Battery, power utilization device and energy storage device

Abstract

The utility model discloses a battery, a power utilization device and an energy storage device, the battery comprises at least one battery monomer, and the battery monomer comprises a pole; the accommodating box is internally provided with an accommodating cavity, each battery monomer is accommodated in the accommodating cavity, the accommodating box comprises a box wall and a sealing cover, the box wall is provided with a through hole, and the sealing cover is detachably mounted on the box wall and covers the through hole; and along the thickness direction of the box wall, at least part of the projection of the pole falls into the range of the through hole. According to the battery provided by the embodiment of the utility model, the through hole is formed in the box wall, so that the interior of the battery can be communicated with the outside, and the interior of the battery can be conveniently overhauled. And the sealing cover is detachably mounted on the box wall to isolate the accommodating cavity from the outside, so that the battery monomers work in a stable environment. The power utilization device and the energy storage device provided by the invention are easy to overhaul due to the adoption of the battery provided by the invention.

Description

Technical Field

[0001] The present application relates to the field of battery technology, and in particular to batteries, electrical devices and energy storage devices. Background Art

[0002] With the promotion and popularization of the concept of green development, 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 the field of energy storage.

[0003] Battery manufacturing requires more than just capacity requirements. It also requires the control of battery charging and discharging, operating temperature, and operating status. In addition to battery cells, the battery also has electrical components such as busbars, sampling structures, battery management systems, and high-voltage distribution units.

[0004] However, components inside the battery are prone to damage, such as busbars and electrical kits, and need to be repaired in a timely manner. Therefore, how to facilitate the maintenance of the battery is one of the industry's needs. Utility Model Content

[0005] In order to solve the above technical problems, the present application provides a battery, an electrical device and an energy storage device, which can facilitate the maintenance of the internal electrical kit.

[0006] In a first aspect, the present application provides a battery, comprising: at least one battery cell, the battery cell comprising a pole; a containing box, the containing box having a containing cavity, each of the battery cells being contained in the containing cavity, the containing 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.

[0007] The battery in the embodiment of the present application, since the storage box includes a box wall, and the box wall is provided with a through hole, so that the inside of the battery can be connected with the outside world, therefore, the maintenance personnel can realize the maintenance of the inside of the battery through the through hole. The storage box includes a closed cover, which is detachably mounted on the box wall. When the closed 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 influence of the external environment on the battery cell, so that the battery cell works in a stable environment; when the closed cover is removed from the through hole, the inside of the battery is connected with the outside world through the through hole for the maintenance of the inside 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, the maintenance personnel can directly inspect at least part of the pole through the through hole. Since the battery cell is contained in the storage cavity of the storage box, the storage box can protect the battery cell. Maintenance can be carried out by simply disassembling the closed cover, which is convenient to use and simple in structure.

[0008] In some embodiments, a box body having an opening at one end and a cover body for closing the opening of the box body are formed by a box wall of the containing box, and the through hole is opened in the box body and / or the cover body.

[0009] Since the box wall of the storage box forms a box body with an opening at one end, during processing, the processed battery cell can be placed in the storage cavity from the opening, and the battery cell and the storage cavity can be processed from the opening, which is convenient for meeting diverse processing needs. Since the box wall of the storage box forms a cover body for closing the opening, the cover body is used to close the box body after processing, so that the battery cell is isolated from the outside world, the influence of the external environment on the battery cell is reduced, and the battery cell works in a stable environment. Since the through hole can be opened in the box body and / or the cover body, it can be applied to the situation where the pole of the battery cell faces the box body and / or the cover body.

[0010] In some embodiments, the battery further comprises a busbar, which is used to connect poles of two battery cells, and 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.

[0011] Since the battery also includes a busbar, the poles of the battery cells can be connected via the busbar. Since the projection of the busbar at least partially falls within the range of the through hole along the thickness direction of the box wall, at least part of the busbar can be exposed to the outside through the through hole, so as to facilitate the inspection and maintenance of the busbar.

[0012] In some embodiments, the battery also 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.

[0013] Since the battery also includes an electrical kit, 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, so at least part of the electrical kit can be exposed to the outside through the through hole to achieve maintenance of the electrical kit. Since the electrical kit includes at least one of the sampling structure, the battery management system, the relay, and the high-voltage distribution unit, at least one of the sampling structure, the battery management system, the relay, and the high-voltage distribution unit can be maintained through the through hole.

[0014] 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 being perpendicular to an 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.

[0015] By arranging the battery cells and the poles along the first direction, the positions of the poles are more regular, and the opening of the through holes can be more regular. Since the projection of the poles 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 holes, at least part of the poles and the electrical kit can be exposed to the outside through the through holes for easy maintenance.

[0016] 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 more than two battery cells arranged in parallel along a second direction, the first direction is perpendicular to an extension direction of the battery cell, the second direction is perpendicular to the first direction, and two battery cells adjacent to each other 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.

[0017] Since the two battery cells adjacent to each other along the second direction are arranged in parallel with the poles close to each other, the poles are arranged more concentratedly. Therefore, the through holes opened corresponding to the poles can be opened more concentratedly, and the through holes located at similar positions can be integrated into one through hole, thereby saving the process of setting through holes and closing covers. Since the two battery cells adjacent to each other along the second direction are arranged in parallel with the poles far away from each other, the poles located on the same side of the battery cells in the second direction are arranged more concentratedly. 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 projection of the poles 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, at least part of the poles and the electrical kit can be exposed to the outside through the through hole for easy maintenance.

[0018] 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.

[0019] 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.

[0020] In some embodiments, the battery cell unit includes two battery cells, and the length dimension of the battery cells in each of the battery cell units in the second direction is in a range of 350 mm to 700 mm.

[0021] 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.

[0022] In some embodiments, there are multiple through holes, and one or more closing covers are provided corresponding to each through hole.

[0023] Thus, the through hole can be set at the position that needs to be inspected outside the pole, meeting the various inspection position requirements of the battery cell. The closed cover is set corresponding to the through hole, and when not being inspected, it can isolate the battery from the external environment, so that the battery can work in a closed and stable environment.

[0024] In some embodiments, the projection area of ​​the through hole along the thickness direction of the box wall does not exceed 30% of the projection area of ​​the box wall where the through hole is formed along the thickness direction of the box wall.

[0025] By limiting the area of ​​the through hole to 30% of the area of ​​the box wall provided with the through hole, the maintenance requirements for at least part of the poles can be met, while the structural strength of the box wall can be prevented from being affected by an excessively large area of ​​the through hole.

[0026] 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.

[0027] Since 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, since 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.

[0028] In some embodiments, the length of the through hole along the first direction is no greater than 500 mm.

[0029] 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.

[0030] In some embodiments, a length of the through hole along the first direction is in a range of 50 mm to 300 mm.

[0031] 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 opening area being too large to affect the structural strength of the box wall.

[0032] In some embodiments, a sealing member is disposed around the through hole, and the sealing member is used to seal between the through hole and the closing cover.

[0033] 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.

[0034] In some embodiments, the closure cover is mounted on the box wall by screws, or the closure cover is slidably snap-connected to the box wall, or the closure cover is hinged to the box wall.

[0035] The closure cover is installed on the box wall by screws, the screws are fixed firmly, and the disassembly can be achieved by simply turning the screws, with a simple structure, convenient operation, and time and labor saving. The closure cover can be slidably clamped on the box wall, which is convenient to slide and quick to disassemble. The closure cover is hinged to the box wall, and the closure cover can be partially disassembled by rotating, which saves effort to open and close, and is quick to disassemble.

[0036] In some embodiments, the box wall on which the through hole is formed has a boss, and the boss is formed by the box wall bulging in a direction away from the battery cell. The through hole is opened on the wall surface of the boss facing the battery cell, and the boss forms a accommodating portion on the side facing the battery cell, and at least a portion of the electrical kit is located in the accommodating portion.

[0037] Since the boss is formed by the box wall protruding in the direction away from the battery cell, the inside of the boss has space for accommodating the portion of the battery cell protruding from the surface. Since the through hole is opened on the wall of the boss facing the battery cell, at least a part of the pole is accommodated in the accommodating portion. Since at least a part of the electrical kit is located in the accommodating portion, the space occupied by the electrical kit in the accommodating cavity is reduced, which helps to reduce the volume of the accommodating box.

[0038] 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.

[0039] Thus, at least a portion of the electrical kit is placed in the accommodation space of the closing cover, reducing the space of the accommodation cavity occupied by the electrical kit, which helps to reduce the volume of the accommodation box. In addition, the accommodation space of the closing cover and the accommodation portion of the boss can overlap with each other to form a larger space, which can accommodate more poles and electrical kits, etc., further reducing the space of the accommodation cavity occupied by the portion of the battery cell protruding from the surface.

[0040] In some embodiments, the closing cover is configured in a flat plate shape.

[0041] Therefore, the structure is simple and easy to process.

[0042] In some embodiments, the pole and part or all of the electrical kit are located in the receiving portion.

[0043] As a result, the space occupied by at least part of the poles and the electrical kit in the accommodating cavity is reduced, which helps to reduce the volume of the accommodating box.

[0044] 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.

[0045] 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 arranged will not interfere with the pole, thereby reducing the risk of the pole being connected and conducting 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 provide a heat exchange component accommodating space with a suitable height as needed.

[0046] 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 with an interval between them.

[0047] 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.

[0048] In some embodiments, the number of the protrusions is one, the positive electrode column and the negative electrode column are spaced apart from each other on the protrusions, 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.

[0049] The positive pole and the negative pole are arranged on the same protrusion, and the positive pole and the negative pole are arranged in a way that the line connecting the two poles is parallel to the extension direction of the battery cell, or the positive pole and the negative pole are arranged in a way that the line connecting the two poles is perpendicular to the extension direction of the battery cell, so that the arrangement is more regular and convenient for later maintenance. In addition, the protrusion area for setting the two poles is larger, which helps to improve the strength of the pole setting part in the battery cell.

[0050] In some embodiments, at least two of the protrusions are spaced apart from each other, the positive electrode column is disposed on one of the protrusions, and the negative electrode column is disposed on another of the protrusions.

[0051] Since at least two protrusions are provided, and the positive pole and the negative pole are respectively provided on different protrusions, there is a large distance between the positive pole and the negative pole, 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.

[0052] In a second aspect, the present application further provides an electrical device, the electrical device comprising the battery as described above, the battery serving as a power source for the electrical device.

[0053] Since the electric device includes a battery that is easy to inspect, when the electric device operates abnormally, the battery can be quickly inspected by removing the closing cover. After the inspection is completed, the closing cover can be put back to restore it to its original state. This saves time and effort and reduces the maintenance burden on workers.

[0054] 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 arranged 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.

[0055] Since part of the battery box wall is formed as the floor of the vehicle, it is possible to save space in the vertical direction of the vehicle, which helps to improve the energy density of the battery. Since the through hole penetrates the floor to expose the battery cells, and the projection of the seat on the battery along the vertical direction of the vehicle is outside the range of the through hole, the seat does not block the through hole. There is no need to move or disassemble the seat during maintenance, and the battery can be directly inspected from inside the vehicle, saving time and effort. By detachably mounting the closing cover on the floor and covering the through hole, the battery cells are isolated from the interior of the vehicle, which is dustproof and waterproof, and can prevent users from direct contact with the battery cells, reducing the risk of electric shock for users.

[0056] 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.

[0057] Since the through hole runs through the bottom plate and the box wall, 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, the seat does not block the through hole, and the battery can be inspected directly from the inside of the vehicle without moving or removing the seat during maintenance, saving time and effort. By detachably installing the closing cover on the bottom plate and covering the through hole, the battery cell is isolated from the inside of the vehicle, avoiding direct contact between the user and the battery cell, and reducing the risk of electric shock for the user.

[0058] 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, 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.

[0059] Therefore, when maintenance is carried out through the through hole, the seat does not block the through hole, which is convenient for maintenance without removing the seat and has little impact on the interior of the vehicle.

[0060] In a third aspect, the present application further provides an energy storage device, which includes the battery as described above, and the battery is configured to store electrical energy and provide electrical energy.

[0061] Since the energy storage device includes an internal battery that is easy to inspect, when the energy storage device operates abnormally, the battery can be quickly inspected by removing the closing cover. After the inspection is completed, the closing cover can be put back to restore it to its original state. This saves time and effort and reduces the maintenance burden on workers.

[0062] The above description is only an overview of the technical solution of the present application. In order to more clearly understand the technical means of the present application, it can be implemented in accordance with the contents of the specification. In order to make the above and other purposes, features and advantages of the present application more obvious and easy to understand, the specific implementation methods of the present application are listed below. BRIEF DESCRIPTION OF THE DRAWINGS

[0063] Various other advantages and benefits will become apparent to those of ordinary skill in the art by reading the detailed description of the preferred embodiments below. The accompanying drawings are only for the purpose of illustrating the preferred embodiments and are not to be considered as limiting the present application. Moreover, the same reference numerals are used throughout the drawings to represent the same components. In the drawings:

[0064] Figure 1 A schematic diagram of a battery cell provided with poles on both sides in a second direction provided in some embodiments of the present application;

[0065] Figure 2 A schematic diagram of a battery cell with a pole in the middle provided for some embodiments of the present application;

[0066] Figure 3 A schematic diagram of a battery cell with a protrusion in the middle provided for some embodiments of the present application;

[0067] Figure 4 A schematic diagram of battery cells arranged along a first direction with poles provided on both sides of a second direction provided in some embodiments of the present application;

[0068] Figure 5 A schematic diagram of battery cells with protrusions in the middle arranged along a first direction provided in some embodiments of the present application;

[0069] Figure 6 An exploded view of a protrusion, a busbar and an electrical assembly provided in the middle for some embodiments of the present application;

[0070] Figure 7 A schematic diagram of battery cells arranged along a first direction with protrusions on both sides of a second direction provided in some embodiments of the present application;

[0071] Figure 8 A schematic diagram of battery cells arranged along a first direction with protrusions and current collectors on both sides of the battery cells in a second direction provided in some embodiments of the present application;

[0072] Fig. 9 A schematic diagram of a battery cell provided in some embodiments of the present application being placed in a box;

[0073] Fig.10 An exploded view of a battery with a through hole provided in a cover body according to some embodiments of the present application;

[0074] Fig.11 An exploded view of a battery with a through hole provided in a box body according to some embodiments of the present application;

[0075] Fig.12 An exploded view of a battery with two through holes and a boss provided in a cover body according to some embodiments of the present application;

[0076] Fig.13 A schematic diagram of a closure cover provided in some embodiments of the present application being slidably engaged with a box wall;

[0077] Fig.14 A schematic diagram of a closure cover provided in some embodiments of the present application being mounted on a box wall by screws;

[0078] Fig.15 A schematic diagram of a closure cover hinged to a box wall provided in some embodiments of the present application;

[0079] Fig.16 An exploded view of a closure cover hinged to a box wall provided in some embodiments of the present application;

[0080] Fig.17 An exploded view of a battery provided with a heat exchange assembly according to some embodiments of the present application;

[0081] Fig.18 For this application Fig.17 Side view in;

[0082] Fig.19 For this application Fig.17 A top view of the

[0083] Fig. 20 For this application Fig.19 A cross-sectional view along the AA direction in FIG.

[0084] Fig.21 For this application Fig. 20 A partial enlarged view of part B;

[0085] Fig. 22 An exploded view of an electrical kit arrangement corresponding to a boss provided in some embodiments of the present application;

[0086] Fig.23 A schematic diagram showing that the closure cover provided in some embodiments of the present application is configured as a convex shape;

[0087] Fig.24 A side view of a battery provided with a boss provided in some embodiments of the present application;

[0088] Fig.25 For this application Fig.24 A cross-sectional view along the CC direction in FIG.

[0089] Fig.26 For this application Fig.25 A partial enlarged view of part D in the middle;

[0090] Fig. 27 A schematic diagram of a battery provided in some embodiments of the present application being installed in a vehicle;

[0091] Fig.28 A schematic diagram of a battery with a boss provided in some embodiments of the present application being installed on a vehicle;

[0092] Fig.29 For this application Fig.28 A schematic diagram from another perspective;

[0093] Fig.30 A top view of a battery provided with a boss provided in some embodiments of the present application installed on a vehicle;

[0094] Fig.31 For this application Fig.30 Cross-sectional view along EE direction.

[0095] Description of Reference Numerals

[0096] 10. Battery cell; 101. Pole; 102. Protrusion; 11. Receiving 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 assembly; 15. Seat; X. First direction; Y. Second direction (left and right direction of vehicle); Z. Up and down direction of vehicle. DETAILED DESCRIPTION

[0097] The following embodiments of the technical solution of the present application are described in detail in conjunction with the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the present application, and are therefore only used as examples, and cannot be used to limit the scope of protection of the present application.

[0098] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by technicians in the technical field to which this application belongs; the terms used herein are only for the purpose of describing specific embodiments and are not intended to limit this application; the terms "including" and "having" and any variations thereof in this application are intended to cover non-exclusive inclusions.

[0099] In the description of the embodiments of the present application, the technical terms "first", "second", "third", etc. are only used to distinguish different objects, and cannot be understood as indicating or implying relative importance or implicitly indicating the number, specific order or primary and secondary relationship of the indicated technical features. In the description of the embodiments of the present application, the meaning of "multiple" is more than two, unless otherwise clearly and specifically defined.

[0100] Reference to "embodiments" herein means that a particular feature, structure, or characteristic described in conjunction with the embodiments may be included in at least one embodiment of the present application. The appearance of the phrase in various locations in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0101] In the description of the embodiments of the present application, the term "and / or" is only a description of the association relationship of associated objects, indicating that three relationships may exist. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. In addition, the character " / " in this article generally indicates that the associated objects before and after are in an "or" relationship.

[0102] In the description of the embodiments of the present application, the orientation or position relationship indicated by technical terms such as "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside" and "outside" are based on the orientation or position relationship shown in the accompanying drawings. They are only for the convenience of describing the embodiments of the present application and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed, operated or used in a specific orientation. Therefore, they should not be understood as limitations on the embodiments of the present application.

[0103] In the description of the embodiments of the present application, unless otherwise clearly specified and limited, technical terms such as "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, and it can be the internal connection of two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the embodiments of the present application can be understood according to the specific circumstances.

[0104] In the description of the embodiments of the present application, unless otherwise clearly specified and limited, the technical term "contact" should be understood in a broad sense, and may be direct contact or contact through an intermediate medium layer. It may be contact with essentially no interaction force between the two contacting parties, or it may be contact with interaction force between the two contacting parties.

[0105] At present, new energy batteries are increasingly used in life and industry. New energy batteries are not only used in energy storage power systems such as hydropower, thermal power, wind power and solar power stations, but are also widely used in electric vehicles such as electric bicycles, electric motorcycles, electric cars, as well as in aerospace and other fields.

[0106] Fig. 27A schematic diagram of the structure of a vehicle provided for one embodiment of the present application. The vehicle may be a fuel vehicle, a gas vehicle or a new energy vehicle, and the new energy vehicle may be a pure electric vehicle, a hybrid vehicle or an extended-range vehicle, etc. A battery is provided inside the vehicle, and the battery may be provided at the bottom, head or tail of the vehicle. The battery may be used to power the vehicle, for example, the battery may be used as an operating power source for the vehicle. The vehicle may also include a controller and a motor, and the controller is used to control the battery to power the motor, for example, for starting, navigating and operating power requirements of the vehicle during driving.

[0107] In some embodiments of the present application, the battery can be used not only as an operating power source for the vehicle, but also as a driving power source for the vehicle, replacing or partially replacing fuel or natural gas to provide driving power for the vehicle.

[0108] In the embodiments of the present application, the battery may be a battery cell. A battery cell refers to a basic unit that can realize the mutual conversion between chemical energy and electrical energy, and can be used to make a battery module or a battery pack, so as to supply power to an electrical device. A battery cell may be a secondary battery, which refers to a battery cell that can be continuously used by activating the active material by charging after the battery cell is discharged. 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-hydrogen battery, a nickel-cadmium battery, a lead-acid battery, etc., and the embodiments of the present application do not limit this.

[0109] A battery cell generally includes an electrode assembly. The electrode assembly includes a positive electrode, a negative electrode, and a separator. During the charge and discharge process of the battery cell, active ions (such as lithium ions) are embedded and removed between the positive electrode and the negative electrode. The separator is set between the positive electrode and the negative electrode to prevent the positive and negative electrodes from short-circuiting, while allowing active ions to pass through.

[0110] 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 application has no specific restrictions on the type of electrolyte, which can be selected according to needs. The electrolyte can be liquid, gel or solid.

[0111] In some embodiments, the 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 (such as polypropylene), a composite metal housing (such as a copper-aluminum composite housing), or an aluminum-plastic film.

[0112] 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 this application.

[0113] In some embodiments, the housing includes an end cap and a shell, the shell is provided with an opening, and the end cap closes the opening to form a closed space for accommodating substances such as the electrode assembly and the electrolyte. The shell may be provided with one or more openings. One or more end caps may also be provided.

[0114] In the embodiment of the present application, the battery may also be a single physical module (eg, 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 connection through a busbar.

[0115] 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 this application.

[0116] In the embodiment of the present application, the battery may also be a single physical module (eg, 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 connection through a busbar.

[0117] In the description of the embodiments of the present application, for the convenience of explanation, Fig.17 and Fig. 27 As shown by the arrows in , the direction of arrow X is the first direction and the vehicle travel direction, the direction of arrow Y is the second direction and the left-right direction of the vehicle, the direction of arrow Z is the up-down direction of the vehicle, and the direction indicated by arrow Z along the vertical direction is called "up", and the opposite direction is called "down".

[0118] Below, this application is described in detail.

[0119] With the promotion and popularization of the concept of green development, 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 the field of energy storage.

[0120] Battery manufacturing requires more than just capacity requirements. It also requires the control of battery charging and discharging, operating temperature, and operating status. In addition to battery cells, the battery also has electrical components such as busbars, sampling structures, battery management systems, and high-voltage distribution units.

[0121] However, components inside the battery are prone to damage, such as busbars and electrical kits, and need to be repaired in a timely manner. Therefore, how to facilitate the maintenance of the battery is one of the industry's needs.

[0122] The inventor of the present application hopes to develop a structure that facilitates battery maintenance, thereby simplifying the battery maintenance steps and improving the battery maintenance efficiency.

[0123] Based on such a design concept, the inventor of the present application designed a battery, comprising: at least one battery cell, the battery cell comprising a pole; a containing box, a containing cavity is provided in the containing box, each battery cell is accommodated in the containing cavity, the containing box comprises a box wall and a closing cover, the box wall is provided with a through hole, the closing cover is detachably mounted on the box wall and covers 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.

[0124] Since the storage box includes a box wall, and a through hole is provided on the box wall, so that the inside of the battery can be connected with the outside world, the maintenance personnel can realize the maintenance of the inside of the battery through the through hole. The storage box includes a closed cover, which is detachably mounted on the box wall. When the closed 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 influence of the external environment on the battery cell and making the battery cell work in a stable environment; when the closed cover is removed from the through hole, the inside of the battery is connected with the outside world through the through hole for the maintenance of the inside 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, the maintenance personnel can directly inspect at least part of the pole through the through hole. Since the battery cell is accommodated in the storage cavity of the storage box, the storage box can protect the battery cell. Maintenance can be carried out by simply disassembling the closed cover, which is convenient to use and simple in structure.

[0125] The following is a description with reference to the accompanying drawings.

[0126] Figure 1 A schematic diagram of a battery cell provided with poles on both sides in a second direction provided in some embodiments of the present application; Figure 2 A schematic diagram of a battery cell with a pole in the middle provided for some embodiments of the present application;

[0127] Figure 3 A schematic diagram of a battery cell with a protrusion in the middle provided for some embodiments of the present application; Figure 4 A schematic diagram of battery cells arranged along a first direction with poles provided on both sides of a second direction provided in some embodiments of the present application; Figure 5 A schematic diagram of battery cells with protrusions in the middle arranged along a first direction provided in some embodiments of the present application; Figure 6 An exploded view of a protrusion, a busbar and an electrical assembly provided in the middle for some embodiments of the present application; Figure 7 A schematic diagram of battery cells arranged along a first direction with protrusions on both sides of a second direction provided in some embodiments of the present application; Figure 8 A schematic diagram of battery cells arranged along a first direction with protrusions and current collectors on both sides of the battery cells in a second direction provided in some embodiments of the present application; Fig. 9 A schematic diagram of a battery cell provided in some embodiments of the present application being placed in a box; Fig.10 An exploded view of a battery with a through hole provided in a cover body according to some embodiments of the present application; Fig.11 An exploded view of a battery with a through hole provided in a box body according to some embodiments of the present application; Fig.12 An exploded view of a battery with two through holes and a boss provided in a cover body according to some embodiments of the present application; Fig.13 A schematic diagram of a closure cover provided in some embodiments of the present application being slidably engaged with a box wall; Fig.14 A schematic diagram of a closure cover provided in some embodiments of the present application being mounted on a box wall by screws; Fig.15 A schematic diagram of a closure cover hinged to a box wall provided in some embodiments of the present application; Fig.16 An exploded view of a closure cover hinged to a box wall provided in some embodiments of the present application; Fig.17 An exploded view of a battery provided with a heat exchange assembly according to some embodiments of the present application; Fig.18 For this application Fig.17 Side view in; Fig.19 For this application Fig.17 A top view of the Fig. 20 For this application Fig.19 A cross-sectional view along the AA direction in FIG. Fig.21 For this application Fig. 20 A partial enlarged view of part B; Fig. 22 An exploded view of an electrical kit arrangement corresponding to a boss provided in some embodiments of the present application; Fig.23 A schematic diagram showing that the closure cover provided in some embodiments of the present application is configured as a convex shape; Fig.24 A side view of a battery provided with a boss provided in some embodiments of the present application; Fig.25 For this application Fig.24 A cross-sectional view along the CC direction in FIG.

[0128] Fig.26 For this application Fig.25 A partial enlarged view of part D in the middle; Fig. 27 A schematic diagram of a battery provided in some embodiments of the present application being installed in a vehicle; Fig.28 A schematic diagram of a battery with a boss provided in some embodiments of the present application being installed on a vehicle; Fig.29 For this application Fig.28 A schematic diagram from another perspective; Fig.30 A top view of a battery provided with a boss provided in some embodiments of the present application installed on a vehicle; Fig.31 For this application Fig.30 Cross-sectional view along EE direction.

[0129] First, as Fig.10As shown, the present application provides a battery, comprising: at least one battery cell 10, the battery cell 10 comprising a pole 101; a receiving box 11, the receiving box 11 having a receiving cavity, each battery cell 10 being received in the receiving cavity, the receiving 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.

[0130] The containing box 11, i.e., the box body 1111 forming the outer contour of the battery, is used to contain other components of the battery except the containing box 11, thereby providing installation and fixing space for other components, and at the same time, plays a role of sealing and protection, and reduces the adverse effects of collision with external objects and entry of foreign matter on the normal operation of the battery during the transportation and use of the battery.

[0131] The box wall 111 refers to each wall surface of the receiving box 11 that surrounds the receiving cavity. Every two wall surfaces are opposite and separated. The receiving cavity is between the two wall surfaces, and the outside of the two wall surfaces that are away from each other is the external environment. In other words, of the two opposite surfaces of each box wall 111, one surface forms the inner wall surface of the receiving cavity, and the other surface forms the outer surface of the receiving box 11.

[0132] The pole 101 is disposed on the surface of the battery cell 10 and is used to be electrically connected to the components for realizing electrochemical reactions in the battery cell 10 , so as to output or input electric energy into or into the battery cell 10 through the pole 101 .

[0133] The thickness direction of the box wall 111 is the direction in which the box wall 111 is away from the accommodating cavity.

[0134] The storage box 11 includes a box wall 111. Optionally, the box wall 111 is constructed as a hollow box body 1111, and the six wall surfaces of the box body 1111 can be 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 surround the storage cavity; or, the box body 1111 with an opening at one end is connected to a cover body 1112 that closes the opening to form the box wall 111, and the closed cover 112 and the box body 1111 surround the storage cavity.

[0135] Alternatively, the box wall 111 is constructed as a box body 1111 with an opening at one end, and the box body 1111 has a receiving cavity, and the battery cell 10 placed in the receiving cavity is exposed to the outside. When the battery is set in an electrical device, a part of the electrical device forms a cover body 1112 that closes the opening to achieve the sealing of the receiving cavity.

[0136] like Figure 1 , Figure 2 and Figure 4As shown, the battery cell 10 is constructed in a rectangular parallelepiped, and the extension direction of the battery cell 10 is parallel to the direction of the longest side of the battery cell 10. A pole 101 is provided on the surface of the battery cell 10. When there is one battery cell 10, the pole 101 can be arranged on any surface of the battery cell 10. When there are two battery cells 10, the two battery cells 10 can be arranged along the first direction X or along the second direction Y, and the pole 101 is not arranged on the adjacent surfaces of the two battery cells 10, and the pole 101 is respectively arranged 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, and no pole 101 is arranged between each two adjacent battery cells 10, and the pole 101 is arranged in the space between each battery cell 10 and the box wall 111. Among them, 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.

[0137] The storage box 11 also includes a closing cover 112. A through hole 113 may be provided on any surface of the storage box 11, and the through hole 113 is provided through the box wall 111, so that the storage chamber is interconnected with the outside world, so that a part of the battery cell 10 placed in the storage chamber is exposed to the outside world. A closing cover 112 is provided at the through hole 113, and the size of the closing cover 112 is not less 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, magnetic attraction, 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.

[0138] Along the thickness direction of the box wall 111, part of the projection of the pole 101 can 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, all of the projection of the pole 101 can fall within the range of the through hole 113, so that all of the poles 101 can be exposed to the outside world for easy maintenance.

[0139] Since the storage box 11 includes a box wall 111, and a through hole 113 is provided on the box wall 111, so that the inside of the battery can be connected to the outside world, the maintenance personnel can perform maintenance inside the battery through the through hole 113. The storage box 11 includes a closed cover 112, which is detachably mounted on the box wall 111. When the closed cover 112 is mounted on the through hole 113, it can close 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, so that the battery cell 10 can work in a stable environment; when the closed cover 112 is removed from the through hole 113, the inside of the battery is connected to the outside world through the through hole 113, so as to be used for maintenance of the inside of the battery. Since at least part of the projection of the pole 101 falls within the range of the through hole 113 along the thickness direction of the box wall 111, the maintenance personnel can directly inspect at least part of the pole 101 through the through hole 113. Since the battery cell 10 is contained in the containing cavity of the containing box 11, the containing box 11 can protect the battery cell 10. The battery cell 10 can be inspected and repaired by only disassembling the sealing cover 112, which is convenient to use and simple in structure.

[0140] In some embodiments, Figures 10 to 12 , Fig.17 , Fig. 22 As shown, a box body 1111 with 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.

[0141] The box wall 111 forms a box body 1111 and a cover body 1112. The box body 1111 with an opening at one end is composed of five plate-like surfaces. The plate-like surface structure is rectangular. Four plate-like surfaces are perpendicular and arranged around one plate-like surface to form a box body 1111 with an opening at one end having a receiving cavity. The cover body 1112 covers the opening of the box body 1111 and can close the opening. The through hole 113 can be opened on any of the five surfaces of the box body 1111, and can also be opened on the cover body 1112.

[0142] Since the box wall 111 of the receiving 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 receiving cavity from the opening, and the battery cell 10 and the receiving cavity can be processed from the opening, which is convenient for meeting diverse processing needs. Since the box wall 111 of the receiving box 11 forms a cover body 1112 for closing the opening, the cover body 1112 is used to close the box body 1111 after processing, so that the battery cell 10 is isolated from the outside world, the influence of the external environment on the battery cell 10 is reduced, and the battery cell 10 works in a stable environment. Since the through hole 113 can be opened in the box body 1111 and / or the cover body 1112, it can be applied to the situation where the pole 101 of the battery cell 10 faces the box body 1111 and / or the cover body 1112.

[0143] In some embodiments, Figure 8 , Fig.21 , Fig.26 As shown, the battery further 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 .

[0144] The busbar 12 is used to electrically connect the plurality of battery cells 10 so as to realize series connection or parallel connection between the battery cells 10 .

[0145] It should be noted that the specific structure of the busbar 12 and the method of realizing the series and parallel connection between the battery cells 10 have been applied in the relevant technology and will not be elaborated here.

[0146] The plurality of battery cells 10 are arranged along the first direction X and / or the second direction Y, and the surface between each two adjacent battery cells 10 is not provided with a pole 101. Similarly, the surface between each two adjacent battery cells 10 is not provided with a busbar 12, and the busbar 12 is provided between the surface of the battery cell 10 and the box wall 111. Specifically, the busbar 12 is provided on the surface of the battery cell 10 on which the pole 101 is provided.

[0147] Along the thickness direction of the box wall 111, part of the projection of the current collector 12 can fall within the range of the through hole 113, so that the part of the current collector 12 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 entire projection of the current collector 12 can fall within the range of the through hole 113, so that the part of the current collector 12 falling within the range of the through hole 113 can be exposed to the outside world for easy maintenance.

[0148] Since the battery further includes a busbar 12, the poles 101 of the battery cell 10 can be connected through 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 part of the busbar 12 can be exposed to the outside through the through hole 113, so as to facilitate the inspection and maintenance of the busbar 12.

[0149] In some embodiments, Figure 6 , Fig. 9 , Fig.12 , Fig.17 , Fig.18 , Fig.21 , Fig. 22 and Fig.26 As shown, 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.

[0150] The electrical kit 13 is a variety of electrical components in the battery used to control the input or output of electrical energy into or out of the battery.

[0151] 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 according to its operating status to prevent the battery from overcharging and over-discharging, so as to extend the battery life.

[0152] Relay, 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.

[0153] The high-voltage distribution unit is used to monitor the high-voltage connection status and insulation status of the battery in real time, so as to manage the safety of high-voltage electricity use in the battery.

[0154] 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 enable the battery to charge and discharge safely and efficiently.

[0155] Along the thickness direction of the box wall 111, the projection of the electrical assembly 13 can fall within the range of the through hole 113, so that the portion of the electrical assembly 13 falling 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 entire projection of the electrical assembly 13 can fall within the range of the through hole 113, so that the portion of the electrical assembly 13 falling within the range of the through hole 113 can be exposed to the outside for easy maintenance.

[0156] It should be noted that the specific structures of the sampling structure, battery management system, relay, and high-voltage distribution unit and the principles for realizing corresponding functions have been applied in related technologies and will not be elaborated here.

[0157] Since the battery further includes an electrical kit 13, 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, so at least part of the electrical kit 13 can be exposed to the outside through the through hole 113 to achieve maintenance of the electrical kit 13. Since the electrical kit 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.

[0158] In some embodiments, Figures 4 to 12 , Fig.17 , Fig. 22 As shown, in the accommodating cavity, a plurality of battery cells 10 are arranged along a first direction X to form a battery cell group, 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, 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.

[0159] The extending direction of the battery cell 10 refers to the extending direction of the longest side of the battery cell 10 .

[0160] The first direction X refers to a direction perpendicular to the extending direction of the battery cell 10 .

[0161] A plurality of battery cells 10 are arranged along a first direction X to form a battery cell group. A pole 101 is disposed on each battery cell 10 . No pole 101 is disposed on the two side surfaces of the battery cell 10 in the first direction X. The pole 101 is disposed on the surface of the battery cell group.

[0162] Optionally, the poles 101 are arranged at similar or identical positions in each battery cell 10. The poles 101 are arranged along the first direction X, and the connection lines between the poles 101 are approximately strip-shaped extending along the first direction X. The through holes 113 are arranged in an extending direction parallel to the first direction X, and the projection of the poles 101 along the thickness direction of the box wall 111 partially or completely falls within the range of the through holes 113.

[0163] Also optionally, the poles 101 on some battery cells 10 are arranged at different positions. The battery cells 10 whose poles 101 are arranged on the same side surface of the battery cells 10 are arranged adjacent to each other, and the poles 101 on the battery cell group are arranged along the first direction X. One or more through holes 113 are arranged on the box wall 111, so that the projection of the pole 101 along the thickness direction of the box wall 111 at least partially falls within the range of the through hole 113.

[0164] Furthermore, the electrical kit 13 may be entirely disposed in the space between the pole 101 and the through hole 113, so that the projection of the electrical kit 13 along the thickness direction of the box wall 111 falls entirely within the range of the through hole 113, and there is no need to provide an additional through hole 113 for the corresponding electrical kit 13. The electrical kit 13 may also be partially disposed in the space between the pole 101 and the through hole 113, so that the projection of the electrical kit 13 along the thickness direction of the box wall 111 falls partially within the range of the through hole 113, and the maintenance of part of the electrical kit 13 is achieved through the through hole 113. The electrical kit 13 may also be disposed on the surface of the battery cell group without the pole 101, and the through hole 113 may be disposed on the surface of the battery cell group corresponding to the battery cell group where the electrical kit 13 is disposed. The through hole 113 may be disposed to expose at least a portion of each electrical kit 13, or may be disposed to expose at least one electrical kit 13 among the multiple electrical kits 13, and the projection of the electrical kit 13 along the thickness direction of the box wall 111 at least partially falls within the range of the through hole 113.

[0165] By arranging the battery cells 10 and the poles 101 along the first direction X, the positions of the poles 101 are relatively regular, and the openings of the through holes 113 can be relatively regular. Since the projection of the poles 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 holes 113, at least a portion of the poles 101 and the electrical kit 13 can be exposed to the outside through the through holes 113 for easy maintenance.

[0166] In some embodiments, in the accommodating cavity, a plurality of battery cell units are arranged along a first direction X to form a battery cell group, and the battery cell unit includes more than two 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, the second direction Y is perpendicular to the first direction X, and two battery cells 10 adjacent to each other along the second direction Y are arranged in parallel with the poles 101 close to each other or in parallel with the poles 101 away from each other, and, in the battery cell group, the poles 101 are arranged along the first direction X, the through hole 113 is located at a position corresponding to the pole 101 along the thickness direction of the box wall 111, and 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.

[0167] 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.

[0168] The 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 it in the second direction Y. A plurality of battery cell units are arranged along the first direction X to form a battery cell group, and the battery cells 10 in the battery cell group are arranged in a matrix.

[0169] Optionally, the pole 101 is disposed on a surface of the battery cell 10 parallel to the first direction X and the second direction Y, and the pole 101 is located close to the surface on one side of the second direction Y. In the second direction Y, the battery cells 10 are arranged in parallel with the poles 101 being 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.

[0170] Specifically, when the number of battery cells 10 included in the battery cell unit is an even number, the sides of the poles 101 of every two battery cells 10 are arranged close to each other. The poles 101 close to each other are arranged along the first direction X to form at least one strip area where the poles 101 are concentrated, and a through hole 113 extending along the first direction X can be provided for each of the areas; or a through hole 113 extending along the first direction X can be provided for at least one of the areas or part of the areas, so that the projection of the pole 101 along the thickness direction of the box wall 111 at least partially falls within the range of the through hole 113.

[0171] 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 extra 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 extra battery cells 10 are arranged along the first direction X to form a strip-shaped area where the poles 101 are concentrated, and through holes 113 can also be provided corresponding to the area, so that the projection of the poles 101 along the thickness direction of the box wall 111 at least partially falls within the range of the through holes 113.

[0172] Also optionally, the pole 101 is arranged on a surface of the battery cell 10 parallel to the first direction X and the second direction Y, and the pole 101 is close to the surface and located on one side of the second direction Y. In the second direction Y, the battery cells 10 are arranged in parallel in such a way that the poles 101 are away from each other, and the poles 101 are arranged along the first direction X.

[0173] Specifically, when the battery cell unit includes two battery cells 10, the two batteries are provided with the sides of the poles 101 away from each other. The poles 101 on the battery cells 10 arranged along the first direction X are also arranged along the first direction X to form a strip-shaped area where the two poles 101 are concentrated. A through hole 113 extending along the first direction X can be provided corresponding to at least part of the area, so that the projection of the pole 101 along the thickness direction of the box wall 111 at least partially falls within the range of the through hole 113.

[0174] When the number of battery cells 10 included in the battery cell unit is greater than two, the side of each battery cell 10 provided with the pole 101 faces the same direction, forming a strip-shaped area where the poles 101 are concentrated, and the number of the area is the same as the number of battery cells 10 in the battery cell unit. A through hole 113 extending along the first direction X may be provided corresponding to at least a portion of the area, so that the projection of the pole 101 along the thickness direction of the box wall 111 at least partially falls within the range of the through hole 113.

[0175] Also optionally, the pole 101 is arranged on the surface of the battery cell 10 parallel to the first direction X and the second direction Y, and the pole 101 is arranged in the middle or near the middle of the surface. In the second direction Y, the battery cells 10 are arranged side by side, and the poles 101 on the battery cells 10 are far away from each other. The battery cell unit is arranged along the first direction X, and the poles 101 are arranged along the first direction X, and a strip area where the poles 101 are concentrated is formed, and the number of the areas is the same as 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 part of the area, so that the projection of the pole 101 along the thickness direction of the box wall 111 at least partially falls within the range of the through hole 113.

[0176] Also optionally, the pole 101 is arranged on a side surface of the battery cell 10 in the second direction Y. The battery cell unit includes two battery cells 10, and in the second direction Y, the two battery cells 10 are arranged in parallel in a manner that the poles 101 are away from each other. The battery cell units are arranged along the first direction X, and the poles 101 are arranged along the first direction X. A through hole 113 extending along the first direction X may be provided corresponding to at least part of the area, so that the projection of the pole 101 along the thickness direction of the box wall 111 at least partially falls within the range of the through hole 113.

[0177] The electrical kit 13 can be arranged on any surface of the battery cell group. Optionally, the electrical kit 13 is arranged along the first direction X, and through holes 113 extending along the first direction X are respectively arranged corresponding to the electrical kit 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 kit 13 along the thickness direction of the box wall 111 partially or completely fall within the range of the through hole 113. Further, at least part of the electrical kit 13 is arranged at the pole 101, so that the projection of the electrical kit 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 hole 113 is arranged corresponding to the electrical kit 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 kit 13 along the thickness direction of the box wall 111 partially or completely fall within the range of the through hole 113.

[0178] The busbar 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 busbar 12 along the thickness direction of the box wall 111 partially or completely fall within the range of the through hole 113.

[0179] Since the two battery cells 10 adjacent to each other along the second direction Y are arranged in parallel with the poles 101 being close to each other, the poles 101 are arranged more concentratedly, and therefore, the through holes 113 corresponding to the poles 101 can be opened more concentratedly, and the through holes 113 located at similar positions can be integrated into one through hole 113, thereby saving the process of setting the through holes 113 and the closing cover 112. Since the two battery cells 10 adjacent to each other along the second direction Y are arranged in parallel with the poles 101 being far away from each other, the poles 101 located on the same side of the battery cells 10 in the second direction Y are arranged more concentratedly, and therefore, the through holes 113 can be opened separately, and the through holes 113 corresponding to the poles 101 on the same side can be integrated into one through hole 113, thereby saving the process of setting the through holes 113 and the closing 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.

[0180] In some embodiments, a length dimension 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.

[0181] The battery cell group is placed in the accommodating cavity, and the length dimension of the accommodating box 11 in the second direction Y is greater than the length dimension of the battery cell group in the second direction Y. In actual use, the upper limit of the size of the accommodating box 11 can be determined according to the size of the space reserved for the battery by the electrical device, and then the upper limit of the length dimension of the second direction Y and the upper limit of the length dimension of the first direction X of the battery cell group can be determined. According to the power required by the electrical device, the total volume of the required battery cells 10 in the battery cell group is determined. According to the volume and upper limit of the size of the battery cell group, the lower limit of the length dimension of the second direction Y and the lower limit of the length dimension of the first direction X of the battery cell group are determined. This application does not impose any special restrictions on the size of the battery cell group. When the battery is used in a vehicle, the length dimension of the battery cell group in the second direction Y is in the range of 800mm to 1200mm. For example, the length dimension can be 800mm, 850mm, 900mm, 1000mm, 1100mm, 1200mm.

[0182] 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 the power.

[0183] 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 the range of 350 mm to 700 mm.

[0184] The battery cell unit includes at least two battery cells 10 arranged in parallel along the second direction Y, and 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 dimension of the battery cell 10 in the second direction Y is in the range of 350 mm to 700 mm, which means that the length dimension of the battery cell unit in the second direction Y is not less than 700 mm. For example, the length dimension can be 350 mm, 400 mm, 450 mm, 500 mm, 550 mm, 600 mm, 650 mm, 700 mm. Accordingly, the length dimension of the battery cell unit in the second direction Y is not greater than 1400 mm.

[0185] 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 the amount of electricity.

[0186] In some embodiments, Fig.12 As shown, there are multiple through holes 113 , and one or more closing covers 112 are provided corresponding to each through hole 113 .

[0187] Optionally, there are multiple through holes 113, and multiple through holes 113 are provided corresponding to at least part of the pole 101 and at least part of the electrical kit 13, and each through hole 113 is provided with a corresponding closing cover 112. Also optionally, there are multiple through holes 113, and one closing cover 112 is provided corresponding to at least one through hole 113, and one closing cover 112 can close several through holes 113 at similar positions, or the closing cover 112 can close the through holes 113 located on the same extension line.

[0188] Specifically, two battery cells 10 adjacent to each other along the second direction Y are arranged in parallel in a manner that the poles 101 are close to each other or far away from each other, and the poles 101 are arranged along the first direction X to form a strip 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 part of the region. If the poles 101 are close to each other in the second direction Y, the poles 101 close to each other can be regarded as being located in the same strip region, and continuous or discontinuous through holes 113 extending along the first direction X are provided corresponding to the region. Among them, the continuous through hole 113 extending along the first direction X refers to one through hole 113 extending along the first direction X, and the discontinuous through hole 113 extending along the first direction X refers to a plurality of through holes 113 extending along the first direction X.

[0189] Optionally, corresponding to the battery monomer units, the poles 101 are arranged along the second direction Y, and corresponding to at least some of the battery monomer units, continuous or discontinuous through holes 113 extending along the second direction Y are provided.

[0190] Thus, the through hole 113 can be set at a position outside the pole 101 that needs to be repaired, meeting various repair position requirements of the battery cell 10. The closing cover 112 is set corresponding to the through hole 113, and when not being repaired, it can isolate the battery from the external environment, so that the battery can work in a closed and stable environment.

[0191] In some embodiments, the projection area of ​​the through hole 113 along the thickness direction of the box wall 111 does not exceed 30% of the projection area of ​​the box wall 111 formed with the through hole 113 along the thickness direction of the box wall 111 .

[0192] 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.

[0193] 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 application does not make any special limitation on this.

[0194] 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.

[0195] 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.

[0196] 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, so that at least part of all poles 101 arranged along the first direction X can be exposed, so that each pole 101 arranged along the first direction X can be inspected.

[0197] Likewise, optionally, 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 poles 101 in the battery monomer unit are arranged along the second direction Y, and 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, so that at least part of all poles 101 arranged along the second direction Y can be exposed, so that each pole 101 arranged along the second direction Y can be inspected.

[0198] 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 may 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 may expose at least a portion of each battery cell 10 arranged in the second direction Y.

[0199] In some embodiments, the length of the through hole 113 along the first direction X is not 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.

[0200] Therefore, the maintenance requirement for at least part of the pole 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 .

[0201] 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 dimension can be 50 mm, 80 mm, 100 mm, 150 mm, 160 mm, 200 mm, 220 mm, 250 mm, 300 mm.

[0202] Thus, a relatively suitable 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 opening area of ​​the through hole 113 being too large to affect the structural strength of the box wall 111 .

[0203] In some embodiments, Fig.12 , Fig.14 , Fig.17 , Fig.18 , Fig.21 , Fig. 22 , Fig.23 and Fig.26 As shown, 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 .

[0204] The sealing member 114 is made of an elastic material, such as rubber, and the present application does not impose any special restrictions on this. The sealing member 114 is arranged between the closing cover 112 and the through hole 113, and the sealing member 114 is arranged around the edge of the through hole 113. When the closing cover 112 closes the through hole 113, the sealing member 114 is pressed tightly to reduce the gap between the closing cover 112 and the through hole 113.

[0205] 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 accommodation cavity and damaging the battery cell 10 .

[0206] In some embodiments, Figures 13 to 16 As shown, the closing cover 112 is mounted on the box wall 111 by screws, or the closing cover 112 is slidably snap-fitted to the box wall 111 , or the closing cover 112 is hinged to the box wall 111 .

[0207] Optionally, the closing cover 112 is mounted on the box wall 111 by screws. The closing cover 112 is arranged to cover the through hole 113, and the projection area of ​​the closing cover 112 along the thickness direction of the box wall 111 is larger than the opening area of ​​the through hole 113. A threaded hole is arranged on the box wall 111. When installing, the screw is passed through the threaded holes of the closing cover 112 and the box wall 111, so that the closing cover 112 closes the through hole 113. When disassembling, the screw is unscrewed, and the closing cover 112 is removed from the box wall 111, so that the through hole 113 is connected to the outside.

[0208] Also optionally, the closing cover 112 is slidably engaged with the box wall 111. Slide grooves are respectively arranged on the surface of the box wall 111 on both sides of the through hole 113, and the two sides of the closing cover 112 are structured to be inserted into the slide grooves and slide relative to the slide grooves, so that the closing cover 112 can slide on the through hole 113. Specifically, slide grooves are respectively arranged on the box walls 111 on both sides perpendicular to the extension direction of the through hole 113, and the slide grooves are structured to extend from the edge of the through hole 113 in a direction away from the accommodating cavity and bend in a direction away from each other. The two sides of the closing cover 112 are structured to extend in a direction close to the accommodating cavity and bend in a direction close to each other. This structure is engaged with the slide groove, so that the closing cover 112 can slide in the slide groove. Further, a stopper that can block the sliding of the closing cover 112 is arranged on the box wall 111 on one side of the extension direction of the through hole 113, so that the slide groove slides in or out from the other side.

[0209] Likewise, optionally, the closing cover 112 is hinged to the box wall 111. One side of the closing cover 112 can be hinged to the surface of the box wall 111 located on either side of the through hole 113, and the closing cover 112 can rotate relative to the hinged position to open and close the through hole 113. Further, one side of the closing cover 112 is hinged to the box wall 111, and the other side of the closing cover 112 is detachably fixed to the box wall 111 by a magnet or a screw.

[0210] It is understandable that the closing cover 112 may be constructed in other detachable structures, and the present application does not impose any special limitation on this.

[0211] The closure cover 112 is installed on the box wall 111 by screws, and the screws are fixed firmly, and the disassembly can be achieved by simply turning the screws, which has a simple structure, convenient operation, and saves time and effort. The closure cover 112 can be slidably clamped on the box wall 111, which is convenient to slide and quick to disassemble. The closure cover 112 is hinged to the box wall 111, and the closure cover 112 can be partially disassembled by rotating, which saves effort to open and close, and quick to disassemble.

[0212] In some embodiments, Fig. 22 , Figure 24 to Figure 26As shown, the box wall 111 formed with a 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.

[0213] A boss 1113 is constructed on the box wall 111 formed with a through hole 113. The boss 1113 forms a receiving portion on the side facing the battery cell 10. The receiving portion is connected to the receiving cavity and can be used to receive the electrical kit 13. A through hole 113 is provided on the wall of the boss 1113 facing the battery cell 10. The through hole 113 connects the receiving portion with the outside. The projection of the through hole 113 along the thickness direction of the box wall 111 all falls 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.

[0214] The pole 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 pole 101 may protrude from the outer surface of the battery cell 10. When the pole 101 protrudes from the surface of the battery cell 10, the receiving portion may also be used to receive the pole 101 and / or the busbar.

[0215] Optionally, at least part of the electrical kit 13 is disposed between the pole 101 and the through hole 113, that is, the projection of the electrical kit 13 along the thickness direction of the box wall 111 overlaps at least partly with the projection of the pole 101 along the thickness direction of the box wall 111, so that at least part of the electrical kit 13 is located in the receiving portion. Further, the length of the boss 1113 along the first direction X is greater than or equal to the length of the receiving 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 receiving cavity along the second direction Y, so that the boss 1113 can accommodate more electrical kits 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.

[0216] Since the boss 1113 is formed by the box wall 111 protruding in the direction away from the battery cell 10, the inside of the boss 1113 has a space for accommodating the portion of the battery cell 10 protruding from the surface. Since the through hole 113 is opened on the wall of the boss 1113 facing the battery cell 10, at least a part of the pole 101 is accommodated in the accommodating portion. Since at least a part of the electrical kit 13 is located in the accommodating portion, reducing the space occupied by the electrical kit 13 in the accommodating cavity helps to reduce the volume of the accommodating box 11.

[0217] In some embodiments, Fig.23As shown, the closing cover 112 mounted on the box wall 111 is configured to be convex relative to the box wall 111 , and the closing cover 112 forms a receiving space on the side facing the battery cell 10 , and at least a part of the electrical assembly 13 is located in the receiving space via the through hole 113 .

[0218] The closing cover 112 is detachably disposed on the box wall 111 at the through hole 113. The closing cover 112 protrudes 102 in the direction away from the battery cell 10, and the closing cover 112 forms a receiving space on the side facing the battery cell 10. The receiving space can be connected to the receiving cavity through the through hole 113, and can also be connected to the receiving portion through the through hole 113. At least a portion of at least one of the pole 101, the busbar, and the electrical assembly 13 can be accommodated in the receiving space.

[0219] In actual use, a through hole 113 may be opened on the box wall 111 corresponding to the position of the pole 101 and the busbar, so that the projections of 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. A portion of the pole 101 and the busbar protrudes from the surface of the box wall 111, and the closing cover 112 covers the through hole 113, and the portion of the pole 101 and the busbar protruding from the surface of the box wall 111 is accommodated in the accommodation space of the closing cover 112. The electrical kit 13 may be dispersed or concentratedly arranged on any surface of the battery cell group, and a through hole 113 may be opened on the box wall 111 corresponding to the position of the electrical kit 13, so that the projections of the electrical kit 13 along the thickness direction of the box wall 111 all fall within the range of the through hole 113. A portion of the electrical kit 13 protrudes from the surface of the box wall 111 . The closing cover 112 is disposed on the through hole 113 , and the portion of the electrical kit 13 protruding from the surface of the box wall 111 is accommodated in the accommodating space of the closing cover 112 .

[0220] 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, and a part of the pole 101, the busbar and the electrical kit 13 protrude from the surface of the box wall 111 through 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.

[0221] 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 .

[0222] 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 ellipse, an oblong, a rectangle, etc., as long as it meets the exposed size requirements of the maintenance component. This application does not impose any special limitation on the shape of the through hole 113.

[0223] Thus, at least a portion of the electrical kit 13 is placed in the accommodation space of the closing cover 112, reducing the space of the accommodation cavity occupied by the electrical kit 13, which helps to reduce the volume of the accommodation box 11. In addition, the accommodation space of the closing cover 112 and the accommodation portion of the boss 1113 overlap to form a larger space, which can accommodate more poles 101 and electrical kits 13, further reducing the space of the accommodation cavity occupied by the portion of the battery cell 10 protruding from the surface.

[0224] In some embodiments, Figures 10 to 22 , Figure 24 to Figure 26 As shown, the closing cover 112 is designed to be flat.

[0225] The closing cover 112 is in a flat plate shape. The closing cover 112 fits tightly against the surface of the box wall 111 and completely covers the through hole 113, so that the through hole 113 is sealed. After the closing cover 112 closes the through hole 113, there is a gap between the pole 101 and the closing cover 112, that is, the height of the pole 101 is less than the distance between the surface of the battery cell 10 and the closing cover 112, so that the pole 101 is accommodated in the accommodating cavity. The height of the pole 101 refers to the distance between the end of the pole 101 away from the battery cell 10 and the surface of the battery cell 10 where the pole 101 is provided.

[0226] Therefore, the structure is simple and easy to process.

[0227] In some embodiments, Fig.26 and Fig.26 As shown, the pole 101 and part or all of the electrical assembly 13 are located in the receiving portion.

[0228] The inner wall surface of the box wall 111 can be arranged close to or in contact with the surface of the battery cell 10 to reduce the volume of the accommodating cavity. A boss 1113 is constructed on the box wall 111 corresponding to the pole 101 protruding from the surface of the battery cell 10, so that the projection of the pole 101 along the thickness direction of the box wall 111 falls within the range of the boss 1113. If there is a gap between the inner wall surface of the box wall 111 and the surface of the battery cell 10, part of the pole 101 is located in the accommodating cavity and the other part is located in the accommodating portion; if the inner wall surface of the box wall 111 is in contact with the surface of the battery cell 10, all the poles 101 are located in the accommodating portion.

[0229] Since the busbar is placed on the pole 101 , at least a portion of the busbar is located in the receiving portion.

[0230] The electrical kit 13 can be arranged on any surface of the battery cell group. Corresponding to the arrangement positions of at least part of the electrical kit 13 and the pole 101, a boss 1113 is arranged on the box wall 111, so that at least part of the electrical kit 13 and the pole 101 are accommodated in the boss 1113. Optionally, the electrical kit 13 is arranged on the same surface of the battery cell group and is close to each other. Corresponding to the electrical kits 13 with concentrated positions, a boss 1113 is arranged on the box wall 111, so that at least part of the electrical kit 13 is located in the same accommodation portion. Also optionally, at least part of the electrical kit 13 is arranged between the pole 101 and the box wall 111, so that the projection of the electrical kit 13 along the thickness direction of the box wall 111 falls within the range of the pole 101. Corresponding to the electrical assembly 13 and the pole 101 arranged at the pole 101, a boss 1113 is arranged on the box wall 111, so that at least part of the pole 101 and the electrical assembly 13 are located in the same accommodation portion, thereby reducing the number of bosses 1113 required to be arranged and simplifying the process.

[0231] Thus, the space occupied by at least part of the pole 101 and the electrical kit 13 in the accommodation cavity is reduced, which helps to reduce the volume of the accommodation box 11.

[0232] In some embodiments, Figure 3 and Figures 5 to 8 As shown, a protrusion 102 is provided on the battery cell 10 , and the pole 101 is arranged on the surface of the protrusion 102 facing the through hole 113 , and at least a part of the protrusion 102 is located in the accommodation portion.

[0233] The surface structure of the battery cell 10 is a protrusion 102 protruding toward the box wall 111. The shape of the protrusion 102 can be a cylinder, a cube, etc., and the present application does not make any special restrictions on the specific shape of the protrusion 102. The protrusion 102 can be located on one side of the second direction Y of the battery cell 10, on both sides of the second direction Y of the battery cell 10, in the middle of the battery cell 10, etc., and the present application does not make any special restrictions on the specific position of the protrusion 102.

[0234] The pole 101 is arranged on a side surface of the protrusion 102 away from the battery cell 10. Corresponding to the setting position of the pole 101, a through hole 113 is opened on the box wall 111, so that the projection of the pole 101 along the thickness direction of the box wall 111 at least partially falls within the range of the through hole 113. A plurality of battery cells 10 are arranged along the first direction X and / or the second direction Y to form a battery cell group, and 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. A through hole 113 is opened corresponding to the protrusion 102 located on the same straight line, and at least a portion of the protrusion 102 is received in the accommodating portion, so that the pole 101 is received in the accommodating portion. Optionally, at least a portion of the protrusion 102 is received in the accommodating space of the closing cover 112, so that the pole 101 is received in the accommodating space.

[0235] Optionally, the electrical kit 13 and / or the heat exchange assembly 14 are placed at a position on the surface of the battery cell 10 where the protrusion 102 is not provided. There is a gap between the box wall 111 and the surface of the battery cell 10 provided with the protrusion 102, and the space between the peripheral side of the protrusion 102 and the box wall 111 can be used to place components such as the electrical kit 13 and the heat exchange assembly 14. Also optionally, the electrical kit 13 and the busbar 12 are placed on the pole 101, and a through hole 113 is opened on the box wall 111, so that the projections of the electrical kit 13 and the busbar 12 along the thickness direction of the box wall 111 at least partially fall within the range of the through hole 113, and at least a portion of the electrical kit 13 and the busbar 12 are located in the accommodating portion.

[0236] 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 an object in contact with the heat exchange component 14.

[0237] 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 conducting 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 with a suitable height as needed.

[0238] In some embodiments, Figure 3 , Figures 5 to 8 As shown, the pole 101 includes a positive pole and a negative pole, and the positive pole and the negative pole are arranged on the protrusion 102 at an interval.

[0239] Two poles 101 are provided on a battery cell 10, namely a positive pole connected to the positive pole of the battery cell 10 and a negative pole connected to the negative pole of the battery cell 10. The positive pole and the negative pole are arranged on a protrusion 102 at intervals. A protrusion 102 can be constructed on the surface of the battery cell 10, and the positive pole and the negative pole can be arranged on the same protrusion 102; or relatively independent protrusions 102 can be constructed on the surface of the battery corresponding to the positive pole and the negative pole, respectively.

[0240] 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.

[0241] In some embodiments, Figure 3 , Figure 5 and Figure 6 As shown, 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 connecting line of the positive electrode column and the negative electrode column is parallel to the extension direction of the battery cell 10, or the connecting line of the positive electrode column and the negative electrode column is perpendicular to the extension direction of the battery cell 10.

[0242] 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.

[0243] 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.

[0244] Optionally, on the surface of the battery cell 10 parallel to the first direction X and the second direction Y, the protrusion 102 is arranged on one side of the surface in the second direction Y. A plurality of 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, and a heat exchange component 14 may be arranged in the accommodation cavity on the other side of the surface in the second direction Y, and an electrical kit 13 may be arranged between the protrusion 102 and the box wall 111 or the through hole 113.

[0245] Also optionally, on the surface of the battery cell 10 parallel to the first direction X and the second direction Y, the protrusion 102 is arranged in the middle of the surface. A plurality of battery cells 10 are arranged along the first direction X, and the protrusion 102 extends along the first direction X. The heat exchange assembly 14 may be arranged in the accommodation cavity on both sides of the protrusion 102 in the second direction Y, and the electrical kit 13 may be arranged between the protrusion 102 and the box wall 111 or the through hole 113.

[0246] The positive pole and the negative pole are arranged on the same protrusion 102. By arranging the positive pole and the negative pole in a way that the line connecting the two poles is parallel to the extension direction of the battery cell 10, or arranging the positive pole and the negative pole in a way that the line connecting the two poles is perpendicular to the extension direction of the battery cell 10, the arrangement is more regular and convenient for later maintenance. In addition, the protrusion 102 for arranging the two poles 101 has a larger area, which helps to improve the strength of the position where the poles 101 are arranged in the battery cell 10.

[0247] In some embodiments, Figure 7 and Figure 8 As shown, at least two protrusions 102 are arranged at intervals from each other, the positive electrode column is arranged on one of the protrusions 102, and the negative electrode column is arranged on the other of the protrusions 102.

[0248] Two protrusions 102 are constructed on the surface of the battery cell 10, the positive electrode column is arranged on one protrusion 102, and the negative electrode column is arranged on the other protrusion 102. The two protrusions 102 can be arranged at a distance from each other on one side or in the middle of the surface of the battery cell 10, or the two protrusions 102 can be arranged on both sides of the surface of the battery cell 10 respectively. The present application does not impose any special limitation on the arrangement position of the protrusions 102 on the surface of the battery cell 10.

[0249] Specifically, the two protrusions 102 are arranged in the middle of the surface of the battery cell 10 at intervals, and the two protrusions 102 can be arranged along the first direction X or the second direction Y. A plurality of battery cells 10 are arranged along the first direction X, the protrusions 102 extend along the first direction X, and an electrical kit 13 is arranged 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, a heat exchange component 14 can be arranged in the accommodating cavity on both sides of the protrusion 102 in the second direction Y. If the two protrusions 102 are arranged along the second direction Y, a heat exchange component 14 can be arranged in the accommodating cavity on the side away from each other in the second direction Y of the two protrusions 102, and an electrical kit 13 can be arranged between the two protrusions 102.

[0250] The two protrusions 102 are arranged at a distance from each other on one side of the second direction Y of the surface of the battery, and the two protrusions 102 can be arranged along the first direction X or the second direction Y. A plurality of battery cells 10 are arranged along the first direction X, the protrusions 102 extend along the first direction X, and an electrical kit 13 is arranged between the two protrusions 102 and / or between the protrusions 102 and the box wall 111. The heat exchange component 14 is arranged in the accommodation cavity on the other side of the second direction Y of the surface.

[0251] The two protrusions 102 are arranged at intervals on both sides of the second direction Y of the surface of the battery. The multiple battery cells 10 are arranged along the first direction X, the protrusions 102 extend along the first direction X, the heat exchange component 14 is arranged in the accommodation cavity between the two protrusions 102, and the electrical kit 13 is arranged between the protrusion 102 and the box wall 111.

[0252] Since at least two protrusions 102 are provided, and the positive pole and the negative pole are respectively provided on different protrusions 102, there is a large distance between the positive pole and the negative pole, so that the two poles can be relatively independent and do not interfere with each other, thereby reducing the risk of short circuit between the two poles.

[0253] In a second aspect, the present application also provides an electrical device, including a battery, and the battery serves as a power source for the electrical device.

[0254] Since the electric device includes a battery that is easy to inspect, when the electric device is abnormal, the battery can be quickly inspected by removing the closing cover 112. After the inspection is completed, the closing cover 112 can be put back to restore the original state, which saves time and labor and reduces the maintenance burden of workers.

[0255] In some embodiments, Figures 27 to 31 As shown, the electrical device is a vehicle, which 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 arranged through the floor, a 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.

[0256] The vehicle up-down direction Z refers to the direction perpendicular to the plane on which the vehicle is traveling.

[0257] 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 bottom plate of the vehicle. The through hole 113 passes through the bottom plate formed by the cover body 1112, exposing at least part of the pole 101. The closing cover 112 is detachably mounted on the bottom plate and covers the through hole 113. The box body 1111 is arranged on one side surface of the bottom plate, and the seat 15 is arranged on the other side surface of the bottom plate. Along the up-down direction Z of the vehicle, the projection of the through hole 113 on the bottom plate does not overlap with the projection of the seat 15 on the bottom plate.

[0258] It is understandable 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 arranged close to the box body 1111 , the through hole 113 may be provided on the box body 1111 .

[0259] Since a part of the battery box wall 111 is formed as the floor of the vehicle, it is possible to save space in the vertical direction Z of the vehicle, which helps to improve the energy density of the battery. Since the through hole 113 penetrates the floor to expose the battery cell 10, and the projection of the seat 15 on the battery along the vertical direction Z of the vehicle is outside the range of the through hole 113, the seat 15 does not block the through hole 113, and there is no need to move and disassemble the seat 15 during maintenance. The battery can be directly inspected from the inside of the vehicle, saving time and effort. By detachably mounting the closing cover 112 on the floor and covering the through hole 113, the battery cell 10 is isolated from the interior of the vehicle, which is dustproof and waterproof, and can prevent users from direct contact with the battery cell 10, thereby reducing the risk of electric shock for users.

[0260] In some embodiments, Figures 27 to 31 As shown, 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.

[0261] A portion of the box wall 111 contacts the bottom plate, a through hole 113 is provided in the portion of the box wall 111 in contact with the bottom plate, a hole is provided in the bottom plate corresponding to the through hole 113, and along the up-down direction of the vehicle, the projection of the hole on the bottom plate coincides with the projection of the through hole 113 on the bottom plate. The closing cover 112 is detachably mounted on the box wall 111 or the bottom plate, and covers the through hole 113. A seat 15 is provided on the side of the bottom plate away from the battery, and the projection of the seat 15 on the battery along the up-down direction Z of the vehicle is outside the range of the through hole 113.

[0262] Since the through hole 113 passes through the bottom plate and the box wall 111, and the projection of the seat 15 on the battery along the vertical direction Z of the vehicle is outside the range of the through hole 113, the seat 15 does not block the through hole 113, and the battery can be inspected directly from the inside of the vehicle without moving or disassembling the seat 15 during maintenance, saving time and effort. By detachably mounting the closing cover 112 on the bottom plate and covering the through hole 113, the battery cell 10 is isolated from the inside of the vehicle, avoiding direct contact between the user and the battery cell 10, and reducing the risk of electric shock for the user.

[0263] In some embodiments, see 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 same seat row in the left-right direction Y of the vehicle.

[0264] 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.

[0265] The number of seats 15 can be multiple, at least two seats 15 are arranged at intervals along the left-right direction Y of the vehicle, the seats 15 arranged along the left-right direction Y of the vehicle are regarded as a seat row, and at least one seat row is arranged at intervals along the driving direction 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 same seat row in the left-right direction Y of the vehicle.

[0266] 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 without removing the seat 15 and has little impact on the interior of the vehicle.

[0267] In a third aspect, the present application also provides an energy storage device, comprising a battery as described above, wherein the battery is configured to store electrical energy and provide electrical energy.

[0268] Since the energy storage device includes a battery that is easy to inspect, when the energy storage device operates abnormally, the battery can be quickly inspected by removing the sealing cover 112. After the inspection is completed, the sealing cover 112 can be put back to restore the original state, which saves time and labor and reduces the maintenance burden of workers.

[0269] The above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them; although the present application is described in detail with reference to the above embodiments, a person skilled in the art should understand that the technical solutions described in the above embodiments can still be modified, or some or all of the technical features can be replaced by equivalents; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application, and they should all be included in the scope of the present application. In particular, as long as there is no structural conflict, the various technical features mentioned in the various embodiments can be combined in any way.

Claims

1. A battery, characterized in that: include: at least one battery cell, the battery cell comprising a terminal; A storage box, wherein a storage cavity is provided in the storage box, each of the battery cells is accommodated in the storage cavity, the storage box comprises a box wall and a closing cover, the box wall is provided with a through hole, and the closing cover is detachably mounted on the box wall and covers 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.

2. The battery according to claim 1, characterized in that 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 2, characterized in that The battery further comprises a busbar, which is used to connect poles of two battery cells. Along the thickness direction of the box wall, at least a part of the projection of the busbar falls within the range of the through hole.

4. The battery according to claim 3, characterized in that The battery also 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.

5. The battery according to claim 4, characterized in that In the accommodation cavity, a plurality of the battery cells are arranged along a first direction to form a battery cell group, and the first direction is perpendicular to an extension 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, characterized in that 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 an 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 the poles close to each other or in parallel with the 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, characterized in that 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, characterized in that The battery cell unit includes two battery cells, and the length dimension of the battery cells in each of the battery cell units in the second direction is in a range of 350 mm to 700 mm.

9. The battery according to any one of claims 1 to 8, characterized in that The number of the through holes is multiple, One or more closing covers are arranged corresponding to each of the through holes.

10. The battery according to any one of claims 1 to 8, characterized in that The projection area of ​​the through hole along the thickness direction of the box wall does not exceed 30% of the projection 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 8, characterized in that 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 8, characterized in that A length of the through hole along a first direction is no more than 500 mm, wherein the first direction is perpendicular to an extension direction of the battery cell.

13. The battery according to claim 12, characterized in that 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 8, characterized in that A sealing member is arranged 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 8, characterized in that 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 8, characterized in that The box wall formed with the through hole has a boss, and the boss 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 8, characterized in that 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 part of the electrical kit is located in the receiving space via the through hole.

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

19. The battery according to claim 16, characterized in that The pole and part or all of the electrical kit are located in the accommodation portion.

20. The battery according to claim 19, characterized in that The battery cell is provided with a protrusion, the pole is arranged on a surface of the protrusion facing the through hole, and at least a part of the protrusion is located in the accommodating portion.

21. The battery according to claim 20, characterized in that The poles include a positive pole and a negative pole, and the positive pole and the negative pole are arranged on the protrusion at intervals.

22. The battery according to claim 21, characterized in that 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 extending direction of the battery cell, or the connecting line of the positive electrode column and the negative electrode column is perpendicular to the extending direction of the battery cell.

23. The battery according to claim 21, characterized in that At least two of the protrusions are arranged at intervals 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, characterized in that: The invention comprises the battery according to any one of claims 1 to 23, wherein the battery is used as a power source for the electrical device.

25. The electrical device according to claim 24, characterized in that: The electrical device is a vehicle, the vehicle includes at least one seat, a portion of the battery box wall constitutes a floor of the vehicle, the seat is arranged on the floor, the through hole is arranged through the floor, the closing cover is detachably mounted on the floor and covers the through hole, A projection of the seat on the battery along the up-down direction of the vehicle is located outside the range of the through hole.

26. The electrical device according to claim 24, characterized in that: The electrical device is a vehicle, the vehicle comprises 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, A projection of the seat on the battery along the up-down direction of the vehicle is located outside the range of the through hole.

27. The electrical device according to claim 25 or 26, characterized in that: The vehicle comprises at least one seat row, wherein the seat row comprises 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, characterized in that: A battery comprising the battery according to any one of claims 1 to 23, wherein the battery is configured to store electric energy and to provide electric energy.

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