CN215184418U - Adapter plate and battery module - Google Patents

Abstract

The utility model provides an adapter plate and a battery module, the adapter plate comprises a plate body and busbars, the busbars comprise at least one first busbar, the plate body comprises a first surface and a second surface which are oppositely arranged, the first busbars are arranged on the first surface, communication holes which are communicated with the first surface and the second surface are arranged on the plate body, and tabs are provided for the second surface to penetrate through the first surface; the first busbar comprises a first busbar section and a second busbar section which are connected with each other, the hardness of the first busbar section is smaller than that of the second busbar section, and the second busbar section is arranged close to the communication hole and connected with the lug. Because the second busbar section is hard busbar, the forming precision is high, the structural strength after the second busbar section is connected with the lug is high, and the reliability of the battery module is high. Therefore, the utility model provides a keysets and battery module has improved the structural strength of part copper bar and battery module utmost point ear junction, and battery module's reliability is higher.

Description

Adapter plate and battery module

Technical Field

The embodiment of the utility model provides a relate to battery technical field, especially relate to an adapter plate and battery module.

Background

The lithium ion battery has become a main flow power current used by the aerospace unmanned aerial vehicle and related models rapidly due to the advantages of light weight, large energy storage, large power, long service life, small self-discharge coefficient, wide temperature application range and the like.

In the related art, the battery module comprises a plurality of electric cores connected in series, the positive and negative electrode lugs of the battery module are respectively connected with an external circuit after being led out through a total positive copper bar and a total negative copper bar, and the total positive copper bar and the total negative copper bar are formed by soft copper bars.

However, the soft copper bar is low in hardness and easy to deform, and the structural strength of the welding position of the soft copper bar and the lug of the battery module is low, so that the reliability of the battery module is low.

SUMMERY OF THE UTILITY MODEL

In view of this, the embodiment of the utility model provides an adaptor plate and battery module has improved the structural strength of part copper bar and utmost point ear junction, and battery module's reliability is higher.

The embodiment of the utility model provides an adapter plate for connecting utmost point ear and busbar, the adapter plate includes plate body and busbar, the busbar includes at least one first busbar, the plate body includes relative first surface and the second surface that sets up, first busbar sets up on the first surface, set up the intercommunicating pore that communicates first surface and second surface on the plate body, the intercommunicating pore supplies utmost point ear to wear to establish to the first surface by the second surface;

the first busbar comprises a first busbar section and a second busbar section which are connected with each other, the hardness of the first busbar section is smaller than that of the second busbar section, and the second busbar section is arranged close to the communication hole and connected with the lug.

So set up, because the second busbar section is hard busbar, non-deformable, and the shaping precision is higher, and its structural strength after being connected with utmost point ear is higher, and battery module's reliability is higher.

In some embodiments, which may include the above embodiments, the first busbar further includes: and the first busbar section is connected with the second busbar section through the reinforced connecting piece.

In some embodiments, which may include the above-described embodiments, the reinforcing connector is a reinforcing busbar having a greater stiffness than the first busbar section, the reinforcing connector includes a first connecting surface and a second connecting surface, the first connecting surface is connected to the first busbar section, and the second connecting surface is connected to the second busbar section.

In some embodiments, which may include the above embodiments, further comprising: and the second busbars are arranged on the first surface and are arranged in an array.

In some embodiments, which may include the above embodiments, the plate body is provided with a plurality of limiting holes, the limiting holes communicate the first surface and the second surface, and the limiting holes communicate with the communication holes;

and each second busbar is provided with a limiting lug boss, and the limiting lug bosses are inserted into the limiting holes in a one-to-one correspondence manner.

Additionally, the embodiment of the utility model provides a still provide a battery module, include at least: the shell cover and the bottom shell, the electric core group and the adapter plate in the embodiment are arranged, one end of the bottom shell is provided with an opening, the shell cover is arranged at one end of the opening of the bottom shell, the electric core group and the adapter plate are positioned in the bottom shell, and the adapter plate is positioned between the electric core group and the shell cover;

the electric core group comprises a plurality of electric cores which are arranged in a stacked mode, and the electric cores are all electrically connected through the adapter plate.

In some embodiments which may include the above embodiments, one end of each battery cell facing the housing cover is provided with a positive tab and a negative tab which extend towards the housing cover, and the positive tab and the negative tab are both inserted into the communication hole of the adapter plate and connected to the busbar of the adapter plate.

In some embodiments, which may include the above embodiments, further comprising: the lug radiator is positioned between the shell cover and the adapter plate, the first bus bar of the adapter plate comprises a positive bus bar and a negative bus bar, and the positive bus bar and the negative bus bar sequentially penetrate through the adapter plate and the lug radiator and then enter the shell cover and are connected with the shell cover.

In some embodiments, which may include the above embodiments, the cover may be folded to cover the tab heat sink, and the cover is covered on the open end of the bottom case through the tab heat sink.

In some embodiments that may include the foregoing embodiments, a battery management system is disposed on an inner wall of the housing cover, a space opposing to a component of the battery management system is disposed on the tab radiator, and a portion of the positive bus bar and the negative bus bar is attached to a surface of the space and a surface of the battery management system.

In some embodiments which may include the above embodiments, a plurality of heat dissipation fins are arranged in the tab heat sink, each heat dissipation fin extends along the thickness direction of the bottom case, and the positive bus bar and the negative bus bar pass through the through holes on the tab heat sink and then are connected with the case cover;

the through holes penetrate through the lug radiators along the direction from the electric core group to the shell cover, and are isolated from the radiating fins.

The embodiment of the utility model provides an adapter plate and battery module, the adapter plate includes plate body and busbar, and the busbar includes at least one first busbar, and the plate body includes relative first surface and the second surface that sets up, and the first busbar sets up on the first surface, has seted up the intercommunicating pore that communicates first surface and second surface on the plate body, and the intercommunicating pore supplies utmost point ear to wear to establish to the first surface by the second surface; the first busbar includes a first busbar section and a second busbar section connected to each other, and the first busbar section has a hardness smaller than that of the second busbar section. The first busbar section is a soft busbar, the second busbar section is a hard busbar, and the second busbar section is arranged close to the communicating hole and connected with the lug. Because the second busbar section is hard busbar, the hardness of hard busbar is higher, and the shaping precision is high, and the structural strength after connecting second busbar section and utmost point ear is higher, and the reliability of battery module is higher. Therefore, the adaptor plate and the battery module provided by the embodiment improve the structural strength of the joint of the partial bus bar and the battery module tab, and the reliability of the battery module is higher.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly described below, and it is easy to see that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.

Fig. 1 is a schematic view of a partial structure of a battery module according to an embodiment of the present invention;

fig. 1a is a schematic structural diagram of a battery module according to an embodiment of the present invention;

fig. 2 is a schematic perspective view of an adapter plate according to an embodiment of the present invention;

fig. 3 is a schematic top view of an adapter plate according to an embodiment of the present invention;

fig. 4 is a schematic perspective view of a first bus bar according to an embodiment of the present invention;

fig. 5 is a schematic front view of a first bus bar according to an embodiment of the present invention;

fig. 6 is a rear view schematic structural diagram of a first bus bar according to an embodiment of the present invention;

fig. 7 is a schematic perspective view of a second bus bar according to an embodiment of the present invention;

fig. 8 is a schematic bottom view of a second bus bar according to an embodiment of the present invention.

Description of reference numerals:

100: a bottom case;

200: an adapter plate;

300: a tab radiator;

301: an evacuation section;

302: heat dissipation holes;

303: a heat dissipating fin;

400: a shell cover;

500: a battery management system;

10: a plate body;

10 a: a first surface;

11: a communicating hole;

12: a limiting hole;

20: a bus bar;

21: a first bus bar;

21 a: a positive electrode bus bar;

21 b: a negative electrode bus bar;

211: a first busbar section;

212: a second busbar segment;

213: reinforcing the connecting piece;

2131: a first connection face;

2132: a second connection face;

22: a second bus bar;

221: a third busbar segment;

222: a fourth busbar segment;

23: the bus bar is connected internally.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.

Lithium ion battery can regard as the energy supply of electronic equipment such as unmanned aerial vehicle, along with the development of battery technology, and requirement such as reliability and packaging efficiency to the product is higher and higher.

In the related art, the battery module may include a plurality of battery cells, and the plurality of battery cells are connected in series. The positive and negative electrode ears of the battery module are respectively connected with the circuit outside the battery module after being led out through the total positive copper bar and the total negative copper bar, so that a loop is formed with the external circuit of the battery module, and power is supplied to external equipment such as an unmanned aerial vehicle. In order to facilitate the spatial arrangement of the total positive copper bars and the total negative copper bars inside the battery module, the total positive copper bars and the total negative copper bars can be formed by soft copper bars, and the soft copper bars can be formed by stacking a plurality of layers of soft copper foils.

However, because the soft copper bar is low in hardness, the forming precision is not high, the soft copper bar is easy to modify, and the multiple layers of soft copper foils are easy to separate, so that the structural strength of the welding part of the soft copper bar and the lug of the battery module is low, the soft copper bar and the lug are easy to separate, the battery module is caused to lose efficacy, and the reliability of the battery module is low.

In order to solve the above problems, the present embodiment provides an interposer and a battery module, in which a first bus bar is disposed, the first bus bar includes a first bus bar section and a second bus bar section connected to each other, a hardness of the first bus bar section is smaller than that of the second bus bar section, and the second bus bar section is disposed near a tab and connected to the tab. The first bus bar can be used as a positive electrode bus bar or a negative electrode bus bar of the battery module and is connected with a positive electrode lug or a negative electrode lug of the battery module. Because the second busbar section is hard busbar, non-deformable, and the shaping precision is higher, and its structural strength after being connected with utmost point ear is higher, and battery module's reliability is higher.

As shown in fig. 1 and fig. 1a, the present embodiment provides a battery module, which includes a plurality of battery cells (not shown in the figure) stacked in a stacking manner. The plurality of cells may be stacked in at least one column, for example, 1 column, 2 columns, 3 columns, and 4 columns, and the number of the stacked columns of the cells is not limited. Each battery cell comprises a positive electrode tab and a negative electrode tab. The positive tab and the negative tab of each battery cell can be arranged at one end of the battery cell and extend in the direction away from the battery cell, and the extending directions of the positive tab and the negative tab are parallel to the plane where the battery cell is located.

In the same row of cells, the positive tab of one of the two adjacent cells and the negative tab of the other cell can be connected in series, so that the cells in the same row are connected in series. And two adjacent columns of battery cells can also be connected in series, so that the battery cells are connected in series. Therefore, all the battery cells in the whole battery module are connected in series to form a series connection route. The battery cell that is located both ends on the series connection route, the positive pole ear of one of them electricity core and the negative pole ear of another electricity core have formed the positive negative pole ear of whole battery module. The positive and negative electrode tabs of the Battery module can be respectively led out through the positive bus bar 21a and the negative bus bar 21b, and then connected to a Battery Management System 500 (BMS), and further connected to an external electronic device or power supply through an interface on the BMS, so as to charge and discharge the Battery module.

In order to protect the battery module, the outside of the battery module can be provided with a shell, and a plurality of battery cores are arranged inside the shell. The housing may be configured as a flip-type housing, and the housing may include a housing cover 400 and a bottom housing 100, the battery pack is located in the bottom housing 100, an opening is formed at one end of the bottom housing 100, and the housing cover 400 covers one end of the opening of the bottom housing 100. Thus, the case cover 400 of the case is conveniently opened to observe and maintain the inside of the battery module.

The electric core groups can be connected in series through the adapter plate 200, and the adapter plate 200 is located in the bottom case 100. The positive tab and the negative tab of each cell can both face the case cover 400, the adapter plate 200 is located between the case cover 400 and the cell group, and the tabs penetrate through the adapter plate 200 and are electrically connected with the adapter plate 200.

In order to radiate the lugs, a lug radiator 300 is arranged between the shell cover 400 and the adapter plate 200, the lug radiator 300 is in contact with the lugs to absorb heat of the lugs, and the battery cell can be cooled through the lugs and the lug radiator 300.

The positive electrode bus bar 21a and the negative electrode bus bar 21b sequentially pass through the interposer 200 and the tab heat sink 300, enter the case cover 400, and are connected to the case cover 400. Case cover 400 is covered at one end of the opening of bottom case 100 through tab heat sink 300, tab heat sink 300 is connected to bottom case 100, and tab heat sink 300 may be further connected to case cover 400. In order to open the housing cover 400, the housing cover 400 is connected to the tab heat sink 300 in a foldable manner, and the housing cover 400 covers the tab heat sink 300.

The BMS may be disposed on an inner wall of the housing cover 400 such that the housing cover 400, which is opened, can perform operations such as observation and maintenance of the part of the BMS located inside the housing.

The battery module comprises an adapter plate 200, and the adapter plate 200 is used for connecting a plurality of battery cells in series. The interposer 200 may be disposed on a side of each cell where the positive electrode tab and the negative electrode tab are disposed.

The interposer 200 provided in the present embodiment will be described in detail below with reference to the accompanying drawings.

It should be noted that the bus bar of this embodiment may be a metal bar such as a copper bar or an aluminum bar, and is used to connect tabs of the battery cells in series. The present embodiment is described with copper bars as an example.

As shown in fig. 2 and 3, the present embodiment provides an adapter plate 200, where the adapter plate 200 includes a plate body 10 and a bus bar 20, and the bus bar 20 includes at least one first bus bar 21. The plate body 10 includes a first surface 10a and a second surface that are oppositely disposed, the first surface 10a serves as a mounting surface of the first bus bar 21, the first bus bar 21 is disposed on the first surface 10a, and the second surface is a surface close to the battery cell. The interposer 200 connects the cells in series via a plurality of busbars 20.

The plate body 10 is provided with a communication hole 11 for communicating the first surface 10a and the second surface, and the communication hole 11 is used for the tab to penetrate from the second surface to the first surface 10 a. The tabs can extend out from the first surface 10a after passing through the communication hole 11, and the tabs are connected in series at one side of the first surface 10a, so that the operation is convenient.

As shown in fig. 4 to 6, the first busbar 21 may include a first busbar section 211 and a second busbar section 212 connected to each other, wherein the first busbar section 211 has a hardness smaller than that of the second busbar section 212. For example, the first busbar section 211 can be soft copper bar, and the second busbar section 212 can be hard copper bar, and hard copper bar's hardness is higher, and the shaping precision is high, if be connected second busbar section 212 and utmost point ear, compare in directly linking to each other soft copper bar with utmost point ear, its structural strength is higher, and battery module's reliability is higher.

In addition, first busbar section 211 is the soft copper bar, and its arrangement position in the battery module is comparatively nimble, convenient assembling, and the soft copper bar has partial buffer performance, can also absorb more stress. For example, the first bus bar 21 may be connected to the BMS on the case cover 400, or the first bus bar 21 may be led out of the case after passing through the cover 400. The shell cover 400 can bend the first bus bar 21 in the opening and closing processes, and the first bus bar section 211 is a soft copper bar, so that the bending requirement can be met, and the shell cover 400 of the shell can be conveniently opened. Therefore, the present embodiment utilizes the advantages of the soft and hard bus bars, respectively, by combining the soft and hard bus bars.

For example, the extending direction of the second bus bar section 212 may be parallel to the plate body 10 of the interposer 200, so that the connection area between the second bus bar section 212 and the plate body 10 of the interposer 200 is large, and the connection between the second bus bar section 212 and the plate body 10 is stable. In addition, the connection surface between the second busbar section 212 and the tab is large, and the connection between the second busbar section 212 and the tab is stable.

The extending direction of the second bus bar segment 212 may be the same as the extending direction of the plate body 10, and of course, the extending direction of the second bus bar segment 212 may also be different from the extending direction of the plate body 10. The present embodiment is described in the case that the extending direction of the second bus bar segment 212 is the same as the extending direction of the plate body 10. The extending direction (longitudinal direction) of the plate body 10 is a first direction, the width direction of the plate body 10 is a second direction, and the thickness direction of the plate body 10 is a third direction.

In order to avoid the influence of the first bus bar segment 211 on the pole ear connection, the first bus bar segment 211 may be disposed at one end of the second bus bar segment 212 in the first direction; the first bus bar segment 211 may also be disposed at one end of the second bus bar segment 212 in the second direction. In other examples, the first bus bar segment 211 may be further disposed on a side of the second bus bar segment 212 facing away from the plate body 10, and the area where the first bus bar segment 211 and the second bus bar segment 212 may contact is larger, so that the connection stability is better.

The present embodiment is described with the first bus bar segment 211 disposed at one end of the second bus bar segment 212 in the second direction.

For example, a portion of the communication hole 11 may be disposed near the second bus bar segment 212, so that the tab is extended from the communication hole 11 and is located at a short distance from the second bus bar segment 212, and the tab is conveniently connected to the second bus bar segment 212.

The adapter plate 200 provided by the application is used for connecting tabs, the adapter plate 200 comprises a plate body 10 and busbars 20, the busbars 20 comprise at least one first busbar 21, the plate body 10 comprises a first surface 10a and a second surface which are oppositely arranged, the first busbar 21 is arranged on the first surface 10a, a communication hole 11 for communicating the first surface 10a with the second surface is formed in the plate body 10, and the second surface of the tab penetrates through the communication hole 11 to the first surface 10 a; the first bus bar 21 includes a first bus bar section 211 and a second bus bar section 212 connected to each other, the first bus bar section 211 having a hardness smaller than that of the second bus bar section 212, and the second bus bar section 212 being disposed adjacent to the communication hole 11 and connected to the tab. Because the second bus bar section 212 is a hard bus bar, the hardness of the hard bus bar is high, the forming precision is high, the structural strength after the second bus bar section 212 is connected with the tabs is high, and the reliability of the battery module is high. Therefore, the adaptor plate 200 provided by the embodiment improves the structural strength of the joint of the partial copper bar and the electrode lug of the battery module, and the reliability of the battery module is higher.

In some examples, as shown in fig. 3, the number of the first bus bars 21 may be two, and the two first bus bars 21 form a positive bus bar 21a and a negative bus bar 21b of the interposer 200, respectively. In this way, the positive and negative electrode tabs of the battery module can be led out of the battery module through the two first bus bars 21 and then connected to an external electronic device or a power supply of the battery module.

The two first busbars 21 may be respectively disposed at two opposite ends of the interposer 200, so that the distance between the two first busbars 21 is relatively long, and a short circuit caused by contact between the two first busbars 21 in a bending process when the distance between the two first busbars 21 is relatively short is avoided. In addition, the risk that the positive and negative interfaces of the battery module formed after the two first bus bars 21 are led out from the shell are mistakenly plugged due to the fact that the positive and negative interfaces are close to each other is avoided.

In the embodiment of the present application, the first bus bar segments 211 of the positive bus bar 21a and the negative bus bar 21b sequentially pass through the adapter plate and the tab heat sink 300, then enter the housing cover 400, and are connected to the housing cover 400 respectively. The positive electrode bus bar 21a and the negative electrode bus bar 21b are connected to an external circuit by drawing the positive electrode tab and the negative electrode tab of the battery module out of the case cover 400 via a connector on the case cover 400 to form a circuit. Because the first bus bar sections 211 of the positive bus bar 21a and the negative bus bar 21b are softer bus bars, a part of the first bus bar sections 211 can be bent and attached to the surface of the tab radiator 300, so that the contact area between the tab radiator 300 and the first bus bar sections 211 is larger, and the heat of the battery cell is transferred to the tab radiator 300 through the first bus bar sections 211 of the positive bus bar 21a and the negative bus bar 21b, which is beneficial to reducing the temperature of the battery cell.

As shown in fig. 1a, the tab heat sink 300 may include a heat dissipation bottom wall and an annular heat dissipation sidewall, at least one heat dissipation hole 302 may be disposed in the tab heat sink 300, and each heat dissipation hole 302 penetrates through two opposite heat dissipation sidewalls. The heat dissipation holes 302 facilitate external air to enter the heat dissipation holes 302 from the side surfaces of the tab radiator 300, and take away heat conducted from the tabs of the battery cells to the tab radiator 300; heat dissipation hole 302 link up two heat dissipation lateral walls of utmost point ear radiator 300, help forming the passageway of circulation of air in heat dissipation hole 302, in the both sides face of air from utmost point ear radiator 300 can all enter into heat dissipation hole 302, realize that the air circulates fast in heat dissipation hole 302, takes away the heat of conduction for utmost point ear radiator 300, improves the radiating efficiency.

In addition, a plurality of heat dissipation fins 303 may be further disposed in the heat dissipation hole 302, and the heat dissipation fins 303 may increase the heat dissipation area of the tab heat sink 300, so as to accelerate heat dissipation and improve the heat dissipation effect.

The positive electrode bus bar 21a and the negative electrode bus bar 21b are connected to the case cover 400 after passing through the through holes of the tab heat sink 300. The via holes penetrate through the tab heat sink 300 along the direction from the electric core set to the case cover 400, and are isolated from the heat dissipation fins 303 and the heat dissipation holes 302. To prevent the positive electrode bus bar 21a and the negative electrode bus bar 21b from contacting other external structures to cause short circuits.

Specifically, the battery management system 500 may be disposed on an inner wall of the housing cover 400, and the component device of the battery management system 500 has a certain height, so that the space 301 may be disposed on a side of the tab heat sink 300 facing the component device, and the space 301 is disposed opposite to the component device. The space-avoiding part 301 can be located on the side of the heat dissipation fin 303 facing away from the electric core group. Thus, the damage of components caused by collision with the tab radiator 300 when the shell cover 400 is covered is avoided. The components and the clearance 301 can be in contact with each other to facilitate heat dissipation of the components or have a certain gap to form a good clearance. Portions of the positive electrode bus bar 21a and the negative electrode bus bar 21b may be attached to the surface of the escape portion 301 and the surface of the battery management system 500. Thus, the space occupied by the positive electrode bus bar 21a and the negative electrode bus bar 21b can be reduced, and the wiring is more regular.

With continued reference to fig. 4-6, in this embodiment, the first bus bar 21 may further include: the reinforcing connector 213 connects the first busbar section 211 and the second busbar section 212 via the reinforcing connector 213. The reinforcing connection 213 may make the connection of the first bus bar segment 211 and the second bus bar segment 212 more stable.

For example, the first bus bar segment 211 is disposed at one end of the second bus bar segment 212 in the second direction, and the second bus bar segment 212 has a small thickness, so that the area where the second bus bar segment 212 can contact the first bus bar segment 211 is small, and if the first bus bar segment 211 is directly connected to the second bus bar segment 212, the connection between the first bus bar segment 211 and the second bus bar segment 212 may fail due to the low connection strength between the soft and hard bus bars. Therefore, the connection strength between the first and second bus bar segments 211 and 212 can be increased by increasing the connection area between the first and second bus bar segments 211 and 212.

For example, a reinforcing bar may be provided between the first bar section 211 and the second bar section 212, the reinforcing bar having a greater rigidity than the first bar section, i.e. the reinforcing connector 213 may be a rigid bar. The reinforced connecting member 213 includes a first connecting surface 2131 and a second connecting surface 2132, the first connecting surface 2131 is connected to the first bus bar segment 211, and the contact area between the first bus bar segment 211 and the first connecting surface 2131 can be set larger to increase the connection strength between the soft bus bar and the hard bus bar; the second connecting surface 2132 is connected to the second bus bar section 212, and although the contact area between the two is small, the reinforcing connecting member 213 and the second bus bar section 212 are both hard bus bars, and the connection strength is high.

As shown in fig. 3, in the present embodiment, the interposer 200 may further include a plurality of second busbars 22, and the plurality of second busbars 22 are disposed on the first surface 10a and arranged in an array. The positive electrode tab and the negative electrode tab positioned in the middle of the cell series line can be connected in series through the second bus bar 22 after protruding from the communication hole 11. For example, in the same column of cells, the positive tab of one cell and the negative tab of another cell of two adjacent cells may be connected in series via a second bus bar 22.

Specifically, the tab extends out of the first surface 10a after passing through the communication hole 11, and then the tab is bent and welded on the bus bar 20, so that the plate body 10 can provide a supporting force for tab welding. Because, the tabs of all the cells can be conveyed through the communication holes 11 and then extend out of the first surface 10a, and all the tabs can be bent at the same time, and then all the tabs can be welded at the same time. Therefore, the tab bending and welding operation is convenient, and the required time is short. Therefore, the production process of the battery module can be simplified, the production efficiency of the battery module is improved, and the assembly efficiency of the battery module is improved.

The extending direction of the second bus bar 22 may be the same as or different from the extending direction of the plate body 10.

The communication hole 11 may be disposed near the second bus bar 22, so that the tab is extended from the communication hole 11 and then is located at a short distance from the second bus bar 22, which is convenient for connection. The number of the communication holes 11 adjacent to each second bus bar 22 may be one, and two tabs connected to the same second bus bar 22 may pass through the same communication hole 11. In some examples, the number of the communication holes 11 adjacent to each second bus bar 22 may be two, so that two tabs connected to the same second bus bar 22 may pass through the two communication holes 11, respectively. Of course, the number of the communication holes 11 near each second bus bar 22 may also be other numbers. For example, in fig. 3, the number of the communication holes 11 near each second bus bar 22 is two, and the two communication holes 11 are respectively provided near opposite sides of the second bus bar 22 in the second direction.

In this embodiment, the plate body 10 may be provided with a plurality of limiting holes 12, the limiting holes 12 communicate with the first surface 10a and the second surface, each second bus bar 22 is provided with a limiting protrusion, and the limiting protrusions are inserted into the limiting holes 12 in a one-to-one correspondence manner. Like this, through spacing bellying and spacing hole 12 cooperation, can fix a position second busbar 22, when second busbar 22 is connected with plate body 10, need not to use positioning tool, easy operation is convenient.

The limiting protrusion on each second busbar 22 may be a protruding structure such as a convex ball and a pointed tip connected to the second busbar 22, or a protruding structure formed by an extending structure of the second busbar 22. The number of the limiting protrusions corresponding to each second busbar 22 may be 1, 2, 3, or 4, and the number of the limiting protrusions is not limited. Correspondingly, the number of the limiting holes 12 corresponding to each second bus bar 22 may also be 1, 2, 3, or 4, and the number of the limiting holes 12 is not limited.

In some embodiments, one of the limiting holes 12 is communicated with one of the communication holes 11, so that the communicated limiting hole 12 and the communication hole 11 can be manufactured into a common hole, and the limiting hole 12 and the communication hole 11 can be formed in one step, thereby simplifying the manufacturing process. The common hole can limit the second busbar 22 and can be used for a tab to pass through. In other examples, the limiting hole 12 and the communicating hole 11 may be two separate holes.

With continued reference to fig. 7 and 8, for example, the second bus bar 22 may include a third bus bar section 221 and a fourth bus bar section 222 connected to each other, and an extending direction of the third bus bar section 221 is parallel to the plate surface of the plate body 10, so that a contact area between the third bus bar section 221 and the plate body 10 is larger, which is beneficial for fixing the second bus bar 22. The fourth bus bar segment 222 is located on one side of the third bus bar segment 221 close to the second surface, and the fourth bus bar segment 222 forms a limit protrusion. The fourth bus bar segment 222 is located at least at one end of the third bus bar segment 221, i.e. the fourth bus bar segment 222 can be disposed on the end 1, the end 2, the end 3 or the end 4 of the third bus bar segment 221, which is not limited thereto. For example, in fig. 8, fourth bus bar segments 222 may be provided at opposite ends of the third bus bar segment 221.

As shown in fig. 3, series connection of cells in the same column may be performed by the second bus bar 22, and when a plurality of cells are stacked in a plurality of columns, series connection of cells between two adjacent columns may be performed by the internal connection bus bar 23. Because the distance between the tabs on the two adjacent columns of cells is relatively long, the internal connecting bus bar 23 can be arranged to be longer than the second bus bar 22, so as to complete the connection. Wherein the inner connecting bus bar 23 is disposed between partially adjacent second bus bars 22.

When the battery module assembles, in the casing, pile up into at least one with a plurality of electric cores, then arrange adapter plate 200 in one side of electric core group utmost point ear, the utmost point ear of a plurality of electric cores all passes intercommunicating pore 11 to after the first surface 10a of plate body 10 buckles, weld simultaneously on each busbar 20 of adapter plate 200, in order to establish ties a plurality of electric cores together. Because the multiple busbars are integrated on the adapter plate, the automatic production is facilitated, and the consistency and the reliability of products are improved.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the present invention.

Claims (11)

1. An adapter plate is characterized by being used for connecting a tab and busbars, and comprises a plate body and busbars, wherein the busbars comprise at least one first busbar, the plate body comprises a first surface and a second surface which are oppositely arranged, the first busbars are arranged on the first surface, communication holes for communicating the first surface with the second surface are formed in the plate body, and the tab is provided with a through hole for the second surface to penetrate through to the first surface;

the first busbar comprises a first busbar section and a second busbar section which are connected with each other, the hardness of the first busbar section is smaller than that of the second busbar section, and the second busbar section is close to the communication hole and connected with the lug.

2. The interposer as recited in claim 1, wherein the first buss bar further comprises: and the first busbar section is connected with the second busbar section through the reinforced connecting piece.

3. The interposer as recited in claim 2, wherein the reinforcing connector is a reinforcing busbar that is stiffer than the first busbar segment, the reinforcing connector including a first connection face and a second connection face, the first connection face being connected to the first busbar segment and the second connection face being connected to the second busbar segment.

4. The interposer as recited in any one of claims 1-3, further comprising: and the second busbars are arranged on the first surface and are arranged in an array.

5. The adapter plate according to claim 4, wherein the plate body is provided with a plurality of limiting holes, the limiting holes communicate with the first surface and the second surface, and the limiting holes communicate with the communication holes;

each second busbar is provided with a limiting protruding part, and the limiting protruding parts are inserted into the limiting holes in a one-to-one corresponding mode.

6. A battery module, comprising at least: the shell cover and the bottom shell, the electric core group and the adapter plate of any one of the claims 1 to 5, wherein an opening is formed in one end of the bottom shell, the shell cover is arranged at one end of the opening of the bottom shell, the electric core group and the adapter plate are positioned in the bottom shell, and the adapter plate is positioned between the electric core group and the shell cover;

the battery core group comprises a plurality of battery cores which are arranged in a stacked mode, and the battery cores are all electrically connected through the adapter plate.

7. The battery module according to claim 6, wherein a positive tab and a negative tab extending towards the housing cover are disposed at one end of each of the battery cells facing the housing cover, and the positive tab and the negative tab are respectively inserted into the communication holes of the interposer and connected to the bus bar of the interposer.

8. The battery module according to claim 7, further comprising: the lug radiator is located the cap with between the keysets, the first busbar of keysets includes anodal busbar and negative bus bar, anodal busbar with the negative bus bar passes in proper order the keysets with get into behind the lug radiator the cap, and with the cap links to each other.

9. The battery module according to claim 8, wherein the case cover is folded to cover the tab radiator, and the case cover is covered at the open end of the bottom case through the tab radiator.

10. The battery module as recited in claim 8, wherein a battery management system is disposed on an inner wall of the housing cover, a space opposing a component of the battery management system is disposed on the tab heat sink, and a portion of the positive bus bar and the negative bus bar is attached to a surface of the space and a surface of the battery management system.

11. The battery module according to claim 8, wherein a plurality of heat dissipation fins are provided in the tab heat sink, each heat dissipation fin extends along the thickness direction of the bottom case, and the positive bus bar and the negative bus bar are connected to the case cover after passing through the through holes of the tab heat sink;

the through hole is followed the electric core group extremely the direction of cap runs through utmost point ear radiator, just the through hole with radiating fin keeps apart.

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