CN220544165U

CN220544165U - Battery pack

Info

Publication number: CN220544165U
Application number: CN202322021775.4U
Authority: CN
Inventors: 朱列群; 张耀升; 胡世超; 黎梓骞; 赖庆
Original assignee: BYD Co Ltd
Current assignee: BYD Co Ltd
Priority date: 2023-07-26
Filing date: 2023-07-26
Publication date: 2024-02-27
Anticipated expiration: 2033-07-26

Abstract

The application discloses a battery pack, which comprises a tray, a sealing cover for sealing the tray, and a plurality of working units, wherein the working units are positioned in the tray, the two working units are electrically connected through two buses, and a connecting structure is formed at the joint of the two buses; the tray is provided with a supporting piece, and at least two connecting structures are positioned on one side of the supporting piece, which faces the sealing cover. The scheme that this application provided has the characteristics of being convenient for connect.

Description

Battery pack

Technical Field

The application belongs to the technical field of automobiles, and particularly relates to a battery pack.

Background

In the prior art, the electrical connection between the battery modules in the battery pack is generally achieved by screwing or welding in the Y direction. In the Y-direction operation, the screws are easily inclined or are inconvenient to weld, so that poor connection is caused.

Disclosure of Invention

An object of the embodiment of the application is to provide a battery pack, and the battery pack that this application provided can solve the inconvenient problem of electric connection between the battery module.

According to a first aspect of embodiments of the present application, there is provided a battery pack, including a tray, a sealing cover sealing the tray, and a plurality of working units, wherein the plurality of working units are located in the tray, the two working units are electrically connected through two bus bars, and a connection structure is formed at a connection position of the two bus bars;

the tray is provided with a supporting piece, and at least two connecting structures are positioned on one side of the supporting piece, which faces the sealing cover.

Optionally, the number of the connecting structures is plural, and at least 50% or more of the connecting structures are located on a side of the support member facing the sealing cover.

Optionally, the number of the connecting structures is plural, and at least 80% or more of the connecting structures are located on a side of the support member facing the sealing cover.

Optionally, the number of the connecting structures is plural, and all the connecting structures are located on a side of the support facing the sealing cover.

Optionally, the working unit includes at least two battery modules and first component, two between the battery modules through two the busbar electricity is connected and forms first connection structure, between the battery module with first component through two the busbar electricity is connected and is formed with second connection structure, first connection structure with second connection structure all is located support piece orientation one side of sealed lid.

Optionally, the battery pack further includes a transfer bar, two bus bars are connected through the transfer bar, wherein one bus bar is located on one side of the support member facing the sealing cover with the transfer bar, and the other bus bar is located on the other side of the support member facing the sealing cover with the transfer bar.

Optionally, a first boss and a second boss are arranged on the switching row;

the busbar is provided with a positioning hole;

the first boss is inserted into a positioning hole of one of the bus bars, and the second boss is inserted into a positioning hole of the other bus bar.

Optionally, the working unit comprises a distribution box and a precursor plug-in;

the precursor plug-in is provided with a fourth busbar;

the distribution box is provided with a third busbar;

the precursor plug-in is electrically connected with the distribution box through the third bus bar and the fourth bus bar, and a sixth connecting structure is formed at the connecting position;

wherein the sixth connecting structure is positioned on one side of the support piece facing the sealing cover.

Optionally, the working unit comprises at least two battery modules, a distribution box and a precursor plug-in;

each battery module is provided with a first busbar and a second busbar, the distribution box is provided with a third busbar, and the precursor plug-in unit is provided with a fourth busbar;

in the adjacent battery modules, the first bus bar of one battery module is electrically connected with the second bus bar of the other battery module, and a first connecting structure is formed at the connection position;

the third bus bar of the distribution box is electrically connected with the first bus bar or the second bus bar of the battery module, and a third connection structure is formed at the connection position;

the fourth bus bar of the precursor plug is electrically connected with the first bus bar or the second bus bar of the battery module and forms a fourth connection structure at the connection position;

the fourth bus bar of the precursor plug-in is electrically connected with the third bus bar of the distribution box, and a fifth connecting structure is formed at the connecting position;

wherein at least two of the first, third, fourth and fifth connection structures are located at a side of the support facing the sealing cover.

Optionally, the electrical box comprises a secondary electrical box;

two third auxiliary buses are arranged on the auxiliary distribution box;

one of the third auxiliary buses of the auxiliary distribution box is electrically connected with the first bus bar of one of the battery modules and is provided with a third auxiliary connection structure at the connection position, and the other third auxiliary bus bar of the auxiliary distribution box is electrically connected with the second bus bar of the other battery module and is provided with a fourth auxiliary connection structure at the connection position;

wherein, third pair connection structure and fourth pair connection structure all are located the support piece orientation the one side of sealed lid.

Optionally, the battery pack further comprises a first switching row and a second switching row;

the first bus bar is connected with one of the third auxiliary bus bars through the first transfer bar, and the connection part of the first bus bar and the first transfer bar and the connection part of one of the third auxiliary bus bars and the first transfer bar are positioned on one side of the supporting piece and facing the sealing cover;

the second bus bar is connected with the other third auxiliary bus bar through a second switching bar, and the connection part of the second bus bar and the second switching bar and the connection part of the other third auxiliary bus bar and the second switching bar are positioned on one side of the supporting piece and face the sealing cover.

Optionally, a first cavity is formed in the tray, and the auxiliary distribution box is arranged in the first cavity.

Optionally, the distribution box further comprises a main distribution box, wherein the main distribution box is connected with a total positive end and a total negative end of the plurality of battery modules which are connected in series;

the main distribution box is provided with two third main buses;

the total positive end is electrically connected with one of the third main buses and forms a third main connection structure, and the total negative end is electrically connected with the other of the third main buses and forms a fourth main connection structure;

wherein, third main connection structure and fourth main connection structure all are located the support piece towards the one side of sealed lid.

Optionally, the battery pack further comprises a third switching row and a fourth switching row;

the joint of the total positive end and the third transfer row and the joint of the third transfer row and the third transfer row are positioned on one side of the supporting piece and facing the sealing cover;

the total negative end is connected with the other third main busbar through the fourth transfer row, and the joint of the total negative end and the fourth transfer row and the joint of the other third main busbar and the fourth transfer row are all positioned on one side of the supporting piece and face the sealing cover.

Optionally, a second cavity is formed in the tray, and the main distribution box is arranged in the second cavity.

Optionally, the total positive terminal and the total negative terminal connected to the main distribution box are located at both ends of the battery pack in the width direction.

The technical effect of this embodiment lies in, connects through the busbar between two work units, and its direction of connection all is towards one side of sealed lid makes it down fixed from last, is convenient for weld or screw punch to be convenient for link together two work units, and realize whole electricity in a direction and connect fixedly, make the operation all in the vision scope, also conveniently inspect simultaneously and fix whether qualified.

Other features of the present application and its advantages will become apparent from the following detailed description of exemplary embodiments of the present application, which proceeds with reference to the accompanying drawings.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments of the application and together with the description, serve to explain the principles of the application.

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

FIG. 2 is an enlarged view of a portion of F in FIG. 1;

fig. 3 is a schematic structural view of a battery pack according to an embodiment of the present application;

FIG. 4 is an enlarged view of a portion of FIG. 3 at A;

FIG. 5 is a partial enlarged view at B in FIG. 3;

FIG. 6 is an enlarged view of a portion of FIG. 3 at C;

FIG. 7 is a partial enlarged view at D in FIG. 3;

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

fig. 9 is a partial enlarged view at E in fig. 8.

Reference numerals illustrate: a battery pack 100; a battery module 1; a first bus bar 11; a positioning hole 111; a second bus bar 12; a transfer row 2; a first boss 21; a second boss 22; a tray 3; a cross beam 31; a front cross member 311; a rear cross member 312; a stringer 32; a housing chamber 33; a sub-distribution box 4; a third sub bus bar 41; a first switching row a; a second switching row b; a main distribution box 5; a third main busbar 51; a third switching row c; a fourth switching row d; a precursor insert 6; a fourth bus bar 61; a total positive end 7; and a total negative terminal 8.

Detailed Description

Various exemplary embodiments of the present application will now be described in detail with reference to the accompanying drawings. It should be noted that: 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 application unless it is specifically stated otherwise.

The following description of at least one exemplary embodiment is merely exemplary in nature and is in no way intended to limit the application, its application, or uses.

Techniques, methods, and apparatus known to one of ordinary skill in the relevant art may not be discussed in detail, but are intended to be 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 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.

First, referring to fig. 3 and 8, the length direction of the battery pack is the X direction, the width direction of the battery pack is the Y direction, and the height direction of the battery pack is the Z direction.

According to a first aspect of the embodiments of the present application, there is provided a battery pack 100, including a tray 3, a sealing cover sealing the tray 3, and a plurality of working units, wherein the plurality of working units are located in the tray 3, the two working units are electrically connected through two bus bars, and a connection structure is formed at the connection position of the two bus bars; wherein, the tray 3 is provided with a supporting piece, and at least two connecting structures are positioned on one side of the supporting piece facing the sealing cover.

Further, the battery pack 100 includes a tray 3, and a sealing cover sealing the tray 3 is provided on the tray 3, wherein the working unit is placed inside the tray 3. The sealing cover is used for covering the opening of the tray 3 for placing the working unit, and all the connecting structures face the sealing cover and the same direction, so that the assembly is convenient.

Wherein the pallet 3 is provided with support members, which may be front beams 311, rear beams 312, stringers 32, etc., which may provide mounting locations for the connection structure.

Further illustratively, the working unit may be a battery module 1, a distribution box or a precursor insert 6.

Further, any two working units are electrically connected together through two buses, and a connecting structure is formed at the connecting position of the two buses. Wherein a support member is provided on the tray 3, and a connection structure is provided on the support member, providing a connection position for connection between the working units, making it easy to install. The connecting structure faces one side of the sealing cover, so that the operation is convenient, the other side is connected in the same direction, the direction does not need to be adjusted during assembly, and the production efficiency can be improved.

In one embodiment, the number of the connecting structures is plural, and at least 50% or more of the connecting structures are located on the side of the support facing the sealing cover.

In one embodiment, the number of the connecting structures is plural, and at least 80% or more of the connecting structures are located on the side of the support facing the sealing cover.

In one embodiment, the number of the connecting structures is plural, and all the connecting structures are located on the side of the support facing the sealing cover.

Optionally, the working unit includes at least two battery modules 1 and a first element, two battery modules 1 are electrically connected by two bus bars and form a first connection structure, the battery modules 1 are electrically connected by two bus bars and form a second connection structure, and the first connection structure and the second connection structure are both located at one side of the support member facing the sealing cover.

In one embodiment, the working unit comprises at least two battery modules 1 and a first element. Wherein the first element may be a battery module 1, a distribution box or a precursor insert 6.

Specifically, the battery module 1 and the battery module 1 are electrically connected by a bus bar, and a first connection structure is formed at the connection. The battery module 1 is electrically connected to the first element via a bus bar, and a second connection structure is formed at the connection. Wherein first connection structure and second connection structure all are located the support piece and face one side of sealed lid, and the one side is the operation of being convenient for, and the other is all connected in same direction, need not adjust the direction when the assembly, can improve production efficiency.

Optionally, the battery pack 100 further includes a transfer bar 2, and two bus bars are connected through the transfer bar 2, where one bus bar is located on a side of the support facing the sealing cover, where the transfer bar 2, the other bus bar, and the transfer bar 2 are located on the same side of the support facing the sealing cover.

As shown in fig. 1 and 2, the battery pack 100 further includes a switching row 2, two bus bars are connected together through the switching row 2, and by setting the switching row 2, the battery module 1 and the battery module 1, and the battery module 1 and the first element are connected together, and the wiring in the battery pack 100 is also facilitated, so that the space utilization rate of the battery pack 100 can be improved, and the welding is also facilitated.

Specifically, one of them busbar is connected with the one end of switching row 2, another busbar is connected with the other end of switching row 2, thereby realize being in the same place two busbars through switching row 2, wherein the junction of busbar and switching row 2 is located the one side of support towards sealed lid, connect through welding or spiro union mode between busbar and the switching row 2, the direction of connection all is the same direction this moment, when the installation, namely from top to bottom is connected, on the one hand be convenient for operate, the other is all connected in same direction, do not need the adjustment direction, can improve production efficiency, and realize electrically connected fixedly in a direction, make the operation all in the vision scope, also convenient inspection is fixed whether qualified simultaneously.

Optionally, the adapter row 2 is provided with a first boss 21 and a second boss 22; the busbar is provided with a positioning hole 111; the first boss 21 is inserted into the positioning hole 111 of one of the bus bars, and the second boss 22 is inserted into the positioning hole 111 of the other bus bar.

As shown in fig. 2, the bus bar is provided with a positioning hole 111. A first boss 21 and a second boss 22 are provided at two of the adapter rows 2. The shape of the positioning hole 111 is matched with the shape of the first boss 21 and the second boss 22, so that the first boss 21 and the second boss 22 can be conveniently inserted into the positioning holes 111 of different buses. Through the mode of pegging graft, on the one hand, can be through locating hole 111 and boss grafting spacing, avoid busbar and switching row 2 to take place to slide in the welding, on the other hand can provide the locate action for the welding, carries out the welding on the boss, has found the position for the welding, can improve efficiency for welding process.

In one embodiment, the working unit comprises at least two battery modules 1 and a distribution box, wherein any two battery modules 1 are connected, and the battery modules 1 are connected with the distribution box.

The battery pack 100 provided herein includes at least two battery modules 1. In the embodiment, three battery modules 1, four battery modules 1, five battery modules 1, six battery modules 1 or more may be selected, and the number of the battery modules 1 may be selected according to practical applications, which is not limited in this application. The specific numbers given below are for illustration only.

Further, each of the battery modules 1 is provided with a first bus bar 11 and a second bus bar 12, and the first bus bar 11 and the second bus bar 12 are connected with electrode terminals of the battery modules 1, one of which is connected with a positive electrode terminal of the battery module 1, and the other of which is connected with a negative electrode terminal of the battery module 1; and a third busbar is arranged on the distribution box, and the third busbar is connected with positive and negative leads of the distribution box.

Further, the battery module 1 is connected with the battery module 1 by a first connection structure, wherein the first bus bar 11 of one battery module 1 is overlapped with the second bus bar 12 of the other battery module 1, the overlapping direction faces to one side of the sealing cover, and the first bus bar 11 and the second bus bar 12 are connected by welding.

Further illustrated, the electrical box may be used to control or monitor the operation of the battery pack 100.

Further, the distribution box is connected to two adjacent battery modules 1 to have a second connection structure, wherein the third bus bar is overlapped and overlapped with the first bus bar 11 of the battery module 1, the overlapping direction of the third bus bar faces one side of the sealing cover, or the third bus bar is overlapped and overlapped with the second bus bar 12 of the battery module 1, the overlapping direction of the third bus bar faces one side of the sealing cover, so that the connection relationship between the distribution box and the battery modules 1 is realized.

Therefore, no matter between battery module 1 and battery module 1 or between battery module 1 and the block terminal, its direction of connection all overlaps overlap joint and links together, and its overlap joint direction is one side towards sealed lid, and the welding direction of this moment all is the same direction, when the welding, namely from top to bottom welds, on the one hand is convenient for operate, and another kind all welds in same direction, does not need the adjustment direction when welding, can improve production efficiency to realize electric connection fixed in a direction, make the operation all in the visual range, also conveniently inspect whether fixed qualified simultaneously.

In one embodiment, the working unit comprises at least two battery modules 1 and a precursor insert 6, wherein any two battery modules 1 are connected, and the battery modules 1 are connected with the precursor insert 6.

The connection manner between the battery modules 1 and 1 is the same as that in the above embodiment, and thus, a description thereof will not be repeated.

As shown in fig. 7, the precursor plug-in 6 is arranged on the tray 3, so that the precursor plug-in is convenient to connect with the battery module 1 and the whole vehicle.

Further, the precursor plug-in 6 is connected to the adjacent battery module 1 with a fourth connection structure, in which the fourth bus bar 61 is connected to the first bus bar 11 of the battery module 1 in an overlapping manner with the overlapping direction facing one side of the sealing cover, or the fourth bus bar 61 is connected to the second bus bar 12 of the battery module 1 in an overlapping manner with the overlapping direction facing one side of the sealing cover.

Specifically, no matter between the battery module 1 and the battery module 1 or between the battery module 1 and the precursor plug-in 6, the connection directions are all overlapped and connected together, and the welding directions at the moment are all in the same direction, so that the operation is convenient when the welding is performed, namely, the welding is performed from top to bottom, on one hand, the welding is performed in the same direction, the direction does not need to be adjusted when the welding is performed, the production efficiency can be improved, the electric connection fixation is realized in one direction, the operation is in a visual range, and meanwhile, whether the fixation is qualified or not is also convenient to check.

Optionally, the working unit comprises an electrical box and a precursor insert 6; the precursor plug-in 6 is provided with a fourth busbar 61; the distribution box is provided with a third busbar; the precursor plug-in 6 is electrically connected with the distribution box through the third bus bar and the fourth bus bar 61, and a fifth connection structure is formed at the connection position; wherein the fifth connecting structure is positioned on one side of the supporting piece facing the sealing cover.

Further, the connection of the precursor plug-in 6 to the electrical box has a fifth connection, wherein the fourth busbar 61 is connected to the third busbar, wherein the fourth busbar 61 overlaps the third busbar, with the overlapping direction facing one side of the sealing cover. The fourth busbar 61 is connected with the third busbar from the top down through the mode of screw fastening, and the direction of connection that this moment is the same direction all, and the one hand is the operation of being convenient for, and the other hand is all connected in same direction, does not need the adjustment direction when the assembly, can improve production efficiency.

Optionally, the working unit comprises at least two battery modules 1, a distribution box and a precursor plug-in 6; a first busbar 11 and a second busbar 12 are arranged on each battery module 1, a third busbar is arranged on the distribution box, and a fourth busbar 61 is arranged on the precursor plug-in 6; in the adjacent battery modules 1, the first bus bar 11 of one of the battery modules 1 is electrically connected with the second bus bar 12 of the other battery module 1 and a first connection structure is formed at the connection; the third bus bar of the distribution box is electrically connected with the first bus bar 11 or the second bus bar 12 of the battery module 1 and a third connection structure is formed at the connection; the fourth bus bar 61 of the precursor insert 6 is electrically connected to the first bus bar 11 or the second bus bar 12 of the battery module 1 and forms a fourth connection structure at the connection; the fourth bus bar 61 of the precursor plug-in 6 is electrically connected with the third bus bar of the distribution box and a fifth connection structure is formed at the connection; wherein at least two of the first, third, fourth and fifth connection structures are located at a side of the support facing the sealing cover.

In one embodiment, the working unit comprises at least two battery modules 1, a distribution box and a precursor plug-in 6, wherein any two battery modules 1 are connected, the battery modules 1 are connected with the precursor plug-in 6, the battery modules 1 are connected with the distribution box, and the distribution box is connected with the precursor plug-in 6.

The connection mode between the battery modules 1 and 1, the connection mode between the battery modules 1 and the precursor plug-in 6, the connection mode between the battery modules 1 and the distribution box, and the connection mode between the distribution box and the precursor plug-in 6 are the same as those in the above embodiments, and therefore, the description thereof will not be repeated.

Specifically, no matter between the battery module 1 and the battery module 1, between the battery module 1 and the distribution box, between the battery module 1 and the precursor plug-in 6 or between the distribution box and the precursor plug-in 6, the connection directions are all overlapped and connected together, and the connection directions are all in the same direction, when connection and installation are needed, namely, connection from top to bottom are needed, on one hand, the operation is convenient, and on the other hand, the operation is all connected in the same direction, the direction does not need to be adjusted during connection, the production efficiency can be improved, and the electric connection and fixation are realized in one direction, so that the operation is in a visual range, and meanwhile, whether the fixation is qualified or not is also convenient to check.

Optionally, the distribution box comprises a secondary distribution box 4; two third auxiliary buses 41 are arranged on the auxiliary distribution box 4; one of the third sub-bus bars 41 of the sub-distribution box is electrically connected with the first bus bar 11 of one of the battery modules 1 and a third sub-connection structure is formed at the connection, and the other of the third sub-bus bars 41 of the sub-distribution box is electrically connected with the second bus bar 12 of the other of the battery modules 1 and a fourth sub-connection structure is formed at the connection; wherein, third pair connection structure and fourth pair connection structure all are located the support piece orientation the one side of sealed lid.

In one embodiment, the distribution box includes a sub distribution box 4, and the sub distribution box 4 is connected in series between two adjacent battery modules 1 such that the sub distribution box 4 can control connection or disconnection of the circuit of the battery pack 100. The circuit is disconnected through the auxiliary distribution box 4, so that the battery pack 100 can be divided into two parts, and meanwhile, the total voltage can be divided into two parts, so that the total voltage of the battery pack 100 during disconnection is reduced, and the safety risk of operators and the high-voltage arcing risk during out-of-control of the battery pack 100 are reduced.

Preferably, if the battery pack 100 has four battery modules 1 connected in series, the sub-distribution box 4 is connected in series between the second battery module 1 and the third battery module 1 to be able to control disconnection and connection between two battery modules 1 and the other two battery modules 1, thereby being able to divide the voltage of the battery pack 100 into two. If the battery pack 100 has six battery modules 1 connected in series, the sub-distribution box 4 is connected in series between the third battery module 1 and the fourth battery module 1 so as to be able to control disconnection and connection between the three battery modules 1 and the other three battery modules 1, thereby being able to divide the voltage of the battery pack 100 into two. In summary, the auxiliary distribution box 4 is connected in series to the middle positions of the battery modules 1, so that the voltage can be halved when the circuit is opened, and the safety risk of operators and the high-voltage arcing risk when the battery pack 100 is out of control are reduced.

Further, two third auxiliary buses 41 are provided on the auxiliary distribution box 4, wherein the two third auxiliary buses 41 are respectively connected with positive and negative electrode leads of the auxiliary distribution box 4, one of which is connected with the positive electrode lead, and the other of which is connected with the negative electrode lead. Further, one of the third sub-bus bars 41 is overlapped with the first bus bar 11 of one of the battery modules 1 in such a manner that the overlapping direction thereof faces one side of the sealing cover, and the other third sub-bus bar 41 is overlapped with the second bus bar 12 of the other battery module 1 in such a manner that the overlapping direction thereof faces one side of the sealing cover, thereby achieving the connection relationship between the sub-distribution box 4 and the battery modules 1.

Specifically, the battery module 1 and the auxiliary distribution box 4 are connected together in an overlapping and lap joint mode, the welding directions are in the same direction, when welding, namely welding from top to bottom, on one hand, the operation is convenient, and on the other hand, the welding is in the same direction, the direction does not need to be adjusted when welding, the production efficiency can be improved, the electric connection fixation is realized in one direction, the operation is in a visual range, and meanwhile, whether the fixation is qualified or not is also convenient to check.

Optionally, the battery pack 100 further includes a first switching row a and a second switching row b; the first bus bar 11 is connected with one of the third auxiliary bus bars 41 through the first transfer bar a, and the connection part of the first bus bar 11 and the first transfer bar a and the connection part of one of the third auxiliary bus bars 41 and the first transfer bar a are positioned on one side of the supporting piece and facing the sealing cover; the second busbar 12 is connected with another third auxiliary busbar 41 through a second switching row b, and the connection part of the second busbar 12 and the second switching row b and the connection part of the other third auxiliary busbar 41 and the second switching row b are all positioned on one side of the supporting piece and facing the sealing cover.

Further, the battery pack 100 further includes a first transfer line a and a second transfer line b, wherein the first bus bar 11 is connected to one of the third sub-bus bars 41 through the first transfer line a, and the second bus bar 12 is connected to the other third sub-bus bar 41 through the second transfer line b. The battery module 1 is conveniently connected with the auxiliary distribution box 4, wires are conveniently routed in the battery pack 100, the space utilization rate of the battery pack 100 can be improved, and welding is also convenient.

Further illustratively, the first bus bar 11 of one of the battery modules 1 is connected to the third secondary bus bar 41 via a first adapter bar a; the second busbar 12 of the other battery module 1 is connected to the other third secondary busbar 41 via a second transfer busbar b. As shown in fig. 4, 8 and 9, the first bus bar 11 of one of the battery modules 1 overlaps the first transfer bar a with the overlapping direction toward one side of the sealing cover, and the third sub bus bar 41 overlaps the first transfer bar a with the overlapping direction toward one side of the sealing cover. The second busbar 12 of the other battery module 1 overlaps the second transfer busbar b with its overlapping direction facing one side of the sealing cover, and the other third auxiliary busbar 41 overlaps the second transfer busbar b with its overlapping direction facing one side of the sealing cover. That is, one of the battery modules 1 is connected with one of the third auxiliary buses 41 of the auxiliary distribution box 4 through the first switching bus a, the other of the battery modules 1 is connected with the other of the third auxiliary buses 41 of the auxiliary distribution box 4 through the second switching bus b, and the battery modules are overlapped in the same direction, so that the installation directions are the same, the welding directions at the moment are all in the same direction, and when welding, that is, from top to bottom, the operation is convenient, the other is welding in the same direction, the direction does not need to be adjusted during welding, and the production efficiency can be improved.

Optionally, a first cavity (not shown in the figure) is formed on the tray 3, and the auxiliary distribution box 4 is disposed in the first cavity.

As shown in fig. 3, the pallet 3 has a cross member 31 and a side member 32, the cross member 31 and the side member 32 being in a vertical relationship. The cross beams 31 are in parallel relation, the longitudinal beams 32 are in parallel relation, the tray 3 surrounded by the cross beams 31 and the longitudinal beams 32 is provided with a plurality of accommodating cavities 33, one battery module 1 is placed in each accommodating cavity 33 and is divided into a plurality of accommodating cavities 33, and if the battery module 1 in one accommodating cavity 33 is out of control, the influence on the battery modules 1 in the other accommodating cavities 33 can be reduced, so that the safety of the battery pack 100 can be improved.

The pallet 3 shown in fig. 3 has four cross members 31 and three longitudinal members 32, which enclose the pallet 3 with six receiving cavities 33. The cross members 31 and the side members 32 can improve the structural strength of the pallet 3.

Further, the tray 3 is provided with a first cavity, preferably the first cavity is provided on the front beam 311, and the opening of the first cavity faces to the left in the X direction (please refer to fig. 3), and the auxiliary distribution box 4 is disposed in the first cavity, so that the auxiliary distribution box 4 can be separated from the battery module 1 without increasing the volume of the battery pack 100, so as to improve the electrical safety of the battery pack 100.

Optionally, the distribution box further comprises a main distribution box 5, wherein the main distribution box 5 is connected with a total positive end 7 and a total negative end 8 of a plurality of battery modules 1 connected in series;

two third main buses 51 are arranged on the main distribution box 5;

the total positive end 7 is electrically connected with one of the third main buses 51 and forms a third main connection structure, and the total negative end 8 is electrically connected with the other of the third main buses 51 and forms a fourth main connection structure; wherein, third main connection structure and fourth main connection structure all are located the support piece towards the one side of sealed lid.

To further illustrate, the plurality of battery modules 1 are connected in series and have a total positive terminal 7 and a total negative terminal 8, wherein the total positive terminal 7 and the total negative terminal 8 are respectively located on the battery modules 1 at two ends of the plurality of battery modules 1 connected in series, and wherein the main distribution box 5 is connected with the plurality of battery modules 1 connected in series. Wherein the main distribution box 5 is used to monitor and control the operation of the battery pack 100.

Further, two third main buses 51 are provided on the main distribution box 5, wherein the two third main buses 51 are respectively connected with positive and negative electrode leads of the main distribution box 5, one of which is connected with the positive electrode lead, and the other of which is connected with the negative electrode lead. Further, one of the third main buses 51 overlaps the main positive terminal 7 with its overlapping direction facing one side of the sealing cover, and the other third main bus 51 overlaps the main negative terminal 8 with its overlapping direction facing one side of the sealing cover, thereby achieving the connection relationship between the main distribution box 5 and the battery module 1.

Specifically, the battery module 1 and the main distribution box 5 are connected in an overlapping and lap joint manner in the same direction, and the welding directions are in the same direction at the moment.

Optionally, the battery pack 100 further includes a third switching row c and a fourth switching row d; the total positive end 7 is connected with one of the third main bus bars 51 through the third transfer bar c, and the connection part of the total positive end 7 and the third transfer bar c and the connection part of one of the third main bus bars 51 and the third transfer bar c are positioned on one side of the supporting piece and facing the sealing cover; the total negative terminal 8 is connected with another third main busbar 51 through a fourth transfer row d, and the connection part of the total negative terminal 8 and the fourth transfer row d and the connection part of the other third main busbar 51 and the fourth transfer row d are all positioned on one side of the support piece and facing the sealing cover.

Further, the battery pack 100 further includes a third switching row c and a fourth switching row d, wherein the total positive terminal 7 is connected to one of the third main buses 51 through the third switching row c, and the total negative terminal 8 is connected to the other third main bus 51 through the fourth switching row d. The battery module 1 is conveniently connected with the main distribution box 5, is also conveniently routed in the battery pack 100, can improve the space utilization of the battery pack 100, and is also convenient for welding.

Further, the total positive terminal 7 is connected to one of the third main buses 51 via a third transfer bus c, and the total negative terminal 8 is connected to the other third main bus 51 via a fourth transfer bus d. As shown in fig. 3 and 5, the total positive end 7 is overlapped with the third transfer row c with the overlapping direction facing one side of the sealing cover, and one third main busbar 51 is overlapped with the third transfer row c with the overlapping direction facing one side of the sealing cover; the total negative terminal 8 overlaps the fourth transfer row d with its overlapping direction facing one side of the sealing cover, and the other third main busbar 51 overlaps the fourth transfer row d with its overlapping direction facing one side of the sealing cover.

I.e. the total positive terminal 7 is connected to one of the third main busbars 51 of the main distribution box 5 via a third transfer busbar c and the total negative terminal 8 is connected to the other third main busbar 51 of the main distribution box 5 via a fourth transfer busbar d. And all overlap in the same direction, just so make the installation direction the same, the welding direction is the same direction all, when the welding, namely from top to bottom welds, on the one hand is convenient for operate, and the other hand is all welded in same direction, does not need the adjustment direction when welding, can improve production efficiency.

Optionally, a second cavity (not shown in the figure) is formed on the tray 3, and the main distribution box 5 is disposed in the second cavity.

Further, the tray 3 is provided with a second cavity, preferably the second cavity is provided on the rear beam 312, and the opening of the second cavity faces to the right in the X direction (please refer to fig. 3), and the main distribution box 5 is disposed in the second cavity, so that the main distribution box 5 can be separated from the battery module 1 without increasing the volume of the battery pack 100, so as to improve the electrical safety of the battery pack 100.

Alternatively, the total positive terminal 7 and the total negative terminal 8 connected to the main distribution box 5 are located at both ends in the width direction of the battery pack 100.

Further, the total positive terminal 7 and the total negative terminal 8 are located at both ends of the width direction of the battery pack 100, respectively, and the distance between the total positive terminal 7 and the total negative terminal 8 of the battery pack 100 can be increased when the circuits of the two battery modules 1 connected by the secondary distribution box 4 are disconnected, so as to reduce the risk of short circuit.

Although specific embodiments of the present application have been described in detail by way of example, it will be appreciated by those skilled in the art that the above examples are for illustration only and are not intended to limit the scope of the present application. It will be appreciated by those skilled in the art that modifications may be made to the above embodiments without departing from the scope and spirit of the present application. The scope of the application is defined by the appended claims.

Claims

1. The battery pack is characterized by comprising a tray (3), a sealing cover for sealing the tray (3) and a plurality of working units, wherein the working units are positioned in the tray (3), the two working units are electrically connected through two bus bars, and a connecting structure is formed at the connecting position of the two bus bars;

wherein, be equipped with support piece on tray (3), at least two connection structure is located support piece orientation one side of sealed lid.

2. The battery pack according to claim 1, wherein the number of the connection structures is plural, and at least 50% or more of the connection structures are located on the side of the support member facing the sealing cover.

3. The battery pack according to claim 1, wherein the number of the connection structures is plural, and at least 80% or more of the connection structures are located on the side of the support member facing the sealing cover.

4. The battery pack according to claim 1, wherein the number of the connection structures is plural, and all of the number of the connection structures are located on a side of the support member facing the sealing cover.

5. The battery pack according to claim 1, wherein the working unit comprises at least two battery modules (1) and a first element, wherein the two battery modules (1) are electrically connected through the two bus bars and form a first connecting structure, the battery modules (1) are electrically connected with the first element through the two bus bars and form a second connecting structure, and the first connecting structure and the second connecting structure are both positioned on one side of the support piece facing the sealing cover.

6. The battery pack according to any one of claims 1-5, wherein the battery pack (100) further comprises a transfer bar (2), wherein two of the bus bars are connected by the transfer bar (2), wherein one of the bus bars is located on a side of the support facing the sealing cover with the transfer bar (2), and the other bus bar is located on a side of the transfer bar (2).

7. The battery pack of claim 6, wherein the battery pack comprises a plurality of battery cells,

a first boss (21) and a second boss (22) are arranged on the switching row (2);

the busbar is provided with a positioning hole (111);

the first boss (21) is inserted into a positioning hole (111) of one of the bus bars, and the second boss (22) is inserted into a positioning hole (111) of the other bus bar.

8. The battery pack according to claim 1, wherein the working unit comprises a distribution box and a precursor insert (6);

the precursor plug-in (6) is provided with a fourth busbar (61);

the distribution box is provided with a third busbar;

the precursor plug-in (6) is electrically connected with the distribution box through the third bus bar and the fourth bus bar (61), and a sixth connecting structure is formed at the connecting position;

9. The battery pack according to claim 1, wherein the working unit comprises at least two battery modules (1), a distribution box and a precursor insert (6);

a first busbar (11) and a second busbar (12) are arranged on each battery module (1), a third busbar is arranged on the distribution box, and a fourth busbar (61) is arranged on the precursor plug-in unit (6);

in the adjacent battery modules (1), the first bus bar (11) of one battery module (1) is electrically connected with the second bus bar (12) of the other battery module (1) and a first connecting structure is formed at the connection part;

the third busbar of the distribution box is electrically connected with the first busbar (11) or the second busbar (12) of the battery module (1) and a third connection structure is formed at the connection position;

the fourth busbar (61) of the precursor plug-in (6) is electrically connected to the first busbar (11) or the second busbar (12) of the battery module (1) and forms a fourth connection structure at the connection;

the fourth busbar (61) of the precursor plug-in (6) is electrically connected with the third busbar of the distribution box and a fifth connection structure is formed at the connection position;

10. The battery pack according to claim 9, wherein the distribution box comprises a secondary distribution box (4);

two third auxiliary buses (41) are arranged on the auxiliary distribution box (4);

one of the third auxiliary buses (41) of the auxiliary distribution box (4) is electrically connected with the first bus bar (11) of one of the battery modules (1) and is provided with a third auxiliary connection structure at the connection position, and the other third auxiliary bus bar (41) of the auxiliary distribution box (4) is electrically connected with the second bus bar (12) of the other battery module (1) and is provided with a fourth auxiliary connection structure at the connection position;

11. The battery pack of claim 10, wherein the battery pack comprises a plurality of battery cells,

the battery pack (100) further comprises a first switching row (a) and a second switching row (b);

the first bus bar (11) is connected with one of the third auxiliary bus bars (41) through the first transfer bar (a), and the connection part of the first bus bar (11) and the first transfer bar (a) and the connection part of one of the third auxiliary bus bars (41) and the first transfer bar (a) are positioned on one side of the supporting piece and facing the sealing cover;

the second bus bar (12) is connected with the other third auxiliary bus bar (41) through a second switching row (b), and the connection part of the second bus bar (12) and the second switching row (b) and the connection part of the other third auxiliary bus bar (41) and the second switching row (b) are positioned on one side of the supporting piece and facing the sealing cover.

12. The battery pack according to claim 10, wherein the tray (3) is provided with a first cavity, and the auxiliary distribution box (4) is arranged in the first cavity.

13. The battery pack according to claim 9, wherein the distribution box further comprises a main distribution box (5), the main distribution box (5) connecting a total positive terminal (7) and a total negative terminal (8) of a plurality of the battery modules (1) after being connected in series;

the main distribution box (5) is provided with two third main buses (51);

the total positive end (7) is electrically connected with one of the third main buses (51) and forms a third main connection structure, and the total negative end (8) is electrically connected with the other third main bus (51) and forms a fourth main connection structure;

14. The battery pack of claim 13, wherein the battery pack comprises a plurality of battery cells,

the battery pack (100) further comprises a third switching row (c) and a fourth switching row (d);

the total positive end (7) is connected with one of the third main bus bars (51) through the third transfer bar (c), and the joint of the total positive end (7) and the third transfer bar (c) and the joint of one of the third main bus bars (51) and the third transfer bar (c) are both positioned on one side of the supporting piece and facing the sealing cover;

the total negative end (8) is connected with the other third main busbar (51) through the fourth transfer row (d), and the joint of the total negative end (8) and the fourth transfer row (d) and the joint of the other third main busbar (51) and the fourth transfer row (d) are all positioned on one side of the supporting piece and facing the sealing cover.

15. Battery pack according to claim 13, characterized in that the tray (3) is provided with a second cavity, in which the main distribution box (5) is arranged.

16. The battery pack according to claim 13, wherein the total positive terminal (7) and the total negative terminal (8) connected to the main distribution box (5) are located at both ends in the width direction of the battery pack (100).