Box body, battery and electric device

Abstract

The utility model relates to a box body, a battery and an electric device. The box body comprises a bottom plate; the side plate is arranged on one side of the bottom plate, and the side plate is arranged in the circumferential direction of the bottom plate and defines a containing area; and the at least two limiting plates are located in the accommodating area, and all the limiting plates protrude out of the sides, away from the bottom plate, of the side plates and jointly define a limiting space for limiting the single batteries. According to the box body, the battery and the power utilization device provided by the invention, the number and types of parts of the battery can be reduced, and the assembly process can be simplified.

Description

Technical Field

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

[0002] Batteries have become widely popular and used in various fields due to their superior fast charging, long life, long battery life, high cost performance, and safety.

[0003] A battery generally includes a box body, a box cover, and a plurality of battery cells. The box body and the box cover enclose a storage space for accommodating the battery cells. All the battery cells are arranged in the box body and are used to store electrical energy.

[0004] In traditional batteries, multiple battery cells need to be pre-assembled into a battery module through end plates, insulation pads and other components, and then the battery module is assembled into a box body, and then sealed with a box cover. This assembly method increases the number and types of battery components, and the assembly process is more complicated. Utility Model Content

[0005] Based on this, it is necessary to provide a box, a battery and an electrical device that can reduce the number and types of battery parts and simplify the assembly process in order to solve the above problems.

[0006] A box body, comprising:

[0007] Base plate;

[0008] A side plate is disposed on one side of the bottom plate, and the side plate is disposed along the circumference of the bottom plate and encloses a receiving area; and

[0009] At least two limiting plates are located in the receiving area, and all the limiting plates protrude from a side of the side plate away from the bottom plate, and jointly define a limiting space for limiting the battery monomer.

[0010] In some embodiments, there are two limiting plates, namely a first limiting plate and a second limiting plate. The first limiting plate and the second limiting plate are spaced apart along the length direction of the bottom plate and define the limiting space.

[0011] In some embodiments, all the limiting plates are connected to the base plate by gluing or welding.

[0012] In some of the embodiments, a connecting piece is further included, and all the limiting plates are connected via the same connecting piece.

[0013] In some embodiments, the connecting member is a connecting steel belt, and the connecting steel belt is sleeved outside all the limiting plates.

[0014] In some embodiments, the connecting steel belt is sleeved on one end of all the limiting plates away from the bottom plate.

[0015] In some embodiments, each of the limiting plates is provided with a limiting groove, and the connecting steel belt is clamped in the limiting groove of each of the limiting plates.

[0016] A battery, comprising:

[0017] A box as described in any one of the above embodiments; and

[0018] There are multiple battery cells, and all of the battery cells are confined within the confining space.

[0019] In some embodiments, the end surface of the side plate away from the bottom plate defines an opening of the box body, and the box cover is sleeved outside the side plate to close the opening of the box body.

[0020] An electrical device comprises the battery as described in the above embodiment, and the battery is used to provide electrical energy.

[0021] The above-mentioned box, battery and electrical device are provided with at least two limit plates in the box, and all the limit plates protrude from the side of the side plate away from the bottom plate, and jointly define a space for limiting. For a box with a very low side plate height, all the limit plates cooperate with the bottom plate and the side plate to form a box with greater rigidity, and all the limit plates can support and limit all battery cells. In this way, the battery module itself does not need very strong rigidity, the number and types of parts of the battery module are reduced, and the assembly process is also reduced accordingly. Therefore, under the design of the box in the present application, the use of the box can facilitate the assembly of the battery module, reduce the number and types of battery parts, and simplify the assembly process of the battery, thereby reducing the manufacturing cost of the battery and improving the assembly efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 This is a schematic diagram of the structure of the battery module and the box body in the battery of one embodiment of the present application;

[0023] Figure 2 for Figure 1 A schematic diagram of the structure of the box in the battery shown;

[0024] Figure 3 for Figure 2 An enlarged schematic diagram of a local structure A of the box shown;

[0025] Figure 4 for Figure 2 The schematic diagram of the structure of the box shown in the figure after removing the connecting parts;

[0026] Figure 5 for Figure 4 The schematic diagram of the structure of the box body after removing the limit plate is shown.

[0027] Figure Number:

[0028] 1.Battery;

[0029] 10. Battery module; 20. Box;

[0030] 11. Battery cells;

[0031] 21. Bottom plate; 22. Side plate; 221. Accommodation area; 23. Limiting plate; 231. Limiting groove; 232. Limiting space; 24. Connector. DETAILED DESCRIPTION

[0032] In order to make the above-mentioned purposes, features and advantages of the present application more obvious and easy to understand, the specific implementation methods of the present application are described in detail below in conjunction with the accompanying drawings. In the following description, many specific details are set forth to facilitate a full understanding of the present application. However, the present application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without violating the connotation of the present application, so the present application is not limited by the specific embodiments disclosed below.

[0033] In the description of the present application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing 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 and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0034] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of this application, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0035] In this application, unless otherwise clearly specified and limited, the terms "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, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0036] In the present application, unless otherwise clearly specified and limited, a first feature being “above” or “below” a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being “above”, “above”, and “above” a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being “below”, “below”, and “below” a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0037] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it may be directly on the other element or there may be a central element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. The terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used herein are for illustrative purposes only and are not intended to be the only implementation method.

[0038] See also Figure 1 At present, from the perspective of market development, the application of battery 1 is becoming more and more extensive. Battery 1 is not only used in energy storage power systems such as hydropower, thermal power, wind power and solar power stations, but also widely used in electric vehicles such as electric bicycles, electric motorcycles, electric cars, as well as military equipment and aerospace and other fields. With the continuous expansion of the application field of battery 1, its market demand is also constantly expanding.

[0039] The battery 1 generally includes a box body 20 , a box cover, and a plurality of battery cells 11 . The box body 20 and the box cover enclose a storage space for accommodating the battery cells 11 . All the battery cells 11 are disposed in the box body 20 and are used to store electrical energy.

[0040] In a traditional battery 1, multiple battery cells 11 need to be pre-assembled through end plates, thermal insulation pads and other components to form a battery module 10, and then the battery module 10 is loaded into a box body 20 and then sealed with a box cover. This assembly method increases the number and types of components of the battery 1, and the assembly process is relatively complicated.

[0041] Please also read Figures 1 to 5 In order to alleviate the above problems, the applicant has designed a box body 20 after in-depth research. The box body 20 includes a bottom plate 21, a side plate 22 and at least two limiting plates 23. The side plate 22 is arranged on one side of the bottom plate 21, and the side plate 22 is arranged along the circumference of the bottom plate 21 and encloses a receiving area 221. All limiting plates 23 are located in the receiving area 221, and all limiting plates 23 protrude from the side of the side plate 22 away from the bottom plate 21, and jointly define a limiting space 232 for limiting the battery cell 11.

[0042] by Figure 2 Taking the state of the middle box body 20 as an example, the side plates 22 and all the limiting plates 23 are located on the top side of the bottom plate 21 , and all the limiting plates 23 protrude from the top side of the side plates 22 .

[0043] The bottom plate 21 and the side plates 22 are combined to form a frame of the box body 20 . All the limiting plates 23 are located in a receiving area 221 formed by the side plates 22 . All the limiting plates 23 cooperate with and limit the battery cells 11 .

[0044] As an example, the number of limit plates 23 can be set according to demand. For example, taking the bottom plate 21 as a rectangle, the limit plates 23 can be arranged at intervals along the length direction and / or width direction of the bottom plate 21, or the limit plates 23 can also be arranged at intervals along the circumference of the bottom plate 21.

[0045] In order to reduce the risk of thermal runaway of the battery 1 , a cooling channel for the flow of coolant is also provided in the bottom plate 21 . The coolant can absorb the heat generated during the operation of the battery 1 and reduce the temperature of the battery 1 .

[0046] At present, for a box 20 with a very low side panel 22, since the battery module 10 will protrude from the box 20 during installation, the battery module 10 itself needs to have a certain rigidity to facilitate installation of the battery module 10. In view of this situation, the design of the battery module 10 generally includes the following two solutions:

[0047] Solution 1: Battery cells 11 are arranged in rows to form a battery row, and then end plates are arranged on both sides of the battery row along its length direction. Then, insulating pads and / or heat insulating pads are installed between each end plate and the battery row. After that, the above components are bundled with plastic tape to form a battery module 10, and finally each end plate of the battery module 10 is fixed to the bottom plate 21 of the box body 20 by bolts.

[0048] Solution 2: End plates are set on both sides of the battery row along its length direction, and baffles are set on both sides of the battery row along its width direction. Then, insulating pads and / or thermal insulation pads are installed between each end plate and the battery row, and / or between each baffle and the battery row. Finally, each end plate and / or each baffle of the battery module 10 is fixed to the bottom plate 21 of the box body 20 by bolts.

[0049] The above-mentioned schemes 1 and 2 are for a box body 20 with a very low side panel 22, and a single or multiple battery modules 10 are installed in the box body 20. Each battery module 10 needs to be provided with an end plate and a plastic belt, or each battery module 10 needs to be provided with an end plate and a baffle, etc. This design method not only easily increases the number and types of parts of the battery 1, but also makes the assembly process more complicated.

[0050] In the present application, at least two limiting plates 23 are arranged in the box 20, and all the limiting plates 23 protrude from the side of the side plate 22 away from the bottom plate 21, and jointly define a limiting space 232. For the box 20 with a very low height of the side plate 22, all the limiting plates 23 cooperate with the bottom plate 21 and the side plate 22 to form a box 20 with greater rigidity, and all the limiting plates 23 can support and limit all battery modules 10 formed by all battery cells 11. In this way, the battery module 10 itself does not need very strong rigidity, so only the battery cell 11, and the insulating pad and / or the heat insulating pad are retained to form the battery module 10, and the number and type of parts of the battery module 10 are reduced, and the assembly process is also reduced accordingly. Therefore, under the design of the box 20 in the present application, the use of the box 20 can facilitate the assembly of the battery module 10, and can reduce the number and type of parts of the battery 1, and simplify the assembly process of the battery 1, the manufacturing cost of the battery 1 is reduced, and the assembly efficiency is improved.

[0051] It is worth mentioning that in order to improve the installation reliability of the battery module 10 , glue can also be brushed on the area of ​​the bottom plate 21 facing the limiting space 232 , and the battery module 10 can also be bonded to the bottom plate 21 when it is in the limiting space 232 .

[0052] Please refer again Figure 2 , Figure 3 and Figure 4In some optional embodiments, there are two limit plates 23, namely a first limit plate and a second limit plate, which are arranged at intervals along the length direction of the bottom plate 21 and define a limit space 232. Each battery module 10 is located in the limit space 232 and is limited between the first limit plate and the second limit plate. The limit space 232 formed in this way has a larger volume and can accommodate more groups of battery modules 10, which is beneficial to improving the energy density of the battery 1.

[0053] In some optional embodiments, all the limit plates 23 are connected to the bottom plate 21 by gluing or welding. Compared with screwing or riveting, the limit plates 23 and the bottom plate 21 are connected by this method, and there is no need to punch holes on the bottom plate 21, which can avoid perforation of the bottom plate 21 and improve the air tightness of the box 20. Moreover, gluing or welding is usually a surface connection, which is less likely to cause stress concentration than point connection methods such as screwing or riveting, thereby improving the structural strength of the box 20.

[0054] In some optional embodiments, the box 20 further includes a connector 24, and all the limit plates 23 are connected by the same connector 24. By providing the connector 24, the connector 24 can connect all the limit plates 23 to form a whole, so that the structural strength of the box 20 is higher and the structural stability is better. In this case, when the battery module 10 expands during operation, the box 20 can still maintain its structural stability and support and limit the battery module 10.

[0055] The connecting member 24 may be a connecting frame, a connecting rope or other connecting structures.

[0056] In some optional embodiments, the connecting member 24 is a connecting steel belt, which is sleeved outside all the limit plates 23. The connecting steel belt has a better connection strength and is not easy to deform, which can improve the reliability of the connection of all the limit plates 23. In addition, the connecting steel belt is sleeved outside all the limit plates 23, and the sleeved method can also facilitate the installation of the connecting steel belt.

[0057] In some optional embodiments, the connecting steel belt is sleeved on the end of all the limiting plates 23 away from the bottom plate 21. In order to reduce the influence of the connecting steel belt on the installation of the battery module 10, the installation height of the connecting steel belt is less than the height of the limiting plate 23. Therefore, the battery module 10 can be installed in the limiting space 232 from the end of all the limiting plates 23 away from the bottom plate 21. Figure 2Taking the state of the middle box body 20 as an example, the end of all the limit plates 23 away from the bottom plate 21 is the top of all the limit plates 23. The connecting steel belt is sleeved on the end of all the limit plates 23 away from the bottom plate 21, so that the connecting steel belt cooperates with the bottom plate 21 to fix the two ends of the limit plates 23. The connecting steel belt, the bottom plate 21 and all the limit plates 23 cooperate to make the box body 20 have better structural stability.

[0058] In some optional embodiments, each limiting plate 23 is provided with a limiting groove 231, and the connecting steel belt is clamped in the limiting groove 231 of each limiting plate 23. The setting of the limiting groove 231 can improve the reliability of the connection between the connecting steel belt and all the limiting plates 23, so as to reduce the risk of the connecting steel belt falling off.

[0059] The present application also provides a battery 1, which includes a box body 20, a box cover, and a plurality of battery cells 11 as described in any of the above embodiments, the end surface of the side plate 22 away from the bottom plate 21 defines an opening of the box body 20, the box cover is sleeved outside the side plate 22 and closes the opening of the box body 20, and all battery cells 11 are limited in the limited space 232. The battery 1 in the present application has the effects brought by any of the above embodiments, so it will not be repeated here.

[0060] Specifically, the box body 20 and the box cover cover each other and define together a storage space for accommodating the battery cell 11, so that the battery cell 11 is isolated from the external environment and the influence of the external environment on the battery cell 11 is reduced. The shell structure formed by the box body 20 and the box cover can be in various shapes, such as a cylinder, a rectangular parallelepiped, etc. Generally speaking, the box body 20 and the box cover are in the shape of a rectangular parallelepiped.

[0061] In the battery 1, there are multiple battery cells 11, and all the battery cells 11 are arranged in a row to form one or more rows of battery rows. The battery cells 11 in the same row can be connected in series, in parallel, or in a mixed connection, and each two adjacent rows of battery rows can also be connected in series, in parallel, or in a mixed connection. Both ends of each battery row are pre-assembled by setting an insulating pad and / or a heat insulating pad to form a battery module 10, and the battery modules 10 are all limited in the limited space 232.

[0062] Each battery cell 11 may be a secondary battery or a primary battery, or a lithium-sulfur battery, a sodium-ion battery or a magnesium-ion battery, but is not limited thereto. The battery cell 11 may be cylindrical, flat, rectangular or in other shapes.

[0063] The present application also provides an electrical device, which includes a battery 1 as described in any one of the above embodiments, and the battery 1 is used to provide electrical energy.

[0064] The electrical device in the present application has the effects described in any of the above embodiments, so they will not be described in detail here.

[0065] The electrical device may be, but is not limited to, a mobile phone, a tablet, a laptop, an electric toy, an electric tool, a battery car, an electric car, a ship, a spacecraft, etc. The electric toy may include a fixed or mobile electric toy, such as a game console, an electric car toy, an electric ship toy, and an electric airplane toy, etc. The spacecraft may include an airplane, a rocket, a space shuttle, and a spacecraft, etc.

[0066] It should be understood that the technical solutions described in the embodiments of the present application are not limited to being applicable to the electrical devices described above.

[0067] The above-mentioned box body 20, battery 1 and electrical device are provided with at least two limiting plates 23 in the box body 20, all limiting plates 23 protrude from the side of the side plate 22 away from the bottom plate 21, and jointly define a limiting space 232. For the box body 20 with a very low height of the side plate 22, all limiting plates 23 cooperate with the bottom plate 21 and the side plate 22 to form a box body 20 with greater rigidity, and all limiting plates 23 can support and limit all battery modules 10 formed by all battery cells 11. In this way, the battery module 10 itself does not need very strong rigidity, so only the battery cell 11, and the insulating pad and / or the heat insulating pad are retained to form the battery module 10, and the number and types of parts of the battery module 10 are reduced, and the assembly process is also reduced accordingly. Therefore, under the design of the box body 20 in the present application, the use of the box body 20 can facilitate the assembly of the battery module 10, reduce the number and types of components of the battery 1, and simplify the assembly process of the battery 1, thereby reducing the manufacturing cost of the battery 1 and improving the assembly efficiency.

[0068] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0069] The above-described embodiments only express several implementation methods of the present application, and the descriptions thereof are relatively specific and detailed, but they cannot be construed as limiting the scope of the patent application. It should be pointed out that, for a person of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the present application, and these all belong to the protection scope of the present application. Therefore, the protection scope of the patent application shall be subject to the attached claims.

Claims

1. A box, characterized in that: The box body comprises: Bottom plate (21); A side plate (22) is arranged on one side of the bottom plate (21), and the side plate (22) is arranged along the circumference of the bottom plate (21) and encloses a receiving area (221); and At least two limiting plates (23) are located in the receiving area (221), and all the limiting plates (23) protrude from a side of the side plate (22) away from the bottom plate (21), and together define a limiting space (232) for limiting the battery cell (11).

2. The box according to claim 1, characterized in that: There are two limit plates (23), which are respectively a first limit plate (23) and a second limit plate (23). The first limit plate (23) and the second limit plate (23) are arranged at intervals along the length direction of the bottom plate (21) and define the limit space (232).

3. The box according to claim 1, characterized in that: All the limiting plates (23) are connected to the bottom plate (21) by gluing or welding.

4. The box according to any one of claims 1 to 3, characterized in that: It also includes a connecting piece (24), and all the limiting plates (23) are connected via the same connecting piece (24).

5. The box according to claim 4, characterized in that: The connecting member (24) is a connecting steel belt, and the connecting steel belt is sleeved outside all the limiting plates (23).

6. The box according to claim 5, characterized in that: The connecting steel belt is sleeved on one end of all the limiting plates (23) away from the bottom plate (21).

7. The box according to claim 5, characterized in that: A limiting groove (231) is provided on each of the limiting plates (23), and the connecting steel belt is clamped in the limiting groove (231) of each of the limiting plates (23).

8. A battery, characterized in that: The battery comprises: A box as claimed in any one of claims 1 to 7; and A plurality of battery cells (11), all of the battery cells (11) are confined within the confining space (232).

9. The battery according to claim 8, characterized in that The end surface of the side plate (22) away from the bottom plate (21) defines an opening of the box body, and the box cover is sleeved outside the side plate (22) and closes the opening of the box body.

10. An electrical device, characterized in that: The electrical device comprises the battery as claimed in claim 8 or 9, and the battery is used to provide electrical energy.

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