CN216488305U - Battery module and unmanned vehicles - Google Patents

Abstract

The application provides a battery module and unmanned vehicles who has it. The battery module includes: a plurality of cells; a fixing member provided with a fixing groove in which an end portion of each of the plurality of battery cells is inserted; a housing in which the plurality of cells and the fixture are housed; and a fastener fastening the fixing member to the housing. Insert the one end of electric core and establish in the fixed slot of mounting to fasten the mounting in the shell through the fastener, make the fixed of electric core more firm, improved the barrier propterty of battery.

Description

Battery module and unmanned vehicles

Technical Field

This application is related to battery technical field, concretely relates to battery module and unmanned vehicles who has it.

Background

The battery is an energy storage device and is widely applied to the fields of unmanned aircrafts, electric automobiles and the like. A battery generally includes a casing and a battery pack made up of a plurality of battery cells housed in the casing.

In the conventional battery, the fixation of the battery pack is not strong enough. The battery pack is easily moved in the case when shock or impact is applied, which may cause damage to the battery. For example, movement of the battery pack within the casing may cause the cells to collide with other parts of the battery, thereby causing damage to the outer casing of the cells.

SUMMERY OF THE UTILITY MODEL

In a first aspect of the present application, a battery module is provided. The battery module includes: a plurality of cells; a fixing member provided with a fixing groove in which an end portion of each of the plurality of battery cells is inserted; a housing in which the plurality of cells and the fixture are housed; and a fastener fastening the fixing member to the housing.

In combination with the first aspect, in some embodiments, the fastening member is a bolt, the housing is provided with a first through hole, and the fixing member is provided with a threaded hole, wherein a head portion of the bolt is disposed outside the housing, and a shaft portion of the bolt passes through the first through hole and is screwed with the threaded hole, thereby fastening the fixing member to the housing.

In combination with the first aspect, in some embodiments, the battery module further includes a buffer pad disposed at an outer side of the housing and wrapping corners of the housing, the buffer pad being provided with a second through hole, wherein a head of the bolt is disposed at the outer side of the buffer pad and a shaft of the bolt passes through the second through hole, thereby fastening the buffer pad to the housing.

With reference to the first aspect, in some embodiments, the outer side surface of the housing is provided with a convex portion, the first through hole penetrates through the convex portion, and the convex portion is inserted into the second through hole.

With reference to the first aspect, in some embodiments, the second through hole has a small diameter section and a large diameter section in order from an inner side of the cushion pad to an outer side of the cushion pad, wherein the head of the bolt is placed in the large diameter section.

With reference to the first aspect, in some embodiments, the battery module further includes a washer having a radial dimension larger than that of the small-diameter section, and the shaft portion of the bolt passes through the washer.

With reference to the first aspect, in some embodiments, the fixing member is embedded with an insert nut, and the threaded hole is a threaded hole of the insert nut.

With reference to the first aspect, in some embodiments, the fixing groove is filled with a pouring sealant, and the end of each of the plurality of battery cells is embedded in the pouring sealant in the fixing groove.

In combination with the first aspect, in some embodiments, the housing includes a bottom case, a spacer and a top case, the spacer is disposed between the top case and the bottom case, and the spacer cooperates with the bottom case and the top case respectively to form a first cavity and a second cavity, wherein the plurality of cells and the fixture are received in the first cavity, and the fastener fastens the fixture to the bottom case; the battery module further comprises a control circuit board, the control circuit board is used for controlling the charging and discharging of the plurality of battery cores, and the control circuit board is accommodated in the second accommodating cavity.

In a second aspect of the present application, an unmanned aerial vehicle is provided. The unmanned aerial vehicle comprises any one of the battery modules in the first aspect.

Insert the one end of electric core and establish in the fixed slot of mounting to fasten the mounting in the shell through the fastener, make the fixed of electric core more firm, improved the barrier propterty of battery.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings needed to be used in the embodiments will be briefly described below.

It is appreciated that the following drawings depict only certain embodiments of the application and are therefore not to be considered limiting of its scope, with other related drawings being accessible to those skilled in the art.

It should also be understood that the same or similar reference numerals are used throughout the figures to indicate the same or similar elements.

It should also be understood that the drawings are merely schematic and that the sizes and proportions of elements in the drawings are not necessarily precise.

Fig. 1 is a schematic structural view of a battery module according to an embodiment of the present application.

Fig. 2 is a schematic cross-sectional view of the battery module shown in fig. 1.

Fig. 3 is a partially enlarged view of an area a in fig. 2.

Fig. 4 is a schematic structural view of a top cover of a housing of the battery module shown in fig. 1.

Fig. 5 is a schematic structural view of a spacer of a case of the battery module shown in fig. 1.

Fig. 6 is a schematic structural view of a bottom case of a housing of the battery module shown in fig. 1.

Fig. 7 is a structural view illustrating a part of components of the battery module shown in fig. 1.

Detailed Description

The following description will exemplify the application embodiments with reference to the accompanying drawings. It should be appreciated that the implementations of the present application are numerous and should not be construed as limited to the embodiments set forth herein, which are presented merely to provide a more thorough and complete understanding of the present application.

Referring to fig. 1 to 3, a battery module 100 provided by an embodiment of the present disclosure includes a housing 11,12,13, a plurality of battery cells 20, and a fixing member 30. The plurality of battery cells 20 and the fixing grooves 30 are accommodated in the housings 11,12,13, that is, in the accommodating spaces defined by the housings 11,12, 13.

The fixing member 30 is disposed at one end of the plurality of battery cells 20, and a fixing groove 31 is provided at a side of the fixing member 30 facing the plurality of battery cells 20. One end of each of the battery cells 20 is inserted into the fixing groove 31.

The battery module 100 further includes a fastener 40. Fasteners 40 fasten the securing member 30 to the housings 11,12, 13.

Insert the one end of electric core and establish in the fixed slot of mounting to fasten the mounting in the shell through the fastener, make the fixed of electric core more firm, improved the barrier propterty of battery.

In some embodiments, referring again to fig. 1-3, the fastener 40 is a bolt 40. The housings 11,12,13 are provided with a first through hole 131. The fixing member 30 is provided with a screw hole 32 a.

The head of the bolt 40 is disposed outside the housings 11,12,13, and the shaft of the bolt 40 provided with the external thread is inserted through the first through hole 131 and into the screw hole 32a to be screwed with the internal thread in the screw hole 32a, thereby fastening the fixing member 30 to the housings 11,12, 13.

During assembly, the fixing piece can be fastened to the shell only by inserting the rod part of the bolt into the threaded hole of the fixing piece through the first through hole and screwing the bolt. When the fixing piece is disassembled, the fixing piece and the shell can be separated only by loosening the bolt from the outer side of the shell. This kind of realization easy dismounting can firmly fix the mounting on the shell.

It will be appreciated that whilst in this embodiment the housing is provided with a through hole and the fixing is provided with a threaded hole, in other embodiments the fixing may be provided with a through hole and the inner side of the housing (i.e. the side facing the fixing) may be provided with a threaded hole, the head of the bolt may be disposed in the fixing slot of the fixing and the shank of the bolt may pass through the through hole of the fixing and be screwed into the threaded hole of the housing.

It should also be understood that although in this embodiment the fasteners are bolts, in other embodiments the fasteners may be other types of fasteners, such as rivets.

In some embodiments, referring again to fig. 1 to 3, the battery module 100 further includes a cushion 50. The cushion 50 is disposed outside the housings 11,12,13 and wraps around the corners of the housings 11,12, 13.

The cushion 50 may be made of an elastic material, for example, rubber. The provision of the cushion pads 50 at the corners of the housings 11,12,13 can protect the battery module 100 better, absorb kinetic energy at the time of collision or impact, and reduce the possibility of damage to the battery module 100.

The cushion pad 50 is provided with second through holes 51a,51 b. The head of the bolt 40 is disposed outside the cushion 50, and the shaft of the bolt 40 passes through the second through-holes 51a,51b, thereby fastening the cushion 50 to the housings 11,12, 13.

Because the blotter is provided with the second perforating hole and the bolt passes the second perforating hole, consequently, only need a bolt just can fix the two of blotter and mounting on the shell to the overall structure of battery module has been simplified, battery module's manufacturing cost has been reduced. In addition, the cushion pad and the fixing piece can be assembled and disassembled only by screwing and loosening one bolt, so that the cushion pad and the fixing piece are easy to disassemble and assemble.

In some embodiments, referring to fig. 3, the outer side of the housing 11,12,13 is provided with a protrusion 132. The first through hole 131 penetrates the convex portion 132. Alternatively, the first through-hole 131 is provided in the convex portion 132. The convex portion 132 is inserted in the second through holes 51a,51b of the cushion pad 50.

During the assembly, can insert the second perforating hole of blotter with the convex part of shell earlier to align the first perforating hole of shell and the second perforating hole of blotter, then pass second perforating hole and first perforating hole with the pole portion of bolt, this kind of implementation makes the assembly more convenient. Further, the convex portion of the housing is inserted into the second through hole of the cushion pad, so that the cushion pad can be positioned more favorably, and the position of the cushion pad can be prevented from being displaced.

In some embodiments, referring again to fig. 3, the second through-holes 51a,51b of the cushion pad 50 have a small diameter section 51a and a large diameter section 51b in order from the inner side to the outer side of the cushion pad 50. That is, the small-diameter section 51a is closer to the fixing member 30 than the large-diameter section 51 b. The head of the bolt 40 is disposed in the large diameter section 51 b.

In this way, the head of the bolt can be embedded in the second through hole of the cushion pad, and the head of the bolt can be prevented from protruding out of the cushion pad.

In some embodiments, referring again to fig. 3, the battery module 100 further includes a gasket 41. The radial dimension of the washer 41 (i.e., the diameter of the outer periphery of the washer 41) is larger than the radial dimension of the small-diameter section 51a (i.e., the inner diameter of the small-diameter section 51 a). The shank of the bolt 40 passes through the washer 41 (i.e. through the washer's central aperture).

Considering that the shaft portion of the bolt is inserted into the first through-hole provided on the convex portion, and the convex portion is inserted into the small-diameter section of the second through-hole, the diameter of the shaft portion of the bolt is much smaller than the inner diameter of the small-diameter section of the second through-hole. Generally, the diameter of the head of the standard bolt is no much larger than the diameter of the shank. Therefore, if the standard bolt is used, the head of the bolt may be smaller than the inner diameter of the second through hole, so that the cushion pad cannot be fastened to the housing. Providing a washer in the large diameter section of the second through hole can solve this problem, so that the bolt can effectively fasten the cushion pad to the housing.

It will be appreciated that in other embodiments, the head diameter of the bolt may be set substantially larger than the shank diameter, thereby eliminating the need for a washer.

In some embodiments, referring again to fig. 3, a mount 30 has an insert nut 32 embedded therein. The shank of the bolt 40 is inserted into the threaded hole 32a of the insert nut 32 and is screwed with the internal thread of the threaded hole 32 a.

In order to reduce the overall weight of the battery module, the fixing member needs to be made of a lightweight material such as plastic, which reduces the strength of the fixing member. In view of this, if the screw hole is directly formed in the fixing member, the strength of the screw hole is poor, and the strength of the screw connection cannot be ensured. The insert nut is embedded in the fixing piece, so that the strength of threaded connection can be improved.

It should be understood that while in this embodiment the threaded bore is formed by embedding an insert nut in the fixture, in other embodiments the threaded bore may be formed directly in the fixture.

In some embodiments, the battery module may include a plurality of fastening members to more securely fix the fixing member. For example, the battery module may include four fasteners, which may fasten the buffer pads disposed at the four corners of the case to the case, respectively.

In some embodiments, referring to fig. 2, the fixing groove 31 is filled with a potting adhesive, and an end of each cell 20 is embedded in the potting adhesive in the fixing groove 31.

During assembly, the ends of the plurality of battery cells 20 may be inserted into the fixing grooves 31 of the fixing member 30, and then the potting adhesive may be poured into the fixing grooves 31, so that the ends of the plurality of battery cells 20 are embedded in the potting adhesive.

Insert the tip of a plurality of electric cores in the fixed slot of mounting and bury underground in the casting glue, can fix a plurality of electric cores better, prevent to strike outside under the effect of vibrations, take place the friction between the adjacent electric core and between electric core and other structures. If frequent friction between adjacent electric cores or between electric core and other structures can lead to the damage of electric core shell, and then cause the burning of electric core and even explosion.

In some embodiments, referring to fig. 1-6, housings 11,12,13 include a top cover 11, a spacer 12, and a bottom shell 13. The spacer 12 is disposed between the top cover 11 and the bottom cover 13. Spacer 12 cooperates with bottom housing 13 to form (or enclose) a first receptacle 14. The spacer 12 cooperates with the lid 11 to form (or enclose) a second receptacle 15.

A plurality of cells 20 and fasteners 30 are received in first cavity 14. The fastener 40 fastens the fixing member 30 to the bottom case 13. The battery module 100 further includes a control circuit board 60. The control circuit board 60 is configured to control charging and discharging of the multiple battery cells 20, so as to implement charging and discharging control of the multiple battery cells 20. The control circuit board 60 is received in the second receiving cavity 15.

The control circuit board and the battery cell are respectively accommodated in the two separated accommodating cavities, so that the mutual influence of the control circuit board and the battery cell can be avoided, for example, the mutual collision of the control circuit board and the battery cell can be avoided, and the mutual influence of heat generated by the control circuit board and the battery cell can be avoided.

In some embodiments, referring to fig. 1 and 2, the outer side of the top cover 11 is provided with a heat radiating fin group composed of a plurality of heat radiating fins 111. The control circuit board 60 is located inside the top cover 11, and the control circuit board 60 is closely attached to the inner side surface of the top cover 11.

It should be understood that the inner side of the top cover 11 refers to the side thereof facing the second cavity 15, and correspondingly, the outer side of the top cover 11 refers to the side thereof facing the external environment.

As one implementation, the group of heat dissipating fins may be formed on the outside of the top cover 11. In other words, the group of heat dissipation fins may be a part of the top cover 11, integrally formed with the top cover 11.

As another implementation, the heat dissipation fin group may be a separate member from the top cover 11, and is mounted on the top cover 11 and closely attached to the outer side surface of the top cover 11.

Because the control circuit board is tightly attached to the inner side of the top cover and the outer side of the top cover is provided with the radiating fin group, heat generated by the control circuit board can be conducted to the radiating fin group through the top cover and taken away by the radiating fin group. With the adoption of the method, the efficient heat dissipation of the control circuit board can be realized, and the safety performance of the battery module is improved.

In some embodiments, referring again to fig. 1 and 2, the control circuit board 60 may be located opposite the group of heat dissipating fins. In other words, part or all of the orthographic projection of the group of heat dissipating fins on the inner side surface of the top cover 11 overlaps with the orthographic projection of the control circuit board 60 on the inner side surface of the top cover 11.

The control circuit board is arranged at a position opposite to the radiating fin group, so that the conduction distance of heat from the control circuit board to the radiating fin group is reduced, and the radiating efficiency is improved.

In some embodiments, referring to fig. 2 and 4, the inner side of the top cover 11 is provided with a receiving groove 112, and the control circuit board 60 is received in the receiving groove 112. The housing groove 112 is filled with a potting adhesive, and the control circuit board 60 is embedded in the potting adhesive in the housing groove 112.

When assembling the control circuit board 60, the control circuit board 60 may be first installed in the receiving groove 112, and then the uncured potting adhesive is poured into the receiving groove 112, so as to embed the control circuit board 60 in the potting adhesive.

In this way, the control circuit board can be better fixed on the top cover, so that the resistance to external impact and vibration is improved. In addition, the control circuit board is embedded in the pouring sealant, so that the direct exposure of circuits and elements on the control circuit board can be avoided, and the waterproof and moisture-proof performances of the control circuit board are improved. In addition, the pouring sealant has better heat conductivity, so the realization mode can improve the heat dissipation of the control circuit board.

The embodiment of the present application is not particularly limited to the type of the potting adhesive. For example, in some embodiments, the potting adhesive may be an epoxy potting adhesive. As another example, in some embodiments, the potting adhesive may be a silicone resin potting adhesive. As another example, in some embodiments, the potting adhesive may be a polyurethane potting adhesive.

In some embodiments, referring to fig. 2 and 4, the inside of the top cover 11 is provided with two raised edges 113,114 protruding from the inside surface. The two rims 113,114 are spaced apart and define a mounting area with a pair of opposing rims 115,116 of the pocket 112. The control circuit board 60 may be disposed within the mounting area, thereby enabling better positioning and securing of the control circuit board 60.

In some embodiments, the potting adhesive may be poured only in the mounting area, thereby reducing the amount of potting adhesive required to embed the control circuit board 60.

In some embodiments, referring to fig. 2 and 7, the battery module 100 further includes a connection circuit board 70. The connection circuit board 70 is disposed in the first receiving cavity 14 and is disposed on one end side of the plurality of battery cells 20 away from the fixing member 30. The tab 21 of each cell 20 is disposed at an end remote from the fixing member 30. The connection circuit board 70 is used for electrically connecting the tabs 21 of the plurality of battery cells 20 with the control circuit board 60.

The battery module 100 further includes a mounting member 80 received in the second receiving cavity 14. The mounting member 80 is located at an end of the plurality of battery cells 20 away from the fixing member 30. The mounting member 80 is provided with a mounting groove 81. The connection circuit board 70 is received in the mounting groove 81. The tabs 21 of the plurality of battery cells 20 extend into the mounting groove 81 and are electrically connected to the connection circuit board 70.

Pouring sealant is poured into the mounting groove 81. The tab 21 connecting the circuit board 70 and the plurality of cells 20 is embedded in the potting adhesive in the mounting groove 81.

During assembly, the connection circuit board 70 connected to the tabs 21 of the plurality of battery cells 20 may be first installed in the installation groove 81, and then the potting adhesive is poured into the installation groove 81, so that the connection circuit board 70 and the tabs 21 of the plurality of battery cells 20 are embedded in the potting adhesive.

By the mode, the circuit board and the lugs can be fixedly connected better, and the short circuit caused by the contact of the adjacent lugs can be prevented. In addition, the connecting circuit board and the lugs are embedded in the pouring sealant, so that the connecting circuit board and the lugs can be prevented from being directly exposed, and the waterproof performance and the moisture-proof performance of the connecting circuit board and the lugs are improved.

In some embodiments, referring again to fig. 2 and 7, the mounting member 80 may be further provided with a threading hole through which a connection line between the connection circuit board 70 and the control circuit board 60 passes.

In some embodiments, referring to fig. 7, the battery module 100 further includes a plurality of protective plates 91,92,93, and 94 received in the first cavity 14, wherein the plurality of protective plates 91,92,93, and 94 surround the periphery of the core assembly formed by the plurality of battery cells 20 to better protect the plurality of battery cells 20.

In some embodiments, the plurality of cover sheets 91,92,93,94 may be plastic or aluminum alloy sheets to ensure that the plurality of cover sheets 91,92,93,94 have a light weight with sufficient strength.

In some embodiments, referring to fig. 2, the plurality of battery cells 20 are arranged to be spaced apart from each other to form heat dissipation voids 20a between the adjacent battery cells 20, thereby improving the heat dissipation effect of the plurality of battery cells 20.

As an implementation manner, foam 20a may be disposed between adjacent battery cells 20, so as to space adjacent battery cells 20 and achieve an effect of absorbing impact and shock.

In some embodiments, referring again to fig. 2 and 7, the cells 20 may be sheet cells. A plurality of sheet-shaped battery cells 20 are stacked, and heat dissipation gaps 20a are formed between adjacent battery cells 20. Among the plurality of covers 91,92,93,94, the covers 91,93 facing the heat dissipation gaps 20a between the plurality of battery cells 20 are provided with a plurality of heat dissipation holes 95. The plurality of heat dissipation holes 95 are respectively aligned with the heat dissipation gaps 20a between the plurality of battery cells 20, so that the heat dissipation effect of the plurality of battery cells 20 is further improved.

In some embodiments, referring to fig. 1 and 6, the bottom case 13 is provided with a plurality of through holes 133 for allowing a fluid medium (e.g., water) to flow into and out of the first cavity 14, so as to control the temperature of the battery cell, for example, to cool the battery cell.

In some embodiments, referring to fig. 2, 5, and 6, spacer 12 may include a substrate 121 and a bezel 122 extending from substrate 121 toward bottom case 13. The bottom case 13 is provided with a receiving groove 13a having an open top end. The frame 122 of the spacer 12 is inserted into the opening of the receiving groove 13a, thereby enclosing the receiving groove 13a as the first receiving cavity 14.

In some embodiments, referring to fig. 2 and 5, the base plate 121 of the spacer 12 is provided with a wire through hole 123 communicating the first receiving cavity 14 and the second receiving cavity 15, and the connection wire between the connection circuit board 70 and the control circuit board 60 passes through the wire through hole 123.

The embodiment of the application also provides an unmanned aerial vehicle. The unmanned aerial vehicle can include any one of the battery modules in the above embodiments.

It is to be understood that, as used herein, the terms "includes," including, "and variations thereof are intended to be open-ended, i.e.," including, but not limited to. The term "one embodiment" means "at least one embodiment"; the term "another embodiment" means "at least one additional embodiment".

It will be understood that, although the terms first, second, etc. may be used herein to describe various elements (e.g., first through via and second through via), these elements are not limited by these terms, which are only used to distinguish one element from another.

It should be understood that in the embodiments of the present application, the terms "connected," "fixed," and the like are to be construed broadly unless otherwise specifically indicated and limited. For example, "fixed" may refer to a fixed connection, may refer to a detachable connection, and may refer to an integrally formed connection. "coupled" may mean mechanically coupled, electrically coupled, directly coupled, indirectly coupled through an intermediary, coupled between two elements, or coupled between two elements. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art as appropriate.

It should be noted that the various technical features described in the above embodiments can be combined in any suitable manner without contradiction, and in order to avoid unnecessary repetition, various possible combinations of the features are not described separately.

The above description is only for the specific embodiments of the present application, but the scope of the present application is not limited thereto, and any person skilled in the art can conceive of changes or substitutions within the technical scope of the present application, and shall be covered by the scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.

Claims (10)

1. A battery module, comprising:

a plurality of cells;

a fixing member provided with a fixing groove in which an end portion of each of the plurality of battery cells is inserted;

a housing in which the plurality of cells and the fixture are housed; and

a fastener fastening the fixture to the housing.

2. The battery module according to claim 1, wherein the fastening member is a bolt, the housing is provided with a first through hole, and the fixing member is provided with a screw hole, wherein a head portion of the bolt is disposed outside the housing, and a shaft portion of the bolt passes through the first through hole and is screwed with the screw hole, thereby fastening the fixing member to the housing.

3. The battery module according to claim 2, further comprising a buffer pad disposed at an outer side of the housing and wrapping corners of the housing, the buffer pad being provided with a second through-hole, wherein a head of the bolt is disposed at an outer side of the buffer pad and a shaft of the bolt passes through the second through-hole, thereby fastening the buffer pad to the housing.

4. The battery module according to claim 3, wherein a convex portion is provided on an outer side surface of the housing, the first through-hole penetrates the convex portion, and the convex portion is inserted into the second through-hole.

5. The battery module according to claim 4, wherein the second through-hole has a small-diameter section and a large-diameter section in order from the inside of the cushion pad to the outside of the cushion pad, wherein the head of the bolt is seated in the large-diameter section.

6. The battery module according to claim 5, further comprising a washer having a radial dimension greater than that of the small-diameter section, the shaft of the bolt passing through the washer.

7. The battery module according to claim 2, wherein an insert nut is embedded in the fixing member, and the threaded hole is a threaded hole of the insert nut.

8. The battery module according to any one of claims 1 to 7, wherein the fixing groove is filled with a potting adhesive, and the end of each of the plurality of cells is embedded in the potting adhesive in the fixing groove.

9. The battery module according to any one of claims 1 to 7, wherein the housing comprises a bottom shell, a spacer and a top cover, the spacer is disposed between the top cover and the bottom shell, and the spacer cooperates with the bottom shell and the top cover to form a first cavity and a second cavity, respectively, wherein

The plurality of battery cores and the fixing piece are accommodated in the first accommodating cavity, and the fixing piece is fastened on the bottom shell by the fastening piece; the battery module further comprises a control circuit board, the control circuit board is used for controlling the charging and discharging of the plurality of battery cores, and the control circuit board is accommodated in the second accommodating cavity.

10. An unmanned aerial vehicle, comprising the battery module according to any one of claims 1 to 9.

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