inventors of the present disclosure hope to develop a structure that facilitates battery maintenance, thereby simplifying the battery maintenance steps and improving the battery maintenance efficiency.

[0121] Based on such a design concept, the inventors of the present disclosure designed a battery, comprising: at least one battery cell, each battery cell including a pole; a storage box, a storage cavity provided in the storage box, each battery cell being accommodated in the storage cavity, the storage box comprising a box wall and a closing cover, the box wall being provided with a through hole, the closing cover being detachably mounted on the box wall and covering the through hole; along the thickness direction of the box wall, at least part of the projection of the pole falls within the range of the through hole.

[0122] Because the storage box includes a wall with a through-hole provided therein, allowing the interior of the battery to communicate with the outside world, maintenance personnel can access the battery's interior through the through-hole. The storage box also includes a closure cover that is removably mounted to the wall. When the closure cover is mounted on the through-hole, it seals the through-hole, isolating the storage chamber from the outside world, thereby minimizing the impact of the external environment on the battery cells and allowing the battery cells to operate in a stable environment. When the closure cover is removed from the through-hole, the battery interior communicates with the outside world through the through-hole, allowing for maintenance of the battery's interior. Because at least a portion of the projection of the battery post along the thickness of the box wall falls within the through-hole, maintenance personnel can directly access at least a portion of the battery post through the through-hole. Since the battery cells are housed within the storage chamber of the storage box, the storage box protects the battery cells. Maintenance can be performed by simply removing and installing the closure cover, making it convenient to use and having a simple structure.

[0123] The following is a description with reference to the accompanying drawings.

[0124] FIG1 is a schematic diagram of a battery cell with poles on both sides in the second direction according to an embodiment of the present disclosure; FIG2 is a schematic diagram of a battery cell with poles in the middle according to an embodiment of the present disclosure; FIG3 is a schematic diagram of a battery cell with a protrusion in the middle according to an embodiment of the present disclosure; FIG4 is a schematic diagram of a battery cell with poles on both sides in the second direction according to an embodiment of the present disclosure arranged along the first direction; FIG5 is a schematic diagram of a battery cell with a protrusion in the middle according to an embodiment of the present disclosure arranged along the first direction; FIG6 is an exploded view of a battery cell with a protrusion in the middle, a busbar and an electrical kit according to an embodiment of the present disclosure; FIG7 is a schematic diagram of a battery cell with protrusions on both sides in the second direction according to an embodiment of the present disclosure Schematic diagram of battery cells arranged along a first direction; FIG8 is a schematic diagram of battery cells arranged along a first direction with protrusions and a busbar on both sides in a second direction in an embodiment of the present disclosure; FIG9 is a schematic diagram of battery cells placed in a box body in an embodiment of the present disclosure; FIG10 is an exploded diagram of a battery with a through hole in a cover body in an embodiment of the present disclosure; FIG11 is an exploded diagram of a battery with a through hole in a box body in an embodiment of the present disclosure; FIG12 is an exploded diagram of a battery with two through holes and a protrusion in a cover body in an embodiment of the present disclosure; FIG13 is a schematic diagram of a closing cover slidably connected to a box wall in an embodiment of the present disclosure; FIG14 is a schematic diagram of a closing cover installed by screws in an embodiment of the present disclosure 15 is a schematic diagram of a closure cover hinged to a box wall in one embodiment of the present disclosure; FIG16 is an exploded view of a closure cover hinged to a box wall in one embodiment of the present disclosure; FIG17 is an exploded view of a battery provided with a heat exchange assembly in one embodiment of the present disclosure; FIG18 is a side view of FIG17 in one embodiment of the present disclosure; FIG19 is a top view of FIG17 in one embodiment of the present disclosure; FIG20 is a sectional view along the AA direction of FIG19 in one embodiment of the present disclosure; FIG21 is a partial enlarged view of part B in FIG20 in one embodiment of the present disclosure; FIG22 is an exploded view of the arrangement of the boss corresponding to the electrical kit in one embodiment of the present disclosure; FIG23 is an exploded view of the closure cover structure in one embodiment of the present disclosure FIG24 is a schematic diagram of a battery provided with a boss in an embodiment of the present disclosure; FIG25 is a sectional view along the CC direction of FIG24 in an embodiment of the present disclosure; FIG26 is a partial enlarged view of part D in FIG25 in an embodiment of the present disclosure; FIG27 is a schematic diagram of a battery installed on a vehicle in an embodiment of the present disclosure; FIG28 is a schematic diagram of a battery provided with a boss in an embodiment of the present disclosure installed on a vehicle; FIG29 is a schematic diagram of FIG28 in another perspective in an embodiment of the present disclosure; FIG30 is a top view of a battery provided with a boss in an embodiment of the present disclosure installed on a vehicle; FIG31 is a sectional view along the EE direction of FIG30 in an embodiment of the present disclosure.

[0125] In a first aspect, as shown in FIG10 , the present disclosure provides a battery, comprising: at least one battery cell 10, the battery cell 10 including a pole 101; a storage box 11, the storage box 11 having a storage cavity, each battery cell 10 being accommodated in the storage cavity, the storage box 11 comprising a box wall 111 and a closing cover 112, the box wall 111 having a through hole 113, the closing cover 112 being detachably mounted on the box wall 111 and covering the through hole 113; along the thickness direction of the box wall 111, at least part of the projection of the pole 101 falls within the range of the through hole 113.

[0126] The containing box 11, that is, the box body 1111 forming the outer contour of the battery, is used to accommodate other components of the battery except the containing box 11, thereby providing installation and fixing space for other components. At the same time, it plays a role of sealing and protection, and reduces the adverse effects of collisions with external objects and entry of foreign matter on the normal operation of the battery during the transportation and use of the battery.

[0127] Box walls 111 refer to the walls of the container 11 that enclose the container cavity. Each pair of walls is spaced apart and faces each other, with the cavity between them and the outside of the two walls facing away from each other. In other words, of the two opposing surfaces of each box wall 111, one forms the inner wall of the cavity, while the other forms the outer surface of the container 11.

[0128] The pole 101 is provided on the surface of the battery cell 10 and is used to electrically connect to the components in the battery cell 10 that realize electrochemical reactions, so as to output or input electric energy into or out of the battery cell 10 through the pole 101 .

[0129] The thickness direction of the box wall 111 is the direction in which the box wall 111 is away from the accommodating cavity.

[0130] The storage box 11 includes a box wall 111. Optionally, the box wall 111 is constructed as a hollow box body 1111. Each of the six wall surfaces of the box body 1111 is provided with through holes 113. For example, six plate-like surfaces are spliced ​​together to form the box wall 111, and the six plate-like surfaces enclose a storage cavity. Alternatively, the box body 1111 with an open end is connected to a cover body 1112 that closes the opening to form the box wall 111, and the storage cavity is enclosed between the cover 112 and the box body 1111.

[0131] Alternatively, the box wall 111 is constructed as a box body 1111 with an open end, and the box body 1111 has a receiving cavity therein, and the battery cell 10 placed in the receiving cavity is exposed to the outside. When the battery is installed in an electrical device, a portion of the electrical device forms a cover 1112 that closes the opening, thereby sealing the receiving cavity.

[0132] As shown in Figures 1, 2, and 4, the battery cell 10 is constructed in the form of a rectangular parallelepiped, with the extension direction of the battery cell 10 parallel to the longest side of the battery cell 10. A terminal post 101 is provided on the surface of the battery cell 10. When there is only one battery cell 10, the terminal post 101 can be located on any surface of the battery cell 10. When there are two battery cells 10, the two battery cells 10 can be arranged along a first direction X or a second direction Y. No terminal post 101 is provided on adjacent surfaces of the two battery cells 10. Instead, the terminal post 101 is located in the space between each battery cell 10 and the box wall 111. When there are multiple battery cells 10, the multiple battery cells 10 are arranged along the first direction X and / or the second direction Y. No terminal post 101 is provided between any two adjacent battery cells 10. Instead, the terminal post 101 is located in the space between each battery cell 10 and the box wall 111. The first direction X is perpendicular to the extension direction of the battery cell 10, and the second direction Y is parallel to the extension direction of the battery cell 10.

[0133] The storage box 11 also includes a closing cover 112. A through hole 113 can be provided on any surface of the storage box 11. The through hole 113 is provided through the box wall 111, so that the storage cavity and the outside are interconnected, thereby exposing a portion of the battery cell 10 placed in the storage cavity to the outside. A closing cover 112 is provided at the through hole 113. The size of the closing cover 112 is not smaller than the through hole 113. The closing cover 112 is installed on the surface of the box wall 111 provided with the through hole 113, so that the closing cover 112 completely covers and closes the through hole 113. Furthermore, the closing cover 112 is detachably mounted on the box wall 111. The closing cover 112 can be mounted on the box wall 111 by means of screws, magnetism, etc. It can be understood that the specific number of through holes 113 provided in the storage box 11 is not limited, and can be one or more.

[0134] Along the thickness direction of the box wall 111, the projection of the pole 101 can partially fall within the range of the through hole 113, so that the pole 101 falling within the range of the through hole 113 can be exposed to the outside world for easy maintenance. Along the thickness direction of the box wall 111, the projection of the pole 101 can completely fall within the range of the through hole 113, so that all the poles 101 can be exposed to the outside world for easy maintenance.

[0135] Because the storage box 11 includes a box wall 111, a through hole 113 is provided on the box wall 111, allowing the interior of the battery to communicate with the outside world. Therefore, maintenance personnel can perform internal maintenance of the battery through the through hole 113. The storage box 11 includes a closure cover 112, which is removably mounted on the box wall 111. When the closure cover 112 is mounted on the through hole 113, it can seal the through hole 113 and isolate the storage chamber from the outside world, thereby reducing the impact of the external environment on the battery cell 10 and allowing the battery cell 10 to operate in a stable environment. When the closure cover 112 is removed from the through hole 113, the interior of the battery communicates with the outside world through the through hole 113, allowing for maintenance of the battery interior. Because at least a portion of the projection of the terminal 101 along the thickness direction of the box wall 111 falls within the range of the through hole 113, maintenance personnel can directly access at least a portion of the terminal 101 through the through hole 113. Since the battery cell 10 is accommodated in the accommodating cavity of the accommodating box 11, the accommodating box 11 can protect the battery cell 10. Maintenance can be carried out by simply disassembling the closing cover 112, which is convenient to use and has a simple structure.

[0136] In some embodiments, as shown in Figures 10 to 12, Figure 17, and Figure 22, a box body 1111 having an opening at one end and a cover body 1112 for closing the opening of the box body 1111 are formed by the box wall 111 of the accommodating box 11, and a through hole 113 is opened in the box body 1111 and / or the cover body 1112.

[0137] The box wall 111 forms the box body 1111 and the lid 1112. The box body 1111, which is open at one end, is composed of five rectangular plate-like surfaces. The four plate-like surfaces are arranged perpendicularly around one plate-like surface, forming the box body 1111 with an open end and a receiving cavity. The lid 1112 covers the opening of the box body 1111 and can seal it. The through hole 113 can be provided on any of the five surfaces of the box body 1111, or on the lid 1112.

[0138] Because the wall 111 of the storage box 11 forms a box body 1111 with an opening at one end, during processing, the processed battery cell 10 can be placed in the storage cavity from the opening, and the battery cell 10 and the storage cavity can also be processed from the opening, which facilitates meeting diverse processing needs. Because the wall 111 of the storage box 11 forms a cover 1112 for closing the opening, after processing, the cover 1112 is used to close the box body 1111, isolating the battery cell 10 from the outside world, reducing the impact of the external environment on the battery cell 10, and allowing the battery cell 10 to operate in a stable environment. Because the through hole 113 can be opened in the box body 1111 and / or the cover body 1112, it is suitable for situations where the pole 101 of the battery cell 10 faces the box body 1111 and / or the cover body 1112.

[0139] In some embodiments, as shown in Figures 8, 21, and 26, the battery also includes a busbar 12, which is used to connect the poles 101 of two battery cells 10. Along the thickness direction of the box wall 111, at least part of the projection of the busbar 12 falls within the range of the through hole 113.

[0140] The busbar 12 is used to electrically connect the plurality of battery cells 10 so as to realize series or parallel connection between the battery cells 10 .

[0141] It should be noted that the specific structure of the busbar 12 and the manner of realizing series and parallel connection between the battery cells 10 have been applied in the relevant technology and will not be described in detail here.

[0142] The plurality of battery cells 10 are arranged along a first direction X and / or a second direction Y. The surfaces between each two adjacent battery cells 10 are not provided with a terminal post 101. Similarly, the surfaces between each two adjacent battery cells 10 are not provided with a busbar 12. The busbar 12 is provided between the surfaces of the battery cells 10 and the box wall 111. Specifically, the busbar 12 is provided on the surface of the battery cells 10 on which the terminal post 101 is provided.

[0143] Along the thickness direction of the box wall 111, the projection of the current collector 12 can be partially within the range of the through hole 113, so that the part of the current collector 12 that falls within the range of the through hole 113 can be exposed to the outside for easy maintenance. Along the thickness direction of the box wall 111, the projection of the current collector 12 can be partially within the range of the through hole 113, so that the part of the current collector 12 that falls within the range of the through hole 113 can be exposed to the outside for easy maintenance.

[0144] Because the battery also includes a busbar 12, the terminals 101 of the battery cells 10 can be connected via the busbar 12. Since the projection of the busbar 12 along the thickness direction of the box wall 111 at least partially falls within the range of the through hole 113, at least a portion of the busbar 12 can be exposed to the outside through the through hole 113, facilitating maintenance of the busbar 12.

[0145] In some embodiments, as shown in Figures 6, 9, 12, 17, 18, 21, 22 and 26, the battery also includes an electrical kit 13, which includes at least one of a sampling structure, a battery management system, a relay, and a high-voltage distribution unit. Along the thickness direction of the box wall 111, the projection of the electrical kit 13 at least partially falls within the range of the through hole 113.

[0146] The electrical kit 13 is a variety of electrical components in the battery that are used to control the input or output of electrical energy into or out of the battery.

[0147] The battery management system is used to manage and control each electrical device in each battery, monitor the operating status of the battery, and adopt appropriate control strategies based on its operating status to prevent the battery from overcharging and over-discharging, thereby extending the battery life.

[0148] When the battery in the electrical device needs to be charged or discharged, the relay responds to the instructions of the power system to open or close the connection between the battery and other electrical components in the electrical device to achieve the transmission or interruption of electrical energy.

[0149] The high-voltage distribution unit is used to monitor the high-voltage connection status and insulation status of the battery in real time to manage the high-voltage power safety in the battery.

[0150] The sampling structure is used to obtain parameter information such as voltage and temperature of each component in the battery, such as the battery cell 10, and transmit the obtained parameter information to the battery management system (BMS) so that the battery management system can reasonably implement different control strategies to ensure safe and efficient charging and discharging of the battery.

[0151] Along the thickness direction of the box wall 111, the projection of the electrical assembly 13 can be partially within the range of the through-hole 113, allowing the portion of the electrical assembly 13 within the range of the through-hole 113 to be exposed to the outside for easy maintenance. Along the thickness direction of the box wall 111, the entire projection of the electrical assembly 13 can be fully within the range of the through-hole 113, allowing the portion of the electrical assembly 13 within the range of the through-hole 113 to be exposed to the outside for easy maintenance.

[0152] It should be noted that the specific structures of the sampling structure, battery management system, relay, and high-voltage distribution unit, as well as the principles for achieving corresponding functions, have been applied in related technologies and will not be elaborated here.

[0153] Because the battery also includes an electrical assembly 13, the projection of the electrical assembly 13 along the thickness direction of the box wall 111 at least partially falls within the range of the through-hole 113. Therefore, at least a portion of the electrical assembly 13 can be exposed to the outside through the through-hole 113, enabling maintenance of the electrical assembly 13. Because the electrical assembly 13 includes at least one of a sampling structure, a battery management system, a relay, and a high-voltage power distribution unit, at least one of the sampling structure, the battery management system, the relay, and the high-voltage power distribution unit can be maintained through the through-hole 113.

[0154] In some embodiments, as shown in Figures 4 to 12, 17, and 22, in the accommodating cavity, a plurality of battery cells 10 are arranged along a first direction X to form a battery cell group, where the first direction X is perpendicular to the extension direction of the battery cells 10. In the battery cell group, the poles 101 are arranged along the first direction X, and the through holes 113 are located at positions corresponding to the poles 101 along the thickness direction of the box wall 111. The projections of the poles 101 along the thickness direction of the box wall 111 and the projections of the electrical kit 13 along the thickness direction of the box wall 111 partially or completely fall within the range of the through holes 113.

[0155] The extending direction of the battery cell 10 refers to the extending direction of the longest side of the battery cell 10 .

[0156] The first direction X is a direction perpendicular to the extending direction of the battery cell 10 .

[0157] A plurality of battery cells 10 are arranged along a first direction X to form a battery cell group. Each battery cell 10 is provided with a pole 101 . No pole 101 is provided on the two side surfaces of the battery cell 10 in the first direction X. The pole 101 is provided on the surface of the battery cell group.

[0158] Optionally, the terminals 101 are positioned similarly or identically in each battery cell 10 . The terminals 101 are arranged along a first direction X, and the connecting lines between the terminals 101 are approximately strip-shaped extending along the first direction X. The through-holes 113 are arranged to extend parallel to the first direction X, and the projections of the terminals 101 along the thickness direction of the box wall 111 partially or entirely fall within the range of the through-holes 113 .

[0159] Alternatively, the terminals 101 on some battery cells 10 may be positioned differently. Battery cells 10 having terminals 101 positioned on the same side of the battery cells 10 are arranged adjacent to each other, with the terminals 101 on the battery cell group arranged along the first direction X. One or more through-holes 113 are provided on the box wall 111 such that the projection of the terminals 101 along the thickness direction of the box wall 111 at least partially falls within the range of the through-holes 113 .

[0160] Furthermore, the electrical assembly 13 can be entirely disposed in the space between the pole 101 and the through-hole 113, such that the projection of the electrical assembly 13 along the thickness direction of the box wall 111 falls entirely within the range of the through-hole 113, eliminating the need for additional through-holes 113 corresponding to the electrical assembly 13. The electrical assembly 13 can also be partially disposed in the space between the pole 101 and the through-hole 113, such that the projection of the electrical assembly 13 along the thickness direction of the box wall 111 partially falls within the range of the through-hole 113, allowing maintenance of a portion of the electrical assembly 13 through the through-hole 113. The electrical assembly 13 can also be disposed on a surface of a battery pack without a pole 101, with a through-hole 113 disposed on the surface of the battery pack where the electrical assembly 13 is disposed. The through-hole 113 can be configured to expose at least a portion of each electrical assembly 13, or to expose at least one electrical assembly 13 among a plurality of electrical assemblies 13, with the projection of the electrical assembly 13 along the thickness direction of the box wall 111 at least partially falling within the range of the through-hole 113.

[0161] By arranging the battery cells 10 and the terminals 101 along the first direction X, the terminals 101 are positioned more regularly, and the through-holes 113 are thus more regularly arranged. Because the projections of the terminals 101 and the electrical assembly 13 along the thickness direction of the box wall 111 partially or completely fall within the range of the through-holes 113, at least portions of the terminals 101 and the electrical assembly 13 can be exposed to the outside through the through-holes 113, facilitating maintenance.

[0162] In some embodiments, in the accommodating cavity, multiple battery cell units are arranged along a first direction X to form a battery cell group, and the battery cell unit includes two or more battery cells 10 arranged in parallel along a second direction Y. The first direction X is perpendicular to the extension direction of the battery cell 10, and the second direction Y is perpendicular to the first direction X. Two adjacent battery cells 10 along the second direction Y are arranged in parallel with their poles 101 close to each other or with their poles 101 away from each other. In addition, in the battery cell group, the poles 101 are arranged along the first direction X, the through-holes 113 are located at positions corresponding to the poles 101 along the thickness direction of the box wall 111, and the projections of the poles 101 along the thickness direction of the box wall 111 and the projections of the electrical kit 13 along the thickness direction of the box wall 111 partially or completely fall within the range of the through-holes 113.

[0163] The second direction Y is a direction parallel to the extending direction of the battery cell 10 and is perpendicular to the first direction X.

[0164] A battery cell unit includes at least two battery cells 10 arranged in parallel along the second direction Y. The length of the battery cell unit in the first direction X is the same as the length of the battery cell 10 in the first direction X. The length of the battery cell unit in the second direction Y is the sum of the lengths of all the battery cells 10 included in the battery cell unit in the second direction Y. Multiple battery cell units are arranged along the first direction X to form a battery cell group. The battery cells 10 in the battery cell group are arranged in a matrix.

[0165] Optionally, the poles 101 are disposed on a surface of the battery cell 10 that is parallel to the first direction X and the second direction Y, and the poles 101 are located close to the surface on one side of the second direction Y. In the second direction Y, the battery cells 10 are arranged side by side with the poles 101 close to each other to form a battery cell unit. The battery cell unit is arranged along the first direction X, and the poles 101 are arranged along the first direction X.

[0166] Specifically, when the number of battery cells 10 included in the battery cell unit is even, the sides of each two battery cells 10 provided with the terminals 101 are arranged close to each other. The adjacent terminals 101 are arranged along the first direction X to form at least one strip-shaped region where the terminals 101 are concentrated. A through hole 113 extending along the first direction X may be provided for each of these regions. Alternatively, a through hole 113 extending along the first direction X may be provided for at least one of these regions or for a portion of these regions, so that the projection of the terminal 101 along the thickness direction of the box wall 111 at least partially falls within the range of the through hole 113.

[0167] When the number of battery cells 10 included in the battery cell unit is an odd number, the sides of every two battery cells 10 provided with the poles 101 are arranged close to each other, and the sides of the excess battery cells 10 provided with the poles 101 can be arranged close to or away from the adjacent battery cells 10. The poles 101 of the excess battery cells 10 are arranged along the first direction X to form a strip-shaped area where the poles 101 are concentrated. Through holes 113 can also be provided in this area so that the projections of the poles 101 along the thickness direction of the box wall 111 at least partially fall within the range of the through holes 113.

[0168] Alternatively, the poles 101 are disposed on a surface of the battery cell 10 that is parallel to the first direction X and the second direction Y, and the poles 101 are located close to the surface on one side of the second direction Y. In the second direction Y, the battery cells 10 are arranged side by side with the poles 101 spaced apart from each other, and the poles 101 are arranged along the first direction X.

[0169] Specifically, when a battery cell unit includes two battery cells 10, the sides of the two batteries with the terminals 101 are arranged away from each other. The terminals 101 on the battery cells 10 arranged along the first direction X are also arranged along the first direction X, forming a strip-shaped area where the two terminals 101 are concentrated. A through hole 113 extending along the first direction X can be provided corresponding to at least a portion of this area, such that the projection of the terminal 101 along the thickness direction of the box wall 111 at least partially falls within the range of the through hole 113.

[0170] When the number of battery cells 10 included in a battery cell unit is greater than two, the side of each battery cell 10 provided with the terminal 101 faces the same direction, forming a strip-shaped region where the terminal 101 is concentrated. The number of this region is equal to the number of battery cells 10 in the battery cell unit. A through hole 113 extending along the first direction X can be provided corresponding to at least a portion of this region, such that the projection of the terminal 101 along the thickness direction of the box wall 111 at least partially falls within the range of the through hole 113.

[0171] Alternatively, the terminals 101 are disposed on a surface of the battery cell 10 that is parallel to the first direction X and the second direction Y, with the terminals 101 positioned in the middle or near the middle of the surface. In the second direction Y, the battery cells 10 are arranged side by side, with the terminals 101 on each battery cell 10 spaced apart from each other. The battery cell unit is arranged along the first direction X, with the terminals 101 arranged along the first direction X, forming a strip-shaped region where the terminals 101 are concentrated. The number of terminals 101 in this region is the same as the number of battery cells 10 in the battery cell unit. A through hole 113 extending in the first direction X may be provided corresponding to at least a portion of this region, such that the projection of the terminals 101 along the thickness direction of the box wall 111 at least partially falls within the range of the through hole 113.

[0172] Alternatively, the terminal 101 is disposed on a side surface of the battery cell 10 in the second direction Y. The battery cell unit includes two battery cells 10, which are arranged side by side in the second direction Y with the terminal 101 spaced apart from each other. The battery cell unit is arranged along the first direction X, and the terminal 101 is arranged along the first direction X. A through hole 113 extending along the first direction X may be provided corresponding to at least a portion of this area, such that the projection of the terminal 101 along the thickness direction of the box wall 111 at least partially falls within the range of the through hole 113.

[0173] The electrical assembly 13 can be positioned on any surface of the battery cell pack. Optionally, the electrical assembly 13 is arranged along the first direction X, and through-holes 113 extending along the first direction X are provided for the electrical assembly 13 and the pole 101, respectively, so that the projection of the pole 101 along the thickness direction of the box wall 111 and the projection of the electrical assembly 13 along the thickness direction of the box wall 111 partially or completely fall within the range of the through-holes 113. Furthermore, at least a portion of the electrical assembly 13 is positioned on the pole 101, so that the projection of the electrical assembly 13 along the thickness direction of the box wall 111 at least partially overlaps with the projection of the pole 101 along the thickness direction of the box wall 111. The through-holes 113 are provided for the electrical assembly 13 and the pole 101, so that the projection of the pole 101 along the thickness direction of the box wall 111 and the projection of the electrical assembly 13 along the thickness direction of the box wall 111 partially or completely fall within the range of the through-holes 113.

[0174] The current collector 12 is arranged at the pole 101, and the projection of the pole 101 along the thickness direction of the box wall 111 at least partially overlaps with the projection of the pole 101 along the thickness direction of the box wall 111. When the through hole 113 is arranged corresponding to the pole 101, the projection of the pole 101 along the thickness direction of the box wall 111 and the projection of the current collector 12 along the thickness direction of the box wall 111 partially or completely fall within the range of the through hole 113.

[0175] Since two battery cells 10 adjacent along the second direction Y are juxtaposed with their terminals 101 close to each other, the arrangement of the terminals 101 is relatively concentrated. Therefore, the through holes 113 corresponding to the terminals 101 can be relatively concentrated. The through holes 113 located in similar positions can be integrated into one through hole 113, thereby saving the process of providing the through holes 113 and the sealing cover 112. Since two battery cells 10 adjacent along the second direction Y are juxtaposed with their terminals 101 distant from each other, the arrangement of the terminals 101 on the same side of the battery cells 10 in the second direction Y is relatively concentrated. Therefore, the through holes 113 can be separately provided. The through holes 113 corresponding to the terminals 101 on the same side can be integrated into one through hole 113, thereby saving the process of providing the through holes 113 and the sealing cover 112. Since the projection of the pole 101 along the thickness direction of the box wall 111 and the projection of the electrical kit 13 along the thickness direction of the box wall 111 partially or completely fall within the range of the through hole 113, at least part of the pole 101 and the electrical kit 13 can be exposed to the outside through the through hole 113 for easy maintenance.

[0176] In some embodiments, a length of the battery cell group in a second direction Y is in a range of 800 mm to 1200 mm, and the second direction Y is perpendicular to the first direction X.

[0177] The battery cell pack is placed within the accommodating cavity, with the length of the accommodating box 11 in the second direction Y being greater than the length of the battery cell pack in the second direction Y. In actual use, the upper limit of the size of the accommodating box 11 can be determined based on the size of the space reserved for the battery in the electrical device, thereby determining the upper limit of the length of the battery cell pack in the second direction Y and the upper limit of the length of the battery cell pack in the first direction X. The required total volume of the battery cells 10 in the battery cell pack is determined based on the power required by the electrical device. The lower limit of the length of the battery cell pack in the second direction Y and the lower limit of the length of the battery cell pack in the first direction X are determined based on the volume and upper limit of the size of the battery cell pack. This disclosure does not impose any specific limitations on the size of the battery cell pack. When the battery is used in a vehicle, the length of the battery cell pack in the second direction Y is within the range of 800 mm to 1200 mm. For example, this length can be 800 mm, 850 mm, 900 mm, 1000 mm, 1100 mm, or 1200 mm.

[0178] Therefore, the length of the battery cell group in the second direction Y does not exceed the size of the installation space reserved for the electrical device and can meet the size required for carrying power.

[0179] In some embodiments, the battery cell unit includes two battery cells 10 , and the length dimension of the battery cells 10 in each battery cell unit in the second direction Y is in a range from 350 mm to 700 mm.

[0180] A battery cell unit includes at least two battery cells 10 arranged in parallel along a second direction Y. The length of the battery cell unit in the second direction Y is the sum of the lengths of the battery cells 10 arranged in the second direction Y. The length of the battery cells 10 in the second direction Y is in the range of 350 mm to 700 mm, meaning that the length of the battery cell unit in the second direction Y is no less than 700 mm. For example, this length can be 350 mm, 400 mm, 450 mm, 500 mm, 550 mm, 600 mm, 650 mm, or 700 mm. Accordingly, the length of the battery cell unit in the second direction Y is no greater than 1400 mm.

[0181] Therefore, the size of the battery cell unit composed of the battery cells in the second direction Y does not exceed the size of the installation space reserved for the electrical device, and can meet the size required for carrying power.

[0182] In some embodiments, as shown in FIG. 12 , there are multiple through holes 113 , and one or more closing covers 112 are provided corresponding to each through hole 113 .

[0183] Optionally, multiple through-holes 113 are provided, corresponding to at least a portion of the pole 101 and at least a portion of the electrical assembly 13, with a corresponding closing cover 112 provided for each through-hole 113. Alternatively, multiple through-holes 113 are provided, with one closing cover 112 corresponding to at least one through-hole 113. A single closing cover 112 can be provided to close several through-holes 113 in similar locations, or can be provided to close through-holes 113 located on the same extension line.

[0184] Specifically, two battery cells 10 adjacent to each other along the second direction Y are arranged side by side with their poles 101 close to or away from each other. The poles 101 are arranged along the first direction X to form a strip-shaped region extending along the first direction X. Continuous or discontinuous through-holes 113 extending along the first direction X are provided corresponding to at least a portion of this region. If the poles 101 are close to each other in the second direction Y, the close poles 101 can be considered to be located in the same strip-shaped region, and continuous or discontinuous through-holes 113 extending along the first direction X are provided corresponding to this region. A continuous through-hole 113 extending along the first direction X refers to a single through-hole 113 extending along the first direction X, and a discontinuous through-hole 113 extending along the first direction X refers to a plurality of through-holes 113 extending along the first direction X.

[0185] Optionally, the poles 101 in the corresponding battery single units are arranged along the second direction Y, and continuous or discontinuous through holes 113 extending along the second direction Y are provided corresponding to at least some of the battery single units.

[0186] Thus, the through hole 113 can be set at a location outside the terminal 101 that requires maintenance, meeting the various maintenance requirements of the battery cell 10. The sealing cover 112 is set corresponding to the through hole 113, which can isolate the battery from the external environment when not being maintained, allowing the battery to operate in a closed and stable environment.

[0187] In some embodiments, the projected area of ​​the through hole 113 along the thickness direction of the box wall 111 does not exceed 30% of the projected area of ​​the box wall 111 formed with the through hole 113 along the thickness direction of the box wall 111 .

[0188] The area of ​​the battery cell 10 surface occupied by the electrodes and the busbar generally does not exceed 30% of the surface area of ​​the battery cell 10. If a through hole 113 is provided to expose the electrodes and the busbar, the projected area of ​​the through hole 113 along the thickness direction of the box wall 111 can be set to not exceed 30% of the projected area of ​​the box wall 111 formed with the through hole 113 along the thickness direction of the box wall 111.

[0189] Of course, if a through hole 113 is required to expose the electrical kit 13, the projected area of ​​the through hole 113 along the thickness direction of the box wall 111 may also be greater than 30% of the projected area of ​​the box wall 111 formed with the through hole 113 along the thickness direction of the box wall 111. The present disclosure does not make any special restrictions on this.

[0190] By limiting the area of ​​the through hole 113 to 30% of the area of ​​the box wall 111 where the through hole 113 is provided, the maintenance requirements for at least part of the pole 101 can be met while preventing the through hole 113 from being too large and affecting the structural strength of the box wall 111.

[0191] In some embodiments, the length of the through hole 113 along the first direction X is greater than or equal to the length of the accommodating cavity along the first direction X, or the length of the through hole 113 along the second direction Y is greater than or equal to the length of the accommodating cavity along the second direction Y, wherein the first direction X is perpendicular to the extension direction of the battery cell 10, and the second direction Y is perpendicular to the first direction X.

[0192] Optionally, the length of the through hole 113 along the first direction X is greater than or equal to the length of the accommodating cavity along the first direction X. The poles 101 are arranged along the first direction X, and the length of the through hole 113 along the first direction X is greater than or equal to the length of the accommodating cavity along the first direction X. This allows at least a portion of all poles 101 arranged along the first direction X to be exposed, allowing each pole 101 arranged along the first direction X to be accessible for maintenance.

[0193] Alternatively, the length of the through hole 113 along the second direction Y is greater than or equal to the length of the accommodating cavity along the second direction Y. The electrodes 101 in the battery cell are arranged along the second direction Y. The length of the through hole 113 along the second direction Y is greater than or equal to the length of the accommodating cavity along the second direction Y. This allows at least a portion of all electrodes 101 arranged along the second direction Y to be exposed, allowing each electrode 101 arranged along the second direction Y to be accessible for maintenance.

[0194] Since the length of the through hole 113 along the first direction X is greater than or equal to the length of the accommodating cavity along the first direction X, the through hole 113 can expose at least a portion of each battery cell 10 arranged in the first direction X. Alternatively, since the length of the through hole 113 along the second direction Y is greater than or equal to the length of the accommodating cavity along the second direction Y, the through hole 113 can expose at least a portion of each battery cell 10 arranged in the second direction Y.

[0195] In some embodiments, the length of the through hole 113 along the first direction X is no greater than 500 mm. For example, the length may be 50 mm, 100 mm, 150 mm, 200 mm, 250 mm, 300 mm, 350 mm, 400 mm, 450 mm, or 500 mm.

[0196] In this way, the maintenance requirements for at least part of the poles 101 can be met, and the structural strength of the box wall 111 can be prevented from being affected by an excessively large area of ​​the through hole 113 .

[0197] In some embodiments, the length of the through hole 113 along the first direction X is in the range of 50 mm to 300 mm. For example, the length can be 50 mm, 80 mm, 100 mm, 150 mm, 160 mm, 200 mm, 220 mm, 250 mm, or 300 mm.

[0198] Therefore, a more appropriate size range of the through hole 113 is provided, which can not only meet the maintenance requirements of at least part of the pole 101 , but also avoid the through hole 113 being too large in area to affect the structural strength of the box wall 111 .

[0199] In some embodiments, as shown in Figures 12, 14, 17, 18, 21, 22, 23 and 26, a sealing member 114 is provided around the through hole 113, and the sealing member 114 is used to seal between the through hole 113 and the closing cover 112.

[0200] Seal 114 is made of an elastic material, such as rubber, which is not specifically limited in this disclosure. Seal 114 is disposed between cover 112 and through-hole 113, surrounding the edge of through-hole 113. When cover 112 seals through-hole 113, it compresses seal 114, reducing the gap between cover 112 and through-hole 113.

[0201] Thus, the closing cover 112 and the through hole 113 can maintain a relatively tight sealing effect, preventing external dust and liquid from entering the accommodating cavity and damaging the battery cell 10 .

[0202] In some embodiments, as shown in FIG. 13 to FIG. 16 , the closing cover 112 is mounted on the box wall 111 by screws, or the closing cover 112 is slidably engaged with the box wall 111 , or the closing cover 112 is hinged to the box wall 111 .

[0203] Optionally, a closure cover 112 is mounted to the box wall 111 via screws. The closure cover 112 covers the through-hole 113, and the projected area of ​​the closure cover 112 along the thickness of the box wall 111 is larger than the area of ​​the through-hole 113. Threaded holes are provided in the box wall 111. During installation, screws are inserted through the threaded holes in the closure cover 112 and the box wall 111, sealing the through-hole 113. During removal, the screws are removed and the closure cover 112 is removed from the box wall 111, allowing the through-hole 113 to communicate with the outside world.

[0204] Alternatively, the closure cover 112 can be slidably engaged with the box wall 111. Slide grooves are provided on the surface of the box wall 111 on either side of the through-hole 113. The two sides of the closure cover 112 are configured to be inserted into and slide relative to the slide grooves, allowing the closure cover 112 to slide over the through-hole 113. Specifically, a slide groove is provided on each side of the box wall 111 perpendicular to the direction in which the through-hole 113 extends. The slide grooves extend from the edge of the through-hole 113 away from the accommodating cavity and bend away from each other. The two sides of the closure cover 112 extend toward the accommodating cavity and bend toward each other. This structure engages with the slide grooves, allowing the closure cover 112 to slide within the slide grooves. Furthermore, a stopper is provided on the box wall 111 on the side of the through-hole 113 that is located in the direction in which the through-hole 113 extends. This stopper can prevent the closure cover 112 from sliding in or out of the accommodating cavity from the other side.

[0205] Alternatively, the closure cover 112 is hinged to the box wall 111. One side of the closure cover 112 can be hinged to a surface of the box wall 111 on either side of the through hole 113, and the closure cover 112 can be rotated relative to the hinged position to open and close the through hole 113. Furthermore, one side of the closure cover 112 is hinged to the box wall 111, and the other side of the closure cover 112 is removably fixed to the box wall 111 via magnets or screws.

[0206] It is understandable that the closing cover 112 may be constructed in other detachable structures, and the present disclosure does not impose any special limitation on this.

[0207] The closure cover 112 is mounted to the box wall 111 with screws, which secure the installation securely. Removal is achieved by simply turning the screws, resulting in a simple structure and convenient operation, saving time and effort. The closure cover 112 is slidably engaged with the box wall 111, making it easy to slide and quickly remove. The closure cover 112 is hinged to the box wall 111, allowing partial removal by turning the cover 112, saving effort and allowing for quick removal.

[0208] In some embodiments, as shown in Figures 22 and 24 to 26, the box wall 111 formed with the through hole 113 has a boss 1113, and the boss 1113 is formed by the box wall 111 bulging in the direction away from the battery cell 10. The through hole 113 is opened on the wall surface of the boss 1113 facing the battery cell 10, and the boss 1113 forms a receiving portion on the side facing the battery cell 10, and at least a portion of the electrical kit 13 is located in the receiving portion.

[0209] A boss 1113 is constructed on the box wall 111, which is formed with a through hole 113. The boss 1113 forms a receiving portion on the side facing the battery cell 10. The receiving portion communicates with the receiving cavity and can be used to accommodate the electrical assembly 13. A through hole 113 is provided on the wall of the boss 1113 facing the battery cell 10, connecting the receiving portion to the outside world. The projection of the through hole 113 along the thickness direction of the box wall 111 falls entirely within the range of the boss 1113. Optionally, the wall of the boss 1113 facing the battery cell 10 is completely penetrated to form the through hole 113, forming a channel-shaped boss 1113.

[0210] The terminal post 101 may be flush with the outer surface of the battery cell 10, so that the outer surface of the battery cell 10 is a complete surface; alternatively, the terminal post 101 may protrude from the outer surface of the battery cell 10. When the terminal post 101 protrudes from the surface of the battery cell 10, the receiving portion may also be used to accommodate the terminal post 101 and / or the busbar.

[0211] Optionally, at least a portion of the electrical assembly 13 is positioned between the terminal 101 and the through-hole 113. Specifically, the projection of the electrical assembly 13 along the thickness direction of the box wall 111 at least partially overlaps with the projection of the terminal 101 along the thickness direction of the box wall 111, so that at least a portion of the electrical assembly 13 is positioned within the accommodating portion. Furthermore, the length of the boss 1113 along the first direction X is greater than or equal to the length of the accommodating cavity along the first direction X, or the length of the boss 1113 along the second direction Y is greater than or equal to the length of the accommodating cavity along the second direction Y, enabling the boss 1113 to accommodate a larger number of electrical assemblies 13. The first direction X is perpendicular to the extension direction of the battery cell 10, and the second direction Y is perpendicular to the first direction X.

[0212] Because the boss 1113 is formed by the wall 111 protruding away from the battery cell 10, there is space inside the boss 1113 to accommodate the portion of the battery cell 10 that protrudes from the surface. Because the through hole 113 is formed in the wall of the boss 1113 facing the battery cell 10, at least a portion of the terminal 101 is accommodated within the accommodating portion. Since at least a portion of the electrical assembly 13 is located within the accommodating portion, the space occupied by the electrical assembly 13 within the accommodating cavity is reduced, which helps to reduce the volume of the accommodating box 11.

[0213] In some embodiments, as shown in Figure 23, the closing cover 112 installed on the box wall 111 is configured to be convex relative to the box wall 111, and the closing cover 112 forms a accommodating space on the side facing the battery cell 10, and at least a portion of the electrical kit 13 is located in the accommodating space via the through hole 113.

[0214] A closure cover 112 is removably mounted on the box wall 111 at the through hole 113. The closure cover 112 protrudes 102 away from the battery cell 10, forming a storage space on the side of the closure cover 112 facing the battery cell 10. The storage space can communicate with the storage cavity or the storage portion through the through hole 113. At least a portion of at least one of the terminal 101, the busbar, and the electrical assembly 13 can be accommodated in the storage space.

[0215] In actual use, through-holes 113 can be opened in the box wall 111 to correspond to the positions of the poles 101 and the current busbar, so that the projections of the poles 101 and the current busbar along the thickness direction of the box wall 111 all fall within the range of the through-holes 113. Parts of the poles 101 and the current busbar protrude from the surface of the box wall 111. The closure cover 112 covers the through-holes 113, and the portions of the poles 101 and the current busbar protruding from the surface of the box wall 111 are accommodated in the accommodation space of the closure cover 112. The electrical assembly 13 can be dispersed or concentrated on any surface of the battery cell pack. The through-holes 113 can be opened in the box wall 111 to correspond to the positions of the electrical assembly 13, so that the projections of the electrical assembly 13 along the thickness direction of the box wall 111 all fall within the range of the through-holes 113. A portion of the electrical assembly 13 protrudes from the surface of the box wall 111 . The closing cover 112 covers the through hole 113 and accommodates the portion of the electrical assembly 13 protruding from the surface of the box wall 111 in the accommodating space of the closing cover 112 .

[0216] If the electrical kit 13 is arranged between the busbar and the through hole 113, the size of the through hole 113 can be appropriately increased corresponding to the size of the electrical kit 13, so that the projections of the electrical kit 13, the pole 101 and the busbar along the thickness direction of the box wall 111 all fall within the range of the through hole 113, so that the pole 101, the busbar and a part of the electrical kit 13 protrude from the surface of the box wall 111 from the through hole 113, the closing cover 112 covers the through hole 113, and the parts of the pole 101, the busbar and the electrical kit 13 protruding from the surface of the box wall 111 are accommodated in the accommodating space of the closing cover 112.

[0217] Optionally, the inner wall surface of the closing cover 112 surrounds and is in close contact with the outer surface of the boss 1113 , and a seal may be provided between the inner wall surface of the closing cover 112 and the outer surface of the boss 1113 to accommodate at least part of the boss 1113 in the accommodating space of the closing cover 112 .

[0218] The shape of the through hole 113 can be set according to the arrangement of the pole 101 and the busbar, and can also be set according to the shape of the electrical kit 13. The through hole 113 can be set to an elliptical, oblong, rectangular, etc., as long as it meets the exposed size requirements of the inspection component. The present disclosure does not impose any special restrictions on the shape of the through hole 113.

[0219] As a result, at least a portion of the electrical assembly 13 is placed within the accommodating space of the cover 112, reducing the space occupied by the electrical assembly 13 within the accommodating cavity and thus helping to reduce the volume of the accommodating box 11. Furthermore, the accommodating space of the cover 112 and the accommodating portion of the boss 1113 overlap to form a larger space, which can accommodate more terminals 101 and the electrical assembly 13, further reducing the space occupied by the protruding portion of the battery cell 10 within the accommodating cavity.

[0220] In some embodiments, as shown in FIG. 10 to FIG. 22 and FIG. 24 to FIG. 26 , the closing cover 112 is configured in a flat plate shape.

[0221] The closing cover 112 is flat and fits snugly against the surface of the box wall 111, completely covering the through hole 113 and sealing it. After the closing cover 112 seals the through hole 113, a gap exists between the terminal 101 and the closing cover 112. That is, the height of the terminal 101 is less than the distance between the surface of the battery cell 10 and the closing cover 112, allowing the terminal 101 to be accommodated within the accommodating cavity. The height of the terminal 101 refers to the distance between the end of the terminal 101 away from the battery cell 10 and the surface of the battery cell 10 where the terminal 101 is located.

[0222] Therefore, the structure is simple and easy to process.

[0223] In some embodiments, as shown in FIG. 25 and FIG. 26 , the pole 101 and part or all of the electrical assembly 13 are located in the receiving portion.

[0224] The inner surface of the box wall 111 can be positioned close to or in contact with the surface of the battery cell 10 to reduce the volume of the accommodating cavity. For the terminals 101 protruding from the surface of the battery cell 10, bosses 1113 are constructed on the box wall 111, ensuring that the projection of the terminals 101 along the thickness of the box wall 111 falls entirely within the bosses 1113. If there is a gap between the inner surface of the box wall 111 and the surface of the battery cell 10, part of the terminal 101 is located within the accommodating cavity, while the remaining part is located within the accommodating portion. If the inner surface of the box wall 111 is in contact with the surface of the battery cell 10, the entire terminal 101 is located within the accommodating portion.

[0225] Since the current bus is placed on the pole 101 , at least a portion of the current bus is located in the receiving portion.

[0226] The electrical assembly 13 can be positioned on any surface of the battery cell pack. A boss 1113 is provided on the box wall 111 corresponding to the placement of at least a portion of the electrical assembly 13 and the terminal 101, so that at least a portion of the electrical assembly 13 and the terminal 101 are accommodated within the boss 1113. Alternatively, the electrical assembly 13 can be positioned on the same surface of the battery cell pack, close to each other. For electrical assembly 13 located in a concentrated area, a boss 1113 is provided on the box wall 111, so that at least a portion of the electrical assembly 13 is located within the same accommodation portion. Similarly, alternatively, at least a portion of the electrical assembly 13 can be positioned between the terminal 101 and the box wall 111, so that the projection of the electrical assembly 13 along the thickness direction of the box wall 111 falls within the range of the terminal 101. Corresponding to the electrical assembly 13 and the pole 101 arranged at the pole 101, a boss 1113 is provided on the box wall 111, so that the pole 101 and at least part of the electrical assembly 13 are located in the same accommodation portion, thereby reducing the number of bosses 1113 required to be provided and simplifying the process.

[0227] As a result, the space occupied by at least a portion of the poles 101 and the electrical assembly 13 in the accommodation cavity is reduced, which helps to reduce the volume of the accommodation box 11.

[0228] In some embodiments, as shown in FIG3 and FIG5 to FIG8 , a protrusion 102 is provided on the battery cell 10 , and the pole 101 is provided on the surface of the protrusion 102 facing the through hole 113 , and at least a portion of the protrusion 102 is located in the receiving portion.

[0229] The surface of the battery cell 10 is configured with a protrusion 102 protruding toward the box wall 111. The shape of the protrusion 102 can be cylindrical, cubic, or the like. The present disclosure does not impose any particular restrictions on the specific shape of the protrusion 102. The protrusion 102 can be located on one side of the battery cell 10 in the second direction Y, on both sides of the battery cell 10 in the second direction Y, in the middle of the battery cell 10, or in other locations. The present disclosure does not impose any particular restrictions on the specific location of the protrusion 102.

[0230] The terminal 101 is disposed on a side surface of the protrusion 102 away from the battery cell 10. A through hole 113 is provided in the box wall 111 corresponding to the location of the terminal 101, such that the projection of the terminal 101 along the thickness direction of the box wall 111 at least partially falls within the range of the through hole 113. Multiple battery cells 10 are arranged along a first direction X and / or a second direction Y to form a battery cell group. A protrusion 102 is constructed on the surface of the battery cell group facing the box wall 111, and the arrangement direction of the protrusion 102 is the same as the arrangement direction of the battery cell group. Through holes 113 are provided corresponding to the protrusions 102 located on the same straight line, and at least a portion of the protrusion 102 is accommodated within the accommodating portion, thereby accommodating the terminal 101 within the accommodating portion. Optionally, at least a portion of the protrusion 102 is accommodated in the accommodating space of the closure cover 112, thereby accommodating the terminal 101 within the accommodating space.

[0231] Optionally, the electrical assembly 13 and / or the heat exchange assembly 14 can be placed on the surface of the battery cell 10 where the protrusion 102 is not provided. A gap exists between the casing wall 111 and the surface of the battery cell 10 where the protrusion 102 is provided. The space between the periphery of the protrusion 102 and the casing wall 111 can be used to accommodate components such as the electrical assembly 13 and the heat exchange assembly 14. Similarly, the electrical assembly 13 and the current collector 12 can be placed on the pole 101, and a through hole 113 is provided in the casing wall 111. The projections of the electrical assembly 13 and the current collector 12 along the thickness direction of the casing wall 111 at least partially fall within the range of the through hole 113, and at least a portion of the electrical assembly 13 and the current collector 12 are located within the accommodating portion.

[0232] The heat exchange component 14 is provided with a flow channel and a heat exchange medium inside. The heat exchange medium can flow in the flow channel to transfer heat from one area of ​​the heat exchange component 14 to another area, thereby achieving the purpose of adjusting the temperature of the object in contact with the heat exchange component 14.

[0233] By providing a protrusion 102 on the battery cell 10, the pole 101 can be separated from the surface of the battery cell 10, and other components can be further provided on the surface of the battery cell 10. The other components do not interfere with the pole 101, thereby reducing the risk of the pole 101 being connected and conductive with other components on the battery surface; the height of the pole 101 in the first direction X can also be increased without reducing the strength of the pole 101, so as to provide a heat exchange component accommodating space of appropriate height as needed.

[0234] In some embodiments, as shown in FIG. 3 and FIG. 5 to FIG. 8 , the electrode 101 includes a positive electrode and a negative electrode, and the positive electrode and the negative electrode are spaced apart and arranged on the protrusion 102 .

[0235] Each battery cell 10 is equipped with two posts 101: a positive post connected to the positive electrode of the battery cell 10, and a negative post connected to the negative electrode of the battery cell 10. The positive and negative posts are spaced apart and arranged on a protrusion 102. The protrusion 102 can be constructed on the surface of the battery cell 10, with the positive and negative posts arranged on the same protrusion 102; or relatively independent protrusions 102 can be constructed on the surface of the battery cell 10 for the positive and negative posts, respectively.

[0236] By arranging the positive electrode column and the negative electrode column at intervals on the protrusion 102 , the positive electrode column and the negative electrode column are relatively independent and do not interfere with each other, thereby reducing the risk of short circuit between the two.

[0237] In some embodiments, as shown in Figures 3, 5 and 6, the number of the protrusion 102 is one, the positive electrode column and the negative electrode column are spaced apart from each other on the protrusion 102, and the line connecting the positive electrode column and the negative electrode column is parallel to the extension direction of the battery cell 10, or the line connecting the positive electrode column and the negative electrode column is perpendicular to the extension direction of the battery cell 10.

[0238] Only one protrusion 102 is constructed on the surface of the battery cell 10, and the positive electrode column and the negative electrode column are arranged on the protrusion 102 at intervals. The positive electrode column and the negative electrode column can be arranged on the diagonal line of the protrusion 102, or the positive electrode column and the negative electrode column can be arranged on the protrusion 102 at intervals along the first direction X, or the positive electrode column and the negative electrode column can be arranged on the protrusion 102 at intervals along the second direction Y.

[0239] Among them, when the positive electrode column and the negative electrode column are arranged at intervals from each other along the first direction X, the line connecting the positive electrode column and the negative electrode column is perpendicular to the extension direction of the battery cell 10; when the positive electrode column and the negative electrode column are arranged at intervals from each other along the second direction Y, the line connecting the positive electrode column and the negative electrode column is parallel to the extension direction of the battery cell 10.

[0240] Optionally, on a surface of the battery cell 10 that is parallel to the first direction X and the second direction Y, the protrusion 102 is disposed on one side of the surface in the second direction Y. Multiple battery cells 10 are arranged along the first direction X, and the protrusion 102 extends along the first direction X. The protrusion 102 is located on one side of the surface in the second direction Y. A heat exchange assembly 14 can be disposed in the accommodation cavity on the other side of the surface in the second direction Y, and the electrical assembly 13 can be disposed between the protrusion 102 and the box wall 111 or the through-hole 113.

[0241] Alternatively, the protrusion 102 may be positioned in the middle of a surface of the battery cell 10 that is parallel to the first direction X and the second direction Y. Multiple battery cells 10 are arranged along the first direction X, with the protrusion 102 extending along the first direction X. Heat exchange assemblies 14 may be positioned in the accommodating cavities on either side of the protrusion 102 in the second direction Y, and the electrical assembly 13 may be positioned between the protrusion 102 and the box wall 111 or the through-hole 113.

[0242] The positive and negative electrode posts are located on the same protrusion 102. Arranging the positive and negative electrode posts with the line connecting them parallel to the extension direction of the battery cell 10, or arranging the positive and negative electrode posts with the line connecting them perpendicular to the extension direction of the battery cell 10, results in a more regular arrangement and facilitates later maintenance. Furthermore, the protrusion 102 for accommodating the two posts 101 has a larger area, which helps to improve the strength of the area in the battery cell 10 where the posts 101 are located.

[0243] In some embodiments, as shown in FIG. 7 and FIG. 8 , at least two protrusions 102 are spaced apart from each other, the positive electrode column is disposed on one protrusion 102 , and the negative electrode column is disposed on the other protrusion 102 .

[0244] Two protrusions 102 are constructed on the surface of the battery cell 10, with the positive electrode column disposed on one protrusion 102 and the negative electrode column disposed on the other protrusion 102. The two protrusions 102 may be disposed spaced apart on one side or in the middle of the surface of the battery cell 10, or on either side of the surface of the battery cell 10. The present disclosure does not impose any particular limitation on the location of the protrusions 102 on the surface of the battery cell 10.

[0245] Specifically, two protrusions 102 are spaced apart and positioned in the middle of the surface of the battery cell 10. The two protrusions 102 can be arranged along the first direction X or the second direction Y. Multiple battery cells 10 are arranged along the first direction X, with the protrusions 102 extending along the first direction X. The electrical assembly 13 is positioned between the two protrusions 102 and / or between the protrusions 102 and the box wall 111. If the two protrusions 102 are arranged along the first direction X, the heat exchange assembly 14 can be positioned in the receiving cavities on both sides of the protrusions 102 in the second direction Y. If the two protrusions 102 are arranged along the second direction Y, the heat exchange assembly 14 can be positioned in the receiving cavities on the sides of the two protrusions 102 that are away from each other in the second direction Y, and the electrical assembly 13 can be positioned between the two protrusions 102.

[0246] Two protrusions 102 are spaced apart and disposed on one side of the battery surface in the second direction Y. The two protrusions 102 can be arranged along the first direction X or the second direction Y. Multiple battery cells 10 are arranged along the first direction X, with the protrusions 102 extending along the first direction X. An electrical assembly 13 is disposed between the two protrusions 102 and / or between the protrusion 102 and the box wall 111. A heat exchange assembly 14 is disposed in the accommodating cavity on the other side of the surface in the second direction Y.

[0247] The two protrusions 102 are spaced apart and arranged on either side of the battery surface in the second direction Y. The battery cells 10 are arranged along the first direction X, and the protrusions 102 extend along the first direction X. A heat exchange assembly 14 is disposed in the receiving cavity between the two protrusions 102 , and an electrical assembly 13 is disposed between the protrusion 102 and the box wall 111 .

[0248] Since at least two protrusions 102 are provided and the positive electrode column and the negative electrode column are respectively provided on different protrusions 102 , there is a large distance between the positive electrode column and the negative electrode column, so that the two can be relatively independent and do not interfere with each other, thereby reducing the risk of short circuit between the two.

[0249] In a second aspect, the present disclosure further provides an electrical device, comprising a battery, wherein the battery serves as a power source for the electrical device.

[0250] Since the electrical device includes a battery that is easy to inspect, when the electrical device operates abnormally, the battery can be quickly inspected by removing the cover 112. After the inspection is completed, the cover 112 can be replaced to restore the device to its original state. This saves time and effort and reduces the maintenance burden on workers.

[0251] In some embodiments, as shown in Figures 27 to 31, the electrical device is a vehicle, the vehicle includes at least one seat 15, a portion of the battery box wall 111 constitutes the floor of the vehicle, the seat 15 is arranged on the floor, a through hole 113 is set through the floor, the closing cover 112 is detachably mounted on the floor, and covers the through hole 113, and the projection of the seat 15 on the battery along the up and down direction Z of the vehicle is located outside the range of the through hole 113.

[0252] The vehicle up-down direction Z refers to the direction perpendicular to the plane on which the vehicle is traveling.

[0253] The box wall 111 of the accommodating box 11 forms a box body 1111 with an opening at one end and a cover body 1112 for closing the opening of the box body 1111. The battery cell 10 is placed in the box body 1111, and the cover body 1112 can be constructed as the floor of the vehicle. The through hole 113 passes through the floor formed by the cover body 1112, exposing at least part of the pole 101. The closing cover 112 is detachably mounted on the floor and covers the through hole 113. The box body 1111 is arranged on one side surface of the floor, and the seat 15 is arranged on the other side surface of the floor. Along the up-down direction Z of the vehicle, the projection of the through hole 113 on the floor does not coincide with the projection of the seat 15 on the floor.

[0254] It is understood that a plurality of through holes 113 may be provided to expose components that need to be repaired. When the pole 101 and the electrical assembly 13 are disposed close to the box body 1111 , the through holes 113 may be provided on the box body 1111 .

[0255] Since a portion of the battery box wall 111 forms the vehicle's floor, space in the vehicle's vertical direction Z can be saved, helping to increase the battery's energy density. Since the through-hole 113 penetrates the floor, exposing the battery cells 10, and the projection of the seat 15 on the battery along the vehicle's vertical direction Z is outside the range of the through-hole 113, the seat 15 does not block the through-hole 113. During maintenance, there is no need to move or remove the seat 15, and the battery can be inspected directly from inside the vehicle, saving time and effort. By removably attaching the closure cover 112 to the floor and covering the through-hole 113, the battery cells 10 are isolated from the interior of the vehicle, providing both dust and water protection and preventing direct contact between the user and the battery cells 10, thereby reducing the risk of electric shock.

[0256] In some embodiments, as shown in Figures 27 to 31, the electrical device is a vehicle, which includes a floor and at least one seat 15, the battery is located on one side of the floor along the vehicle up-down direction Z, the seat 15 is located on the other side of the floor along the vehicle up-down direction Z, and the through hole 113 of the battery faces the other side of the vehicle up-down direction Z, and the projection of the seat 15 on the battery along the vehicle up-down direction Z is outside the range of the through hole 113.

[0257] A portion of the box wall 111 contacts the bottom plate. A through-hole 113 is defined in the portion of the box wall 111 that contacts the bottom plate. A hole is defined in the bottom plate corresponding to the through-hole 113. Along the vertical direction of the vehicle, the projection of the hole on the bottom plate coincides with the projection of the through-hole 113. A closure cover 112 is removably mounted on the box wall 111 or the bottom plate and covers the through-hole 113. A seat 15 is positioned on the side of the bottom plate away from the battery. The projection of the seat 15 onto the battery, along the vertical direction Z of the vehicle, lies outside the range of the through-hole 113.

[0258] Because through-hole 113 extends through the floor and wall 111, and the projection of seat 15 onto the battery in the vertical direction Z of the vehicle is outside the range of through-hole 113, seat 15 does not block through-hole 113. During maintenance, there is no need to remove seat 15, allowing direct access to the battery from inside the vehicle, saving time and effort. By removably attaching closure cover 112 to the floor and covering through-hole 113, battery cells 10 are isolated from the interior of the vehicle, preventing direct contact between the user and battery cells 10 and reducing the risk of electric shock.

[0259] In some embodiments, continuing to refer to Figures 27 to 31, the vehicle includes at least one seat row, the seat row includes at least two seats 15 arranged along the left-right direction Y of the vehicle, along the left-right direction Y of the vehicle, the through hole 113 is located between adjacent seats 15 in the same seat row, and / or the through hole 113 is located on both sides of the left-right direction Y of the vehicle in the same seat row.

[0260] The left-right direction Y of the vehicle refers to a direction perpendicular to both the up-down direction Z of the vehicle and the driving direction of the vehicle, and is parallel to the second direction Y.

[0261] The number of seats 15 may be multiple, with at least two seats 15 spaced apart along the vehicle's left-right direction Y. The seats 15 spaced apart along the vehicle's left-right direction Y are considered a seat row, and at least one seat row spaced apart along the vehicle's travel direction. Along the vehicle's left-right direction Y, the through-holes 113 are located between adjacent seats 15 in the same seat row, and / or the through-holes 113 are located on both sides of the same seat row in the vehicle's left-right direction Y.

[0262] Therefore, when maintenance is performed through the through hole 113 , the seat 15 does not block the through hole 113 , which is convenient for maintenance and does not require the seat 15 to be disassembled, thereby having little impact on the interior of the vehicle.

[0263] In a third aspect, the present disclosure further provides an energy storage device, comprising the battery as described above, wherein the battery is configured to store and provide electrical energy.

[0264] Since the energy storage device includes batteries that are easily accessible for maintenance, when the energy storage device operates abnormally, the battery can be quickly repaired by removing the cover 112. After the repair is completed, the cover 112 can be replaced to restore the device to its original state. This saves time and effort and reduces the maintenance burden on workers.

[0265] The various embodiments / implementations provided in the present disclosure can be combined with each other without causing any contradiction.

[0266] The foregoing description is merely a preferred embodiment of the present disclosure and is not intended to limit the present disclosure. Those skilled in the art will readily appreciate that various modifications and variations are possible. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present disclosure shall be included within the scope of protection of the present disclosure. Industrial Applicability

[0267] The battery, power-consuming device, and energy storage device provided by the present disclosure are conducive to improving the convenience of internal inspection and maintenance of the battery, thereby helping to save maintenance time for the batteries in the power-consuming device and energy storage device.

Claims

1. A battery, wherein: include: at least one battery cell, the battery cell comprising a terminal; a storage box, wherein the storage box has a storage cavity, each battery cell is accommodated in the storage cavity, the storage box comprises a box wall and a closing cover, the box wall has a through hole, and the closing cover is detachably mounted on the box wall and covers the through hole; At least a portion of the projection of the pole along the thickness direction of the box wall falls within the range of the through hole.

2. The battery according to claim 1, wherein A box body with an opening at one end and a cover body for closing the opening of the box body are formed by the box wall of the accommodating box, and the through hole is opened in the box body and / or the cover body.

3. The battery according to claim 1 or 2, wherein The battery further includes a busbar used to connect poles of two battery cells. Along the thickness direction of the box wall, at least a portion of the projection of the busbar falls within the range of the through hole.

4. The battery according to claim 3, wherein The battery further includes an electrical kit, which includes at least one of a sampling structure, a battery management system, a relay, and a high-voltage distribution unit. Along the thickness direction of the box wall, a projection of the electrical kit at least partially falls within the range of the through hole.

5. The battery according to claim 4, wherein In the accommodating cavity, a plurality of the battery cells are arranged along a first direction to form a battery cell group, wherein the first direction is perpendicular to an extending direction of the battery cells. In the battery cell group, the poles are arranged along the first direction, The through hole is located at a position corresponding to the pole along the thickness direction of the box wall, and the projection of the pole along the thickness direction of the box wall and the projection of the electrical kit along the thickness direction of the box wall partially or completely fall within the range of the through hole.

6. The battery according to claim 4, wherein In the accommodating cavity, a plurality of battery monomer units are arranged along a first direction to form a battery monomer group, and the battery monomer unit includes two or more battery monomers arranged in parallel along a second direction, the first direction is perpendicular to the extension direction of the battery monomer, and the second direction is perpendicular to the first direction. Two battery cells adjacent to each other along the second direction are arranged in parallel with their poles close to each other or in parallel with their poles far away from each other, and in the battery cell group, the poles are arranged along the first direction. The through hole is located at a position corresponding to the pole along the thickness direction of the box wall, and the projection of the pole along the thickness direction of the box wall and the projection of the electrical kit along the thickness direction of the box wall partially or completely fall within the range of the through hole.

7. The battery according to claim 5 or 6, wherein A length dimension of the battery cell group in a second direction is in a range of 800 mm to 1200 mm, and the second direction is perpendicular to the first direction.

8. The battery according to claim 6, wherein The battery cell unit includes two battery cells, and a length dimension of the battery cells in each battery cell unit in the second direction is in a range from 350 mm to 700 mm.

9. The battery according to any one of claims 1 to 8, wherein There are multiple through holes. One or more closing covers are provided corresponding to each of the through holes.

10. The battery according to any one of claims 1 to 9, wherein The projected area of ​​the through hole along the thickness direction of the box wall does not exceed 30% of the projected area of ​​the box wall where the through hole is formed along the thickness direction of the box wall.

11. The battery according to any one of claims 1 to 10, wherein The length of the through hole along the first direction is greater than or equal to the length of the accommodating cavity along the first direction, or, A length of the through hole along a second direction is greater than or equal to a length of the accommodating cavity along the second direction, wherein the first direction is perpendicular to an extending direction of the battery cell, and the second direction is perpendicular to the first direction.

12. The battery according to any one of claims 1 to 10, wherein The length of the through hole along the first direction is no more than 500 mm.

13. The battery according to claim 12, wherein A length of the through hole along the first direction is in a range of 50 mm to 300 mm.

14. The battery according to any one of claims 1 to 13, wherein A sealing member is provided around the through hole, and is used for sealing between the through hole and the closing cover.

15. The battery according to any one of claims 1 to 14, wherein The closure cover is mounted on the box wall by screws, or The closure cover is slidably engaged with the box wall, or, The closure cover is hinged to the box wall.

16. The battery according to any one of claims 4 to 15, wherein The box wall having the through hole has a boss, which is formed by the box wall bulging in a direction away from the battery cell, and the through hole is opened on the wall surface of the boss facing the battery cell. The boss forms a receiving portion on a side facing the battery cell, and at least a portion of the electrical kit is located in the receiving portion.

17. The battery according to any one of claims 4 to 16, wherein The closing cover mounted on the box wall is configured to be convex relative to the box wall. The closing cover forms a receiving space on a side facing the battery cell. At least a portion of the electrical kit is located in the receiving space via the through hole.

18. The battery according to claim 16, wherein The closing cover is configured in a flat plate shape.

19. The battery according to claim 16 or 17, wherein The pole and part or all of the electrical assembly are located in the accommodation portion.

20. The battery according to any one of claims 16 to 19, wherein The battery cell is provided with a protrusion, the pole is provided on a surface of the protrusion facing the through hole, and at least a portion of the protrusion is located in the accommodating portion.

21. The battery according to claim 20, wherein The poles include a positive pole and a negative pole, and the positive pole and the negative pole are spaced apart from each other and arranged on the protrusion.

22. The battery according to claim 21, wherein The number of the protrusion is one, the positive electrode column and the negative electrode column are spaced apart from each other on the protrusion, the connecting line of the positive electrode column and the negative electrode column is parallel to the extension direction of the battery cell, or the connecting line of the positive electrode column and the negative electrode column is perpendicular to the extension direction of the battery cell.

23. The battery according to claim 21, wherein At least two of the protrusions are spaced apart from each other, the positive electrode column is arranged on one of the protrusions, and the negative electrode column is arranged on the other of the protrusions.

24. An electrical device, wherein: The battery according to any one of claims 1 to 23 is used as a power source for the electrical device.

25. The electrical device according to claim 24, wherein: The electrical device is a vehicle, which includes at least one seat. A portion of the battery box wall constitutes a floor of the vehicle. The seat is disposed on the floor. The through hole is disposed through the floor. The closing cover is detachably mounted on the floor and covers the through hole. A projection of the seat onto the battery along the vertical direction of the vehicle is located outside the range of the through hole.

26. The electrical device according to claim 24, wherein: The electrical device is a vehicle, comprising a floor and at least one seat, the battery being located on one side of the floor along the up-down direction of the vehicle, the seat being located on the other side of the floor along the up-down direction of the vehicle, and the through hole of the battery being oriented toward the other side of the up-down direction of the vehicle. A projection of the seat onto the battery along the vertical direction of the vehicle is located outside the range of the through hole.

27. The electrical device according to claim 25 or 26, wherein: The vehicle includes at least one seat row, wherein the seat row includes at least two seats arranged along the left-right direction of the vehicle. Along the left-right direction of the vehicle, the through holes are located between adjacent seats in the same seat row, and / or the through holes are located on both sides of the same seat row in the left-right direction of the vehicle.

28. An energy storage device, wherein: A battery comprising the battery according to any one of claims 1 to 23, wherein the battery is configured to store and provide electrical energy.

Images