Battery and electric device

Abstract

The embodiment of the invention provides a battery and a power utilization device, the battery comprises a box body and a battery monomer, the box body comprises a box main body, and a top cover and a bottom cover which are oppositely arranged on two sides of the box main body along a first direction; the battery monomer is arranged in the box body and comprises a pole, a gap is formed between the battery monomer and at least one of the bottom cover and the box main body, and the pole is arranged towards the gap.

Description

Batteries and electrical devices Technical Field

[0001] The present application relates to the field of battery technology, and in particular to a battery and an electrical device. Background Art

[0002] With the promotion of the concept of energy conservation and emission reduction, more and more fields use electricity as driving energy. Therefore, the demand for batteries in various fields is also increasing. The development of battery technology is becoming more and more important to the development of other fields.

[0003] In most existing batteries, a certain amount of reserved space is required between the battery casing and the battery cells contained therein to ensure electrical safety. However, the provision of this reserved space results in poor space utilization within the casing, thereby making the battery structure less compact.

[0004] Summary of the Invention

[0005] In view of the above problems, the present application provides a battery and an electrical device, which have high internal space utilization and a relatively compact structure.

[0006] An embodiment of the first aspect of the present application provides a battery, which includes a box body and a battery cell, the box body including a box body and a top cover and a bottom cover arranged opposite to each other on both sides of the box body along a first direction; the battery cell is arranged in the box body, and the battery cell includes a pole, wherein there is a gap between the battery cell and at least one of the bottom cover and the box body, and the pole is arranged toward the gap.

[0007] In the technical solutions of some embodiments of the present application, a battery includes a housing and battery cells. The housing includes a housing body and a top cover and a bottom cover disposed oppositely on either side of the housing body along a first direction. The housing is capable of accommodating the battery cells. The battery cells are disposed within the housing, and a gap exists between the battery cells and at least one of the bottom cover and the housing body. When the battery is subjected to an external force collision, the gap between the battery cells, the bottom cover, and the housing body acts as a buffer, making it less likely for the battery cells to collide with the housing, thereby improving the safety of the battery. The battery cells have poles, which are used to input or output current. Arranging the poles toward the gap allows the gap within the battery used for collision buffering to also serve as the reserved space between the poles and the housing body required to meet electrical safety requirements. This improves space utilization within the battery and makes the battery structure more compact.

[0008] According to an embodiment of the first aspect of the present application, the gap includes a first gap between the battery cell and the bottom cover, the pole faces the first gap, and the battery cell further includes a bottom portion disposed opposite the pole in a first direction, the bottom portion being connected to the top cover. By providing the first gap between the battery cell and the bottom cover, when the battery is impacted by an external force, the first gap can buffer the collision between the battery cell and the bottom cover, thereby improving the safety performance of the battery. By connecting the bottom of the battery cell to the top cover and directing the pole toward the first gap, the first gap within the battery, which is used to buffer the collision between the battery cell and the bottom cover, can also serve as the reserved space between the pole and the housing required to meet electrical safety requirements, thereby improving the space utilization within the battery and making the battery structure more compact.

[0009] According to any of the aforementioned embodiments of the first aspect of the present application, the top cover thickness T1 of the top cover and the bottom cover thickness T2 of the bottom cover satisfy the following relationship: 0.3mm≤T1+T2≤16.5mm. By properly setting the relationship between the top cover thickness T1 and the bottom cover thickness T2, the top cover and the bottom cover can be ensured to have sufficient structural strength while not having excessive thickness.

[0010] According to any of the aforementioned embodiments of the first aspect of the present application, the battery cell further includes a side wall connected between the pole and the bottom, wherein the multiple battery cells are arranged side by side along the second direction and / or the third direction, the side walls of two adjacent battery cells are connected, and the first direction, the second direction, and the third direction intersect with each other. By arranging the multiple battery cells side by side along the second direction and / or the third direction, the poles of the multiple battery cells are all oriented toward the first gap, thereby further improving the space utilization within the battery, making the battery structure more compact, and the side-by-side arrangement of the multiple battery cells also improves the structural strength of the battery.

[0011] According to any of the aforementioned embodiments of the first aspect of the present application, the number n of battery cells, the weight G of each battery cell, the top cover thickness T1 of the top cover, and the bottom cover thickness T2 of the bottom cover satisfy the following relationship: 0.1 ≤ (T1 + T2) / n * G ≤ 16.5. By properly setting the relationship between the number n of battery cells, the weight G of each battery cell, and the top cover thickness T1 and the bottom cover thickness T2, the top cover and the bottom cover can be ensured to have sufficient structural strength to support the battery cells while preventing them from having excessive thickness.

[0012] According to any of the aforementioned embodiments of the first aspect of the present application, the gap includes a second gap between the battery cell and the box body, and the pole is arranged toward the second gap. By providing the second gap between the battery cell and the box body, when the battery is subjected to an external force collision, the second gap can buffer the collision between the battery cell and the box body, thereby improving the safety performance of the battery. By aligning the pole of the battery cell toward the second gap, the second gap within the battery that is used to buffer the collision between the battery cell and the body can also serve as the reserved space between the pole and the box body required to meet electrical safety requirements, thereby improving the space utilization within the battery and making the battery structure more compact.

[0013] According to any of the aforementioned embodiments of the first aspect of the present application, the housing further comprises a bottom plate disposed between the top cover and the bottom cover, the battery cell further comprises a bottom portion disposed opposite the terminal in the second direction, and a side wall connected between the terminal and the bottom portion, the side wall being connected to the bottom plate, the bottom plate and the bottom cover being spaced apart, and the first direction intersecting the second direction. By disposing the bottom plate between the top cover and the bottom cover to support the battery cell, and by distributing the spacing between the bottom plate and the bottom cover, the space between the bottom plate and the bottom cover can buffer collisions between the battery cell and the bottom cover, thereby improving the safety performance of the battery.

[0014] According to any of the aforementioned embodiments of the first aspect of the present application, the top cover thickness T1 of the top cover and the bottom plate thickness T3 of the bottom plate satisfy the following relationship: 0.3mm≤T1+T3≤16.5mm. By properly setting the relationship between the top cover thickness T1 and the bottom plate thickness T3, the top cover and the bottom plate can be ensured to have sufficient structural strength while preventing them from having excessive thickness.

[0015] According to any of the aforementioned embodiments of the first aspect of the present application, multiple battery cells are arranged side by side along the first direction and / or the third direction, the side walls of two adjacent battery cells are connected, and the first direction, the second direction, and the third direction intersect with each other. By arranging the multiple battery cells side by side along the first direction and / or the third direction, the poles of the multiple battery cells are all oriented toward the second gap, thereby further improving the space utilization within the battery, making the battery structure more compact, and the side-by-side arrangement of the multiple battery cells also improves the structural strength of the battery.

[0016] According to any of the aforementioned embodiments of the first aspect of the present application, the number n of battery cells, the weight G of a single battery cell, the top cover thickness T1 of the top cover, and the bottom plate thickness T3 of the bottom plate satisfy the following relationship: 0.1 ≤ (T1 + T3) / n * G ≤ 16.5. By properly setting the relationship between the number n of battery cells, the weight G of a single battery cell, the top cover thickness T1, and the bottom plate thickness T3, the top cover and bottom plate can be ensured to have sufficient structural strength to support the battery cells while preventing them from having excessive thickness.

[0017] According to any of the aforementioned embodiments of the first aspect of the present application, a buffer member is filled between the top cover and the bottom cover, and the buffer member is used to provide cushioning when the battery is hit. By providing a buffer member that can provide cushioning between the top cover and the bottom cover, the battery's collision resistance is improved.

[0018] According to any of the aforementioned embodiments of the first aspect of the present application, the number n of battery cells is less than or equal to 10. By setting a more reasonable number of battery cells, the box does not need to bear excessive weight of the battery cells, and the volume required for the box does not need to be too large, thereby improving the structural utilization of the battery.

[0019] An embodiment of the second aspect of the present application provides an electrical device, which includes a battery in any of the above embodiments, and the battery is used to provide electrical energy. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following is a brief introduction to the drawings required for use in the embodiments of the present application. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on the drawings without creative work.

[0021] FIG1 is a schematic structural diagram of a vehicle according to some embodiments of the present application;

[0022] FIG2 is a schematic structural diagram of a battery according to some embodiments of the present application;

[0023] FIG3 is a schematic cross-sectional view of a terminal facing the gap between a battery cell and a bottom cover in some embodiments of the present application;

[0024] FIG4 is a cross-sectional schematic diagram of battery cells arranged side by side along a second direction according to some embodiments of the present application;

[0025] FIG5 is a cross-sectional schematic diagram of battery cells arranged side by side along a third direction according to some embodiments of the present application;

[0026] FIG6 is a schematic cross-sectional view of a terminal facing the gap between a battery cell and a box body in some embodiments of the present application;

[0027] FIG7 is a schematic cross-sectional view of a terminal facing the gap between a battery cell and a box body in some other embodiments of the present application;

[0028] FIG8 is a cross-sectional schematic diagram of battery cells arranged side by side along a first direction according to some embodiments of the present application;

[0029] FIG9 is a schematic cross-sectional view of battery cells arranged side by side along a third direction in some other embodiments of the present application.

[0030] In the drawings, the drawings are not drawn to scale.

[0031] Marking Description:

[0032] Vehicles 1000;

[0033] Battery 100; Controller 200; Motor 300;

[0034] Battery cell 1; terminal 11; bottom 12; side wall 13; large side wall 13a; small side wall 13b;

[0035] Box body 2; box body 21; top cover 22; bottom cover 23; bottom plate 24;

[0036] Gap 3; first gap 31; second gap 32;

[0037] First direction X;

[0038] Second direction Y;

[0039] The third direction Z. DETAILED DESCRIPTION

[0040] The following detailed description of the embodiments of the present application is provided in conjunction with the accompanying drawings and examples. The following detailed description of the embodiments and the accompanying drawings are used to illustrate the principles of the present application, but are not intended to limit the scope of the present application, that is, the present application is not limited to the described embodiments.

[0041] In the description of this application, it should be noted that, unless otherwise specified, "multiple" means more than two; the terms "upper", "lower", "left", "right", "inside", "outside", etc., indicating directions or positional relationships, are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation on this application. In addition, the terms "first", "second", "third", etc. are only used for descriptive purposes and cannot be understood as indicating or implying relative importance. "Vertical" is not strictly perpendicular, but is within the allowable error range. "Parallel" is not strictly parallel, but is within the allowable error range.

[0042] The directional words appearing in the following description are all directions shown in the figures, and do not limit the specific structure of this application. In the description of this application, it should also be noted that, unless otherwise clearly specified and limited, the terms "install", "connect", and "connect" 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 directly connected or indirectly connected through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to the specific circumstances.

[0043] Currently, market developments indicate that power batteries are becoming increasingly widely used. They are not only used in energy storage systems such as hydropower, thermal, wind, and solar power plants, but are also widely used in electric vehicles like electric bicycles, electric motorcycles, and electric vehicles, as well as in military equipment and aerospace. As power battery applications continue to expand, market demand is also growing.

[0044] The applicant has noted that with the development of battery technology, people increasingly desire more compact battery structures. In most existing batteries, a certain amount of reserved space is often required between the battery cell terminals and the housing to ensure electrical safety. Because the battery cell terminals often face the top cover of the housing, this reserved space is often located between the battery cell and the housing. Furthermore, gaps are required between the battery cell and the housing in multiple directions to cushion collisions. Therefore, the separate provision of the cushioning gap and the reserved space results in poor space utilization within the housing, which in turn makes the battery structure less compact.

[0045] In order to improve the utilization rate of the internal space of the battery and make the battery have a more compact structure, the applicant has found that the gap in the battery used to buffer collisions can be set as the reserved space between the pole and the box body required to meet electrical safety.

[0046] For example, the box body includes a box body and a bottom cover. The gap between the battery cell and the box body or the battery cell and the bottom cover is set as the reserved space between the pole and the box body required to meet electrical safety, and the pole is set towards the gap.

[0047] In such a battery, when the battery is subjected to an external impact, the gap between the battery cell and the box body, or between the battery cell and the bottom cover, can buffer the impact. Orienting the terminal toward the gap between the battery cell and the box body, or between the battery cell and the bottom cover, allows the gap within the battery used for buffering impact to also serve as the reserved space between the terminal and the box body required for electrical safety, thereby improving space utilization within the battery and making the battery structure more compact.

[0048] The battery mentioned in the embodiments of the present application refers to a single physical module that includes one or more battery cells to provide higher voltage and capacity. For example, the battery mentioned in the present application may include a battery module or a battery pack, etc. The battery generally includes a box for encapsulating one or more battery cells, which can to a certain extent prevent liquids or other foreign matter from affecting the charging or discharging of the battery cells. This type of battery is suitable for various electrical devices that use batteries, such as mobile phones, portable devices, laptops, electric vehicles, electric toys, electric tools, electric vehicles, ships and spacecraft, etc. For example, spacecraft include airplanes, rockets, space shuttles and spacecraft, etc.; the battery is used to provide electrical energy for the above-mentioned electrical devices.

[0049] The electrical devices provided in some embodiments of the present application may be vehicles, mobile phones, portable devices, laptop computers, ships, spacecraft, electric toys, and electric tools, etc. Vehicles may be fuel vehicles, gas vehicles, or new energy vehicles, and new energy vehicles may be pure electric vehicles, hybrid vehicles, or extended-range vehicles, etc. Spacecraft include aircraft, rockets, space shuttles, and spacecraft, etc. Electric toys include fixed or mobile electric toys, such as game consoles, electric car toys, electric ship toys, and electric airplane toys, etc. Electric tools include metal cutting power tools, grinding power tools, assembly power tools, and railway power tools, such as electric drills, electric grinders, electric wrenches, electric screwdrivers, electric hammers, impact drills, concrete vibrators, and electric planers, etc.

[0050] It should be understood that the technical solutions described in some embodiments of the present application are not limited to the batteries and electrical equipment described above, but can also be applied to all batteries including boxes and electrical equipment using batteries. However, for the sake of simplicity, the following embodiments are explained using electric vehicles as an example.

[0051] Please refer to Figure 1, which is a schematic structural diagram of a vehicle 1000 provided in some embodiments of the present application. The vehicle 1000 can be a fuel vehicle, a gas vehicle or a new energy vehicle. The new energy vehicle can be a pure electric vehicle, a hybrid vehicle or an extended-range vehicle, etc. A battery 100 is provided inside the vehicle 1000, and the battery 100 can be provided at the bottom, head or tail of the vehicle 1000. The battery 100 can be used to power the vehicle 1000. For example, the battery 100 can serve as an operating power source for the vehicle 1000. The vehicle 1000 may also include a controller 200 and a motor 300. The controller 200 is used to control the battery 100 to power the motor 300, for example, for starting, navigating and driving the vehicle 1000.

[0052] In some embodiments of the present application, the battery 100 can serve not only as an operating power source for the vehicle 1000, but also as a driving power source for the vehicle 1000, replacing or partially replacing fuel or natural gas to provide driving power for the vehicle 1000.

[0053] Figure 2 is a structural schematic diagram of the battery 100 in some embodiments of the present application, and Figure 3 is a cross-sectional schematic diagram of the electrode 11 facing the gap 3 between the battery cell 1 and the bottom cover 23 in some embodiments of the present application. The X direction in the figure is the first direction X, the Y direction in the figure is the second direction Y, and the Z direction in the figure is the third direction Z. The first direction X, the second direction Y and the third direction Z intersect with each other.

[0054] As shown in Figures 2 and 3, the present application provides a battery 100, which includes a case 2 and a battery cell 1. The case 2 includes a case body 21 and a top cover 22 and a bottom cover 23 arranged opposite to each other on both sides of the case body 21 along a first direction X; the battery cell 1 is arranged in the case 2, and the battery cell 1 includes a pole 11, wherein a gap 3 exists between the battery cell 1 and at least one of the bottom cover 23 and the case body 21, and the pole 11 is arranged toward the gap 3.

[0055] In some embodiments, the box body 21, the top cover 22, and the bottom cover 23 can jointly define a storage space for accommodating the battery cells 1. The box body 2 can, to a certain extent, prevent liquids or other foreign matter from affecting the charging or discharging of the battery cells 1. For example, the box body 21 can be integrally formed with the bottom cover 23 to form a hollow structure with one end open, and the top cover 22 can be a plate-like structure. The top cover 22 covers the open side of the hollow structure formed by the box body 21 and the bottom cover 23, so that the box body 21, the top cover 22, and the bottom cover 23 can jointly define a storage space. For another example, the top cover 22 can be integrally formed with a portion of the box body 21 to form a hollow structure with one end open, and the bottom cover 23 can be integrally formed with another portion of the box body 21 to form a hollow structure with one end open. The open side of the hollow structure formed by the top cover 22 and a portion of the box body 21 covers the open side of the hollow structure formed by the bottom cover 23 and another portion of the box body 21, so that the box body 21, the top cover 22, and the bottom cover 23 can jointly define a storage space. In addition, the box body 2 can have various shapes. For example, the box body 2 can be cylindrical or rectangular.

[0056] In some embodiments, there may be multiple battery cells 1 in the battery 100, and the multiple battery cells 1 may be connected in series, in parallel, or in a hybrid connection. Hybrid connection refers to multiple battery cells 1 being connected both in series and in parallel. Multiple battery cells 1 may be directly connected in series, in parallel, or in a hybrid connection, and then the entirety formed by the multiple battery cells 1 may be housed in the housing 2. Of course, the battery 100 may also be a battery module 100 formed by first connecting multiple battery cells 1 in series, in parallel, or in a hybrid connection, and then the multiple battery modules 100 may be connected in series, in parallel, or in a hybrid connection to form an entirety, and then housed in the housing 2. The battery 100 may also include other structures. For example, the battery 100 may also include a busbar (not shown in the figure) that is used to achieve electrical connection between the multiple battery cells 1.

[0057] In some embodiments, the battery cell 1 can be of various types, for example, a lithium-ion secondary battery cell 1, a lithium-ion primary battery cell 1, a lithium-sulfur battery cell 1, a sodium-lithium-ion battery cell 1, a sodium-ion battery cell 1, or a magnesium-ion battery cell 1. The battery cell 1 can have various shapes, for example, a cylindrical, flat, rectangular, or other shapes.

[0058] In some embodiments, the terminal 11 is used to output or input electrical energy to the battery cell 1. For example, the terminal 11 can be used to electrically connect to an electrode assembly (not shown) of the battery cell 1 to output or input electrical energy to the battery cell 1.

[0059] In some embodiments, a gap 3 may exist between the battery cell 1 and the bottom cover 23 to cushion the impact between the battery cell 1 and the bottom cover 23, or a gap 3 may exist between the battery cell 1 and the box body 21 to cushion the impact between the battery cell 1 and the box body 21. In other embodiments, a gap 3 may exist between the battery cell 1 and both the bottom cover 23 and the box body 21 to cushion the impact. The terminal post 11 may face the gap 3 between the battery cell 1 and the bottom cover 23, and / or the gap 3 between the battery cell 1 and the box body 21.

[0060] In some embodiments of the present application, a battery 100 includes a housing 2 and a battery cell 1. The housing 2 includes a main body 21 and a top cover 22 and a bottom cover 23 disposed opposite each other along a first direction X. The housing 2 is configured to accommodate the battery cell 1. The battery cell 1 is disposed within the housing 2, with a gap 3 between the battery cell 1 and at least one of the bottom cover 23 and the main body 21. When the battery 100 is impacted by an external force, the gap 3 between the battery cell 1, the bottom cover 23, and the main body 21 acts as a buffer, preventing collisions between the battery cell 1 and the housing 2, thereby improving the safety of the battery 100. The battery cell 1 has a terminal 11, which is used to input or output current. Positioning the terminal 11 toward the gap 3 allows the gap 3 within the battery 100, which serves as a buffer for collisions, to also serve as the reserved space between the terminal 11 and the housing 2 required for electrical safety. This improves space utilization within the battery 100 and results in a more compact structure.

[0061] Referring to Figure 3, in some embodiments, the gap 3 includes a first gap 31 between the battery cell 1 and the bottom cover 23, the pole 11 faces the first gap 31, and the battery cell 1 also includes a bottom 12 arranged opposite to the pole 11 in the first direction X, and the bottom 12 is connected to the top cover 22.

[0062] The size of the first gap 31 can be set based on the specific structure of the battery cell 1 and the specific structure of the housing 2, so that the first gap 31 can buffer the collision between the battery cell 1 and the bottom cover 23, and make the structure of the battery 100 more compact. In some embodiments, the first gap 31 between the battery cell 1 and the bottom cover 23 can refer to the gap 3 between the terminal 11 of the battery cell 1 and the bottom cover 23. In some embodiments, the first gap 31 can be greater than or equal to 7 mm.

[0063] The bottom 12 of the battery cell 1 and the top cover 22 can be connected in various ways. In some embodiments, the bottom 12 of the battery cell 1 and the top cover 22 can be connected by adhesive or welding. In other embodiments, the bottom 12 of the battery cell 1 and the top cover 22 can be connected by bolts.

[0064] By providing a first gap 31 between the battery cell 1 and the bottom cover 23, when the battery 100 is subjected to an external force, the first gap 31 can cushion the impact between the battery cell 1 and the bottom cover 23, thereby improving the safety performance of the battery 100. By connecting the bottom 12 of the battery cell 1 to the top cover 22 and orienting the terminal 11 toward the first gap 31, the first gap 31 within the battery 100, which is used to cushion the impact between the battery cell 1 and the bottom cover 23, can also serve as the reserved space between the terminal 11 and the housing 2 required to meet electrical safety requirements. This improves the space utilization within the battery 100 and makes the battery 100 more compact.

[0065] In some embodiments, the top cover thickness T1 of the top cover 22 and the bottom cover thickness T2 of the bottom cover 23 satisfy the following relationship: 0.3mm≤T1+T2≤16.5mm. When the sum of the top cover thickness T1 and the bottom cover thickness T2 is less than 0.3mm, the structural strength of the case 2 is weak, and the case 2 is prone to deformation or even rupture. When the sum of the top cover thickness T1 and the bottom cover thickness T2 is greater than 16.5mm, the excessive thickness of the top cover 22 and the bottom cover 23 may cause the battery 100 to be larger and heavier, and may easily cause the battery 100 to be overdesigned.

[0066] The top cover thickness T1 may refer to the thickness at any location on the top cover 22, or the average thickness of multiple locations on the top cover 22. In some embodiments, the top cover thickness T1 may refer to the minimum thickness of the top cover 22. In other embodiments, the top cover thickness T1 may refer to the average thickness of the entire top cover 22.

[0067] The bottom cover thickness T2 may refer to the thickness at any location on the bottom cover 23, or may refer to the average thickness of multiple locations on the bottom cover 23. In some embodiments, the bottom cover thickness T2 may refer to the minimum thickness of the bottom cover 23. In other embodiments, the bottom cover thickness T2 may refer to the average thickness of the entire bottom cover 23.

[0068] In some embodiments, the thickness T1 of the top cover may be greater than the thickness T2 of the bottom cover, so that the top cover 22 connected to the bottom 12 of the battery cell 1 has better structural strength.

[0069] By reasonably setting the relationship between the thickness T1 of the top cover and the thickness T2 of the bottom cover, the top cover 22 and the bottom cover 23 can meet the structural strength requirements while not having excessive thickness.

[0070] FIG4 is a schematic cross-sectional view of battery cells 1 arranged side by side along a second direction Y in some embodiments of the present application. FIG5 is a schematic cross-sectional view of battery cells 1 arranged side by side along a third direction Z in some embodiments of the present application.

[0071] As shown in Figures 4 and 5, in some embodiments, the battery cell 1 further includes a side wall 13 connected between the pole 11 and the bottom 12, wherein a plurality of battery cells 1 are arranged side by side along the second direction Y and / or the third direction Z, the side walls 13 of two adjacent battery cells 1 are connected, and the first direction X, the second direction Y and the third direction Z intersect each other.

[0072] By arranging multiple battery cells 1 side by side along the second direction Y and / or the third direction Z, the poles 11 of the multiple battery cells 1 are all facing the first gap 31, thereby further improving the space utilization within the battery 100, making the structure of the battery 100 more compact, and the side-by-side arrangement of the multiple battery cells 1 also improves the structural strength of the battery 100.

[0073] In some embodiments, the number n of battery cells 1, the weight G of a single battery cell 1, the top cover thickness T1 of the top cover 22, and the bottom cover thickness T2 of the bottom cover 23 satisfy the following relationship: 0.1 ≤ (T1 + T2) / n * G ≤ 16.5. When the ratio of the sum of the top cover thickness T1 and the bottom cover thickness T2 to the total weight of all battery cells 1 is less than 0.1, the structural strength of the housing 2 is weak, and the housing 2 is susceptible to deformation or even rupture due to the weight of the battery cells 1. When the ratio of the sum of the top cover thickness T1 and the bottom cover thickness T2 to the total weight of all battery cells 1 is greater than 16.5, excessively thick top and bottom covers 22 and 23 can easily increase the volume and weight of the battery 100, making the battery 100 overdesigned.

[0074] The unit of the weight G of the battery cell 1 is kg, and the units of the top cover thickness T1 and the bottom cover thickness T2 are mm. The definitions of the top cover thickness T1 and the bottom cover thickness T2 may be the same as those in the above embodiment.

[0075] By reasonably setting the relationship between the number n of battery cells 1, the weight G of a single battery cell 1, and the thickness T1 of the top cover and the thickness T2 of the bottom cover, the top cover 22 and the bottom cover 23 can meet the structural strength requirements for supporting the battery cells 1 while not having excessive thickness.

[0076] 6 is a schematic cross-sectional view of the pole 11 facing the gap 3 between the battery cell 1 and the box body 21 in some embodiments of the present application, and FIG. 7 is a schematic cross-sectional view of the pole 11 facing the gap 3 between the battery cell 1 and the box body 21 in other embodiments of the present application.

[0077] As shown in FIG. 6 and FIG. 7 , in some embodiments, the gap 3 includes a second gap 32 between the battery cell 1 and the box body 21 , and the pole 11 is disposed toward the second gap 32 .

[0078] The size of the second gap 32 can be set based on the specific structure of the battery cell 1 and the specific structure of the box body 2, so that the second gap 32 can buffer the collision between the battery cell 1 and the box body 21, and make the structure of the battery 100 more compact. In some embodiments, the second gap 32 between the battery cell 1 and the box body 21 can refer to the gap 3 between the terminal 11 of the battery cell 1 and the box body 21. In some embodiments, the second gap 32 can be greater than or equal to 4 mm.

[0079] In some embodiments, a second gap 32 exists between the battery cell 1 and the box body 21 on both sides in the second direction Y and / or the third direction Z, making it difficult for the battery cell 1 and the box body 21 to collide with each other in multiple directions. In some embodiments, the terminal 11 of the battery cell 1 can be positioned toward at least one of the second gaps 32.

[0080] In some embodiments, when the pole 11 of the battery cell 1 is set toward the second gap 32, the side wall 13 of the battery cell 1 can be connected to the top cover 22, thereby limiting the movement of the battery cell 1 in the box body 2 and improving the space utilization in the battery 100, making the structure of the battery 100 more compact.

[0081] By providing a second gap 32 between the battery cell 1 and the box body 21, when the battery 100 is subjected to an external force, the second gap 32 can cushion the impact between the battery cell 1 and the box body 21, thereby improving the safety performance of the battery 100. By orienting the terminal 11 of the battery cell 1 toward the second gap 32, the second gap 32 within the battery 100, which is used to cushion the impact between the battery cell 1 and the body, can also serve as the reserved space between the terminal 11 and the box body 2 required to meet electrical safety requirements. This improves the space utilization within the battery 100 and makes the battery 100 more compact.

[0082] 6 and 7 , in some embodiments, the housing 2 further includes a bottom plate 24 disposed between the top cover 22 and the bottom cover 23 , and the battery cell 1 further includes a bottom 12 disposed opposite the pole 11 in the second direction Y and a side wall 13 connected between the pole 11 and the bottom 12 , the side wall 13 being connected to the bottom plate 24 , the bottom plate 24 being spaced apart from the bottom cover 23 , and the first direction X intersects with the second direction Y.

[0083] In some embodiments, the bottom plate 24 may be disposed parallel to the bottom cover 23 or the top cover 22 , and both ends of the bottom plate 24 in the second direction Y and / or the third direction Z may be connected to the box body 21 .

[0084] In some embodiments, the distance between the bottom plate 24 and the bottom cover 23 may be slightly smaller than or equal to the size of the first gap 31 .

[0085] The side walls 13 of the battery cell 1 can be connected to the bottom plate 24 in a variety of ways. In some embodiments, the side walls 13 of the battery cell 1 can be connected to the bottom plate 24 using adhesive or welding. In other embodiments, the side walls 13 of the battery cell 1 can be connected to the bottom plate 24 using bolts.

[0086] In some embodiments, the sidewall 13 of the battery cell 1 may include a large sidewall 13a and a small sidewall 13b, with the surface area of ​​the large sidewall 13a being greater than the surface area of ​​the small sidewall 13b. The connection location between the sidewall 13 of the battery cell 1 and the bottom plate 24 can be appropriately selected based on the structure and size of the housing 2 and the battery cell 1. In some embodiments, the large sidewall 13a of the battery cell 1 may be connected to the bottom plate 24. In other embodiments, the small sidewall 13b of the battery cell 1 may be connected to the bottom plate 24.

[0087] By arranging a bottom plate 24 between the top cover 22 and the bottom cover 23 to support the battery cell 1, the bottom plate 24 and the bottom cover 23 are spaced apart so that the space between the bottom plate 24 and the bottom cover 23 can buffer the collision between the battery cell 1 and the bottom cover 23, thereby improving the safety performance of the battery 100.

[0088] In some embodiments, the top cover thickness T1 of the top cover 22 and the bottom plate thickness T3 of the bottom plate 24 satisfy the following relationship: 0.3mm≤T1+T3≤16.5mm. When the sum of the top cover thickness T1 and the bottom plate thickness T3 is less than 0.3mm, the structural strength of the case 2 is weak, and the case 2 is prone to deformation or even rupture. When the sum of the top cover thickness T1 and the bottom plate thickness T3 is greater than 16.5mm, the excessive thickness of the top cover 22 and the bottom plate 24 may cause the battery 100 to be larger and heavier, and may easily cause the battery 100 to be overdesigned.

[0089] The definition of the top cover thickness T1 may be the same as that of the top cover thickness T1 in the aforementioned embodiment.

[0090] The bottom plate thickness T3 may refer to the thickness at any location on the bottom plate 24, or may refer to the average thickness of multiple locations on the bottom plate 24. In some embodiments, the bottom plate thickness T3 may refer to the minimum thickness of the bottom plate 24. In other embodiments, the bottom plate thickness T3 may refer to the average thickness of the entire bottom plate 24.

[0091] In some embodiments, the bottom plate thickness T3 may be greater than the top cover thickness T1 , so that the bottom plate 24 for supporting the battery cell 1 has better structural strength.

[0092] By reasonably setting the relationship between the top cover thickness T1 and the bottom plate thickness T3, the top cover 22 and the bottom plate 24 can meet the structural strength requirements while the top cover 22 and the bottom cover 23 are unlikely to have excess thickness.

[0093] FIG8 is a schematic cross-sectional view of battery cells 1 arranged side by side along a first direction X in some embodiments of the present application, and FIG9 is a schematic cross-sectional view of battery cells 1 arranged side by side along a third direction Z in other embodiments of the present application.

[0094] As shown in Figures 8 and 9, in some embodiments, multiple battery cells 1 are arranged side by side along the first direction X and / or the third direction Z, the side walls 13 of two adjacent battery cells 1 are connected, and the first direction X, the second direction Y and the third direction Z intersect each other.

[0095] In some embodiments, the large side walls 13 a and / or small side walls 13 b of two adjacent battery cells 1 may be connected according to the structure and size of the box body 2 and the battery cells 1 .

[0096] In some embodiments, when multiple battery cells 1 are arranged side by side along the first direction X, the large side wall 13a of the battery cell 1 close to the bottom plate 24 can be connected to the bottom plate 24, and the large side walls 13a of two adjacent battery cells 1 are connected, so that there is a larger force-bearing area between the battery cell 1 and the bottom plate 24, thereby improving the structural stability inside the battery 100.

[0097] In some embodiments, when multiple battery cells 1 are arranged side by side along the third direction Z, the small side wall 13b of the battery cell 1 can be connected to the bottom plate 24, and the large side walls 13a of two adjacent battery cells 1 are connected, so that there is a larger contact area between the two adjacent battery cells 1, thereby improving the structural stability inside the battery 100.

[0098] By arranging multiple battery cells 1 side by side along the first direction X and / or the third direction Z, the poles 11 of the multiple battery cells 1 are all facing the second gap 32, thereby further improving the space utilization within the battery 100, making the structure of the battery 100 more compact, and the side-by-side arrangement of the multiple battery cells 1 also improves the structural strength of the battery 100.

[0099] In some embodiments, the number n of battery cells 1, the weight G of a single battery cell 1, the top cover thickness T1 of the top cover 22, and the bottom plate thickness T3 of the bottom plate 24 satisfy the following relationship: 0.1 ≤ (T1 + T3) / n * G ≤ 16.5. When the ratio of the sum of the top cover thickness T1 and the bottom plate thickness T3 to the total weight of all battery cells 1 is less than 0.1, the structural strength of the housing 2 is weak, and the housing 2 is susceptible to deformation or even rupture due to the weight of the battery cells 1. When the ratio of the sum of the top cover thickness T1 and the bottom plate thickness T3 to the total weight of all battery cells 1 is greater than 16.5, excessively thick top cover 22 and bottom plate 24 can easily increase the volume and weight of the battery 100, resulting in an overdesigned battery 100.

[0100] The unit of the weight G of the battery cell 1 is kg, and the units of the top cover thickness T1 and the bottom plate thickness T3 are mm. The definitions of the top cover thickness T1 and the bottom plate thickness T3 may be the same as those in the above embodiment.

[0101] By reasonably setting the relationship between the number n of battery cells 1, the weight G of a single battery cell 1, the top cover thickness T1, and the bottom plate thickness T3, the top cover 22 and the bottom plate 24 can meet the structural strength requirements for supporting the battery cells 1 while not having excess thickness.

[0102] In some embodiments, a buffer member (not shown) is filled between the top cover 22 and the bottom cover 23 , and the buffer member is used to provide cushioning when the battery 100 is hit.

[0103] The buffer component may be a foam material. In some embodiments, the buffer component may be polyurethane foam or melamine foam.

[0104] In some embodiments, when the pole 11 faces the first gap 31 , the buffer may be filled between the pole 11 and the bottom cover 23 , so that the buffer can be used to buffer the collision between the pole 11 and the bottom cover 23 .

[0105] In other embodiments, when the pole 11 faces the second gap 32 , the buffer may be filled between the bottom plate 24 and the bottom cover 23 , so that the buffer can be used to buffer the collision between the bottom plate 24 and the bottom cover 23 .

[0106] In some embodiments, a buffer member may be filled between the battery cell 1 and the box body 21 , so that the buffer member can be used to buffer the collision between the battery cell 1 and the box body 21 .

[0107] By providing a buffering member between the top cover 22 and the bottom cover 23 , the collision resistance of the battery 100 is improved.

[0108] In some embodiments, the number n of battery cells 1 is less than or equal to ten.

[0109] By setting a more reasonable number of battery cells 1 , the box body 2 does not need to bear too much weight of the battery cells 1 , and the volume required for the box body 2 does not need to be too large, thereby improving the structural utilization of the battery 100 .

[0110] According to some embodiments of the present application, some further embodiments of the present application further provide an electric device, which includes the battery 100 in any of the above embodiments, and the battery 100 is used to provide electrical energy.

[0111] According to some embodiments of the present application, a battery 100 is provided, comprising a housing 2 and a battery cell 1. The housing 2 comprises a housing body 21, and a top cover 22 and a bottom cover 23 disposed oppositely on either side of the housing body 21 along a first direction X. The battery cell 1 is disposed within the housing 2, and comprises an oppositely disposed terminal post 11 and a bottom cover 12, and a sidewall 13 connected between the terminal post 11 and the bottom cover 12. A first gap 31 exists between the battery cell 1 and the bottom cover 23, and a second gap 32 exists between the battery cell 1 and the housing body 21. The terminal post 11 is disposed toward the first gap 31 and / or the second gap 32. When the battery cell 1 is arranged toward the first gap 31, multiple battery cells 1 are arranged side by side along the second direction Y and / or the third direction Z, the bottom 12 of the battery cell 1 is connected to the top cover 22 of the box body 2, and the pole 11 and the bottom cover 23 are filled with buffer material. The number n of battery cells 1, the weight G of a single battery cell 1, the top cover thickness T1 of the top cover 22, and the bottom cover thickness T2 of the bottom cover 23 satisfy the following relationship: 0.1≤(T1+T2) / n*G≤16.5, where the number n of battery cells 1 is less than or equal to 10. When the battery cells 1 are arranged toward the second gap 32, multiple battery cells 1 are arranged side by side along the first direction X and / or the third direction Z. The box body 2 also has a bottom plate 24 arranged between the top cover 22 and the bottom cover 23. The side wall 13 of the battery cell 1 close to the side of the bottom plate 24 is connected to the bottom plate 24. The bottom plate 24 and the bottom cover 23 are filled with buffer material. The number n of battery cells 1, the weight G of a single battery cell 1, the top cover thickness T1 of the top cover 22 and the bottom plate thickness T3 of the bottom plate 24 satisfy the following relationship: 0.1≤(T1+T3) / n*G≤16.5, where the number n of battery cells 1 is less than or equal to 10.

[0112] Those skilled in the art should understand that the above embodiments are exemplary rather than restrictive. Different technical features appearing in different embodiments can be combined to achieve beneficial effects. Based on a study of the drawings, specifications and claims, those skilled in the art should be able to understand and implement other variations of the disclosed embodiments. In the claims, the term "comprising" does not exclude other devices or steps; when an item is not modified by a quantifier, it is intended to include one / kind or more / kinds of items and can be used interchangeably with "one / kind or more / kinds of items"; the terms "first" and "second" are used to identify names rather than to indicate any specific order. Any figure marks in the claims should not be understood as limiting the scope of protection. The functions of multiple parts appearing in the claims can be implemented by a separate hardware or software module. The fact that certain technical features appear in different dependent claims does not mean that these technical features cannot be combined to achieve beneficial effects.

Claims

1. A battery comprising: A box body (2), the box body (2) comprising a box body (21) and a top cover (22) and a bottom cover (23) arranged opposite to each other on both sides of the box body (21) along a first direction; A battery cell (1), the battery cell (1) being arranged in the box (2), the battery cell (1) comprising a pole (11), There is a gap (3) between the battery cell (1) and at least one of the bottom cover (23) and the box body (21), and the pole (11) is arranged toward the gap (3).

2. The battery according to claim 1, wherein The gap (3) includes a first gap (31) between the battery cell (1) and the bottom cover (23), the pole (11) faces the first gap (31), and the battery cell (1) also includes a bottom (12) arranged opposite to the pole (11) in the first direction, and the bottom (12) is connected to the top cover (22).

3. The battery according to claim 2, wherein The top cover thickness T1 of the top cover (22) and the bottom cover thickness T2 of the bottom cover (23) satisfy the following relationship: 0.3mm≤T1+T2≤16.5mm.

4. The battery according to claim 2, wherein The battery cell (1) further includes a side wall (13) connected between the pole (11) and the bottom (12), Wherein, a plurality of the battery cells (1) are arranged side by side along the second direction and / or the third direction, the side walls (13) of two adjacent battery cells (1) are connected, and the first direction, the second direction and the third direction intersect with each other.

5. The battery according to claim 4, wherein The number n of the battery cells (1), the weight G of a single battery cell (1), the top cover thickness T1 of the top cover (22), and the bottom cover thickness T2 of the bottom cover (23) satisfy the following relationship: 0.1≤(T1+T2) / n*G≤16.

5.

6. The battery according to claim 1, wherein The gap (3) includes a second gap (32) between the battery cell (1) and the box body (21), and the pole (11) is arranged toward the second gap (32).

7. The battery according to claim 6, wherein The box body (2) further includes a bottom plate (24) arranged between the top cover (22) and the bottom cover (23); the battery cell (1) further includes a bottom (12) arranged opposite to the pole (11) in the second direction and a side wall (13) connected between the pole (11) and the bottom (12); the side wall (13) is connected to the bottom plate (24); the bottom plate (24) and the bottom cover (23) are spaced apart, and the first direction intersects with the second direction.

8. The battery according to claim 7, wherein The top cover thickness T1 of the top cover (22) and the bottom plate thickness T3 of the bottom plate (24) satisfy the following relationship: 0.3mm≤T1+T3≤16.5mm.

9. The battery according to claim 7, wherein A plurality of battery cells (1) are arranged side by side along the first direction and / or the third direction, the side walls (13) of two adjacent battery cells (1) are connected, and the first direction, the second direction and the third direction intersect in pairs.

10. The battery according to claim 9, wherein The number n of the battery cells (1), the weight G of a single battery cell (1), the top cover thickness T1 of the top cover (22), and the bottom plate thickness T3 of the bottom plate (24) satisfy the following relationship: 0.1≤(T1+T3) / n*G≤16.

5.

11. The battery according to any one of claims 1 to 10, wherein A buffer is filled between the top cover (22) and the bottom cover (23), and the buffer is used to provide buffering when the battery is hit.

12. The battery according to any one of claims 1 to 10, wherein The number n of the battery cells (1) is less than or equal to 10.

13. An electrical device comprising the battery according to claims 1 to 12, wherein the battery is used to provide electrical energy.

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