CN217426945U

CN217426945U - Battery pack

Info

Publication number: CN217426945U
Application number: CN202220735097.0U
Authority: CN
Inventors: 宋海阳
Original assignee: Svolt Energy Technology Co Ltd
Current assignee: Svolt Energy Technology Co Ltd
Priority date: 2022-03-30
Filing date: 2022-03-30
Publication date: 2022-09-13
Anticipated expiration: 2032-03-30

Abstract

The application relates to the technical field of batteries, in particular to a battery pack. The battery pack comprises a shell, a cross beam, four battery units and a mounting space formed inside a connecting row shell, wherein the mounting space is divided into two mounting compartments by the cross beam, two battery units are arranged in each mounting compartment, the two battery units in each mounting compartment are arranged along the transverse direction of the shell at intervals, and a longitudinal gap is formed between the two battery units; the two battery units positioned on the same side of the two longitudinal gaps are connected at the cross beam through the connecting row; two battery units in one installation compartment are connected at a longitudinal gap by a connecting row. This battery package compares and reduces to two from four in prior art locating surfaces to make the location simpler, the location installation effectiveness is showing and is improving, has improved the thermal runaway security performance of the whole package of battery package, can avoid using long copper bar to connect.

Description

Battery pack

Technical Field

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

Background

The existing battery pack directly stacks the battery cells to the end in sequence along the preset direction, and all the battery cells stacked along the preset direction are connected into a whole and then are installed in the shell.

However, the middle part of the battery pack usually needs to be bridged with the cross beam, all the battery cores are connected into a whole and then can be installed in the shell, and the cross beam is bridged in the shell, so that the bus bar of the battery core, the sampling component and the like need to be bridged with the cross beam to complete the installation of the battery core to the shell, and the structure and the installation step are complex in design and difficult to realize.

In addition, in the installation, need ensure simultaneously that the electric core that spanes the roof beam both sides aligns with the boundary beam that spanes roof beam and casing, that is to say to supply and to ensure that four locating surfaces aim at simultaneously, just can ensure to realize the location installation of electric core to the casing, the location is complicated and the degree of difficulty is high, and the ten minutes is unfavorable for producing the line design.

SUMMERY OF THE UTILITY MODEL

An object of the application is to provide a battery package to solve to a certain extent that exist among the prior art and install the location of 4 faces simultaneously to the in-process of battery package casing need guarantee, the location requires too high and be unfavorable for producing the technical problem of line design.

The application provides a battery pack, which comprises a shell, a cross beam, four battery units and a connecting bar;

an installation space is formed in the shell, the installation space is divided into two installation compartments by a cross beam, two battery units are arranged in each installation compartment, the two battery units in each installation compartment are arranged at intervals along the transverse direction of the shell, and a longitudinal gap is formed between the two battery units;

two battery units positioned on the same side of the two longitudinal gaps are connected at the cross beam through the connecting row;

two of the battery cells in one of the mounting compartments are connected at the longitudinal gap by the connecting row.

In the above technical solution, further, the battery unit includes a battery module and a BMS slave plate;

the battery cell assembly comprises a plurality of battery cells which are longitudinally stacked side by side along the shell, and the BMS slave plates are arranged on the side parts, close to the cross beams, of the battery cell assembly.

In any of the above technical solutions, further, the electric core assembly further includes a positive output pole and a negative output pole;

the cell closest to the BMS slave plate in the longitudinal direction of the shell in the plurality of cells of the cell assembly is a first cell, and the cell farthest from the BMS slave plate is a second cell;

the positive output electrode is disposed on the first cell or the second cell, and the negative output electrode is disposed on the second cell or the first cell.

In any one of the above technical solutions, further, every two first battery cells adjacent to the cross beam are respectively provided with a positive output electrode and a negative output electrode, and the connecting bar is connected between the positive output electrode and the negative output electrode of every two first battery cells adjacent to the cross beam.

In any one of the above technical solutions, further, the connecting bar is connected between the positive output electrode and the negative output electrode of the two second battery cells adjacent to the longitudinal gap, and the positive output electrode and the negative output electrode of the other two second battery cells are used for electrically connecting the battery pack with the outside.

In any of the above technical solutions, further, when the number of the cell assemblies is an odd number, the positive output electrode is disposed on the first cell, the negative output electrode is disposed on the second cell, and the positive output electrode and the negative output electrode are respectively disposed at different ends of the cell assemblies along the transverse direction of the housing, a first battery unit is formed;

when the number of the cell assemblies is an odd number, the positive output electrode is arranged on the second cell, the negative output electrode is arranged on the first cell, and the positive output electrode and the negative output electrode are respectively arranged at different ends of the cell assemblies along the transverse direction of the shell, a second battery unit is formed;

when the number of the cell assemblies is even, the positive output electrode is arranged on the first cell, the negative output electrode is arranged on the second cell, and the positive output electrode and the negative output electrode are respectively arranged at the same end of the cell assemblies along the transverse direction of the shell, a third battery unit is formed;

when the quantity of electric core subassembly is the even number, positive output pole set up in on the second electric core, negative output pole set up in on the first electric core, positive output pole with negative output pole follows respectively the casing transversely set up in when the same one end of electric core subassembly, form fourth battery unit.

In any of the above technical solutions, further, the first battery unit is disposed in each of two diagonally located mounting compartments, and the second battery unit is disposed in each of the other two diagonally located mounting compartments;

the two second battery units are turned over by 180 degrees relatively, and the two first battery units are turned over by 180 degrees relatively.

In any one of the above technical solutions, further, the third battery unit is disposed in each of two diagonally located mounting compartments, and the fourth battery unit is disposed in each of the other two diagonally located mounting compartments;

the two third battery units are oppositely turned over by 180 degrees, and the two fourth battery units are oppositely turned over by 180 degrees.

In any of the above technical solutions, further, the first battery unit and the second battery unit are respectively disposed in the two mounting compartments on the first side of the cross beam;

the third battery unit and the fourth battery unit are arranged in the two mounting compartments on the second side of the cross beam respectively.

In any of the above technical solutions, further, the third battery unit and the fourth battery unit are respectively disposed in the two mounting compartments on the first side of the cross beam;

the first battery unit and the second battery unit are arranged in the two installation compartments on the second side of the cross beam respectively.

Compared with the prior art, the beneficial effect of this application is:

the application provides a battery pack includes casing, crossbeam, four battery cell and run-on.

The inside of casing forms the installation space, the installation space is divided into two installation compartments by the crossbeam, be provided with two battery units in every installation compartment, two battery units in every installation compartment set up and form vertical clearance between the two along the horizontal interval of casing, thereby when installing every battery unit, only need guarantee that battery unit's fore-and-aft one end aligns with the boundary beam of casing, guarantee simultaneously that battery unit's fore-and-aft other end aligns with the crossbeam, can accomplish every battery unit's installation, compare in prior art, the locating surface reduces to two from four, thereby make the location simpler, location installation effectiveness is showing and is improving.

In addition, adjacent battery unit separates through the crossbeam or separates through vertical clearance for every battery unit independent setting, when single battery unit takes place the thermal runaway, can effectively avoid carrying out the thermal diffusion to adjacent battery unit, has improved the thermal runaway security performance of whole package of battery package.

The two battery units positioned on the same side of the two longitudinal gaps are connected at the cross beam through the connecting row; two battery units in one installation compartment are connected at the longitudinal gap through the connecting row, so that the connecting path of the connecting row is minimized, and the use of long copper bars for connection can be avoided.

Drawings

In order to more clearly illustrate the detailed description of the present application or the technical solutions in the prior art, the drawings used in the detailed description or the prior art description will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative efforts.

Fig. 1 is a schematic structural diagram of a first battery unit of a battery pack provided in an embodiment of the present application;

fig. 2 is a schematic structural diagram of a second battery unit of a battery pack provided in an embodiment of the present application;

fig. 3 is a schematic structural diagram of a third battery unit of a battery pack according to an embodiment of the present disclosure;

fig. 4 is a schematic structural diagram of a fourth battery unit of a battery pack provided in an embodiment of the present application;

fig. 5 is a schematic diagram of a first structure of a battery pack according to an embodiment of the present application;

fig. 6 is a second structural schematic diagram of a battery pack according to an embodiment of the present application;

fig. 7 is a schematic diagram of a third structure of a battery pack according to an embodiment of the present application;

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

Reference numerals are as follows:

1-a battery pack; 10-a first battery cell; 11-a second battery cell; 12-a third battery cell; 14-a fourth battery cell; 15-a first cell; 16-a second cell; 17-positive output pole; 18-a negative output pole; 19-BMS slave boards; 20-a housing; 21-longitudinal clearance; 22-beam mounting location; 23-connecting rows.

Detailed Description

The technical solutions of the present invention will be described more clearly and completely with reference to the accompanying drawings, and it should be understood that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

Referring to fig. 1 to 8, an embodiment of the present application provides a battery pack 1 including a case 20, a cross member, four battery cells, and a connection bar 23.

The interior of the housing 20 forms a mounting space divided by a cross member into two mounting compartments, two battery units are disposed in each mounting compartment, the two battery units in each mounting compartment are disposed at intervals along the transverse direction of the housing, and a longitudinal gap 21 is formed between the two battery units. As shown in fig. 5 to 8, the longitudinal gap 21 may be left empty to separate two battery cells in the same compartment, and the longitudinal gap 21 may also be provided with a longitudinal beam to further improve the strength of the whole pack, and the longitudinal gap 21 extends in the left-right direction in the view angle of the drawing, that is, the longitudinal direction of the housing 20 is identical to the left-right direction in the view angle of the drawing; also shown are beam mounting locations 22 for providing beams (not shown in the figures), which beam mounting locations 22 extend in the up-down direction in the view of the figure, i.e. the lateral direction of the housing coincides with the up-down direction in the view of the figure.

Therefore, on the one hand, in the installation stage, the four battery units are installed to the two installation compartments of the shell 20 one by one without installing the battery units on the two sides of the cross beam into the shell 20 as a whole, one longitudinal end face of each battery unit is aligned to the reference surface of the edge beam of the shell 20 and the other longitudinal end face of each battery unit is aligned to the reference surface of the cross beam in the process of installing each battery unit into the shell 20, so that the positioning and installation of each battery unit can be realized only through the positioning of the two faces, and the positioning is convenient, efficient and accurate.

On the other hand, the battery units in the two installation compartments are separated by the cross beams, and the two battery units in each installation compartment are separated by the longitudinal gap 21 or the longitudinal beam, so that the four battery units are independently arranged, and therefore, thermal isolation is realized between every two adjacent battery units through the longitudinal gap, the longitudinal beam or the cross beam, and therefore, any battery unit finds thermal runaway, and the thermal runaway can be effectively inhibited from being diffused, so that the rest battery units are not influenced.

Two battery cells located on the same side of the two longitudinal gaps 21 are connected at the cross beam by the connecting row 23, that is, the two sides of the longitudinal gaps 21 in the transverse direction of the housing 20 are respectively defined as a first side and a second side, so that the battery cells on the first sides of the two longitudinal gaps are connected at the cross beam by the connecting row 23, and the battery cells on the second sides of the two longitudinal gaps are connected at the cross beam by the connecting row 23, so that the battery cells on the two sides of the cross beam are connected two by two.

Two battery unit in an installation compartment are connected in vertical clearance 21 department through connecting row 23 to vertical clearance 21 both sides have been established ties mutually by two liang of battery unit that link to each other, and then four battery unit establish ties mutually in order and form wholly, and make the connection route minimizing of connecting row 23, can avoid using long copper bar to connect, have simplified the structure, the cost is reduced. In contrast, the long copper bars in the prior art have the longest length even comparable to the cross beam.

It is worth emphasizing that two battery units in another installation compartment are not connected by the connection bank 23.

In an alternative of this embodiment, the battery cells include a battery core assembly and a BMS slave board 19, which refers to a battery management system.

The cell assembly includes a plurality of cells stacked side by side in the longitudinal direction of the case 20, and the BMS slave boards 19 are disposed at the sides of the cell assembly near the cross member, that is, the BMS slave boards 19 of two battery cells of each column are respectively disposed adjacent to the sides of the cross member, so that the distance between the two BMS slave boards 19 is minimized, and the communication harness between the adjacent two BMS slave boards 19 can be optimized and minimized.

In an alternative of this embodiment, the core assembly further comprises a positive output pole 17 and a negative output pole 18.

As shown in fig. 1 to 4, a cell closest to the BMS slave board 19 in the longitudinal direction of the casing 20 among the plurality of cells of the cell assembly is the first cell 15, and a cell farthest from the BMS slave board 19 in the longitudinal direction of the casing 20 among the plurality of cells of the cell assembly is the second cell 16.

A positive output pole 17 is disposed on first cell 15 or second cell 16, and a negative output pole 18 is disposed on second cell 16 or first cell 15, respectively. That is, positive output electrode 17 is disposed on first battery cell 15 and negative output electrode 18 is disposed on second battery cell 16, or positive output electrode 17 is disposed on second battery cell 16 and negative output electrode 18 is disposed on first battery cell 15.

So that each battery cell can be connected to other battery cells or to the member to be powered through the positive output electrode 17 and the negative output electrode 18.

In an alternative of this embodiment, a positive output electrode 17 and a negative output electrode 18 are respectively disposed on every two first battery cells 15 adjacent to the cross beam, specifically, two battery units in each column include one first battery cell 15, that is, each column includes two first battery cells 15, and the two first battery cells 15 are respectively provided with the positive output electrode 17 and the negative output electrode 18.

The connecting row 23 is connected between the positive output electrode 17 and the negative output electrode 18 on every two first battery cells 15 adjacent to the cross beam, that is, the positive output electrode 17 and the negative output electrode 18 on every two first battery cells 15 in each column are connected through the connecting row 23, and since the positive output electrode 17 and the negative output electrode 18 are both arranged adjacent to the cross beam, two battery units in each column are conveniently connected in series through the connecting row 23.

In an alternative of this embodiment, the connection bar 23 is connected to the positive output pole 17 and the negative output pole 18 on two second battery cells 16 adjacent to the longitudinal gap 21, and the positive output pole 17 and the negative output pole 18 on the other two second battery cells 16 are used for electrically connecting the battery pack 1 with the outside.

It is worth emphasizing that only one connection row 23 is provided at the longitudinal gap 21, while two connection rows 23 are provided at the cross beam, because the four battery units comprise four positive output poles 17 and four negative output poles 18 in total, three pairs of positive output poles 17 and three pairs of negative output poles 18 are respectively connected by three connection rows 23, and the remaining pair of positive output poles 17 and negative output poles 18 are used for connecting with external battery packs or devices to be powered and the like.

In this embodiment, the cell modules may be formed into the following four types according to the number characteristics of the cells included in the cell assembly and the relative positional relationship characteristics of the positive output electrode 17 and the negative output electrode 18 in the transverse direction of the casing 20.

Specifically, as shown in fig. 1, when the number of the cell assembly is an odd number, the positive output electrode 17 is disposed on the first cell 15, the negative output electrode 18 is disposed on the second cell 16, and the positive output electrode 17 and the negative output electrode 18 are disposed at different ends of the cell assembly in the lateral direction of the casing 20, respectively, the first battery unit 10 is formed.

As shown in fig. 2, when the number of the cell assembly is an odd number, the positive output electrode 17 is disposed on the second cell 16, the negative output electrode 18 is disposed on the first cell 15, and the positive output electrode 17 and the negative output electrode 18 are disposed at different ends of the cell assembly along the transverse direction of the housing 20, respectively, the second battery unit 11 is formed.

As shown in fig. 3, when the number of the cell assemblies is even, the positive output electrode 17 is disposed on the first cell 15, the negative output electrode 18 is disposed on the second cell 16, and the positive output electrode 17 and the negative output electrode 18 are disposed at the same end of the cell assemblies in the transverse direction of the casing 20, respectively, a third battery unit 12 is formed.

As shown in fig. 4, when the number of the cell assemblies is an even number, the positive output electrode 17 is disposed on the second cell 16, the negative output electrode 18 is disposed on the first cell 15, and the positive output electrode 17 and the negative output electrode 18 are disposed at the same end of the cell assemblies respectively in the transverse direction of the housing 20, the fourth battery unit 14 is formed.

In an alternative of this embodiment, two or four of the four battery units may be optionally combined according to the actual size requirement and power supply requirement of the battery pack. Specifically, the method comprises the following four combined structures:

in a first combined structure, as shown in fig. 5, two diagonally located mounting compartments are each provided with a first battery unit 10, and the other two diagonally located mounting compartments are each provided with a second battery unit 11; the two second battery cells 11 are turned over 180 ° with respect to each other, and the two first battery cells 10 are turned over 180 ° with respect to each other.

In a second combined structure, as shown in fig. 6, two diagonally located installation compartments are each provided with a third battery unit 12, and the other two diagonally located installation compartments are each provided with a fourth battery unit 14; the two third cells 12 are turned 180 ° with respect to each other and the two fourth cells 14 are turned 180 ° with respect to each other.

In a third combined structure, as shown in fig. 7, a first battery unit 10 and a second battery unit 11 are respectively arranged in two installation compartments on a first side of the cross beam; a third battery unit 12 and a fourth battery unit 14 are arranged in the two mounting compartments on the second side of the cross beam, respectively.

In a fourth combined structure, as shown in fig. 8, a third battery unit 12 and a fourth battery unit 14 are respectively arranged in two installation compartments on the first side of the cross beam; a first battery unit 10 and a second battery unit 11 are arranged in the two mounting compartments on the second side of the cross beam, respectively.

It is understood that the above four combination structures all need to adopt the connection manner of the connection row 23 described above to realize the series connection between the internal four battery units.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; such modifications or substitutions do not depart from the scope of the invention in its corresponding aspects. Moreover, those skilled in the art will appreciate that although some embodiments described herein include some features included in other embodiments, not other features, combinations of features of different embodiments are meant to be within the scope of the invention and form different embodiments. For example, any of the claimed embodiments may be used in any combination. The information disclosed in this background section is only for enhancement of understanding of the general background of the invention and should not be taken as an acknowledgement or any form of suggestion that this information constitutes prior art already known to a person skilled in the art.

Claims

1. A battery pack is characterized by comprising a shell, a cross beam, four battery units and a connecting row;

2. The battery pack of claim 1, wherein the battery cells comprise a battery pack and a BMS slave plate;

3. The battery pack of claim 2, wherein the cell assembly further comprises a positive output pole and a negative output pole;

4. The battery pack of claim 3, wherein a positive output electrode and a negative output electrode are respectively disposed on every two first cells adjacent to the cross beam, and the connecting row is connected between the positive output electrode and the negative output electrode on every two first cells adjacent to the cross beam.

5. The battery pack of claim 4, wherein the connecting row is connected between positive and negative output poles on two of the second cells adjacent to the longitudinal gap, and the positive and negative output poles on the other two second cells are used for electrically connecting the battery pack with the outside.

6. The battery pack of claim 5, wherein when the number of the cell assembly is an odd number, the positive output electrode is disposed on the first cell, the negative output electrode is disposed on the second cell, and the positive output electrode and the negative output electrode are disposed at different ends of the cell assembly in a transverse direction of the housing, respectively, a first battery unit is formed;

when the number of the cell assemblies is odd, the positive output electrode is arranged on the second cell, the negative output electrode is arranged on the first cell, and the positive output electrode and the negative output electrode are respectively arranged at different ends of the cell assemblies along the transverse direction of the shell, a second battery unit is formed;

when the number of the electric core assemblies is even, the positive output poles are arranged on the second electric core, the negative output poles are arranged on the first electric core, and the positive output poles and the negative output poles are respectively arranged at the same end of the electric core assemblies along the transverse direction of the shell, so that a fourth battery unit is formed.

7. The battery pack according to claim 6, wherein two of the diagonally located mounting compartments are each provided with the first battery cell, and the other two of the diagonally located mounting compartments are each provided with the second battery cell;

the two second battery units are oppositely turned over by 180 degrees, and the two first battery units are oppositely turned over by 180 degrees.

8. The battery pack according to claim 6, wherein two of the diagonally located mounting compartments are each provided with the third battery cell, and the other two of the diagonally located mounting compartments are each provided with the fourth battery cell;

the two third battery units are turned over by 180 degrees relatively, and the two fourth battery units are turned over by 180 degrees relatively.

9. The battery pack of claim 6, wherein the first battery cell and the second battery cell are disposed within the two mounting compartments of the first side of the cross member;

10. The battery pack of claim 6, wherein the third battery cell and the fourth battery cell are disposed within the two mounting compartments of the first side of the cross member, respectively;