CN119812642A - Battery pack, power-consuming device and method - Google Patents
Battery pack, power-consuming device and method Download PDFInfo
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- CN119812642A CN119812642A CN202510126377.XA CN202510126377A CN119812642A CN 119812642 A CN119812642 A CN 119812642A CN 202510126377 A CN202510126377 A CN 202510126377A CN 119812642 A CN119812642 A CN 119812642A
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
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Abstract
本发明提供一种电池包、用电设备和用于制造电池包的方法，其中，该电池包包括具有横梁和纵梁的箱体，横梁限定多个横排，纵梁限定多个纵列，横梁和纵梁共同限制多个子腔室，在其中相应容纳有电池模组，其中，每一电池模组沿纵向方向包括多个电池排，每一电池排沿横向方向包括多个电池单元，所述电池单元为单个的电池单体或由多个电池单体并联而成，纵向方向平行于纵梁，横向方向平行于横梁，其中，至少一纵列的电池模组以第一连接方式进行电连接，在同一电池模组中，同一电池排的多个电池单元依次电连接并且相邻电池排的同一侧的端部电池单元电连接。在此，减少了电池模组内高压差点，提高了电池包的箱体的内部空间利用率，提高了电池包安全性。
The present invention provides a battery pack, an electrical device and a method for manufacturing a battery pack, wherein the battery pack includes a box body having a crossbeam and a longitudinal beam, the crossbeam defines a plurality of cross rows, the longitudinal beam defines a plurality of longitudinal columns, the crossbeam and the longitudinal beam jointly limit a plurality of sub-chambers, in which battery modules are respectively contained, wherein each battery module includes a plurality of battery rows along the longitudinal direction, each battery row includes a plurality of battery cells along the transverse direction, the battery cells are single battery cells or are formed by connecting a plurality of battery cells in parallel, the longitudinal direction is parallel to the longitudinal beam, and the transverse direction is parallel to the crossbeam, wherein at least one longitudinal column of battery modules is electrically connected in a first connection mode, and in the same battery module, a plurality of battery cells in the same battery row are electrically connected in sequence and the end battery cells on the same side of adjacent battery rows are electrically connected. Here, the high voltage difference in the battery module is reduced, the internal space utilization rate of the box body of the battery pack is improved, and the safety of the battery pack is improved.
Description
Technical Field
The invention relates to the technical field of power batteries and energy storage, in particular to a battery pack, electric equipment comprising the battery pack and a method for manufacturing the battery pack.
Background
A power battery, such as a power battery for a vehicle, may be formed by a series-parallel connection of a certain number of battery cells stacked one on another. With the battery module as a unit, there may be a high pressure difference between the housings or modules of the adjacent battery cells, which is disadvantageous to the operation safety and reliability of the battery pack. Therefore, during the manufacturing process of the battery pack, particularly during the design, manufacturing and use of the high-voltage battery pack, attention is paid and necessary measures are taken to reduce the above-mentioned pressure difference value and improve the operation safety of the battery pack.
It should be noted that what is described herein merely provides background information related to the present disclosure and is not necessarily prior art.
Disclosure of Invention
According to various aspects, it is an object of the present invention to provide a battery pack, a powered device including the battery pack, and a method for manufacturing the battery pack.
In addition, the invention aims to solve or alleviate other technical problems in the prior art.
According to a first aspect of the present application, a battery pack is presented, comprising a case having a cross beam and a longitudinal beam, the cross beam defining a plurality of transverse rows, the longitudinal beam defining a plurality of longitudinal rows, the cross beam and the longitudinal beam together defining a plurality of sub-chambers in which battery modules are respectively accommodated, wherein each battery module comprises a plurality of battery rows in a longitudinal direction, each battery row comprises a plurality of battery cells in a lateral direction, the battery cells being individual battery cells or being formed by a plurality of battery cells connected in parallel, the longitudinal direction being parallel to the longitudinal beam, the lateral direction being parallel to the cross beam,
The battery modules of at least one column are electrically connected in a first connection mode, wherein in the same battery module, a plurality of battery units of the same battery row are sequentially electrically connected, and end battery units of the same side of the adjacent battery row are electrically connected.
In the battery pack according to the first aspect of the present application, optionally, the number of columns of the plurality of columns is an even number, and the battery modules of each column are electrically connected in the first connection manner, respectively, wherein the end battery cells of the battery modules of adjacent columns on the same side in the longitudinal direction are electrically connected to each other such that the positive electrode output terminal and the negative electrode output terminal of the battery pack are on the same side in the longitudinal direction.
In the battery pack according to the first aspect of the present application, optionally, the number of columns of the plurality of columns is an odd number, wherein the battery modules of one column are electrically connected in a second connection manner, and the battery modules of the remaining columns are electrically connected in the first connection manner, wherein in the second connection manner, the battery modules of the column are divided into two sub-columns, the end battery cells of the two sub-columns located on the same side in the longitudinal direction are electrically connected, wherein one sub-column has one battery cell in the lateral direction and is electrically connected in sequence in the longitudinal direction, such that the positive electrode output terminal and the negative electrode output terminal of the battery pack are located on the same side in the longitudinal direction.
In the battery pack according to the first aspect of the present application, optionally, adjacent battery modules are electrically connected by metal tabs that span the cross members or the side members of the case.
In the battery pack set forth in the first aspect of the application, optionally, the metal tab includes a main body portion held on the case and a connection portion protruding from the main body portion, the connection portion being electrically connected to the battery cell, wherein an insulating member is provided on the main body portion or on the case or between the main body portion and the case to form insulating isolation between the case and the metal tab.
In the battery pack according to the first aspect of the present application, optionally, an insulating member is provided at least partially on a side of the case facing the battery cells,
Or the side of the case facing the battery cell is spaced apart from the battery cell by a preset gap to form an insulating isolation.
In the battery pack set forth in the first aspect of the application, optionally, it further includes sampling devices that extend in the longitudinal direction and are disposed on both sides of the battery module.
In the battery pack set forth in the first aspect of the application, optionally, the rated voltage level of the battery pack is 300V or more.
According to a second aspect of the present application, there is also provided a powered device comprising a battery pack as set forth above.
According to a third aspect of the present application, there is also provided a method for manufacturing a battery pack comprising a case having a cross member defining a plurality of transverse rows and a longitudinal member defining a plurality of longitudinal rows, the cross member and the longitudinal member together defining a plurality of sub-chambers in which battery modules are respectively accommodated, wherein each battery module comprises a plurality of battery rows in a longitudinal direction, each battery row comprises a plurality of battery cells in a transverse direction, the battery cells being individual battery cells or being formed by a plurality of battery cells connected in parallel, the longitudinal direction being parallel to the longitudinal member, the transverse direction being parallel to the cross member,
Wherein the method comprises the following steps:
Electrically connecting the battery modules in each column;
The end battery cells of the battery modules of the adjacent column at the same side in the longitudinal direction are electrically connected to each other,
When the battery modules of each column are electrically connected, at least one column of battery modules are electrically connected in a first connection mode, wherein in the same battery module, a plurality of battery units of the same battery row are electrically connected in sequence, and end battery units of the same side of the adjacent battery row are electrically connected.
In the method according to the third aspect of the present application, optionally, when the battery modules of each column are electrically connected, if the number of columns of the plurality of columns is an even number, the battery modules of each column are electrically connected in the first connection manner such that the positive electrode output terminal and the negative electrode output terminal of the battery pack are on the same side in the longitudinal direction.
In the method according to the third aspect of the present application, optionally, when the battery modules of each column are electrically connected, if the number of columns of the plurality of columns is an odd number, the battery modules of one column are electrically connected in the second connection manner, the battery modules of the remaining columns are electrically connected in the first connection manner,
In the second connection mode, the battery modules of the vertical column are divided into two sub-columns, the end battery cells of the two sub-columns, which are positioned on the same side in the longitudinal direction, are electrically connected, one sub-column is provided with one battery cell in the transverse direction and is electrically connected in sequence in the longitudinal direction, so that the positive electrode output terminal and the negative electrode output terminal of the battery pack are positioned on the same side in the longitudinal direction.
In the battery pack, the high-voltage difference point in the battery pack is reduced, the utilization rate of the internal space of the box body of the battery pack is improved, and the operation safety and reliability of the battery pack are improved.
Drawings
The above and other features of the present invention will become apparent with reference to the accompanying drawings, in which,
Fig. 1 shows an embodiment of a battery pack according to the present application;
Fig. 2 shows another embodiment of a battery pack according to the present application;
fig. 3 shows a flow chart of an embodiment of the method according to the application.
Detailed Description
It is to be understood that, according to the technical solution of the present invention, those skilled in the art may propose various alternative structural modes and implementation modes without changing the true spirit of the present invention. Accordingly, the following detailed description and drawings are merely illustrative of the invention and are not intended to be exhaustive or to limit the invention to the precise form disclosed.
Terms of orientation such as up, down, left, right, front, rear, front, back, top, bottom, etc. mentioned or possible to be mentioned in the present specification are defined with respect to the configurations shown in the drawings, which are relative concepts, and thus may be changed according to different positions and different use states thereof. These and other directional terms should not be construed as limiting terms. Furthermore, the terms "first," "second," "third," and the like are used for descriptive and distinguishing purposes only and are not to be construed as indicating or implying a relative importance of the corresponding components.
In a power cell, a certain number of battery cells are stacked in a plurality of rows and columns according to a desired voltage level and are electrically connected in sequence. For example, for high voltage power cells with voltage levels above 300V, there may be a high pressure differential between the housings of adjacent cells in the battery module, which is detrimental to the operational safety and reliability of the battery pack. In general, the required air insulation is established by increasing the gap between adjacent battery cells at the expense of the space utilization within the case, thereby alleviating the operational safety problems caused by high pressure differentials. Or by providing an insulating coating on the outer surface of the case of the battery cell, thereby alleviating the safety problem caused by the high pressure difference, which is, however, disadvantageous in terms of cost.
There is a need to provide an improved battery pack that avoids the operational safety issues associated with high voltage differentials by providing an improved topology in the present application.
Before describing the present application in detail with reference to the accompanying drawings, it should be noted that the battery pack mentioned in the present disclosure may be a power battery for vehicles, particularly a high-voltage power battery, having a rated voltage level of 300V or more, for example, 400V, 600V, 800V or more. The battery pack has a plurality of battery modules, wherein the battery modules are a combination or assembly having a certain number of battery cells electrically connected to each other.
The battery cells mentioned in this disclosure may then be individual battery cells, which comprise an outer housing and an inner cell assembly accommodated in the housing. The battery cell may be, but is not limited to, a lithium ion battery cell, such as a lithium ion primary battery or a lithium ion secondary battery. Further, the battery cell may be, but is not limited to, a prismatic battery cell or a cylindrical battery cell. Specifically, in a prismatic battery cell, a positive electrode tab and a negative electrode tab are provided on the same side or the same wall thereof, i.e., the two are adjacently arranged. Or in the prismatic battery cell, the positive electrode tab and the negative electrode tab are separately provided on both sides or both walls opposite to each other, i.e., both are opposite to each other. In the cylindrical battery cell, the side surface of the housing is a circumferential surface.
In addition, the battery cell mentioned in the present disclosure may also be a cell formed by connecting a plurality of battery cells in parallel, which is electrically connected with adjacent battery cells as a whole, as compared to a battery cell that is a single battery cell. Illustratively, the battery cell is formed by connecting two or more battery cells in parallel, and integrally has a positive terminal (analogous to the positive electrode post described above) and a negative terminal (analogous to the negative electrode post described above).
Furthermore, the electrical consumers mentioned in this disclosure refer to devices having an energy storage device and an electrical consumer that needs to be supplied with electrical energy by the energy storage device. The powered device may be, but is not limited to, a new energy vehicle, such as a pure electric vehicle.
Hereinafter, the present application is explained in detail with respect to a battery pack composed of a plurality of battery cells, which are individual prismatic battery cells, wherein positive and negative electrode tabs of the prismatic battery cells are arranged on the top surface. The disclosure set forth herein for prismatic cells can be transferred to cylindrical cells in a similar manner. Furthermore, what has been described for a battery cell that is a single prismatic battery cell can be transferred in a similar manner to a battery cell that is formed by a plurality of battery cells in parallel.
Fig. 1 schematically shows an embodiment of a battery pack according to the present application. The battery pack 100 includes a rectangular case 110 including wall portions 111, cross members 112, and side members 113. The wall 111 defines a rectangular receiving cavity on the outside, the cross-beams 112 defining two transverse rows extending in the transverse direction Y, and the stringers 113 defining two longitudinal rows extending in the longitudinal direction X. The transverse beams 112 may also be referred to herein as transverse ribs, and the longitudinal beams 113 may also be referred to herein as longitudinal ribs. The cross member 112 and the side member 113 are perpendicular and divide the receiving chamber into four sub-chambers for receiving the battery module 120. It should be understood that the structure of the case, the structure of the sub-chambers, the number of rows, and the number of columns are not particularly limited in the embodiment of the present application, and may be selected as needed. Further, the "plurality" mentioned in the present disclosure is equal to or greater than 2 in number.
The case 110 may be one-piece, with the wall 111, the cross member 112, and the side members 113 being integrally formed, for example, from a metallic material. Instead of the one-piece case, a multi-piece case 110 is used, i.e. it is assembled from a plurality of separately formed parts.
The case 110 may be attached to the battery pack 100 only, i.e., the battery pack 100 as a whole is mounted to the electric device after the case 110, the battery cells 121 (which are schematically represented by rectangular frames in the drawings) accommodated therein, and other accessories are assembled.
It is also possible that the housing 110 or a part thereof is formed by an electrical consumer. In the case where the powered device is an automobile, a portion of the chassis of the automobile may illustratively form a portion of the housing 110, such as a portion of the floor of the automobile being a portion of the housing 110. The battery module or the battery cells contained therein can be glued to the upper or lower vehicle floor in order to be supported in the housing.
The battery pack 100 shown in fig. 1 includes two columns of battery modules, i.e., a first column of battery modules located on the right side and a second column of battery modules located on the left side, wherein each column of battery modules includes two battery modules 120 arranged in the longitudinal direction X, respectively. The battery module 120 includes a plurality of battery rows extending in the lateral direction Y in the longitudinal direction X, respectively, each of which includes two battery cells 121. Specifically, the battery module 120 located at the upper part of fig. 1 includes 14 battery cells 121, i.e., 7 battery rows, respectively, each of which includes two battery cells 121. The battery module 120 located at the lower part of fig. 1 includes 12 battery cells 121, i.e., 6 battery rows, each including two battery cells 121, respectively.
In the embodiment shown in the drawings, the battery cells 121 are prismatic battery cells, wherein all the prismatic battery cells are connected in series in order to achieve the rated voltage of the battery pack.
It is also possible that the battery unit 121 is a unit formed by connecting two or more battery cells in parallel, wherein all the battery cells are connected in series in order to achieve the rated voltage of the battery pack.
It is also possible that one part of the battery cells 121 is a square battery cell and the other part is a cell formed by connecting two or more battery cells in parallel, and the battery cells in the two configurations are sequentially connected in series to achieve the rated voltage of the battery pack. Specifically, in a battery module, the configuration of the battery cells is selected in units of battery rows, for example, a part of the battery rows include battery cells each of which is a single prismatic battery cell, and the remaining battery rows include battery cells each of which is formed by connecting a plurality of prismatic battery cells in parallel.
It should be understood that the embodiments herein with respect to the number of battery cells included in the battery pack, the number of battery modules, the arrangement of the battery cells, and the number of battery cells included in the battery cells are merely exemplary, and are not limiting, and may be modified as needed. The total number of the battery units is related to the required voltage level of the battery pack, the number of the battery modules is related to the box structure, and the arrangement mode of the battery units is related to the box structure or the structure of the battery units.
Referring again to fig. 1, in which an electrical connection path, i.e., a current path, is indicated by a solid black line, the battery cells included in the first column battery module located on the right side are connected in series with each other in a first connection manner (i.e., an S-type connection manner). Specifically, in the same battery module 120, the plurality of battery cells 121 of the same battery row are connected in series in turn with the same polarity and in an end-to-end manner, for example, electrically connected by metal tabs (e.g., copper or aluminum tabs) running parallel to the transverse direction Y. In the same battery module 120, the battery cells 121 of adjacent battery rows are oriented in opposite polarity, so that the end battery cells 121 on the same side (i.e., the battery cells on the leftmost side or the rightmost side) can be connected in series in sequence in an end-to-end manner, for example, electrically connected by metal tabs (e.g., copper or aluminum tabs) running parallel to the longitudinal direction X. The two end battery cells 121 of the adjacent battery modules (i.e., the last battery cell of the previous battery module and the first battery cell of the next battery module along the current path) have opposite polarities so that they can be directly electrically connected in an end-to-end manner. In addition, as with the first tandem battery module located on the right side, the second tandem battery module located on the left side is electrically connected in the first connection manner.
The metal tabs for electrical connection of the end cells 121 of adjacent battery modules span the cross members 112 or stringers 113 of the case, which may also be referred to as bridging metal tabs. The bridging metal tabs may be single layer hard metal rows or multi-layer metal soft rows. The bridging metal strip may be fastened to the cross-beam 112 or the longitudinal beam 113 of the box, for example, by means of an insulating adhesive tape, or by means of an insulating clip. Furthermore, it is also possible for the bridging metal strip to span over the transverse beam 112 or the longitudinal beam 113 without being fastened to the transverse beam 112 or the longitudinal beam 113, for example, it being held on the transverse beam 112 or the longitudinal beam 113 by a fastening action with the battery cell.
The battery module is used as a unit for observation, through the first connection mode, the pressure difference between the shells of the adjacent battery units (the shells of the battery units when the battery units are single battery units and the shells of the battery units at the end parts when the battery units are formed by connecting a plurality of battery units in parallel) is smaller, so that the high-pressure difference point in the battery pack is reduced, and the overall safety and reliability of the battery pack are improved. Then, due to the reduction of the high-voltage difference point and the reduction of the voltage difference, the insulation requirement is reduced, so that the preset gap between the adjacent battery units can be correspondingly reduced, and the utilization rate of the internal space of the box body is improved. In addition, by the first connection mode, the battery units with high pressure difference possibly existing in the battery pack are separated by the longitudinal beams of the box body, so that the operation is convenient, and safety problems caused by the high pressure difference are avoided by taking insulation protection measures on the longitudinal beams of the box body.
In an alternative embodiment, the bridging metal tab includes a main body portion that is held on the cross beam 112 or the side beam 113 of the case, and two connection portions that protrude from the main body portion and are electrically connected to the posts (or terminals) of the battery cells 121. The body portion is illustratively secured to the cross member 112 or the side member 113, or the body portion is retained to the cross member 112 or the side member 113 by means of the connection portion to the battery cell, with or without contact (i.e., suspension) of the body portion to the cross member 112 or the side member 113. Wherein an insulating member is provided on the main body portion at a region of the cross member 112 or the side member 113 of the case for contact with the main body portion so as to form an insulating separation between the case and the metal strip.
Illustratively, the insulator may be an insulating film that is adhered to the body portion or the cross member 112 or the side member 113. The insulating film may relate to, but is not limited to, a PET (polyethylene terephthalate) film, a PP (polypropylene) film, or a PVC (polyvinyl chloride) film.
Illustratively, it is also possible that the insulation is an insulating coating, which may involve, but is not limited to, an acrylic resin, an epoxy resin, or a polyurethane resin. The insulating coating may be applied to the body portion or the cross member 112 or the longitudinal member 113 by spraying, ink-jet printing or 3D printing an insulating material.
Illustratively, it is also possible that the insulating member is an insulating glue comprising a base material layer and a UV glue layer laminated to each other, wherein the UV glue layer is adhered to the main body portion or the cross beam 112 or the longitudinal beam 113 of the case. Here, the base material layer of the insulating paste may relate to, but is not limited to, PET (polyethylene terephthalate) film, PI (polyimide) film, PP (polypropylene) film, PVC (polyvinyl chloride) film, PE (polyethylene) film, PC (polycarbonate) film. The composition of the UV glue layer of the insulating glue may comprise an epoxy resin, a photoinitiator and optionally a dye, which materials form the UV glue layer after being coated on the above-mentioned substrate layer in a UV-light activated manner or in a UV-light cured manner or in any other feasible manner.
Furthermore, it is also possible to provide an insulation element, which is, for example, an insulating sheet and is fastened to the cross beam 112 or the longitudinal beam 113 of the box, between the main body of the bridging metal strip and the cross beam 112 or the longitudinal beam 113 of the box.
In the battery pack 100 according to the present application, an insulating member is provided on the side of the case 110 facing the battery cells 121 in addition to the insulating protection measures taken for the crossover points, so as to improve the insulating performance between the case and the battery cells. The insulation described above is provided, for example, on the inner side of the wall 111 of the housing 110, on the sides of the transverse beam 112 facing the battery cells 121, on the sides of the longitudinal beam 113 facing the battery cells 121.
In one possible embodiment, the insulation described above covers, by way of example, the wall 111 of the housing 110, the cross members 112 and the partial areas of the longitudinal members 113, which correspond to the insulating weak areas of the battery cells. Specifically, when the battery cell is a prismatic battery cell, the insulation weak area is, for example, a transition area of a top surface and a side surface of the battery cell or a transition area of a side surface and a bottom surface of the battery cell.
In another possible embodiment, the side of the case 110 facing the battery cell 121 is illustratively spaced apart from the battery cell by a preset gap, i.e., there is the preset gap between the side of the case and the outer surface of the battery cell facing the side, so as to form an insulating isolation protection between the case and the battery cell.
In a further possible embodiment, the insulation is chosen illustratively according to the actual clearance of the housing 110 from the battery cells 121 accommodated therein, wherein the insulation described above is provided on the side of the housing 110 facing the battery cells 121 when said actual clearance is below a certain value (e.g. less than 12 mm) in order to establish an insulating isolation protection.
As can also be seen from fig. 1, the two vertical rows of battery modules are electrically connected in the first connection manner, and the positive output terminal (which is indicated by "+" in the drawing) and the negative output terminal (which is indicated by "-" in the drawing) of the battery pack 100 are located on the same side of the case 110, i.e., on the upper side in the longitudinal direction X in the drawing. The configuration scheme of the same-side output of the battery pack has a smaller high-voltage loop area, so that the safety is improved, and meanwhile, the battery pack is convenient to reliably connect with a power supply port of electric equipment.
In summary, if the battery pack 100 includes an even number of columns, each column of battery modules is electrically connected in the first connection manner, so that the positive output terminal and the negative output terminal of the battery pack 100 are located on the same side, thereby ensuring the operation safety of the battery pack and simultaneously considering the application flexibility.
Fig. 2 shows another embodiment of a battery pack according to the present application. The battery pack 100 includes three tandem battery modules, i.e., a first tandem battery module located on the right side, a second tandem battery module located in the middle, and a third tandem battery module located on the left side. The first tandem battery module and the second tandem battery module are electrically connected in the first connection mode (i.e., the S-type connection mode), and the third tandem battery module is electrically connected in the second connection mode, so that the positive and negative output terminals of the battery pack 100 are located at the same side in the longitudinal direction X. In the second connection mode, the third column battery module is divided into two sub-columns, each sub-column includes only one battery cell 121 in the lateral direction Y, the battery cells of each sub-column are electrically connected in sequence along the longitudinal direction X, and the end battery cells 121 of the two sub-columns located on the same side along the longitudinal direction X are electrically connected.
In the battery pack 100 shown in fig. 2, the pressure difference between the cases of the adjacent battery cells in the first and second column battery modules is significantly smaller, and the number of high-pressure difference points is reduced. For a slightly higher pressure difference in the third tandem battery module, which is between the cases of the two battery cells adjacent to the positive output terminal of the battery pack, it is possible to take measures to replace the insulating films of the outer surfaces of the cases of the two battery cells 121 with insulating coatings having good insulation properties or to correspondingly increase the width of the sub-chambers of the third tandem battery module and the gaps between the adjacent battery cells in the lateral direction Y. In this case, only a part of the case or a part of the battery module is required to be modified, so that the overall operation safety of the battery pack can be improved at a low cost.
In a modification of fig. 2, the first column battery modules located on the right side are electrically connected in the second connection manner, and the second column battery modules located in the middle and the third column battery modules located on the left side are connected in the first connection manner. It is also possible that the second column battery module located in the middle is electrically connected in the second connection manner, and the first column battery module located on the right side and the third column battery module located on the left side are connected in the first connection manner.
In general, if the battery pack 100 includes an odd number of columns, the battery modules of one column are electrically connected in the second connection manner, and the battery modules of the remaining columns are electrically connected in the first connection manner such that the positive output terminal and the negative output terminal of the battery pack 100 are located at the same side in the longitudinal direction X.
In another possible embodiment, unlike fig. 2, the three column battery modules of the battery pack 100 are all electrically connected using the first connection method, the negative output terminal is located at the upper side in the longitudinal direction X, and the positive output terminal is located at the opposite lower side in the longitudinal direction X. Here, the positive output terminal located at the lower side may be led to the upper side or vice versa by an additional conductive member.
In the battery pack 100 according to the present application, there is also provided a sampling device for measuring the relevant parameters of the battery cells 121 (e.g., the temperature and voltage of the battery cells). The sampling device may be a sampling harness or a flexible circuit board which extends in the longitudinal direction X and is arranged on both sides of the battery module 120, i.e., runs adjacent to the case 110 or the stringers 113 thereof, whereby a short-distance sampling line connection can be achieved, making full use of the internal space of the case 110. Specifically, referring to fig. 1, a sampling harness as a sampling device runs in a straight line, adjacent to the longitudinal beam 113 and a portion of the wall portion 111 extending in the longitudinal direction X.
According to a second aspect of the present application, there is also provided a powered device comprising a battery pack as set forth above. The powered device may be, but is not limited to, the new energy automobile mentioned above. The advantages and features already described with respect to the battery pack according to the application can be achieved in particular by the consumer according to the application, and reference is made accordingly to the description of the battery pack according to the application.
Furthermore, according to a third aspect of the application, a method for manufacturing a battery pack, in particular a battery pack according to any of the embodiments set forth above, is also proposed, which comprises the following steps according to fig. 3:
S100, electrically connecting the battery modules in each column;
s200 of electrically connecting end battery cells of the battery modules of the adjacent columns to each other at the same side in the longitudinal direction,
When the battery modules of each column are electrically connected, at least one column of battery modules are electrically connected in a first connection mode, wherein in the same battery module, a plurality of battery units of the same battery row are electrically connected in sequence, and end battery units of the same side of the adjacent battery row are electrically connected.
Here, for example, if the battery cells included in the battery module are single battery cells, the battery cells are directly connected in series in step S100, and if at least a part of the battery cells included in the battery module are cells formed by connecting a plurality of battery cells in parallel, the battery cells in the battery cells are first connected in parallel and then the battery cells are connected in series in step S100.
In a possible embodiment, in the step S100, if the number of columns of the plurality of columns is an even number, the battery modules of each column are electrically connected in the first connection manner. Reference is made to the above description of the battery pack according to the present application, and the description thereof will not be repeated.
In another possible embodiment, in the step S100, if the number of columns of the plurality of columns is an odd number, the battery modules in one column are electrically connected in the second connection manner, and the battery modules in the remaining columns are electrically connected in the first connection manner. Reference is made to the above description of the battery pack according to the present application, and the description thereof will not be repeated.
The advantages and features already described with respect to the battery pack according to the application can be achieved in particular by the consumer according to the application, and reference is made accordingly to the description of the battery pack according to the application.
It should be understood that all of the above preferred embodiments are exemplary and not limiting, and that various modifications, variations, or combinations of the above described specific embodiments, within the spirit of the invention, should be made by those skilled in the art within the scope of legal protection of this invention.
Claims (12)
1. A battery pack comprising a case having a cross member defining a plurality of transverse rows and a longitudinal member defining a plurality of longitudinal rows, the cross member and the longitudinal member together defining a plurality of sub-chambers in which battery modules are respectively accommodated, wherein each battery module comprises a plurality of battery rows in a longitudinal direction, each battery row comprises a plurality of battery cells in a transverse direction, the longitudinal direction is parallel to the longitudinal member, the transverse direction is parallel to the cross member, the battery cells are individual battery cells or are formed by connecting a plurality of battery cells in parallel,
The battery module is characterized in that at least one column of battery modules is electrically connected in a first connection mode, wherein in the same battery module, a plurality of battery units of the same battery row are sequentially electrically connected, and end battery units of the same side of the adjacent battery row are electrically connected.
2. The battery pack according to claim 1, wherein the number of columns of the plurality of columns is an even number, and the battery modules of each column are electrically connected in the first connection manner, respectively, wherein the end battery cells of the battery modules of adjacent columns on the same side in the longitudinal direction are electrically connected to each other such that the positive electrode output terminal and the negative electrode output terminal of the battery pack are on the same side in the longitudinal direction.
3. The battery pack according to claim 1, wherein the number of columns of the plurality of columns is an odd number, wherein the battery modules of one column are electrically connected in a second connection manner, and the battery modules of the remaining columns are electrically connected in the first connection manner, wherein in the second connection manner, the battery modules of the column are divided into two sub-columns, the end battery cells of the two sub-columns located on the same side in the longitudinal direction are electrically connected, wherein one sub-column includes one battery cell in the lateral direction and is electrically connected in sequence in the longitudinal direction such that the positive electrode output terminal and the negative electrode output terminal of the battery pack are located on the same side in the longitudinal direction.
4. The battery pack of claim 1, wherein adjacent battery modules are electrically connected by metal tabs that span a cross or longitudinal beam of the case.
5. The battery pack of claim 4, wherein the metal tab comprises a body portion and a connection portion extending from the body portion, the body portion being retained on the case, the connection portion being electrically connected to the battery cell, wherein an insulator is provided on the body portion or on the case or between the body portion and the case to form an insulating barrier between the case and the metal tab.
6. The battery pack according to claim 1, wherein an insulating member is provided at least partially on a side of the case facing the battery cell,
Or the side of the case facing the battery cell is spaced apart from the battery cell by a preset gap to form an insulating isolation.
7. The battery pack according to claim 1, further comprising sampling devices extending in the longitudinal direction and disposed on both sides of the battery module.
8. The battery pack of claim 1, wherein the rated voltage level of the battery pack is 300V or more.
9. A powered device characterized in that it comprises a battery pack according to any one of claims 1 to 8.
10. A method for manufacturing a battery pack comprising a case having a cross member defining a plurality of transverse rows and a longitudinal member defining a plurality of longitudinal rows, the cross member and the longitudinal member together defining a plurality of sub-chambers in which battery modules are respectively accommodated, wherein each battery module comprises a plurality of battery rows in a longitudinal direction, each battery row comprises a plurality of battery cells in a transverse direction, the battery cells being individual battery cells or being formed by a plurality of battery cells connected in parallel, the longitudinal direction being parallel to the longitudinal member, the transverse direction being parallel to the cross member,
Characterized in that the method comprises the following steps:
Electrically connecting the battery modules in each column;
The end battery cells of the battery modules of the adjacent column at the same side in the longitudinal direction are electrically connected to each other,
When the battery modules of each column are electrically connected, at least one column of battery modules are electrically connected in a first connection mode, wherein in the same battery module, a plurality of battery units of the same battery row are electrically connected in sequence, and end battery units of the same side of the adjacent battery row are electrically connected.
11. The method according to claim 10, wherein when the battery modules of each column are electrically connected, if the number of columns of the plurality of columns is an even number, the battery modules of each column are electrically connected in the first connection manner such that the positive electrode output terminal and the negative electrode output terminal of the battery pack are on the same side in the longitudinal direction.
12. The method according to claim 10, wherein when the battery modules of each column are electrically connected, if the columns of the plurality of columns are odd, the battery modules of one column are electrically connected in the second connection manner, the battery modules of the remaining columns are electrically connected in the first connection manner,
In the second connection mode, the battery modules of the vertical column are divided into two sub-columns, the end battery cells of the two sub-columns, which are positioned on the same side in the longitudinal direction, are electrically connected, one sub-column is provided with one battery cell in the transverse direction and is electrically connected in sequence in the longitudinal direction, so that the positive electrode output terminal and the negative electrode output terminal of the battery pack are positioned on the same side in the longitudinal direction.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202510126377.XA CN119812642A (en) | 2025-01-26 | 2025-01-26 | Battery pack, power-consuming device and method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202510126377.XA CN119812642A (en) | 2025-01-26 | 2025-01-26 | Battery pack, power-consuming device and method |
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| CN119812642A true CN119812642A (en) | 2025-04-11 |
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| CN202510126377.XA Pending CN119812642A (en) | 2025-01-26 | 2025-01-26 | Battery pack, power-consuming device and method |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN120109400A (en) * | 2025-05-07 | 2025-06-06 | 宁德时代新能源科技股份有限公司 | Battery devices and electrical equipment |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN120109400A (en) * | 2025-05-07 | 2025-06-06 | 宁德时代新能源科技股份有限公司 | Battery devices and electrical equipment |
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