CN219457891U - Battery assembly - Google Patents

Abstract

The application provides a battery pack, which comprises a housin, battery module and BMS board, the casing has the holding chamber, battery module sets up in the holding chamber, BMS board sets up in battery module's top, battery module includes electric core main part and utmost point ear support, electric core main part's tip is equipped with first utmost point ear and second utmost point ear, utmost point ear support includes support main part and busbar, first utmost point ear is connected with the BMS board, the second utmost point ear is connected with the busbar, thereby space utilization in the BMS board has been improved, production process step has been simplified, manufacturing cost has been reduced.

Description

Battery assembly

Technical Field

The application relates to the technical field of batteries, in particular to a battery assembly.

Background

With the development of economy and the progress of society and the continuous improvement of the living standard of people, the peak-valley difference presented by the load curve is bigger and bigger, which also causes the unbalance of the supply and the demand of the power system. In addition, with the shortage of global energy supply and the change of global climate and environmental pollution, more and more countries recognize the importance of new energy, and new energy is being developed.

In the related art, chemical energy storage mainly refers to storage battery energy storage, and a storage battery energy storage system (Battery Energy Storage System, BESS) is the energy storage system with the widest range, and has the advantages of low cost, mature technology, high charge and discharge multiple and good modularity, and can be used as a distributed energy storage device. Battery management systems (Battery Management System, BMS) are typically provided in battery energy storage systems for managing and maintaining the battery cells, while circuit boards in the BMS may be connected to the tabs and poles of the cells through copper bars.

However, the structure and connection mode of the copper bars in the existing storage battery energy storage system lead to low space utilization rate of the BMS, complex structure and high production cost.

Disclosure of Invention

In view of the above problems, embodiments of the present application provide a battery assembly, so as to solve the technical problems that the BMS space utilization ratio is low, the structure is complex, and the production cost is high due to the structure and the connection mode of the copper bars in the current storage battery energy storage system.

In order to achieve the above-mentioned purpose, this application provides a battery pack, and this battery pack includes casing, battery module and BMS board, and the casing has the accommodation chamber, and battery module sets up in the accommodation chamber, and BMS board sets up in battery module's top.

The battery module comprises a battery core main body and a tab support, wherein a first tab and a second tab are arranged at the end part of the battery core main body, the tab support comprises a support main body and a bus bar, the first tab is connected with a BMS plate, and the second tab is connected with the bus bar.

The battery pack provided by the application is improved in a connection mode of the lugs and the BMS plates, so that the BMS plates are connected with the lugs of the battery cells, the space utilization rate in the BMS plates is improved, the production process steps are simplified, and the production cost is reduced.

As an alternative embodiment, the battery pack may further include a connection member, the connection member may include a first connection member connected with the BMS board, and the first tab may be vertically disposed at the top of the battery cell main body, and the first connection member is welded with the first tab.

By the arrangement, the bending step of the first tab can be reduced, the production efficiency is improved, and the production cost is reduced.

As an alternative embodiment, the first connection member may include a first connection section, a second connection section, and a third connection section, the first connection section may be welded with the surface of the control board, and the first connection section may be vertically disposed with respect to the surface of the control board; the second connecting section can be connected with the first connecting section, and the second connecting section bends towards the first tab relative to the first connecting section; the third linkage segment can be connected with the second linkage segment, and the third linkage segment can be on a parallel with first utmost point ear setting, and the lateral wall of third linkage segment can laminate with the side of first utmost point ear.

So set up, can guarantee the roughness of first connecting piece and first utmost point ear surface contact, reduce the welding degree of difficulty between them, improve welding quality.

As an alternative embodiment, the BMS plate may be disposed at a side of the tab support facing away from the battery cell main body; the tab support is provided with a protruding portion, the first connecting section and the third connecting section are respectively located at two opposite sides of the protruding portion, and the second connecting section is supported at the top of the protruding portion.

So set up, can improve the stability that first connecting piece connects, guarantee the connection reliability of first connecting piece and first utmost point ear simultaneously.

As an alternative embodiment, the side wall of the third connecting section may have a gap with the side wall of the projection, the gap having a size of 0.1mm-0.2mm.

So set up, when first connecting piece and first utmost point ear welding, can reduce the produced stress of first connecting piece, and then reduce the stress that BMS board received.

As an alternative embodiment, the BMS board includes a logic control board and a power board, the power board is connected with the tab bracket, and the logic control board is connected to one side of the power board away from the tab bracket; the first connecting piece is connected with the power panel.

So set up, can improve the space utilization on the board of BMS board.

As an alternative embodiment, the connector may further include a second connector, and the first connector and the second connector are welded to opposite sides of the power panel, respectively; the end of the battery core main body is provided with a pole, and the second connecting piece is electrically connected with the pole.

So set up, can increase the radiating area of connecting piece to improve the radiating effect of BMS board.

As an alternative embodiment, the second connection member may include a fourth connection section and a fifth connection section, the fourth connection section may be vertically disposed with respect to a surface of the power panel, and the fifth connection section may be connected with the fourth connection section, and the fifth connection section may extend toward an outside of the power panel in a horizontal direction.

So set up, improve the convenience and the reliability that the second connecting piece is connected with the utmost point post.

As an alternative embodiment, the housing may include a lower housing for forming the receiving chamber and an upper housing cover disposed above the BMS plate, and the upper housing may be connected with the lower housing, the BMS plate may be disposed at one end of the battery module facing the upper housing.

By the arrangement, the space utilization rate of the shell can be increased, and the efficiency of the assembly process of the battery assembly is improved.

As an alternative implementation manner, the battery module may further include a shunt, the shunt is disposed on the tab support, the shunt may be provided with pins, the BMS board has a jack, the pins are plugged into the jack, and the pins may be soldered to the jack; the tab may further include a negative tab, and the shunt is electrically connected to the negative tab.

So set up, can improve the space utilization of BMS board when guaranteeing shunt and BMS board connection reliability.

The battery pack that this application provided includes casing, battery module and BMS board, the casing has the holding chamber, battery module sets up in the holding chamber, BMS board sets up in battery module's top, battery module includes electric core main part and utmost point ear support, battery core main part's tip is equipped with first utmost point ear and second utmost point ear, utmost point ear support includes support main part and busbar, first utmost point ear is connected with the BMS board, the second utmost point ear is connected with the busbar to space utilization in the BMS board has been improved, production process step has been simplified, manufacturing cost has been reduced.

In addition to the technical problems, features constituting the technical solutions, and advantageous effects brought about by the technical features of the technical solutions described above, other technical problems that can be solved by the battery assembly provided by the present application, other technical features included in the technical solutions, and advantageous effects brought about by the technical features will be described in further detail in the detailed description of the present application.

Drawings

In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, a brief description will be given below of the drawings that are needed in the embodiments or the prior art descriptions, and it is obvious that the drawings in the following description are some embodiments of the present application, and that other drawings can be obtained according to these drawings without inventive effort for a person skilled in the art.

Fig. 1 is an exploded view of a battery assembly provided in an embodiment of the present application;

fig. 2 is a schematic structural diagram of a battery module in a battery assembly according to an embodiment of the present disclosure;

fig. 3 is a schematic structural view of a tab support in a battery assembly according to an embodiment of the present disclosure;

fig. 4 is an assembly schematic diagram of a battery module in a housing in a battery assembly according to an embodiment of the present disclosure;

FIG. 5 is a front view of FIG. 4;

FIG. 6 is a cross-sectional view taken along the direction A-A in FIG. 5;

FIG. 7 is a partial view of the position B of FIG. 6;

fig. 8 is a schematic view of a BMS board in a battery pack according to an embodiment of the present application;

fig. 9 is a side view of a BMS board in a battery pack according to an embodiment of the present application;

fig. 10 is a schematic diagram of a BMS board in a battery module according to an embodiment of the present disclosure;

fig. 11 is an exploded view of a BMS board in a battery pack according to an embodiment of the present application;

fig. 12 is a schematic structural view of a first connector in a battery assembly according to an embodiment of the present disclosure;

fig. 13 is a side view of a first connector in a battery assembly provided in an embodiment of the present application;

fig. 14 is a schematic structural view of a second connector in the battery assembly according to the embodiment of the present application;

fig. 15 is a side view of a second connector in a battery assembly provided in an embodiment of the present application;

fig. 16 is a schematic diagram illustrating cooperation between a current divider and a BMS board in a battery module according to an embodiment of the present application.

Reference numerals illustrate:

100-a housing; 101-a receiving chamber; 110-an upper housing; 120-a lower housing; 130-a second fastener;

200-battery module; 210-a cell body; 211-a first tab; 212-pole; 220-tab support; 221-a projection; 230-a shunt; 231-pin;

300-BMS board; 301-jack; 311-power panel; 312-logic control board; 320-connecting piece; 321-a first connector; 3211-a first connection segment; 3212-a second connecting segment; 3213-a third connecting segment; 322-a second connector; 3221-fourth connecting segments; 3222-fifth connecting segment; 330-first fastener.

Detailed Description

For the purposes of making the objects, technical solutions and advantages of the present application more apparent, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present application, and it is apparent that the described embodiments are some embodiments of the present application, but not all embodiments. All other embodiments, which can be made by one of ordinary skill in the art without undue burden from the present disclosure, are within the scope of the present disclosure.

With the development of economy and the progress of society and the continuous improvement of the living standard of people, the peak-valley difference presented by the load curve is bigger and bigger, which also causes the unbalance of the supply and the demand of the power system. Because the power generation, the power transmission, the transformation, the distribution and the power utilization of the power system are continuously carried out, the electric energy is balanced at all times. The peak power shortage has serious influence on the normal life of local residents and the development of local economic industry, and restricts the development of social economy. In contrast, the off-peak load brings difficulty to the stability control of the power system on one hand, and on the other hand, resource waste is caused, a large number of power equipment and the like are idle in the system, and the capacity of the equipment is not fully utilized, so that the running economy of the system is reduced. Of course, some large peak shaving power plants and pumped storage power stations are also built in the system, but the peak shaving cost is higher, the equipment utilization rate is low, the resource waste is caused, and the power generation cost is further improved.

In addition, with the shortage of global energy supply and the change of global climate and environmental pollution, more and more countries recognize the importance of new energy, and new energy power generation, especially wind power generation, photovoltaic power generation, and the like, is being greatly developed. Because of the advantages of small environmental pollution and inexhaustible environmental pollution in development and utilization, solar power generation, wind power generation and other clean energy power generation are greatly concerned. However, the renewable energy source power generation has the characteristics of fluctuation and randomness, and wind energy and solar energy are greatly influenced by weather conditions and geographical environments, so that the large-scale grid connection of wind power also brings about a plurality of defects. The fluctuation of the output power seriously threatens the stability and the safety of a power system, the power dispatching department is aggravated by the increase of the specific gravity of wind power, the frequency modulation peak shaving pressure is increased, and meanwhile, the power quality of a power grid is reduced due to the fluctuation of power and frequency. In addition, wind power generation areas are quite concentrated, wind energy resources are mainly distributed in coastal and plateau areas, and therefore operation cost is increased due to long-distance power transmission.

The chemical energy storage mainly refers to storage battery energy storage, and the storage battery energy storage system (Battery Energy Storage System, BESS) is the energy storage system with the widest range, and has the advantages of low cost, mature technology, high charge and discharge times and good modularity, and can be used as a distributed energy storage device. Battery management systems (Battery Management System, BMS) are typically provided in battery energy storage systems for managing and maintaining the battery cells, while circuit boards in the BMS may be connected to the tabs and posts 212 of the battery cells through copper bars. However, the structure and connection mode of the copper bars in the existing storage battery energy storage system lead to low space utilization rate of the BMS, complex structure and high production cost.

The application provides a battery pack, through the improvement to tab and BMS board connected mode for the tab need not to bend alright be connected with the BMS board, reduces the occupation to BMS's on-board space, has improved BMS space utilization, has simplified the pencil connected mode of shunt, has reduced the pencil and has used, has reduced manufacturing cost.

The battery pack according to the embodiment of the present application is described below with reference to the accompanying drawings. It should be noted that, the battery assembly provided in the embodiment of the present application may be charged and discharged and recycled, and specific types of the battery assembly may include, but are not limited to, a storage battery, a lithium battery, etc., and the battery assembly and the battery pack may be used in a scenario including, but not limited to, an electronic product, an energy storage device, a vehicle, etc., such as a new energy automobile, etc., which is not specifically limited in this embodiment of the present application.

Fig. 1 is an exploded view of a battery assembly provided in an embodiment of the present application, fig. 2 is a schematic structural view of a battery module in the battery assembly provided in an embodiment of the present application, fig. 3 is a schematic structural view of a tab support in the battery assembly provided in an embodiment of the present application, fig. 4 is an assembled schematic view of the battery module in a housing in the battery assembly provided in an embodiment of the present application, fig. 5 is a front view of fig. 4, fig. 6 is a sectional view in A-A direction in fig. 5, and fig. 7 is a partial view in a B position in fig. 6.

Referring to fig. 1 to 7, the battery assembly of the embodiment of the present application includes a housing 100, a battery module 200 and a BMS board 300, wherein the housing 100 is used for protecting the battery module 200, the battery module 200 is used for storing electric energy, and the battery module 200 can input and output electric energy, the BMS board 300 is used for managing and maintaining the battery module 200, monitoring the state of the battery module 200, and prolonging the service life of the battery assembly.

Wherein, the housing 100 has a receiving cavity 101, the battery module 200 may be disposed in the receiving cavity 101, and the BMS plate 300 is disposed at the top of the battery module 200, and the BMS plate 300 and the battery module 200 may be electrically connected in the process of packaging, packaging and assembling the battery module.

In some embodiments, the battery module 200 includes a battery cell main body 210 and a tab support 220, the end of the battery cell main body 210 is provided with a first tab 211 and a second tab, the tab support includes a support main body and a busbar, the busbar may be an aluminum bar, etc., the second tab is connected with the busbar, and the first tab 211 is connected with a BMS board, so that a plurality of battery cells of the battery cell main body 210 form a loop.

The battery assembly may further include a connecting member, wherein the connecting member 320 plays a role in electrical connection between the BMS board 300 and the first tab 211 and the second tab, and the connecting member 320 may be made of copper, aluminum or other conductive metals or alloys, for example, the connecting member 320 may be a copper bar, and the connecting member 320 may be connected with the BMS board 300 by welding.

It should be noted that, in the battery assembly provided in this embodiment of the present application, by improving the setting mode of the connection piece 320 on the BMS board 300, the connection piece 320 is connected with the tab of the battery core, which improves the space utilization rate in the BMS board 300, simplifies the production process steps, and reduces the production cost.

In addition, the BMS board 300 in the embodiment of the present application functions as a battery management system (Battery Management System, BMS), i.e., the BMS board 300 may be equivalent to a BMS, and a detailed description thereof will be omitted hereinafter.

The specific connection manner of the connector 320 and the tab, and the specific structure of the connector 320 will be described in detail.

Fig. 8 is a schematic structural diagram of a BMS board in a battery assembly provided in an embodiment of the present application, fig. 9 is a side view of a BMS board in a battery assembly provided in an embodiment of the present application, fig. 10 is a schematic structural diagram of a BMS board in a battery assembly provided in an embodiment of the present application, and fig. 11 is an exploded view of a BMS board in a battery assembly provided in an embodiment of the present application.

One of the first tab 211 and the second tab may be an anode tab, the other may be a cathode tab, and the first tab 211 is taken as the anode tab and the second tab is taken as the cathode tab for description, which will not be repeated.

Referring to fig. 1 to 11, in one possible implementation manner, the first tab 211 and the second tab may respectively function as a positive electrode and a negative electrode of the battery cell body 210, wherein the first tab 211 may be directly electrically connected to the BMS board 300 through the connection member 320, and the first tab 211 will be described as an example.

It can be appreciated that the connecting piece 320 may include a first connecting piece 321, the first tab 211 may be vertically disposed at the top of the battery core main body 210, the first connecting piece 321 is located at a side of the first tab 211, and the first connecting piece 321 is welded with a surface of the first tab 211, so that a bending step of the first tab 211 may be reduced, production efficiency is improved, and production cost is reduced.

For example, the first tab 211 may be in a vertically disposed sheet shape, and the first tab 211 vertically extends to a side of the BMS board 300 at the top of the battery cell body 210, and a side of the first connector 321 facing the first tab 211 may be welded with a side wall of the first tab 211.

It should be noted that, the first tab 211 that is vertically disposed may omit a bending process, that is, when the BMS board 300 is assembled, the first connecting piece 321 and the first tab 211 may be directly welded, and in order to ensure the reliability of the welding between the first connecting piece 321 and the first tab 211, the side wall of the first connecting piece 321 and the side wall of the first tab 211 may be disposed in parallel, so that the first connecting piece 321 and the first tab 211 have a sufficiently large welding area, and ensure the reliability of the welding, and further ensure the reliability of the electrical connection.

Fig. 12 is a schematic structural diagram of a first connector in a battery assembly according to an embodiment of the present application, and fig. 13 is a side view of the first connector in the battery assembly according to an embodiment of the present application.

Referring to fig. 2 to 13, in some embodiments, the first connection piece 321 may include a first connection section 3211, a second connection section 3212, and a third connection section 3213, the first connection section 3211 may be welded to a surface of the BMS board 300, the first connection section 3211 may be vertically disposed with respect to the surface of the BMS board 300, the second connection section 3212 may be connected to the first connection section 3211, and the second connection section 3212 is bent toward the first tab 211 with respect to the first connection section 3211; the third connection section 3213 may be connected to the second connection section 3212, and the third connection section 3213 may be disposed parallel to the first tab 211, and a side wall of the third connection section 3213 may be attached to a side surface of the first tab 211.

It can be appreciated that the first connection section 3211 is vertically arranged and welded with the BMS board 300, so that the space on the BMS board 300 can be saved, the space utilization rate on the BMS board 300 is increased, the second connection section 3212 extends the first connection piece 321 to the outer side of the BMS board 300, and then the third connection section 3213 can be attached to the side of the first tab 211, thereby ensuring the flatness of the surface contact between the first connection piece 321 and the first tab 211, reducing the welding difficulty of the first connection piece 321 and the first tab 211, and improving the welding quality.

For example, the first connection segment 3211, the second connection segment 3212 and the third connection segment 3213 may be integrally formed by bending, where the first connection segment 3211 is vertically disposed, the second connection segment 3212 may extend along a horizontal direction, and the third connection segment 3213 is parallel to a side wall of the first tab 211, that is, the third connection segment 3213 is disposed along a vertical manner, so that a cross-sectional shape of the first connection member 321 may be in a "U" shape, and specific dimensions of the first connection segment 3211, the second connection segment 3212 and the third connection segment 3213 are not limited in this embodiment.

In one possible implementation, the BMS board 300 may be disposed at a side of the tab support 220 facing away from the battery cell body 210, the tab support 220 may be provided with a protrusion 221, the first connection segment 3211 and the third connection segment 3213 are respectively located at opposite sides of the protrusion 221, and the second connection segment 3212 is supported at the top of the protrusion 221.

It can be appreciated that the protrusion 221 can provide a limiting and supporting force for the first connector 321, so as to avoid the lower layer of the first connector 321, thereby improving the connection stability of the first connector 321, and simultaneously ensuring the connection reliability of the third connection segment 3213 of the first connector 321 and the first tab 211, and simultaneously ensuring the connection reliability of the first connection segment 3211 of the first connector 321 and the BMS board 300.

In some embodiments, the side wall of the third connection segment 3213 may have a gap with the side wall of the protrusion 221, the third connection segment 3213 extends between the protrusion 221 and the first tab 211, the side wall of the protrusion 221 may be parallel to the side wall of the first tab 211, one side surface of the third extension segment is welded to the side wall of the first tab 211, and the other side surface may maintain a certain gap with the protruding side wall.

Illustratively, the side wall of the third connection section 3213 may have a side wall gap with the protrusion 221 of 0.1mm-0.2mm, including but not limited to 0.1mm, 0.11mm, 0.15mm, 0.19mm, 0.2mm, etc., so that the stress generated by the first connection member 321 may be reduced when the first connection member 321 is welded with the first tab 211, thereby reducing the stress to which the BMS plate 300 is subjected. The specific values of the dimensions of the sidewall gap between the sidewall of the third connecting section 3213 and the sidewall of the protrusion 221 are not limited in the embodiments of the present application.

In one possible implementation, the BMS board 300 may include a power board 311 and a logic control board 312, the power board 311 may be connected with the tab support 220, the logic control board 312 may be disposed at a side of the power board 311 facing away from the tab support 220, and the connector 320 may be disposed between the power board 311 and the logic control board 312.

It may be appreciated that the power board 311 and the logic control board 312 are disposed in a vertically stacked manner and are parallel to each other with a space therebetween, and the power board 311 and the logic control board 312 may have different functions and may be electrically connected to each other, for example, the power board 311 may be a power function board and the logic control board 312 may be a logic board. The connector 320 may be connected to the power panel 311, and an end edge of the connector 320 may be welded to the power panel 311, thereby improving space utilization on the board of the BMS board 300.

Fig. 14 is a schematic structural diagram of a second connector in a battery assembly according to an embodiment of the present application, and fig. 15 is a side view of the second connector in the battery assembly according to an embodiment of the present application.

Referring to fig. 2 to 15, in some embodiments, the connector 320 may further include a second connector 322, the first connector 321 and the second connector 322 are welded to opposite sides of the power board 311, the end of the battery main body 210 is provided with a pole 212, and the second connector 322 may be electrically connected to the pole 212.

It can be appreciated that the first and second connection members 321 and 322 are disposed in such a manner as to increase the heat dissipation area of the connection member 320, thereby improving the heat dissipation effect of the BMS board 300.

For example, the second connecting member 322 may include a fourth connecting section 3221 and a fifth connecting section 3222, the fourth connecting section 3221 may be disposed vertically with respect to the surface of the power board 311, the fifth connecting section 3222 may be connected to the fourth connecting section 3221, and the fifth connecting section 3222 may extend toward the outside of the power board 311 along the horizontal direction, so as to improve the convenience and reliability of the connection of the second connecting member 322 with the pole 212. The fourth connecting section 3221 and the power panel 311 can be welded and connected, for example, by means of laser welding, the panel surface of the fifth connecting section 3222 has a larger size, so that a good heat dissipation effect is achieved, and the fifth connecting section 3222 and the pole 212 are connected, so that a good supporting effect can be achieved on the second connecting piece 322, and the connection reliability of the second connecting piece 322 and the power panel 311 is guaranteed.

It should be noted that, the BMS board 300 may be connected to the tab support 220 through the first fastener 330, the first fastener 330 may be a threaded fastener such as a screw or a bolt, the first fastener 330 may be a plurality of fasteners, and the plurality of first fasteners 330 may be connected to corner positions of the power board 311.

In one possible implementation, the case 100 may include a lower case 120 and an upper case 110, the lower case 120 is used to form the receiving chamber 101, the BMS plate 300 may be disposed at one end of the battery module 200 facing the upper case 110, the upper case 110 is covered over the BMS plate 300, and the upper case 110 may be connected with the lower case 120, so that the space utilization of the case 100 may be increased, and the efficiency of the assembly process of the battery assembly may be improved.

It will be appreciated that the upper case 110 and the lower case 120 may be fixed by the second fastener 130 when assembled, the second fastener 130 may be a threaded fastener such as a screw or a bolt, and the edge where the upper case 110 and the lower case 120 are butted may be coated with sealant, so that good sealing performance is ensured when the upper case 110 and the lower case 120 are packaged, and the second fastener 130 may be connected to the corner where the upper case 110 and the lower case 120 are butted.

Fig. 16 is a schematic diagram illustrating cooperation between a current divider and a BMS board in a battery module according to an embodiment of the present application.

Referring to fig. 16, referring to fig. 1 to 11 in combination, in some embodiments, the battery module 200 may further include a shunt 230, the shunt 230 is disposed on the tab support 220, a pin 231 may be disposed on the shunt 230, the BMS board 300 has a jack 301, the pin 231 is plugged into the jack 301, and the pin 231 may be soldered to the jack 301, the tab may further include a negative electrode tab, and the shunt 230 is electrically connected to the negative electrode tab, so that the space utilization of the BMS board 300 may be improved while the connection reliability of the shunt 230 and the BMS board 300 is ensured.

It should be noted that, when the battery assembly provided in this embodiment of the present application is assembled, stacking of the battery core main body 210 may be completed first, and assembling of the tab support 220 may be completed on the battery core main body 210, since the current divider 230 is integrated with the tab support 220, assembling of the current divider 230 is completed at this time, after that, assembling the connection member 320, bending and welding of the negative electrode tab are performed, and the battery module 200 is installed into the accommodating cavity 101 of the housing 100, then, assembling of the BMS board 300 is performed, welding of the first connection member 321 and the first tab 211 of the BMS board 300 is performed, and the pin 231 is matched with the insertion hole 301 and soldered, and finally, assembling of the upper housing 110 and the lower housing 120 is completed.

The battery pack that this application provided includes casing, battery module and BMS board, the casing has the holding chamber, battery module sets up in the holding chamber, BMS board sets up in battery module's top, battery module includes electric core main part and utmost point ear support, battery core main part's tip is equipped with first utmost point ear and second utmost point ear, utmost point ear support includes support main part and busbar, first utmost point ear is connected with the BMS board, the second utmost point ear is connected with the busbar to space utilization in the BMS board has been improved, production process step has been simplified, manufacturing cost has been reduced.

In the description of the present application, it should be noted that, unless explicitly stated and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be fixedly connected, or indirectly connected through intermediaries, for example, or may be in communication with each other between two elements or in an interaction relationship between two elements. The specific meaning of the terms in this application will be understood by those of ordinary skill in the art as the case may be.

In the description of the present application, it should be understood that the terms "upper," "lower," "front," "rear," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like indicate orientations or positional relationships based on the orientations or positional relationships illustrated in the drawings, merely to facilitate description of the present application and simplify the description, and do not indicate or imply that the devices or elements being referred to must have a specific orientation, be configured and operated in a specific orientation, and are therefore not to be construed as limiting the present application.

The terms "first," "second," "third," "fourth" and the like in the description and in the claims of this application and in the above-described figures, if any, are used for distinguishing between similar objects and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used may be interchanged where appropriate such that embodiments of the present application described herein may be capable of operation in sequences other than those illustrated or described herein, for example.

Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.

Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present application, and not for limiting the same; although the present application has been described in detail with reference to the foregoing embodiments, it should be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some or all of the technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit of the corresponding technical solutions from the scope of the technical solutions of the embodiments of the present application.

Claims (10)

1. The battery assembly is characterized by comprising a shell, a battery module and a BMS plate, wherein the shell is provided with a containing cavity, the battery module is arranged in the containing cavity, and the BMS plate is arranged at the top of the battery module;

the battery module comprises a battery core main body and a tab support, wherein a first tab and a second tab are arranged at the end part of the battery core main body, the tab support comprises a support main body and a bus bar, the first tab is connected with the BMS board, and the second tab is connected with the bus bar.

2. The battery pack of claim 1, further comprising a connection member including a first connection member connected with the BMS board; the first tab is vertically arranged at the top of the battery cell main body, and the first connecting piece is welded with the first tab.

3. The battery pack according to claim 2, wherein the BMS board comprises a logic control board and a power board, the power board is connected with the tab bracket, and the logic control board is connected to a side of the power board facing away from the tab bracket; the first connecting piece is connected with the power panel.

4. The battery assembly of claim 3, wherein the first connector comprises a first connector section, a second connector section, and a third connector section, the first connector section being welded to and disposed vertically relative to a surface of the control board; the second connecting section is connected with the first connecting section, and the second connecting section is bent towards the first tab relative to the first connecting section; the third connecting section is connected with the second connecting section, the third connecting section is parallel to the first tab, and the side wall of the third connecting section is attached to the side face of the first tab.

5. The battery pack of claim 4, wherein the BMS board is disposed at a side of the tab support facing away from the cell main body; the tab support is provided with a protruding portion, the first connecting section and the third connecting section are respectively located on two opposite sides of the protruding portion, and the second connecting section is supported at the top of the protruding portion.

6. The battery assembly of claim 5, wherein the side wall of the third connecting section has a gap with the side wall of the protrusion, the gap having a size of 0.1mm to 0.2mm.

7. The battery assembly of any one of claims 3-6, wherein the connector further comprises a second connector, the first and second connectors being welded to opposite sides of the power panel, respectively; the end part of the battery cell main body is provided with a pole, and the second connecting piece is electrically connected with the pole.

8. The battery assembly of claim 7, wherein the second connector includes a fourth connection section and a fifth connection section, the fourth connection section is disposed vertically with respect to a surface of the power panel, the fifth connection section is connected with the fourth connection section, and the fifth connection section extends outward of the power panel in a horizontal direction.

9. The battery pack according to any one of claims 1 to 6, wherein the housing includes a lower housing for forming the receiving chamber and an upper housing, the BMS plate is disposed at an end of the battery module facing the upper housing, the upper housing is covered over the BMS plate, and the upper housing is connected with the lower housing.

10. The battery assembly of any one of claims 1-6, wherein the battery module further comprises a shunt disposed in the tab support, the shunt having a pin, the BMS board having a socket, the pin being plugged into the socket, and the pin being welded to the socket.