Battery module and electric equipment

Abstract

The utility model provides a battery module and electric equipment, and relates to the technical field of batteries. The battery module comprises a shell, a cover body, a plurality of limiting cavities and single batteries, the shell is provided with an opening and comprises a bottom wall opposite to the opening. The cover body covers the opening and is provided with a first through hole. The multiple limiting cavities are formed in the side, facing the cover body, of the bottom wall and the side, facing the bottom wall, of the cover body correspondingly. The battery monomers are contained in the shell, the two ends of the battery monomers are inserted into the limiting cavities of the bottom wall and the cover body respectively, and the ends of the battery monomers penetrate through the first through holes. And under the action of the limiting cavities, the positions of the battery monomers in the shell are limited, so that the risk of collision between the adjacent battery monomers is reduced, and the safety of the battery module is improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of battery, in particular to a battery module and an electric device. BACKGROUND

[0002] The battery module is an important component in the battery system, which is connected by a plurality of battery monomers in series, parallel or series-parallel manner. Generally speaking, the structure of the battery module usually includes a shell, a battery management system and battery monomers, the battery monomers are contained in the shell, and the battery management system is used for monitoring and managing the state and parameters of the battery monomers.

[0003] In the traditional battery module, the battery monomers are arranged in the shell in a certain manner, and the battery monomers abut against each other. For example, in the structure disclosed in the prior art battery module (CN103000835A), the battery monomers are arranged between the end plates. Although this structure can ensure the energy density of the battery module, it also causes the battery monomers to easily collide with each other, thereby reducing the safety of the battery module. UTILITY MODEL CONTENT

[0004] One of the technical problems to be solved by the present application is how to improve the safety of the battery module.

[0005] To solve the above technical problems, on the one hand, the present application provides a battery module, which includes a shell, a cover, a plurality of limiting cavities and battery monomers. The shell is provided with an opening, and the shell includes a bottom wall opposite to the opening. The cover is arranged on the opening, and the cover is provided with a first through hole. The plurality of limiting cavities are respectively arranged on the side of the bottom wall facing the cover and the side of the cover facing the bottom wall. The battery monomers are contained in the shell, the two ends of the battery monomers are respectively inserted into the limiting cavities of the bottom wall and the cover, and the end portion of the battery monomers is arranged through the first through hole.

[0006] In some embodiments, the bottom wall and the cover are respectively provided with a limiting assembly, and the limiting assembly includes two limiting portions arranged at intervals, and a limiting cavity is formed between the two limiting portions.

[0007] In some embodiments, the two limiting portions include a first side arranged oppositely and a second side arranged oppositely, the first side is provided with a recessed portion, and the second side is connected to the shell / cover through a chamfered portion.

[0008] In some embodiments, the second side is an inwardly curved side facing away from the first side.

[0009] In some embodiments, the limiting portion is provided with one recessed portion, or a plurality of recessed portions are arranged at intervals along the length direction of the limiting portion.

[0010] In some embodiments, a bolt is further included, the bolt connects the cover and the shell, and the bolt is arranged between the two adjacent limiting cavities.

[0011] In some embodiments, the first through hole includes a first hole segment and a second hole segment, the first hole segment being disposed on the side of the cover facing the housing, and the diameter of the first hole segment being larger than the diameter of the second hole segment.

[0012] In some embodiments, the housing includes a plurality of sidewalls connected to the bottom wall, the plurality of sidewalls forming an opening, and the sidewalls being provided with a second through hole.

[0013] In some embodiments, the housing includes a plurality of sidewalls connected to the bottom wall, the plurality of sidewalls forming an opening, the sidewalls including a first surface facing away from the bottom wall, the first surface being provided with a protrusion for positioning the cover.

[0014] On the other hand, this application also provides an electrical device, including the battery module in the above embodiments.

[0015] With the above technical solution, when the cover is placed over the opening, both ends of the battery cell are inserted into the limiting cavity. On the one hand, the limiting cavity restricts the position of the battery cell within the casing, reducing the risk of collision between adjacent battery cells and thus improving the safety of the battery module. On the other hand, the limiting cavity maintains a certain gap between the battery cells, increasing the heat dissipation of the battery module and further enhancing its safety. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 A schematic diagram of the external structure of a battery module provided in some embodiments of this application;

[0018] Figure 2 for Figure 1 Enlarged view of point A;

[0019] Figure 3 This is a schematic diagram of the internal structure of a battery module provided in some embodiments of this application;

[0020] Figure 4 for Figure 3 Enlarged view of point B;

[0021] Figure 5 for Figure 3 Enlarged view of point C;

[0022] Figure 6A top view structural schematic diagram of a battery module provided for some embodiments of the present application.

[0023] Explanation of reference signs:

[0024] 1, housing; 2, cover; 3, battery monomer; 4, bolt; 5, limiting part; 6, limiting cavity; 7, second through hole; 8, second side; 9, first side; 10, side wall; 11, bottom wall; 12, recessed part; 13, protruding part; 14, first surface; 15, second hole section; 16, first hole section; 17, first through hole. DETAILED DESCRIPTION

[0025] The embodiments of the present application will be further described in conjunction with the drawings and examples. The detailed description and drawings of the following examples are used to illustrate the principles of the present application, but cannot be used to limit the scope of the present application, and the present application can be implemented in many different forms, not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

[0026] The present application provides these embodiments in order to make the present application thorough and complete, and fully express the scope of the present application to those skilled in the art. It should be noted that: unless otherwise specified, the relative arrangement of components and steps, the composition of materials, numerical expressions and values set forth in these embodiments should be interpreted as merely exemplary, and not as a limitation.

[0027] It should be noted that, in the description of the present application, unless otherwise specified, the meaning of "a plurality of" is greater than or equal to two; the orientation or positional relationship indicated by the terms "upper", "lower", "left", "right", "inner", "outer" and the like is only for the convenience of describing the present application and simplifying the description, and does not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application. When the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0028] In addition, "first", "second", and similar words used in the present application do not represent any order, number or importance, but are only used to distinguish different parts. "Vertical" is not strictly vertical, but within the allowable range of error. "Parallel" is not strictly parallel, but within the allowable range of error. "Include" or "contain" and similar words mean that the elements before the word cover the elements listed after the word, and do not exclude the possibility of also covering other elements.

[0029] It should be noted that, in the description of the present application, unless otherwise explicitly specified and limited, the terms "mounting", "connecting", "connection" should be understood in a broad sense, for example, can be fixed connection, can also be detachable connection, or integrally connected; can be directly connected, or indirectly connected through an intermediate medium. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances. When it is described that a specific device is located between the first device and the second device, there can be or can not be an intermediate device between the specific device and the first device or the second device.

[0030] All the terms used in the present application have the same meaning as understood by those skilled in the art to which the present application belongs, unless otherwise specifically defined. It should also be understood that the terms defined in general dictionaries should be interpreted to have meanings consistent with their meanings in the context of the relevant technology, and should not be interpreted in an idealized or excessively formalized sense, unless specifically defined here.

[0031] The techniques, methods, and devices known to those skilled in the relevant art can not be discussed in detail, but in appropriate cases, the techniques, methods, and devices should be considered as part of the specification.

[0032] Reference Figure 1 In one aspect, the embodiments of the present application provide a battery module, comprising a shell 1, a cover 2, a plurality of limiting cavities 6 and battery monomers 3. The shell 1 is provided with an opening, and the shell 1 comprises a bottom wall 11 arranged opposite to the opening. The cover 2 is arranged on the opening, and the cover 2 is provided with a first through hole 17. The plurality of limiting cavities 6 are respectively arranged on the side of the bottom wall 11 facing the cover 2 and the side of the cover 2 facing the bottom wall 11. The battery monomers 3 are accommodated in the shell 1, the two ends of the battery monomers 3 are respectively inserted into the limiting cavities 6 of the bottom wall 11 and the cover 2, and the end of the battery monomers 3 is arranged through the first through hole 17.

[0033] The battery monomer 3 is the smallest unit of the power battery module, and the battery monomer 3 is the basic device and basic unit for directly converting chemical energy into electrical energy. The battery monomer 3 usually comprises a shell and electrode materials, electrolyte and diaphragm accommodated in the shell, and the shell is provided with connecting parts for connecting with positive electrode materials and negative electrode materials respectively. Commonly, the battery monomer 3 is packaged as a cylindrical shape, a square shape or a soft package. The cylindrical and square hard shell battery monomers 3 can be directly applied to the shell 1 of the embodiments of the present application, and the soft package battery monomer 3 needs to be adjusted to be suitable, for example, a hard protective shell is arranged outside the soft package battery monomer 3.

[0034] The shell 1 forms a mounting space on one hand, and the battery monomer 3, the battery management system (BMS) and the cooling system can be installed in the shell 1. On the other hand, the shell 1 can provide a physical protection layer, which can protect the components contained therein.

[0035] The opening of the shell 1 is used to put other components into the shell 1.

[0036] The bottom wall 11 can form the mounting surface of the battery monomer 3, and the weight of the battery monomer 3 is supported by the bottom wall 11.

[0037] The cover 2 is covered on the shell 1, so that the opening of the shell 1 can be closed by the cover 2. The first through hole 17 of the cover 2 is used for the part of the battery monomer 3 to pass out, which can connect the battery monomer 3 with the outside on one hand, and can be used for positioning the battery monomer 3 on the other hand. For example, it can be the positive or negative connector of the shell of the battery monomer 3.

[0038] The limiting cavities 6 of the bottom wall 11 and the cover 2 are arranged in pairs. One battery monomer 3 or multiple battery monomers 3 can be arranged between the two limiting cavities 6 arranged in pairs.

[0039] When the cover 2 is covered on the opening, the two ends of the battery monomer 3 are respectively inserted into the limiting cavities 6. On one hand, under the action of the limiting cavities 6, the position of the battery monomer 3 in the shell 1 is limited, which reduces the risk of collision between adjacent battery monomers 3, thereby improving the safety of the battery module. On the other hand, under the action of the limiting cavities 6, a certain gap can be maintained between the battery monomers 3, which increases the heat dissipation effect of the battery module and further improves the safety of the battery module.

[0040] Referring to Figure 1 and Figure 2 In some embodiments, the bottom wall 11 and the cover 2 are respectively provided with a limiting assembly, and the limiting assembly comprises two limiting parts 5 arranged at intervals, and the limiting cavity 6 is formed between the two limiting parts 5.

[0041] When the two limiting parts 5 are arranged at intervals, there is a gap between the two limiting parts 5, which can be used to form the limiting cavity 6.

[0042] In order to increase the fixing effect of the limiting cavity 6 on the battery monomer 3, the opposite sides of the two limiting parts 5 can be provided with an adaptive structure, for example, a recess, an adhesive layer and the like.

[0043] The two limiting parts 5 are arranged at intervals, which not only makes the limiting cavity 6 formed by the limiting part 5 be able to position the battery monomer 3, but also makes the limiting cavity 6 be partially open, thereby increasing the heat dissipation effect of the battery monomer 3.

[0044] Referring toFigure 3 and Figure 4 In some embodiments, the two limiting portions 5 include a first side 9 arranged oppositely and a second side 8 arranged oppositely, the first side 9 is provided with a recess 12, and the second side 8 is connected to the shell 1 / cover 2 through a chamfer portion.

[0045] The chamfer portion refers to that the wall surface of the second side 8 is partially away from the first side 9, so that the thickness of the limiting portion 5 is increased.

[0046] The recess 12 provided on the first side 9 is used for positioning the battery monomer 3, which reduces the risk of the battery monomer 3 being pulled out of the limiting cavity 6.

[0047] The second side 8 connected to the shell 1 / cover 2 through the chamfer portion refers to that the second side 8 of the limiting portion 5 arranged on the shell 1 is connected to the shell 1 through the chamfer portion, and the second side 8 of the limiting portion 5 arranged on the cover 2 is connected to the cover 2 through the chamfer portion.

[0048] By arranging the chamfer portion on the second side 8, the connection strength of the limiting portion 5 and the corresponding shell 1 or cover 2 can be increased.

[0049] Referring to Figure 4 In some embodiments, the second side 8 is a curved surface with an inwardly curved side facing away from the first side 9.

[0050] That is, the second side 8 forms a chamfer portion in the shape of a circular arc.

[0051] The inwardly curved side faces away from the first side 9, which can not only strengthen the chamfer portion for the limiting portion 5, but also reduce the space occupied by the chamfer portion.

[0052] In some embodiments, the limiting portion 5 is provided with one recess 12, or a plurality of recesses 12 are arranged at intervals along the length direction of the limiting portion 5.

[0053] The limiting portion 5 is provided with one recess 12, that is, one limiting portion 5 can be used for positioning one battery monomer 3.

[0054] A plurality of recesses 12 are arranged along the length direction of the limiting portion 5, so that one limiting portion 5 can be used for positioning a plurality of battery monomers 3. The advantage of this arrangement is that the limiting portion 5 can be arranged longer, so that the connection strength of the limiting portion 5 and the shell 1 / cover 2 is increased, further increasing the safety of the battery module.

[0055] Referring to Figure 1 and Figure 6 In some embodiments, the battery module further includes a bolt 4, the bolt 4 connects the cover 2 and the shell 1, and the bolt 4 is arranged between two adjacent limiting cavities 6.

[0056] The specific way of connecting the cover 2 and the shell 1 by the bolt 4 can be selected in the existing structure, for example, the head of the bolt 4 can abut against the cover 2, and the shank of the bolt 4 can be threadedly connected to the shell 1.

[0057] The bolt 4 is arranged between the limiting cavities 6, on the one hand, so that the bolt 4 can be arranged in the gap between two adjacent battery monomers 3, thereby improving the space utilization. On the other hand, the force of the bolt 4 on the cover 2 is more uniform, thereby increasing the service life of the cover 2.

[0058] Referring to Figure 5 In some embodiments, the first through hole 17 includes a first hole section 16 and a second hole section 15, the first hole section 16 is arranged on the side of the cover 2 facing the shell 1, and the diameter of the first hole section 16 is greater than that of the second hole section 15.

[0059] The first hole section 16 can be used to accommodate the end of the battery monomer 3, so that the first through hole 17 can play a positioning role on the battery monomer 3.

[0060] The second hole section 15 can be used for the positive or negative connector of the battery monomer 3 to pass out, so that the battery monomer 3 can be connected with external components.

[0061] The diameter of the first hole section 16 is greater than that of the second hole section 15, on the one hand, which can play a foolproof role when the cover 2 is installed, that is, by judging the hole diameter, it can be judged which side of the cover 2 faces the shell 1. On the other hand, it reduces the risk of excessive decrease in the structural strength of the cover 2 due to the arrangement of the first through hole 17.

[0062] The first hole section 16 can be in communication with the inside of the limiting cavity 6, that is, the battery monomer 3 is first inserted into the limiting cavity 6, and then enters the first hole section 16.

[0063] Referring to Figure 1 In some embodiments, the shell 1 includes a plurality of side walls 10 connected to the bottom wall 11, the plurality of side walls 10 enclose an opening, and the side wall 10 is provided with a second through hole 7.

[0064] The second through hole 7 makes the shell 1 partially open, thereby enabling the second through hole 7 to play a heat dissipation role, increasing the heat dissipation capacity of the battery module, and thereby improving the safety of the battery module. At the same time, since the bottom wall 11 and the cover 2 are provided with the limiting portion 5, the battery monomer 3 will not leak out through the second through hole 7.

[0065] Referring to Figure 5 and Figure 6 In some embodiments, the shell 1 includes a plurality of side walls 10 connected to the bottom wall 11, the plurality of side walls 10 enclose an opening, and the side wall 10 includes a first face 14 facing away from the bottom wall 11, the first face 14 is provided with a protruding portion 13 for positioning the cover 2.

[0066] The first surface 14 can form an open end surface.

[0067] When the cover 2 is covered on the opening, the cover 2 can be covered on the first surface 14, at this time, the protruding part 13 can be arranged around the circumference of the cover 2, so that the protruding part 13 can position the cover 2, and the matching precision of the cover 2 and the shell 1 is improved.

[0068] On the other hand, the embodiments of the present application also provide a power-using device, which comprises the battery module in the above embodiments.

[0069] The battery module can be used to supply power to the power-using device, and the specific power supply mode of the battery module is known to those skilled in the art. Since the battery module of the embodiments of the present application has the advantage of high safety, the safety of the power-using device is also improved.

[0070] For example, the power-using device can be a new energy vehicle, a mobile power supply, a computer, etc.

[0071] So far, the embodiments of the present application have been described in detail. In order to avoid obscuring the concept of the present application, some details known in the art are not described. Those skilled in the art can fully understand how to implement the technical solutions disclosed herein according to the above description.

[0072] Although some specific embodiments of the present application have been described in detail through examples, those skilled in the art should understand that the above examples are only for illustration, and are not intended to limit the scope of the present application. Those skilled in the art should understand that the above embodiments can be modified or some technical features can be replaced equivalently without departing from the scope and spirit of the present application. In particular, as long as there is no structural conflict, each technical feature mentioned in each embodiment can be combined in any way.

Claims

1. A battery module, characterized by, The battery module comprises: a shell (1) provided with an opening, the shell (1) comprising a bottom wall (11) arranged opposite to the opening; a cover (2) covering the opening, the cover (2) being provided with a first through hole (17); a plurality of limiting cavities (6) arranged on a side of the bottom wall (11) facing the cover (2) and a side of the cover (2) facing the bottom wall (11) respectively; a battery monomer (3) accommodated in the shell (1), two ends of the battery monomer (3) being respectively inserted into the limiting cavities (6) of the bottom wall (11) and the cover (2), and an end portion of the battery monomer (3) penetrating through the first through hole (17).

2. The battery module of claim 1, wherein, The bottom wall (11) and the cover (2) are respectively provided with a limiting assembly, the limiting assembly comprising two limiting portions (5) arranged at intervals, and the limiting cavities (6) being formed between the two limiting portions (5).

3. The battery module of claim 2, wherein, The two limiting portions (5) comprise a first side (9) arranged oppositely and a second side (8) arranged oppositely, the first side (9) is provided with a recess (12), and the second side (8) is connected to the shell (1) / cover (2) through a chamfered portion.

4. The battery module of claim 3, wherein, The second side (8) is a curved surface with the inner side facing away from the first side (9).

5. The battery module of claim 3, wherein, The limiting portion (5) is provided with one recess (12), or a plurality of recesses (12) are arranged at intervals along the length direction of the limiting portion (5).

6. The battery module of claim 1, wherein, Further comprising a bolt (4) connecting the cover (2) and the shell (1), the bolt (4) being arranged between adjacent two limiting cavities (6).

7. The battery module of claim 1, wherein, The first through hole (17) comprises a first hole section (16) and a second hole section (15), the first hole section (16) being arranged on a side of the cover (2) facing the shell (1), and a diameter of the first hole section (16) being greater than a diameter of the second hole section (15).

8. The battery module of claim 1, wherein, The shell (1) comprises a plurality of side walls (10) connected to the bottom wall (11), the plurality of side walls (10) surrounding the opening, and the side wall (10) being provided with a second through hole (7).

9. The battery module of claim 1, wherein, The shell (1) comprises a plurality of side walls (10) connected to the bottom wall (11), the plurality of side walls (10) surrounding the opening, and the side wall (10) comprising a first surface (14) facing away from the bottom wall (11), the first surface (14) being provided with a protruding portion (13) for positioning the cover (2).

10. An electric device, characterized by The battery module comprises any one of claims 1-9.

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