CN219832852U - Battery module and electronic device - Google Patents

Abstract

The application discloses a battery module and an electronic device. The battery cell assembly comprises a plurality of battery cells, the battery cells are arranged along a first direction, and a gap is arranged between two adjacent battery cells. Along the second direction perpendicular to the first direction, the bracket is arranged on one side of the battery cell assembly and is connected with the battery cell. Along a second direction, the bottom plate is arranged on one side of the battery cell component, which is away from the bracket, and is connected with the battery cell; the bottom plate is provided with a first opening, and the first opening and the gap are mutually communicated when being observed along the second direction. The first opening and the gap are communicated with each other, so that foreign matters in the gap can be discharged through the first opening, the first opening and the gap are aligned, the risk that the foreign matters pass through the first opening and collide with the battery cell can be reduced, and the reliability of the battery module can be improved.

Description

Battery module and electronic device

Technical Field

The present disclosure relates to energy storage technologies, and particularly to a battery module and an electronic device.

Background

When the battery module of the electronic device is used under the working conditions of high multiplying power, no standing, continuous charge and discharge and the like, the phenomenon of overhigh temperature of the battery cell exists. In order to enable the battery module to continuously charge and discharge and improve the reliability of the battery module, it is necessary to improve the heat dissipation effect of the battery module and reduce the temperature of the battery cell in the use process.

At present, in the related art, a battery module is provided with an air duct to perform air cooling and heat dissipation on a battery cell, however, the air cooling and heat dissipation manner is easy to enable foreign matters to enter the battery module, and the reliability of the battery module is reduced due to the accumulation of the foreign matters in the battery module.

Disclosure of Invention

In view of the above, the present utility model provides a battery module that facilitates the discharge of foreign materials.

Some embodiments of the present utility model provide a battery module including a battery cell assembly, a bracket, and a bottom plate. The battery cell assembly comprises a plurality of battery cells, the battery cells are arranged along a first direction, and a gap is arranged between two adjacent battery cells. Along the second direction perpendicular to the first direction, the bracket is arranged on one side of the battery cell assembly and is connected with the battery cell. Along the second direction, the bottom plate is arranged on one side of the battery cell component, which is away from the bracket, and is connected with the battery cell. The bottom plate is provided with a first opening, and the first opening and the gap are mutually communicated when being observed along the second direction.

In the above embodiment, the first opening and the gap are mutually communicated along the second direction, so that the first opening and the gap are aligned, the foreign matters in the gap are discharged through the first opening, and the first opening and the gap are aligned, so that the risk that the foreign matters outside the gap collide with the battery cell through the first opening is reduced, and the reliability of the battery module is improved.

In some embodiments, the first opening extends along a third direction that is perpendicular to the first direction and the second direction.

In the above embodiment, the first opening extends in the third direction, which is advantageous for enlarging the first opening and further facilitating the discharge of foreign matters from the gap through the first opening.

In some embodiments, the number of first openings is a plurality, the plurality of first openings being disposed along the first direction. The number of gaps is a plurality of, and every two adjacent electric cores all have the gap between, and a plurality of gaps set up along first direction. Wherein, each first opening is arranged corresponding to each gap.

In the above embodiment, each first opening is disposed corresponding to each gap, so that foreign matters carried in each gap by airflow can be discharged through the corresponding first opening, and reliability of the battery module is further improved.

In some embodiments, the base plate comprises a first side wall and a second side wall, the first side wall and the second side wall being disposed opposite one another along a third direction, the third direction being perpendicular to the first direction and the second direction. A partition is arranged on the first side wall; and/or a spacer is provided on the second sidewall. Wherein the separator is located between two adjacent cells.

In the above embodiment, the separator is used to contact with two adjacent cells, which is beneficial to limiting the relative movement between the two adjacent cells, and thus is beneficial to inhibiting the change of the size of the gap.

In some embodiments, the separator includes a first elastic arm and a second elastic arm, the first elastic arm and the second elastic arm are disposed along a first direction, the first elastic arm abuts against one of the two adjacent cells, and the second elastic arm abuts against the other cell.

In the above embodiment, the first elastic arm and the second elastic arm can be deformed under stress, which is favorable for absorbing assembly errors and dimension errors generated when the bottom plate is connected with the plurality of electric cores, and improves assembly efficiency. And when the battery module is impacted, the first elastic arm and the second elastic arm play a role in buffering the plurality of battery cells, so that rigid impact between the plurality of battery cells and the bottom plate is reduced, and the battery cells are protected.

In some embodiments, the bracket includes a protrusion extending in a direction opposite the second direction. The convex part is positioned between two adjacent electric cores and is connected with the electric cores.

In the above embodiment, the protruding portion is used for contacting with the battery cells, so that the relative movement between two adjacent battery cells is limited, and further, the change of the size of the gap is restrained.

In some embodiments, the cell is a square-case cell comprising a housing, an electrode assembly, and an electrode terminal. The electrode assembly is arranged in the shell, the electrode terminal is connected with the electrode assembly, and at least part of the electrode terminal is exposed out of the shell.

In the above embodiment, the square-shell battery cell is advantageously fixedly connected to the bracket and the bottom plate.

In some embodiments, the plurality of protrusions are arranged along the first direction, the bracket is provided with a plurality of second openings, the plurality of second openings are arranged along the first direction, and each protrusion is positioned between two adjacent second openings. The battery module further comprises an electric connecting piece, wherein the electrode terminals of the two adjacent battery cells are connected with the electric connecting piece.

In the above embodiment, the convex portions are disposed between any two battery cells, which is beneficial to inhibiting the change of the size of each gap. The electrical connector facilitates connection of the electrode terminals to other conductive structures.

In some embodiments, the battery module further includes a circuit board and a conductive member disposed on a side of the bracket facing away from the battery cell assembly in the second direction. The electric connecting piece is connected with the conductive piece, and the conductive piece is connected with the circuit board.

In the above embodiment, the circuit board and the conductive member are disposed on a side of the support away from the battery cell assembly, which is favorable for reducing the distance between the conductive member and the electrode terminal and for electrically connecting the conductive member and the circuit board with the battery cell. The conductive member facilitates electrically connecting the overall positive and overall negative poles of the cell assembly with the circuit board.

In some embodiments, the battery module further comprises a top cover, the top cover is arranged on one side of the support, which faces away from the battery cell assembly, along the second direction, the top cover is provided with a first cavity, and the circuit board is arranged in the first cavity. Wherein, top cap and support sealing connection.

In the above embodiment, the top cover is beneficial to protecting the circuit board, the conductive member, the electrical connector and the electrode terminal, and is beneficial to reducing impact and corrosion of foreign matters and water vapor to the circuit board, the conductive member, the electrical connector and the electrode terminal.

In some embodiments, the side of the top cover facing the support is provided with an annular groove, the support is provided with an annular protrusion, the annular protrusion extends in the second direction, and the annular protrusion protrudes into the annular groove. Wherein, be equipped with the sealing member in the ring channel, the sealing member meets with annular bulge and top cap.

In the above embodiment, the cooperation of the annular groove and the annular protrusion is beneficial to improving the stability and the tightness of the connection between the top cover and the bracket, and the sealing element is beneficial to improving the tightness between the top cover and the bracket.

In some embodiments, the top cover is further provided with a second cavity communicated with the first cavity, the battery module further comprises a connector, the connector is connected with the top cover, at least part of the connector is located in the second cavity and connected with the circuit board, and at least part of the connector is exposed from the second cavity for connection with an external circuit.

In the above embodiment, the connector is beneficial to connecting the circuit board with an external circuit, and the second cavity is beneficial to protecting the connector and the circuit board connected with the connector by the top cover.

In some embodiments, the battery module further includes a first side plate and a second side plate, wherein the first side plate is disposed on one side of the battery cell assembly along the first direction, and the second side plate is disposed on one side of the battery cell assembly away from the first side plate. Wherein, first curb plate and second curb plate all are connected with electric core subassembly and bottom plate.

In the above embodiment, the first side plate and the second side plate are beneficial to improving the connection stability of the battery cell assembly and the bottom plate, and are also beneficial to protecting the two opposite sides of the electrode assembly in the first direction.

In some embodiments, the first side plate is provided with fins and/or the second side plate is provided with fins.

In the above embodiments, the fin is beneficial to strengthening the structural strength of the first side plate and/or the second side plate, and improving the protection effect of the first side plate and/or the second side plate on the electrode assembly. The fins are further beneficial to improving the heat exchange area of the first side plate and/or the second side plate, improving the heat dissipation effect of the first side plate and/or the second side plate and further improving the heat dissipation performance of the battery module.

In addition, some embodiments of the present application further provide an electronic device that is beneficial to improving reliability.

Some embodiments of the present application further provide an electronic device, which includes a device body and the battery module according to any of the above embodiments, wherein the battery module is mounted on the device body.

In the above embodiment, the foreign matters of the battery module in the air cooling process are easily discharged, so that the reliability of the battery module is improved, and the reliability of the electronic device with the battery module is further improved.

The battery module comprises a battery cell assembly, a bracket and a bottom plate. The battery cell assembly comprises a plurality of battery cells, the battery cells are arranged along a first direction, and a gap is arranged between two adjacent battery cells. Along the second direction perpendicular to the first direction, the bracket is arranged on one side of the battery cell assembly and is connected with the battery cell. Along the second direction, the bottom plate is arranged on one side of the battery cell component, which is away from the bracket, and is connected with the battery cell. Wherein, the bottom plate is equipped with first opening, observes along the second direction, and first opening and clearance intercommunication each other are favorable to letting first opening and clearance aim at, are favorable to letting the foreign matter in the clearance discharge through first opening, and first opening and clearance aim at and be favorable to reducing the outside foreign matter of clearance and pass first opening and electric core collision's risk to be favorable to promoting battery module's reliability.

Drawings

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

Fig. 2 is a schematic diagram of a battery according to an embodiment of the application.

Fig. 3 is a schematic view of the installation of the battery of fig. 2.

Fig. 4 is a partial enlarged view of a portion a in fig. 3.

Fig. 5 is a side view of a battery module according to an embodiment of the present application.

Fig. 6 is a sectional view of a battery module according to an embodiment of the present application.

Fig. 7 is a schematic structural diagram of a base plate according to an embodiment of the present application.

Fig. 8 is a partial enlarged view of a portion D in fig. 7.

Fig. 9 is a schematic structural diagram of a bracket according to an embodiment of the present application.

Fig. 10 is a partial enlarged view of the portion B in fig. 6.

Fig. 11 is a schematic structural view of a battery module according to an embodiment of the present application.

Fig. 12 is an installation schematic diagram of a battery module according to an embodiment of the application.

Fig. 13 is a schematic structural diagram of a top cover and a circuit board according to an embodiment of the application.

Fig. 14 is a partial enlarged view of a portion C in fig. 6.

Fig. 15 is a schematic diagram of an electronic device according to an embodiment of the application.

Description of the main reference signs

Battery module 100

Cell assembly 10

Cell 11

Housing 111

First wall 1111

Second wall 1112

Third wall 1113

Fourth wall 1114

Fifth wall 1115

Sixth wall 1116

Electrode assembly 112

Positive electrode sheet 1121

Negative electrode sheet 1122

Isolation film 1123

Electrode terminal 113

Gap 11a

Bracket 20

Convex portion 21

Second opening 22

Plate body 23

Annular recess 231

Annular projection 24

Bottom plate 30

First opening 31

First side wall 32

Second side wall 33

Separator 34

First elastic arm 341

Second elastic arm 342

Bottom wall 35

Stripe groove 351

Electrical connector 40

Adapter plate 40a

Circuit board 50

Conductive member 60

Top cover 70

First cavity 71

Annular groove 72

Second cavity 73

Seal 80

Connector 90

First side plate 101

Second side plate 102

Fins 103

Device body 200

Electronic device 1000

First direction X

Second direction Y

Third direction Z

Detailed Description

The following description of the technical solutions according to the embodiments of the present application will be given with reference to the accompanying drawings in the embodiments of the present application, and it is apparent that the described embodiments are only some embodiments of the present application, but not all embodiments.

When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present unless expressly stated or defined otherwise. When an element is referred to as being "disposed" on another element, it can be directly on the other element or intervening elements may also be present. The terms "top," "bottom," "upper," "lower," and the like are used herein for illustrative purposes only.

The terms "coupled" and "connected" are to be interpreted broadly, and may be, for example, fixedly coupled, detachably coupled, or integrally connected; either mechanically or electrically. The electrical connection between the two members may be by direct contact or by fixation by welding or the like.

The term "vertical" is used to describe an ideal state between two components. In the actual production or use state, there may be an approximately vertical state between the two components. For example, in conjunction with the numerical description, perpendicular may refer to an angle between two straight lines ranging between 90++10°, perpendicular may also refer to a dihedral angle between two planes ranging between 90++10°, and perpendicular may also refer to an angle between a straight line and a plane ranging between 90++10°. The two components described as "perpendicular" may be considered "straight" or "planar" as they are considered "straight" or "planar" in that they are not strictly straight or planar, but may be substantially straight or planar in that they extend in a macroscopic manner.

The term "parallel" is used to describe an ideal state between two components. In an actual production or use state, there may be a state of approximately parallelism between the two components. For example, in connection with numerical descriptions, parallel may refer to an angle between two straight lines ranging between 180++10°, parallel may refer to a dihedral angle between two planes ranging between 180++10°, and parallel may refer to an angle between a straight line and a plane ranging between 180++10°. The two components described as "parallel" may be considered "straight" or "planar" as they are considered "straight" or "planar" in that they are not strictly straight or planar, but may be substantially straight or planar in that they extend in a macroscopic manner.

It should be noted that when a certain parameter is greater than, equal to, or less than a certain endpoint, it should be understood that the endpoint allows a tolerance of ±5%.

The term "plurality" as used herein refers to two or more than two, unless specifically stated otherwise.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used herein in the description of the application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application.

The application discloses a battery module which comprises a battery cell assembly, a bracket and a bottom plate. The battery cell assembly comprises a plurality of battery cells, the battery cells are arranged along a first direction, and a gap is arranged between two adjacent battery cells. Along the second direction perpendicular to the first direction, the bracket is arranged on one side of the battery cell assembly and is connected with the battery cell. Along the second direction, the bottom plate is arranged on one side of the battery cell component, which is away from the bracket, and is connected with the battery cell. The bottom plate is provided with a first opening, and the first opening and the gap are mutually communicated when being observed along the second direction.

The first opening and the gap are communicated with each other along the second direction, so that the first opening and the gap are aligned, foreign matters in the gap are discharged through the first opening, and the first opening and the gap are aligned to reduce the risk that foreign matters outside the gap collide with the battery cell through the first opening, thereby improving the reliability of the battery module.

Some embodiments of the present application will be described below with reference to the accompanying drawings. The embodiments described below and features of the embodiments may be combined with each other without conflict.

Referring to fig. 1, an embodiment of the application provides a battery module 100, and the battery module 100 includes a battery cell assembly 10, a bracket 20 and a bottom plate 30. The battery cell assembly 10 comprises a plurality of battery cells 11, the battery cells 11 are arranged along a first direction X, the bracket 20 is arranged on one side of the battery cell assembly 10 along a second direction Y perpendicular to the first direction X and is connected with the battery cells 11, and the bottom plate 30 is arranged on one side of the battery cell assembly 10 away from the bracket 20 along the second direction Y and is connected with the battery cells 11.

In some embodiments, referring to fig. 2 and 3, the battery cell 11 includes a case 111, an electrode assembly 112, and an electrode terminal 113. The electrode assembly 112 is disposed in the case 111, the electrode terminal 113 is connected to the electrode assembly 112, and at least a portion of the electrode terminal 113 is exposed to the case 111.

In some embodiments, referring to fig. 2 and 3, the battery cell 11 is a square-case battery cell 11, and the case 111 includes a first wall 1111, a second wall 1112, a third wall 1113, a fourth wall 1114, a fifth wall 1115, and a sixth wall 1116. The first wall 1111 and the third wall 1113 are disposed opposite to each other along the second direction Y, the second wall 1112 and the fourth wall 1114 are disposed opposite to each other along a third direction Z perpendicular to the first direction X, and the fifth wall 1115 and the sixth wall 1116 are disposed opposite to each other along the first direction X, wherein the third direction Z is perpendicular to the first direction X and the second direction Y.

In some embodiments, referring to fig. 2 and 3, the area of the fifth wall 1115 is larger than the area of any of the first wall 1111, the second wall 1112, the third wall 1113, and the fourth wall 1114, the area of the sixth wall 1116 is larger than the area of any of the first wall 1111, the second wall 1112, the third wall 1113, and the fourth wall 1114, and the fifth wall 1115 and the sixth wall 1116 are large faces of the cell 11.

In some embodiments, referring to fig. 2 and 3, the fifth wall 1115 is disposed parallel to the sixth wall 1116, and the area of the fifth wall 1115 is equal to the area of the sixth wall 1116.

In some embodiments, referring to fig. 2 and 3, the first wall 1111, the second wall 1112, the third wall 1113, the fourth wall 1114, the fifth wall 1115 and the sixth wall 1116 are sequentially connected and enclose a space for accommodating the electrode assembly 112, and the connection manner of the first wall 1111, the second wall 1112, the third wall 1113, the fourth wall 1114, the fifth wall 1115 and the sixth wall 1116 may be welding, bonding, clamping connection or a part thereof is integrally formed, which is not limited herein.

In some embodiments, the first wall 1111, the second wall 1112, the third wall 1113, the fourth wall 1114, the fifth wall 1115, and the sixth wall 1116 are all rigid shells 111, and may be made of materials such as plastics, metals, and the like.

In some embodiments, the materials of the first wall 1111, the second wall 1112, the third wall 1113, the fourth wall 1114, the fifth wall 1115, and the sixth wall 1116 may be the same or different.

In some embodiments, referring to fig. 2 to 4, the electrode assembly 112 includes a positive electrode tab 1121, a negative electrode tab 1122, and a separator 1123. A separator 1123 is provided between the positive electrode tab 1121 and the negative electrode tab 1122. The positive electrode tab 1121, the separator 1123, and the negative electrode tab 1122 are stacked in this order or stacked in this order and wound, and are not particularly limited herein.

In some embodiments, positive electrode tab 1121 is prepared with a positive electrode active material disposed on a metal layer, and negative electrode tab 1122 is prepared with a negative electrode active material disposed on a metal layer. For example, the positive electrode tab 1121 employs an aluminum metal layer, and the positive electrode active material includes one or more of nickel cobalt lithium manganate, lithium cobaltate, lithium iron phosphate, lithium manganate, lithium manganese iron phosphate, cobalt-free material, and sodium ion material; the negative electrode sheet 1122 adopts a copper metal layer, and the negative electrode active material comprises one or more of artificial graphite, natural graphite and silicon material.

In some embodiments, the separator 1123 may be a film material such as a polyethylene film, a polypropylene film, a polyester film, or a polyimide film, which can be insulating, to serve as a separator for the positive electrode tab 1121 and the negative electrode tab 1122.

In some embodiments, the electrode terminal 113 has a positive electrode terminal 113 and a negative electrode terminal 113, the positive electrode terminal 113 is connected to the positive electrode tab 1121, and the positive electrode terminal 113 is made of the same material as the positive electrode tab 1121. The negative electrode terminal 113 is connected to the negative electrode tab 1122, and the material of the negative electrode terminal 113 is the same as that of the negative electrode tab 1122.

In some embodiments, referring to fig. 2 to 4, the first wall 1111 of each cell 11 is exposed with two electrode terminals 113, and the polarities of the two electrode terminals 113 are opposite.

In other embodiments, the first wall 1111 of each cell 11 may also expose more than two electrode terminals 113, which is not specifically limited herein.

Referring to fig. 5, a gap 11a is provided between two adjacent cells 11 along the first direction X, and the gap 11a is configured to allow air to circulate, thereby forming an air duct. The air flow flowing through the gap 11a can take away the heat of the two adjacent electric cells 11, so that the two adjacent electric cells 11 are subjected to air cooling.

In some embodiments, referring to fig. 3 and 5, the second wall 1112 and the fourth wall 1114 of two adjacent cells 11 are exposed to the external environment, which is beneficial to letting the air flow in the environment take away the heat of the second wall 1112 and the fourth wall 1114, and also beneficial to letting the air flow in the environment enter the gap 11a to take away the heat of the fifth wall 1115 and the sixth wall 1116, so as to improve the heat dissipation effect of the battery module 100.

In some embodiments, referring to fig. 3 and 5, the fifth wall 1115 and the sixth wall 1116 are large surfaces of the battery cell 11, which is further beneficial to increasing the contact area between the battery cell 11 and the air, thereby improving the heat dissipation performance of the battery module 100.

In some embodiments, referring to fig. 5, a gap 11a is provided between any two adjacent battery cells 11, which is beneficial to improving the contact area between the whole battery cells 11 and air, so as to improve the heat dissipation performance of the battery module 100.

Referring to fig. 5 and 6, the base plate 30 is connected to the plurality of battery cells 11, so as to limit movement between the plurality of battery cells 11. When the battery module 100 is installed, the bottom plate 30 may be placed on a load-bearing structure or the ground, which is advantageous for supporting the plurality of battery cells 11.

In some embodiments, the base plate 30 and the battery cell 11 may be connected by an adhesive connection or a welded connection.

In some embodiments, referring to fig. 3 and 6, the first wall 1111 of each cell 11 is exposed with two electrode terminals 113, and the distance between the bottom plate 30 and the third wall 1113 is smaller than the distance between the bottom plate 30 and the first wall 1111 along the second direction Y, so that the distance between the portion of the cell 11 where the electrode terminal 113 is disposed and the bottom plate 30 is advantageously increased, and the risk that the electrode terminal 113 contacts with external foreign matters is reduced.

In some embodiments, referring to fig. 6 and 7, the bottom plate 30 is provided with a first opening 31, and the first opening 31 communicates with the gap 11a when viewed along the second direction Y, so as to facilitate aligning the first opening 31 with the gap 11a and facilitate discharging the foreign matters in the gap 11a through the first opening 31. The alignment of the first opening 31 and the gap 11a is also advantageous in reducing the risk of foreign matters outside the gap 11a colliding with the battery cell 11 after passing through the first opening 31, thereby improving the reliability of the battery module 100.

In some embodiments, referring to fig. 7, the first opening 31 extends along the third direction Z, which is advantageous for enlarging the first opening 31 and further facilitating the discharge of the foreign matter from the gap 11a through the first opening 31.

In some embodiments, referring to fig. 6 and 7, in the first direction X, the width of the first opening 31 is smaller than or equal to the width of the gap 11a, which is advantageous for the bottom plate 30 to cover the third wall 1113 of the cell 11, and for the bottom plate 30 to protect the cell 11.

In some embodiments, referring to fig. 6 and 7, the number of the first openings 31 is plural, and the plural first openings 31 are disposed along the first direction X. The number of the gaps 11a is plural, and each two adjacent cells 11 have a gap 11a therebetween, and the plural gaps 11a are arranged along the first direction X. Wherein each first opening 31 is provided corresponding to each gap 11 a. Each first opening 31 is disposed corresponding to each gap 11a, which is beneficial to discharging the foreign matters carried in each gap 11a by the airflow through the corresponding first opening 31, thereby further improving the reliability of the battery module 100.

In some embodiments, referring to fig. 7, the number of gaps 11a is plural, and each two adjacent cells 11 have a gap 11a therebetween, and the gaps 11a are disposed along the first direction X. The number of the first openings 31 is plural, and each gap 11a corresponds to the plural first openings 31 arranged along the third direction Z.

It can be understood that the plurality of first openings 31 corresponding to the one gap 11a are arranged at intervals along the third direction Z, so that a separation structure exists between any two adjacent first openings 31 along the third direction Z, which is favorable for improving the overall structural strength of the bottom plate 30, and further improving the effect of the bottom plate 30 in limiting the movement of the plurality of battery cells 11 and the effect of bearing the plurality of battery cells 11. The plurality of first openings 31 corresponding to the gap 11a are arranged at intervals along the third direction Z, so that the first opening 31 corresponding to the gap 11a is not too long along the third direction Z, and the risk that too large foreign matters pass through the first opening 31 outside the gap 11a and enter the gap 11a is reduced.

It should be noted that, when the battery module 100 is placed or installed, the bottom plate 30 is placed on the carrying structure or the ground, if there are larger protrusions or foreign matters on the carrying structure or the ground, the separation structure between the plurality of first openings 31 can play a role of blocking, which is beneficial to reducing the risk that the larger protrusions or foreign matters enter the gap 11a, thereby improving the reliability of the battery module 100.

In some embodiments, referring to fig. 7, the bottom plate 30 includes a first sidewall 32 and a second sidewall 33, and the first sidewall 32 and the second sidewall 33 are disposed opposite to each other along the third direction Z.

The first side wall 32 is provided with a separator 34, and the separator 34 is located between two adjacent battery cells 11. The spacer 34 is used to contact the adjacent two cells 11, which is advantageous to limit the relative movement between the adjacent two cells 11, and thus to suppress the change in the size of the gap 11 a.

In some embodiments, referring to fig. 7, a spacer 34 is disposed on the second sidewall 33. Wherein the separator 34 is located between two adjacent cells 11. The spacer 34 is used to contact the adjacent two cells 11, which is advantageous to limit the relative movement between the adjacent two cells 11, and thus to suppress the change in the size of the gap 11 a. In embodiments where the separator 34 is provided on both the first side wall 32 and the second side wall 33, it is advantageous to further limit the relative movement of two adjacent cells 11.

In some embodiments, referring to fig. 8, the spacer 34 includes a first elastic arm 341 and a second elastic arm 342, where the first elastic arm 341 and the second elastic arm 342 are disposed along a first direction X, the first elastic arm 341 abuts against one of the adjacent two cells 11, and the second elastic arm 342 abuts against the other cell 11 of the adjacent two cells 11. The first elastic arm 341 and the second elastic arm 342 can be stressed and deformed, so that assembly errors and dimension errors when the bottom plate 30 and the plurality of battery cells 11 are connected can be absorbed, and further assembly efficiency can be improved. And when the battery module 100 is impacted, the first elastic arm 341 and the second elastic arm 342 play a role in buffering the plurality of battery cells 11, so that rigid impact between the plurality of battery cells 11 and the bottom plate 30 is reduced, and the battery cells 11 are protected.

In some embodiments, referring to fig. 7, the bottom plate 30 further includes a bottom wall 35, the bottom wall 35 is connected to the first side wall 32 and the second side wall 33, and the first opening 31 is provided in the bottom wall 35.

In some embodiments, referring to fig. 7, the bottom wall 35 is adhesively connected to the plurality of cells 11, and the bottom wall 35 is further provided with a strip-shaped groove 351 for receiving adhesive.

In some embodiments, the support 20 is coupled to each of the plurality of cells 11 to facilitate limiting movement between the plurality of cells 11. In some embodiments, the bracket 20 is adhesively attached to the cell 11.

In some embodiments, referring to fig. 6 and 9, in the second direction Y, the distance between the rack 20 and the first wall 1111 is smaller than the distance between the rack 20 and the third wall 1113.

In some embodiments, referring to fig. 9 and 10, the bracket 20 includes a protrusion 21, and the protrusion 21 extends in a direction opposite to the second direction Y. The protruding portion 21 is located between two adjacent cells 11 and is connected to the cells 11. The protruding portion 21 is used for contacting with the battery cells 11, so as to be beneficial to limiting the relative movement between two adjacent battery cells 11, and further beneficial to inhibiting the change of the size of the gap 11 a.

In some embodiments, referring to fig. 6 and 9, a gap 11a is provided between any two adjacent cells 11, the number of the protrusions 21 is plural, the protrusions 21 are disposed along the first direction X, and the protrusions 21 are provided between any two cells 11, so as to be beneficial to inhibiting the change of the size of each gap 11 a.

In some embodiments, referring to fig. 6 and 9, the bracket 20 is provided with a plurality of second openings 22, and the plurality of second openings 22 are disposed along the first direction X, and each protrusion 21 is located between two adjacent second openings 22. The electrode terminal 113 of each cell 11 is exposed from one of the second openings 22, which facilitates the connection and electrical conduction of the electrode terminal 113 with other members.

In some embodiments, referring to fig. 6 and 9, the bracket 20 further includes a plate body 23, the second opening 22 is disposed on the plate body 23, and the protrusion 21 is disposed on a side of the plate body 23 facing the bottom plate 30 along the second direction Y.

In some embodiments, referring to fig. 9 and 10, the plate 23 contacts the first wall 1111 of each cell 11, and along the second direction Y, a plurality of annular recesses 231 are disposed on a side of the plate 23 facing the bottom plate 30, each annular recess 231 is correspondingly disposed around one second opening 22, and the annular recess 231 is filled with a sealant, and the sealant contacts the first wall 1111, so that the support 20 is in sealing connection with the first wall 1111 of the plurality of cells 11, which is beneficial to reducing the risk of foreign matters and moisture passing through the second opening 22 from the gap 11 a.

In some embodiments, referring to fig. 11, the battery module 100 further includes an electrical connector 40, wherein the electrode terminals 113 of two adjacent cells 11 are connected to the electrical connector 40. The electrical connector 40 facilitates connection of the electrode terminals 113 with other conductive structures, for example, one electrical connector 40 is connected to the electrode terminals 113 of two adjacent cells 11, such that the two adjacent cells 11 are connected in series or parallel; for another example, an electrical connector 40 is connected to the electrode terminal 113 of one of the cells 11, and the electrical connector 40 is also connected to an external circuit to electrically connect the cell 11 to the external circuit.

In some embodiments, referring to fig. 11, the number of the electrical connectors 40 is plural, and every two adjacent cells 11 are connected and electrically connected by the electrical connectors 40. The battery module 100 further includes an adapter plate 40a, where the adapter plate 40a is disposed on a side of the support 20 facing away from the battery cell assembly 10, and the adapter plate 40a is connected to and electrically connected to each of the electrical connectors 40, so as to facilitate connecting multiple battery cells 11 in series or parallel. One of the electrical connectors 40 forms the overall negative electrode of the cell assembly 10 and one of the electrical connectors 40 forms the overall negative electrode of the cell assembly 10, facilitating electrical connection of the cell assembly 10 to an external circuit.

In some embodiments, the interposer 40a may be an FPC (Flexible Printed Circuit, flexible circuit board), a harness or PCBA (Printed Circuit Board Assembly ), etc., and the interposer 40a may be used for voltage and temperature collection of the plurality of electric cells 11 without being limited thereto.

In some embodiments, the material of the electrical connector 40 may be copper, nickel, or another metal capable of conducting electricity.

In some embodiments, referring to fig. 11, in the second direction Y, the electrical connector 40 is located on a side of the support 20 away from the cell assembly 10, and the electrode terminals 113 of one of the two adjacent cells 11 pass through one of the second openings 22 and are connected to and electrically connected to the electrical connector 40, and the electrode terminals 113 of the other cell 11 pass through the other of the second openings 22 and are connected to and electrically connected to the electrical connector 40.

In other embodiments, a portion of the electrical connector 40 is located on a side of the holder 20 facing away from the cell assembly 10 in the second direction Y, a portion of the electrical connector 40 passes through one of the second openings 22 and is connected to and electrically communicates with the electrode terminal 113 of one of the cells 11, and a portion of the electrical connector 40 passes through the other of the second openings 22 and is connected to and electrically communicates with the electrode terminal 113 of the other cell 11. As an illustrative example, the electrical connector 40 has a "figure" shape.

In some embodiments, referring to fig. 12, the battery module 100 further includes a circuit board 50 and a conductive member 60, and along the second direction Y, the circuit board 50 and the conductive member 60 are disposed on a side of the bracket 20 facing away from the battery cell assembly 10. Wherein, the electric connector 40 is connected with the conductive member 60, and the conductive member 60 is connected with the circuit board 50. The circuit board 50 and the conductive member 60 are arranged on the side of the bracket 20 away from the battery cell assembly 10, which is beneficial to reducing the distance between the conductive member 60 and the circuit board 50 and the electrode terminal 113 and facilitating the electrical connection between the conductive member 60 and the circuit board 50 and the battery cell 11. The conductive members 60 facilitate electrically connecting the overall positive and overall negative poles of the cell assembly 10 to the circuit board 50.

In some embodiments, referring to fig. 12 and 13, the battery module 100 further includes a top cover 70, wherein, along the second direction Y, the top cover 70 is disposed on a side of the support 20 facing away from the battery cell assembly 10, the top cover 70 has a first cavity 71, and the circuit board 50 is disposed in the first cavity 71. Wherein the top cover 70 is sealingly connected to the bracket 20. The top cover 70 is advantageous in protecting the circuit board 50, the conductive member 60, the electrical connector 40, and the electrode terminal 113, and in reducing impact and corrosion of foreign substances and moisture to the circuit board 50, the conductive member 60, the electrical connector 40, and the electrode terminal 113.

In some embodiments, referring to fig. 13, the circuit board 50 and the top cover 70 may be connected by screwing, riveting, snap-fit connection, or the like. The top cover 70 and the bracket 20 can be fixed by screwing, riveting, clamping and the like.

In some embodiments, referring to fig. 12 to 14, the top cover 70 is provided with an annular groove 72 on a side facing the support 20, the support 20 is provided with an annular protrusion 24, the annular protrusion 24 extends in the second direction Y, and the annular protrusion 24 protrudes into the annular groove 72. Wherein a seal 80 is disposed within the annular groove 72, the seal 80 being contiguous with both the annular projection 24 and the cap 70. The cooperation of the annular groove 72 and the annular protrusion 24 is beneficial to improving the stability of the connection between the top cover 70 and the bracket 20, and the sealing element 80 is beneficial to improving the tightness between the top cover 70 and the bracket 20, and is beneficial to realizing the sealing connection between the top cover 70 and the bracket 20.

In some embodiments, referring to fig. 12-14, an annular groove 72 is disposed around the first cavity 71 to facilitate improving the sealing of the first cavity 71.

In some embodiments, the seal 80 is a sealant that facilitates improving the seal between the cap 70 and the bracket 20, and also enables the cap 70 to be coupled to the bracket 20.

In other embodiments, the seal 80 is a rubber seal, and the top cover 70 is fixedly connected to the bracket 20 through a connecting member such as a bolt.

In some embodiments, referring to fig. 13, the top cover 70 is further provided with a second cavity 73 communicating with the first cavity 71, the battery module 100 further includes a connector 90, the connector 90 is connected with the top cover 70, at least part of the connector 90 is located in the second cavity 73 and connected with the circuit board 50, and at least part of the connector 90 is exposed from the second cavity 73 for connection with an external circuit. The connector 90 facilitates connection of the circuit board 50 to an external circuit, and the second cavity 73 facilitates protection of the connector 90 and the circuit board 50 connected to the connector 90 by the cover 70.

In some embodiments, referring to fig. 13, the connector 90 is sealingly coupled to the cap 70 to reduce the risk of foreign matter, moisture, entering the second cavity 73.

In some embodiments, referring to fig. 12, the battery module 100 further includes a first side plate 101 and a second side plate 102, wherein the first side plate 101 is disposed on one side of the battery cell assembly 10 along the first direction X, and the second side plate 102 is disposed on one side of the battery cell assembly 10 facing away from the first side plate 101. Wherein, the first side plate 101 and the second side plate 102 are connected with the cell assembly 10 and the bottom plate 30. The first side plate 101 and the second side plate 102 are beneficial to improving the connection stability of the battery cell assembly 10 and the bottom plate 30, and are beneficial to protecting two opposite sides of the battery cell assembly 10 in the first direction X.

In some embodiments, referring to fig. 12, the first side plate 101 and the second side plate 102 are both connected to the bracket 20, which is beneficial for improving the integrity among the bracket 20, the cell assembly 10, and the bottom plate 30.

In some embodiments, the first side plate 101 is connected to the bracket 20, the cell assembly 10, and the bottom plate 30 by adhesive bonding, and the second side plate 102 is connected to the bracket 20, the cell assembly 10, and the bottom plate 30 by adhesive bonding.

In some embodiments, referring to fig. 12, the first side plate 101 is provided with fins 103, where the fins 103 are beneficial to strengthen the structural strength of the first side plate 101 and improve the protection of the first side plate 101 against the battery cell assembly 10. The fins 103 are also beneficial to improving the heat exchange area of the first side plate 101 and improving the heat dissipation effect of the first side plate 101.

In some embodiments, referring to fig. 12, the second side plate 102 is provided with fins 103, and the fins 103 are beneficial to strengthening the structural strength of the second side plate 102 and improving the protection effect of the second side plate 102 on the battery cell assembly 10. The fins 103 are also beneficial to improving the heat exchange area of the second side plate 102 and improving the heat dissipation effect of the second side plate 102.

In some embodiments, referring to fig. 12, a plurality of fins 103 are disposed on the first side plate 101, the plurality of fins 103 on the first side plate 101 are disposed at intervals along the second direction Y, a plurality of fins 103 are disposed on the second side plate 102, and the plurality of fins 103 on the second side plate 102 are disposed at intervals along the second direction Y.

In some embodiments, referring to fig. 12, the fins 103 are arranged in a "V" shape. The side of the first side plate 101 facing the cell assembly 10 is provided with a V-shaped recess, and the side of the first side plate 101 facing away from the cell assembly 10 is provided with a V-shaped protrusion corresponding to the V-shaped recess, so as to form the fin 103. The side of the second side plate 102 facing the cell assembly 10 is provided with a V-shaped recess, and the side of the second side plate 102 facing away from the cell assembly 10 is provided with a V-shaped protrusion corresponding to the V-shaped recess, so as to form a fin 103.

Referring to fig. 15, an embodiment of the application further provides an electronic device 1000, where the electronic device 1000 includes a device body 200 and the battery module 100 according to any of the above embodiments, and the battery module 100 is mounted on the device body 200. The battery module 100 is easy to discharge the foreign matters in the air cooling process, so that the reliability of the battery module 100 is improved, and the reliability of the electronic device 1000 with the battery module 100 is further improved.

Because the electronic device 1000 set adopts the technical scheme of any embodiment of the battery module 100, the electronic device at least has the beneficial effects brought by the technical scheme of any embodiment of the battery module 100, and the details are not repeated here.

The electronic device 1000 may be an unmanned aerial vehicle, an electric two-wheeled vehicle, an electric tricycle, a cleaning robot, a mobile refrigerator, a mobile air conditioner, an energy storage cabinet, a portable computer, a digital video camera, a lighting device, or a portable mobile energy source, which are not listed here.

In addition, those skilled in the art will recognize that the foregoing embodiments are merely illustrative of the present application and are not intended to be limiting, as appropriate modifications and variations of the foregoing embodiments are within the scope of the present disclosure.

Claims (15)

1. A battery module, comprising:

the battery cell assembly comprises a plurality of battery cells, wherein the battery cells are arranged along a first direction, and a gap is arranged between two adjacent battery cells;

the bracket is arranged on one side of the battery cell assembly along a second direction perpendicular to the first direction and is connected with the battery cell;

the bottom plate is arranged on one side of the battery cell assembly, which is away from the bracket, along the second direction and is connected with the battery cell;

the bottom plate is provided with a first opening, and the first opening is communicated with the gap when being observed along the second direction.

2. The battery module of claim 1, wherein the first opening extends in a third direction that is perpendicular to the first direction and the second direction.

3. The battery module according to claim 2, wherein the number of the first openings is plural, and the plural first openings are arranged in the first direction;

the number of the gaps is multiple, the gaps exist between every two adjacent battery cores, and the gaps are arranged along the first direction;

wherein each first opening is arranged corresponding to each gap.

4. The battery module according to claim 1, wherein the base plate includes a first side wall and a second side wall, the first side wall and the second side wall being disposed opposite to each other in a third direction, the third direction being perpendicular to the first direction and the second direction;

a partition is arranged on the first side wall; and/or, a partition is arranged on the second side wall;

wherein the separator is positioned between two adjacent battery cells.

5. The battery module of claim 4, wherein the separator includes a first elastic arm and a second elastic arm, the first elastic arm and the second elastic arm being disposed along the first direction, the first elastic arm being abutted against one of the adjacent two cells, the second elastic arm being abutted against the other cell.

6. The battery module according to claim 1, wherein the bracket includes a convex portion that extends in a direction opposite to the second direction;

the convex parts are positioned between two adjacent electric cores and are connected with the electric cores.

7. The battery module of claim 6, wherein the cell is a square-case cell comprising a housing, an electrode assembly, and an electrode terminal;

the electrode assembly is arranged in the shell, the electrode terminal is connected with the electrode assembly, and at least part of the electrode terminal is exposed out of the shell.

8. The battery module according to claim 7, wherein the plurality of protruding portions are provided in the first direction, the bracket is provided with a plurality of second openings provided in the first direction, and each protruding portion is located between two adjacent second openings;

the battery module further comprises an electric connecting piece, wherein electrode terminals of two adjacent battery cells are connected with the electric connecting piece.

9. The battery module of claim 8, further comprising a circuit board and a conductive member disposed on a side of the bracket facing away from the cell assembly along the second direction;

The electric connecting piece is connected with the conducting piece, and the conducting piece is connected with the circuit board.

10. The battery module of claim 9, further comprising a top cover disposed on a side of the bracket facing away from the cell assembly in the second direction, the top cover having a first cavity, the circuit board being disposed in the first cavity;

wherein, the top cap with support sealing connection.

11. The battery module according to claim 10, wherein an annular groove is provided on a side of the top cover facing the bracket, the bracket is provided with an annular protrusion extending in the second direction, and the annular protrusion extends into the annular groove;

and the annular groove is internally provided with a sealing element, and the sealing element is connected with the annular bulge and the top cover.

12. The battery module of claim 10, wherein the top cover is further provided with a second cavity in communication with the first cavity, the battery module further comprising a connector coupled to the top cover, at least a portion of the connector being located within the second cavity and coupled to the circuit board, at least a portion of the connector being exposed from the second cavity for connection to an external circuit.

13. The battery module according to any one of claims 1 to 12, further comprising a first side plate and a second side plate, wherein the first side plate is provided on a side of the cell assembly in the first direction, and the second side plate is provided on a side of the cell assembly facing away from the first side plate;

the first side plate and the second side plate are connected with the battery cell assembly and the bottom plate.

14. The battery module according to claim 13, wherein the first side plate is provided with fins; and/or the second side plate is provided with fins.

15. An electronic device comprising a device body and the battery module according to any one of claims 1 to 14, the battery module being mounted to the device body.