CN220652270U - Battery module - Google Patents

Abstract

The utility model provides a battery module, comprising: a bracket; the battery cell group is positioned in the bracket and comprises a plurality of battery cells which are mutually connected in parallel; the conductive piece is arranged on the bracket in a penetrating way and comprises a contact section, and the contact section is in contact conduction with one end of any battery cell facing the contact section; the contact section is provided with a notch, and one side of the notch facing the battery cell group is provided with a spring plate. The technical scheme of the application effectively solves the problem that the bus plate in the related technology is in cold joint or pseudo joint with the battery cell through the conductive sheet.

Description

Battery module

Technical Field

The utility model relates to the technical field of batteries, in particular to a battery module.

Background

In the related art, a high-safety multifunctional power lithium battery pack is disclosed in patent application publication number CN 206992238U. The positive electrode parallel connection bus plate of each power lithium battery unit of the high-safety multifunctional power lithium battery pack is welded with the positive electrode welding conducting plate and the battery core into a whole, and the negative electrode is the same as the positive electrode. And connecting adjacent power lithium battery units through the flexible connection bus bars, namely connecting the upper end of the anode parallel bus plate of the previous unit with the upper end of the cathode parallel bus plate of the next unit in series to form the battery module.

In the process that the bus plate is welded with the battery cell into a whole through the conductive sheet, the possibility of cold joint or false joint exists in welding, and the production efficiency of the battery module formed by the welded assembly mode is lower.

Disclosure of Invention

The utility model mainly aims to provide a battery module which solves the problem that the possibility of cold joint or false joint exists when a bus plate is welded with a battery cell through a conducting plate in the related art.

In order to achieve the above object, the present utility model provides a battery module including: a bracket; the battery cell group is positioned in the bracket and comprises a plurality of battery cells which are mutually connected in parallel; the conductive piece is arranged on the bracket in a penetrating way and comprises a contact section, and the contact section is in contact conduction with one end of any battery cell facing the contact section; the contact section is provided with a notch, and one side of the notch facing the battery cell group is provided with a spring plate.

Further, a plurality of electric cores connected in parallel form an electric core row, the electric core row is a plurality of, and a plurality of electric core rows are connected in series, and the battery module further comprises a collecting piece arranged on the support, and two electric cores positioned at the head end and the tail end of the electric core row connected in series are electrically connected to the collecting piece towards one end of the support.

Further, two electric cores located at the head end and the tail end are electrically connected to the collecting piece through conductors towards one end of the support, the collecting piece is located at one side, away from the electric core group, of the support, and avoidance holes for avoiding the conductors are formed in the support.

Further, the conductors are arched.

Further, the spring plate comprises an arm body connected to the contact section and a round contact piece connected to the arm body.

Further, the support comprises a base, a first installation position is arranged on the base, one end of the battery cell group facing the base is abutted to the first installation position, the conductive piece comprises a first conductive piece penetrating through the base, the first conductive piece comprises a first contact section located in the first installation position, and the first contact section is in contact conduction with one end of any battery cell facing the base.

Further, the support still includes the lid, is provided with the second installation position that corresponds with first installation position on the lid, and the electric core group presss from both sides to establish between first installation position and second installation position, and electrically conductive piece is including wearing to establish the second electrically conductive piece on the lid, and the second electrically conductive piece is including the second contact section that is located the second installation position, and the second contact section is switched on towards the one end contact of lid with arbitrary electric core. Further, the battery module further comprises a heat dissipation piece which is wound around the plurality of battery cells.

Further, the radiating piece comprises a radiating pipe, and an arc concave surface matched with the battery cell in a contact manner is arranged on the outer side wall of the radiating pipe.

Further, the battery module further comprises a fastener, and the base body and the cover body fix the battery cell group between the first installation position and the second installation position through the fastener.

By applying the technical scheme of the utility model, the battery module comprises: support, electric core group and electrically conductive piece. The battery cell group is positioned in the bracket and comprises a plurality of battery cells which are mutually connected in parallel. In order to facilitate injection molding, the conductive piece is arranged on the support in a penetrating way, and comprises a contact section which is in contact conduction with one end of any battery cell facing the contact section. The contact section is provided with a notch, and one side of the notch facing the battery cell group is provided with a spring plate. The conducting piece is not required to be welded with one end of the battery cell facing the contact section, a plurality of battery cells can be connected in parallel, the plurality of battery cells which are connected in parallel form a battery cell row, and then the plurality of battery cell rows can be connected in series through the conducting piece, so that the problem that the possibility of cold welding or false welding exists between the busbar in the related art and the battery cell through the welding of the conducting piece can be solved without using the busbar and the conducting piece in the related art, and the elastic sheet is helpful for guaranteeing the conductive performance of contact conduction with one end of the battery cell. Meanwhile, compared with the mode of adopting bus plate welding in the related art, the connecting mode of the elastic sheet contact conduction on the contact section can greatly improve production efficiency, is beneficial to saving production cost, meanwhile, does not expose the bus plate, greatly reduces the potential possibility of virtual welding or false welding, reduces the risk of short circuit, ensures higher safety coefficient and brings better safety experience to users.

Drawings

The accompanying drawings, which are included to provide a further understanding of the utility model and are incorporated in and constitute a part of this specification, illustrate embodiments of the utility model and together with the description serve to explain the utility model. In the drawings:

fig. 1 shows a schematic perspective view of an embodiment of a battery module according to the present utility model;

fig. 2 shows an enlarged schematic view at a of the battery module of fig. 1;

fig. 3 is a schematic view illustrating an exploded structure of the battery module of fig. 1;

fig. 4 shows an enlarged schematic view of a battery module at B of fig. 3;

fig. 5 is a schematic perspective view illustrating the battery module of fig. 1 with a cover removed;

fig. 6 is a schematic perspective view illustrating a cover of the battery module of fig. 1.

Wherein the above figures include the following reference numerals:

10. a base; 11. a first mounting location;

20. a cell group; 21. a cell row; 211. a battery cell;

30. a cover body; 31. a second mounting location; 32. avoidance holes;

40. a heat sink; 41. an arc-shaped concave surface; 42. an inlet; 43. an outlet;

50. a first conductive member; 51. a first contact section; 52. a notch; 53. a spring plate; 531. an arm body; 532. a circular contact piece; 60. a second conductive member; 61. a second contact section;

70. a collection member; 71. a conductor;

80. a fastener.

Detailed Description

The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. The following description of at least one exemplary embodiment is merely exemplary in nature and is in no way intended to limit the utility model, its application, or uses. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments in accordance with the present application. As used herein, the singular is also intended to include the plural unless the context clearly indicates otherwise, and furthermore, it is to be understood that the terms "comprises" and/or "comprising" when used in this specification are taken to specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof.

The relative arrangement of the components and steps, numerical expressions and numerical values set forth in these embodiments do not limit the scope of the present utility model unless it is specifically stated otherwise. Meanwhile, it should be understood that the sizes of the respective parts shown in the drawings are not drawn in actual scale for convenience of description. Techniques, methods, and apparatus known to one of ordinary skill in the relevant art may not be discussed in detail, but should be considered part of the specification where appropriate. In all examples shown and discussed herein, any specific values should be construed as merely illustrative, and not a limitation. Thus, other examples of the exemplary embodiments may have different values. It should be noted that: like reference numerals and letters denote like items in the following figures, and thus once an item is defined in one figure, no further discussion thereof is necessary in subsequent figures.

As shown in fig. 1 to 5, the battery module of the present embodiment includes: a bracket, a battery cell group 20 and a conductive member. The battery cell group 20 is located in the bracket, and the battery cell group 20 comprises a plurality of battery cells 211 connected in parallel. In order to facilitate injection molding, the conductive member is arranged on the support in a penetrating manner, and the conductive member comprises a contact section, wherein the contact section is in contact conduction with one end, facing the contact section, of any electric core 211. The contact section is provided with a notch 52, and one side of the notch 52 facing the battery cell group is provided with a spring piece 53.

By applying the technical scheme of the embodiment, the conductive piece is arranged on the support in a penetrating way, and the contact section is in contact conduction with one end of any electric core 211 facing the contact section. The conducting piece is not required to be welded with one end of the battery cell 211 facing the contact section, so that the plurality of battery cells 211 can be connected in parallel with each other, the plurality of battery cells 211 which are connected in parallel form the battery cell row 21, and then the plurality of battery cell rows 21 can be connected in series through the conducting piece, so that the problem that the possibility of virtual welding or false welding exists between the bus plate and the battery cells through the welding between the bus plate and the battery cells in the related art can be solved without using the bus plate and the conducting sheet in the related art, and the elastic sheet is helpful for guaranteeing the conductive performance of contact conduction with one end of the battery cells. Meanwhile, compared with the mode of adopting bus plate welding in the related art, the connecting mode of the elastic plate 53 contact conduction on the contact section can greatly improve production efficiency, is beneficial to saving production cost, meanwhile, does not expose the bus plate, greatly reduces the potential possibility of virtual welding or false welding, reduces the risk of short circuit, ensures higher safety coefficient and brings better safety experience to users.

As shown in fig. 1 to 5, the battery module further includes a collecting member 70 disposed on the support, and two cells 211 located at the front and rear ends of the cells 211 of the plurality of cell lines 21 connected in series are electrically connected to the collecting member 70 toward one end of the support. Specifically, the plurality of cells 211 connected in parallel form a plurality of cell rows 21, and the plurality of cell rows 21 are connected in series. The battery module further comprises a collecting member 70 arranged on the cover 30, and when the collecting member 70 is arranged on the cover 30, two electric cores 211 positioned at the front end and the rear end of the electric cores 211 of the plurality of electric core rows 21 connected in series are electrically connected to the collecting member 70 towards one end of the cover 30. The collector 70 can collect the voltage or current of the battery cells 211 of the battery cell row 21, so as to monitor the collected voltage or current later.

In an embodiment not shown in the drawings, when the collecting member is disposed on the housing, two of the cells located at the front and rear ends of the plurality of cells in the series-connected cell rows are electrically connected to the collecting member toward one end of the housing.

As shown in fig. 1 to 5, the collecting member 70 includes a collecting plate for convenience of processing and manufacturing. The acquisition board is welded at two ends of the battery cells of the plurality of battery cell rows connected in series, wherein the two battery cells face one end of the cover body 30.

As shown in fig. 1 to 5, two electric cores 211 positioned at the front end and the rear end are electrically connected to the collecting member 70 through conductors 71 at the ends facing the support, the collecting member 70 is positioned at one side of the support away from the electric core group 20, and the support is provided with avoiding holes 32 for avoiding the conductors 71. Specifically, when the collecting member 70 is disposed on the cover 30, the two electric cores 211 located at the front end and the rear end are electrically connected to the collecting member 70 through the conductors 71 toward one end of the cover 30, the collecting member 70 is located at one side of the cover 30 away from the electric core set 20, and the cover 30 can separate the collecting member 70 from the second conductive member 60 to perform an insulating function. In order to facilitate the conductor 71 to pass through the cover 30 smoothly, the cover 30 is provided with a relief hole 32 for relieving the conductor 71.

As shown in fig. 1 to 5, since the collecting member 70 is located at the side of the cover 30 facing away from the battery cell group 20, there is a height difference between the collecting member 70 and the end of the battery cell 211 facing toward the cover 30, and the conductor 71 is arched for convenience of connection.

As shown in fig. 3 to 6, the bracket includes a base 10, and in order to facilitate mounting of the battery cell group 20 on the base 10, a first mounting position 11 is provided on the base 10, and one end of the battery cell group 20 facing the base 10 abuts against the first mounting position 11. In order to facilitate the injection molding process, the conductive member includes a first conductive member 50 penetrating the base 10, the first conductive member 50 includes a first contact section 51 located in the first mounting position 11, and the first contact section 51 is in contact conduction with one end of any of the battery cells 211 facing the base 10.

As shown in fig. 3 to 6, the bracket further includes a cover 30, and in order to facilitate mounting of the battery cell group 20 on the cover 30, a second mounting location 31 corresponding to the first mounting location 11 is provided on the cover 30, and the battery cell group 20 is sandwiched between the first mounting location 11 and the second mounting location 31. In order to facilitate the injection molding process, the conductive member includes a second conductive member 60 penetrating the cover 30, and the second conductive member 60 includes a second contact section 61 located in the second mounting position 31, where the second contact section 61 is in contact conduction with one end of any of the battery cells 211 toward the cover 30. The plurality of parallel-connected battery cells 211 form a battery cell row, and then the plurality of battery cell rows can be connected in series through the second conductive piece 60, so that the problem that the possibility of cold welding or false welding exists between the bus plate and the battery cells through the conductive sheet in the related art can be solved without using the bus plate and the conductive sheet in the related art to perform welding operation with the battery cells.

The first mounting location 11 and the second mounting location 31 of the present embodiment are each preferably circular mounting counterbores. As shown in fig. 3 to 6, the first contact section 51 and the second contact section 61 are each provided with a notch 52, and a spring piece 53 is disposed at a side of the notch 52 facing the battery cell group 20. The elastic sheet is helpful for ensuring the conductivity of the contact conduction with one end of the battery cell. Meanwhile, compared with the mode of adopting bus plate welding in the related art, the connecting mode of contact conduction of the elastic sheet 53 on the cover body 30 and the base body 10 can greatly improve production efficiency, is beneficial to saving production cost, meanwhile, no bus plate is exposed, the potential possibility of cold welding or false welding is greatly reduced, the risk of short circuit is reduced, the safety coefficient is higher, and better safety experience is brought to users.

Of course, in the embodiment not shown in the drawings, the first contact section or the second contact section is provided with a notch, and a spring plate is disposed at a side of the notch facing the battery cell group.

As shown in fig. 3 to 6, the spring piece 53 includes an arm 531 connected to the contact section and a circular contact piece 532 connected to the arm 531. The shape of the circular contact piece 532 is matched with that of one end of the battery cell, so that the contact area of the circular contact piece 532 with one end of the battery cell can be ensured, and the conductive performance of the circular contact piece with one end of the battery cell can be ensured.

In this embodiment, the plurality of cell rows 21 are arranged in rows, and the polarities of the electrodes at both ends of the cells 211 of any adjacent two cell rows 21 are opposite. The heat dissipation piece is wound between the plurality of cell rows in a roundabout way, and the heat dissipation piece is inserted between the plurality of cell rows. Of course, in the embodiment not shown in the drawings, the plurality of cell rows may be a plurality of cell columns arranged in columns, and the polarities of the electrodes at both ends of the cells of any two adjacent cell columns are opposite.

As shown in fig. 1 to 5, the battery module further includes a heat sink 40 wound around between the plurality of battery cells 211. The heat dissipation member 40 is inserted between the plurality of battery cell rows 21, and can take away the heat generated by the battery cells during the operation of the battery module, so that the battery cells are kept in a relatively stable and safe working environment, and the working performance of the battery module is guaranteed.

Of course, in the embodiment not shown in the drawings, the heat dissipation member is wound around the plurality of cell rows, the heat dissipation member is inserted between the plurality of cell rows, and can take away heat generated by the cells when the battery module works, and the first conductive member is in contact conduction with one end of the cells of any cell row, which faces the base body. The second conductive piece is in contact conduction with one end, facing the cover body, of the battery cell of any battery cell column, so that the battery cell columns are connected in series.

As shown in fig. 3 to 6, the heat sink 40 includes a heat dissipating tube, and an arc-shaped concave surface 41 in contact with the battery cell 211 is disposed on an outer sidewall of the heat dissipating tube. The shape of the arc concave surface 41 is matched with the shape of the outer side wall of the battery core 211, when the heat dissipation part 40 winds around among the plurality of battery core rows 21, the arc concave surface 41 can be better attached to the outer side wall of the battery core 211, and when the battery core 211 generates excessive heat, the arc concave surface 41 and the battery core 211 have enough large contact area, so that the heat dissipation pipe can quickly carry away the excessive heat. So as to meet the endurance requirement of traveling and the performance requirement on the battery module. The two ends of the radiating pipe are respectively provided with an inlet 42 and an outlet 43, and the battery module is radiated by a liquid cooling radiating mode.

As shown in fig. 1 to 6, the battery module further includes a fastener 80, and the base body 10 and the cover body 30 fix the battery cell pack 20 between the first mounting position 11 and the second mounting position 31 by the fastener 80. The connection of the base 10 and the cover 30 by the fastener 80 generates a clamping force between the base 10 and the cover 30 to clamp the battery cell group 20 between the first mounting location 11 and the second mounting location 31. Or the fastening member 80 applies a pushing force to the battery cell group 20 after the base body 10 and the cover body 30 are connected by the fastening member 80 so as to clamp the battery cell group 20 between the first mounting position 11 and the second mounting position 31. After the base body 10 and the cover body 30 are buckled together and fixed by the fastener 80, the series connection and the conduction of the plurality of battery cell rows 21 can be quickly realized. The first conductive element 50 and the second conductive element 60 are respectively in direct contact with and conductive with two ends of the battery core 211, which can greatly improve the production efficiency and is beneficial to saving the production cost. The fastener 80 is preferably a screw.

In this embodiment, the base 10 has the first conductive member 50, the cover 30 has the second conductive member 60, and in the assembly process, only the battery cells 211 of the battery cell group 20 need be placed into the circular mounting counter bore on the base 10. At this time, the first contact section 51 on the base 10 is in contact conduction with one end of the battery cell 211 facing the base 10. The cover body 30 is buckled on the base body 10, so that the battery cells 211 of the battery cell group 20 can penetrate into the circular mounting counter bore on the cover body 30, the battery cell group 20 is fixed between the first mounting position 11 and the second mounting position 31 through the fastener, and at the moment, the second contact section 61 on the cover body 30 is contacted and conducted with one end of the battery cells 211, which faces the cover body 30, so that series connection conduction of the battery cell modules is realized, and the efficiency of assembling the battery cell modules during production is greatly improved.

In the description of the present utility model, it should be understood that the azimuth or positional relationships indicated by the azimuth terms such as "front, rear, upper, lower, left, right", "lateral, vertical, horizontal", and "top, bottom", etc., are generally based on the azimuth or positional relationships shown in the drawings, merely to facilitate description of the present utility model and simplify the description, and these azimuth terms do not indicate and imply that the apparatus or elements referred to must have a specific azimuth or be constructed and operated in a specific azimuth, and thus should not be construed as limiting the scope of protection of the present utility model; the orientation word "inner and outer" refers to inner and outer relative to the contour of the respective component itself.

Spatially relative terms, such as "above … …," "above … …," "upper surface at … …," "above," and the like, may be used herein for ease of description to describe one device or feature's spatial location relative to another device or feature as illustrated in the figures. It will be understood that the spatially relative terms are intended to encompass different orientations in use or operation in addition to the orientation depicted in the figures. For example, if the device in the figures is turned over, elements described as "above" or "over" other devices or structures would then be oriented "below" or "beneath" the other devices or structures. Thus, the exemplary term "above … …" may include both orientations of "above … …" and "below … …". The device may also be positioned in other different ways (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.

In addition, the terms "first", "second", etc. are used to define the components, and are only for convenience of distinguishing the corresponding components, and the terms have no special meaning unless otherwise stated, and therefore should not be construed as limiting the scope of the present utility model.

The above description is only of the preferred embodiments of the present utility model and is not intended to limit the present utility model, but various modifications and variations can be made to the present utility model by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present utility model should be included in the protection scope of the present utility model.

Claims (10)

1. A battery module, comprising:

a bracket;

a battery cell group (20) positioned in the bracket, wherein the battery cell group (20) comprises a plurality of battery cells (211) which are mutually connected in parallel;

the conductive piece is arranged on the support in a penetrating way and comprises a contact section, and the contact section is in contact conduction with one end of any battery cell (211) facing the contact section;

the contact section is provided with a notch (52), and one side of the notch (52) facing the battery cell group is provided with a spring piece (53).

2. The battery module according to claim 1, wherein a plurality of the electric cells (211) connected in parallel with each other form an electric cell row (21), the electric cell row (21) is a plurality of the electric cell rows (21) connected in series, the battery module further comprises a collecting member (70) arranged on the support, and two electric cells (211) positioned at the front end and the rear end of the electric cells (211) of the electric cell row (21) connected in series are electrically connected to the collecting member (70) towards one end of the support.

3. The battery module according to claim 2, wherein one end of each of the two electric cores (211) located at the front end and the rear end facing the support is electrically connected to the collecting member (70) through a conductor (71), the collecting member (70) is located at one side of the support, which is away from the electric core group (20), and an avoidance hole (32) for avoiding the conductor (71) is formed in the support.

4. A battery module according to claim 3, wherein the conductor (71) is arched.

5. The battery module according to claim 1, wherein the elastic piece (53) includes an arm body (531) connected to the contact section and a circular contact piece (532) connected to the arm body (531).

6. The battery module according to any one of claims 1 to 5, wherein the bracket comprises a base (10), a first mounting position (11) is arranged on the base (10), one end of the battery cell group (20) facing the base (10) is abutted to the first mounting position (11), the conductive member comprises a first conductive member (50) penetrating through the base (10), the first conductive member (50) comprises a first contact section (51) located in the first mounting position (11), and the first contact section (51) is in contact conduction with one end of any battery cell (211) facing the base (10).

7. The battery module according to claim 6, wherein the bracket further comprises a cover body (30), a second mounting position (31) corresponding to the first mounting position (11) is arranged on the cover body (30), the battery cell group (20) is clamped between the first mounting position (11) and the second mounting position (31), the conductive member comprises a second conductive member (60) penetrating through the cover body (30), the second conductive member (60) comprises a second contact section (61) located in the second mounting position (31), and the second contact section (61) is in contact conduction with one end of any battery cell (211) towards the cover body (30).

8. The battery module according to any one of claims 1 to 5, further comprising a heat sink (40) wound around between the plurality of battery cells (211).

9. The battery module according to claim 8, wherein the heat dissipation member (40) comprises a heat dissipation pipe, and an arc-shaped concave surface (41) in contact fit with the battery cell (211) is provided on an outer side wall of the heat dissipation pipe.

10. The battery module according to claim 7, further comprising a fastener (80), wherein the base (10) and the cover (30) fix the battery cell group (20) between the first mounting location (11) and the second mounting location (31) by the fastener (80).