Battery pack

Abstract

The utility model provides a battery pack. The battery pack comprises a battery module; the battery management assembly is connected with the battery module, and the battery management assembly comprises a printed circuit board, a positive busbar, a negative busbar and a flexible circuit board; wherein one end of the positive electrode busbar and one end of the negative electrode busbar are connected with the battery module, the other end of the positive electrode busbar and the other end of the negative electrode busbar are connected with the printed circuit board, and the flexible circuit board is connected with the positive electrode busbar, the negative electrode busbar, the battery module and the printed circuit board. Materials such as an adapter connector are omitted, the production cost and the assembly cost of the battery pack are greatly reduced, and the effects of reducing the cost and simplifying the assembly process are achieved.

Description

Technical Field

[0001] The present invention relates to the field of batteries, and more particularly to a battery pack Background Art

[0002] As the requirements for battery energy density in automobiles become higher and higher, battery assembly technology also needs to be continuously optimized. The market has also put forward new requirements for the manufacturing cost, process reliability and process simplicity of lithium batteries. At present, the electrical connection structure of power battery modules has a large number of parts such as copper busbars and bolts, and the structure is complex, which increases the overall size of the module, manufacturing cost and assembly cost, resulting in high production and assembly costs. Utility Model Content

[0003] In view of this, the present application provides a battery pack, which can reduce the production cost and assembly cost of the battery pack, thereby achieving the effect of reducing costs and simplifying processes.

[0004] To solve the above problems, the technical solutions provided by this application are as follows:

[0005] The present application provides a battery pack, comprising:

[0006] Battery modules; and

[0007] A battery management component connected to the battery module, the battery management component comprising: a printed circuit board, a positive bus bar, a negative bus bar and a flexible circuit board;

[0008] Among them, one end of the positive bus and the negative bus is connected to the battery module, and the other end is connected to the printed circuit board, and the flexible circuit board is respectively connected to the positive bus, the negative bus, the battery module and the printed circuit board.

[0009] In an optional embodiment of the present application, the battery pack includes:

[0010] A plastic bracket, arranged between the printed circuit board and the battery module along a first direction;

[0011] The battery module includes a plurality of batteries arranged in a second direction intersecting the first direction, the batteries include a positive electrode and a negative electrode, the positive electrode bus is connected to the positive electrode of the first or last battery arranged along the second direction, and the negative electrode bus is connected to the negative electrode of the first or last battery arranged along the second direction.

[0012] In an optional embodiment of the present application, a plurality of connecting busbars are further provided on the plastic bracket. In addition to the positive electrode bus and the negative electrode bus connecting the positive electrode and the negative electrode of the battery, the connecting busbar connects the positive electrode of one of the two adjacent batteries and the negative electrode of the other battery.

[0013] In an optional embodiment of the present application, the flexible circuit board includes a first flexible circuit board, and the positive electrode, the negative electrode and the first flexible circuit board of the battery are located on the same side; the first flexible circuit board is respectively connected to the positive bus, the negative bus, the battery module and the printed circuit board.

[0014] In an optional embodiment of the present application, the positive electrode and the negative electrode of the battery are located at opposite ends of the battery; the flexible circuit board includes a first flexible circuit board and a second flexible circuit board, the first flexible circuit board is respectively connected to the positive bus bar, the negative bus bar, the battery module and the printed circuit board, and the second flexible circuit board is respectively connected to the connecting bus bar, the battery module and the printed circuit board; wherein,

[0015] The first flexible circuit board, the positive bus bar and the negative bus bar are located on the same side of the printed circuit board, and the second flexible circuit board is located on a side of the printed circuit board away from the first flexible circuit board.

[0016] In an optional embodiment of the present application, the battery pack includes:

[0017] A housing, comprising an upper cover and a lower cover arranged along the first direction, wherein the upper cover and the lower cover form a receiving cavity, and the battery module, the battery management assembly and the plastic bracket are arranged in the receiving cavity along the first direction;

[0018] A first connection row and a second connection row are provided on a side of the upper cover away from the battery module, and parts of the first connection row and the second connection row penetrate the upper cover and are connected to the printed circuit board.

[0019] In an optional embodiment of the present application, the upper cover is recessed with a plurality of mounting grooves on a side close to the battery module, and some of the first connecting rows and the second connecting rows are respectively arranged in the mounting grooves along the first direction, and another part of the first connecting rows and the second connecting rows pass through the mounting grooves to be connected to the printed circuit board.

[0020] In an optional embodiment of the present application, the upper cover further includes:

[0021] The first output stud and the second output stud are located in the installation groove, the first output stud is connected to the side of the first connection row away from the battery module, and the second output stud is connected to the side of the second connection row away from the battery module.

[0022] In an optional embodiment of the present application, the mounting groove has an mounting height along the first direction, and a cross-section along the first direction after a portion of the first connecting row located in the mounting groove and the first output stud are connected has a first arrangement height, and a cross-section along the first direction after a portion of the second connecting row located in the mounting groove and the second output stud are connected has a second arrangement height, and both the first arrangement height and the second arrangement height are less than or equal to the mounting height.

[0023] In an optional embodiment of the present application, the upper cover further includes:

[0024] The communication connector comprises a connection port and a connection pin, wherein the connection port is located on a side of the upper cover away from the battery module, the connection pin is partially located in the connection port, and the other part passes through the upper cover and is connected to the printed circuit board.

[0025] In an optional embodiment of the present application, the upper cover, the first connection row, the second connection row, the first output stud, the second output stud and the communication connector are integrally injection molded.

[0026] In an optional embodiment of the present application, the printed circuit board is arranged relatively parallel to the upper cover and the lower cover, the positive bus, the negative bus and the flexible circuit board extend from the edge of the printed circuit board along the first direction into the accommodating cavity and are connected to the battery module, wherein the positive and negative electrodes of the plurality of batteries are located at one end or two opposite ends of the battery along a third direction, and the third direction intersects with the first direction and the second direction respectively.

[0027] In an optional embodiment of the present application, a plurality of placement grooves are provided on a side of the lower cover close to the battery module, the plurality of placement grooves are arranged along the second direction, and the plurality of batteries are arranged in the placement grooves along the second direction.

[0028] In an optional embodiment of the present application, the plastic bracket further includes:

[0029] A plurality of fixing parts are arranged along the second direction, the fixing parts are located on the side of the plastic bracket facing the battery module, the plurality of fixing parts correspond to the plurality of batteries one by one, and the fixing parts are configured to surround and fix part of the batteries.

[0030] In an optional embodiment of the present application, the printed circuit board is welded to the shell.

[0031] The battery pack provided by the present application includes at least the following beneficial effects: a battery module; and a battery management component connected to the battery module, the battery management component including: a printed circuit board, a positive bus bar, a negative bus bar and a flexible circuit board; wherein one end of the positive bus bar and the negative bus bar are connected to the battery module, and the other end is connected to the printed circuit board, and the flexible circuit board is respectively connected to the positive bus bar, the negative bus bar, the battery module and the printed circuit board. Materials such as adapter connectors, adapter copper bars, bolts and nuts are omitted, which greatly reduces the production cost and assembly cost of the battery pack, and achieves the effect of reducing costs and simplifying assembly processes. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For those skilled in the art, other drawings can be obtained based on these drawings without paying any creative work.

[0033] Figure 1 A schematic diagram of the structure of a battery pack provided in one embodiment of the present application.

[0034] Figure 2 An exploded structural diagram of a battery pack provided in accordance with an embodiment of the present application.

[0035] Figure 3 An exploded top view of a battery pack provided in accordance with an embodiment of the present application.

[0036] Figure 4A , 4B A schematic diagram of the structure of a top cover provided in one embodiment of the present application.

[0037] Figure 5 A schematic diagram of the structure of a lower cover provided in one embodiment of the present application.

[0038] Figure 6 A schematic structural diagram of a plastic bracket provided in one embodiment of the present application.

[0039] Figure markings: 100-battery pack; 10-shell; 101-upper cover; 1011-first connecting row; 1012-second connecting row; 1013-first output stud; 1014-second output stud; 1015-communication connector; 10151-connection port; 10152-connection pin; 1016, mounting slot; 102-lower cover; 1021-placement slot; 20-battery management assembly; 201-printed circuit board; 202-positive bus bar; 203-negative bus bar; 204-flexible circuit board; 2041-first flexible circuit board; 2042-second flexible circuit board; 30-plastic bracket; 301-fixing part; 40-battery module; 401-battery; 50-connection bus bar. DETAILED DESCRIPTION

[0040] The technical solutions in the embodiments of the present application will be described clearly and completely below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the present application.

[0041] In the description of the present application, it should be understood that the orientation or positional relationship indicated by the terms "upper", "lower", etc. is based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present application. In addition, the terms "first" and "second" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present application, the meaning of "multiple" is two or more, unless otherwise clearly and specifically defined.

[0042] The present application may repeat reference numerals and / or reference letters in different implementations. Such repetition is for the purpose of simplicity and clarity and does not in itself indicate the relationship between the various implementations and / or settings discussed.

[0043] The battery pack provided in the present application will be described in detail below in conjunction with specific embodiments and drawings. In one embodiment, the battery pack includes, for example, cylindrical batteries.

[0044] See also Figure 1 , Figure 2 and Figure 3 The present application provides a battery pack 100, including:

[0045] A battery module 40; and

[0046] A battery management component 20 is connected to the battery module 40, and the battery management component 20 includes: a printed circuit board 201, a positive bus bar 202, a negative bus bar 203 and a flexible circuit board 204;

[0047] Among them, one end of the positive bus 202 and the negative bus 203 are connected to the battery module 40, and the other end is connected to the printed circuit board 201, and the flexible circuit board 204 is respectively connected to the positive bus 202, the negative bus 203, the battery module 40 and the printed circuit board 201.

[0048] Specifically, the printed circuit board 201 is, for example, a printed circuit board (PCB), which is used to transmit current, voltage or temperature signals and read the current, voltage and temperature of the battery module 40. The flexible circuit board 204 is, for example, a flexible printed circuit (FPC), which is used to collect the voltage and temperature of the battery module 40.

[0049] In one embodiment, the printed circuit board 201 is provided with a plurality of MOS switches for controlling the start and stop of current output.

[0050] In the related art, an adapter connector is also provided on the printed circuit board (PCB), and the collection lines for collecting voltage and temperature connect the adapter connector and the bus (positive and negative bus and series-parallel bus) to realize signal transmission and data reading. In the related art, the collection lines and the adapter connector are connected in a plug-in manner.

[0051] In an embodiment of the present application, the flexible circuit board 204 is welded to the positive bus 202, the negative bus 203, the battery module 40 and the printed circuit board 201, respectively. In one embodiment, the flexible circuit board 204 is also connected to the connecting bus 50 (described below). The flexible circuit board 204 is used to collect the voltage and temperature of the battery module 40. The flexible circuit board 204 is directly connected to the printed circuit board 201, and the adapter connector structure is omitted to reduce the production cost and assembly process. At the same time, the flexible circuit board 204 is welded to the printed circuit board 201. Compared with the plug-in docking method of the related technology, the welding connection is more stable.

[0052] Furthermore, in the related art, the positive busbar and the negative busbar are connected to the printed circuit board through the transfer copper busbar, and the positive busbar and the negative busbar are bolted to the transfer copper busbar. In the embodiment of the present application, the positive busbar 202 and the negative busbar 203 are directly welded to the printed circuit board 201, saving parts such as the transfer copper busbar, bolts and nuts, achieving the effect of reducing costs and simplifying the process.

[0053] In an optional embodiment of the present application, the battery pack 100 includes:

[0054] The plastic bracket 30 is disposed between the printed circuit board 201 and the battery module 40 along the first direction Y;

[0055] The battery module 40 includes a plurality of batteries 401 arranged along a second direction X intersecting the first direction Y, the batteries 401 include a positive electrode and a negative electrode, the positive electrode bus 202 is connected to the positive electrode of the first or last battery arranged along the second direction X, and the negative electrode bus 203 is connected to the negative electrode of the first or last battery arranged along the second direction X. Specifically, the plastic bracket 30 plays an insulating role and improves the strength of the battery pack 100.

[0056] In an optional embodiment of the present application, a plurality of connecting busbars 50 are further provided on the plastic bracket 30. In addition to the positive electrode and negative electrode of the battery connected by the positive electrode bus 202 and the negative electrode bus 203, the connecting busbar 50 connects the positive electrode of one of the two adjacent batteries and the negative electrode of the other battery.

[0057] Specifically, the battery 401 includes a positive electrode and a negative electrode, which are respectively located at the two ends of the battery 401. The positive electrodes and negative electrodes of the multiple batteries of the battery module 40 are staggered along the second direction X. The positive electrode column and the negative electrode column of the battery 401 are respectively located at the two ends of the battery 401. The positive bus 202 is connected to the positive electrode column of the battery 401, and the negative bus 203 is connected to the negative electrode column of the battery 401, and is located on the same side of the printed circuit board 201. Multiple positive and negative electrode columns that are not connected to the positive bus 202 and the negative bus 203 are respectively connected through the connecting bus 50 to form a battery module, and a current loop is formed between the multiple batteries 401 through the connecting bus 50.

[0058] In one embodiment, the number of the batteries 401 is, for example, 4, and the positive poles and negative poles of the 4 batteries 401 are arranged alternately along the second direction X, the positive bus 202 is connected to the positive pole of the outermost battery 401 of the 4 batteries 401, and the negative bus 203 is connected to the negative pole of the other outermost battery 401, and the positive and negative poles of the positive bus 202, the negative bus 203, and the batteries connected thereto are all located on the same side, and the positive poles and negative poles of the two middle batteries 401 are connected by a connecting bus 50. The negative pole at one end of the outermost battery 401 away from the positive bus 202 is connected to the positive pole of the adjacent battery 401 by the connecting bus 50, and the positive poles and negative poles of the other two batteries are connected by the connecting bus 50 to form a current loop, but the connection method of the connecting bus 50 is not limited thereto, and the specific method shall be subject to actual application.

[0059] In one embodiment, the positive busbar 202 , the negative busbar 203 and the connecting busbar 50 are made of aluminum material, for example, but not limited thereto, and are used to collect, collect or transmit the current of the battery module 40 .

[0060] In one embodiment, a shunt is integrated on the printed circuit board 201 , and the current is transmitted to the first connection bar 1011 or the second connection bar 1012 via the shunt.

[0061] In an optional embodiment of the present application, the positive electrode and the negative electrode of the battery 401 are located at the same end of the battery 401; the flexible circuit board 204 includes a first flexible circuit board 2041, and the first flexible circuit board 2041 is respectively connected to the positive bus 202, the negative bus 203, the battery module 40 and the printed circuit board 201.

[0062] Specifically, when the positive and negative electrodes of the battery 401 are located at the same end of the battery 401 , the first flexible circuit board 2041 and the positive and negative electrodes of the battery 401 are located on the same side, which facilitates the connection between the first flexible circuit board 2041 and the battery module 40 .

[0063] In another optional embodiment of the present application, the positive electrode and the negative electrode of the battery 401 are located at opposite ends of the battery 401; the flexible circuit board 204 includes a first flexible circuit board 2041 and a second flexible circuit board 2042, the first flexible circuit board 2041 is respectively connected to the positive bus 202, the negative bus 203, the battery module 40 and the printed circuit board 201, and the second flexible circuit board 2042 is respectively connected to the connecting bus 50, the battery module 40 and the printed circuit board 201, and the connection method is, for example, welding, but not limited thereto; wherein,

[0064] The first flexible circuit board 2041 , the positive bus bar 202 , and the negative bus bar 203 are located on the same side of the printed circuit board 201 , and the second flexible circuit board 2042 is located on a side of the printed circuit board 201 away from the first flexible circuit board 204 .

[0065] Specifically, the second flexible circuit board 2042 is, for example, a Flexible Printed Circuit (FPC), and is located on opposite sides of the printed circuit board 201 with the first flexible circuit board 204 . The second flexible circuit board 2042 is used to collect the voltage and temperature of the battery module 40 .

[0066] See also Figure 4A as well as Figure 4B In an optional embodiment of the present application, the battery pack 100 includes:

[0067] The shell 10 includes an upper cover 101 and a lower cover 102 arranged along the first direction Y. The upper cover 101 and the lower cover 102 form a receiving cavity. The battery module 40, the battery management component 20 and the plastic bracket 30 are arranged in the receiving cavity along the first direction Y.

[0068] Specifically, the printed circuit board 201 is close to the upper cover 101, the battery module 40 is close to the lower cover 102, the plastic bracket 30 is located between the printed circuit board 201 and the battery module 40, and the shell 10 is made of plastic, for example, but not limited thereto.

[0069] Furthermore, the upper cover 101 and the lower cover 102 may be mechanically connected, for example. In one embodiment, the upper cover 101 and the lower cover 102 are connected by bolts, but the present invention is not limited thereto and the specific connection shall be subject to actual application.

[0070] Furthermore, a first connection row 1011 and a second connection row 1012 are provided on a side of the upper cover 101 away from the battery module 40. The first connection row 1011 and the second connection row 1012 are, for example, attached to the upper cover 101. Parts of the first connection row 1011 and the second connection row 1012 also penetrate the upper cover 101 and are connected to the printed circuit board 201.

[0071] Specifically, the first connection bar 1011 is located above the positive bus 202 along the first direction Y, and the first connection bar 1011 forms a current loop with the positive bus 202 through the printed circuit board 201 and, for example, outputs current to an external device. The second connection bar 1012 is located above the negative bus 203 along the first direction Y, and the second connection bar 1012 forms a current loop with the negative bus 203 through the printed circuit board 201.

[0072] Specifically, the first connection bar 1011 and the second connection bar 1012 are made of metal materials, such as copper materials in this embodiment, but not limited thereto, and the specific application shall prevail. The first connection bar 1011 and the second connection bar 1012 can, for example, transmit the current, voltage or temperature of the battery module 40. In one embodiment, the first connection bar 1011 and the second connection bar 1012 are located on the upper cover 101, and partially penetrate the upper cover 101 and are welded to the printed circuit board 201 to form a current transmission path, which is transmitted from the positive bus 202 and the negative bus 203 to the first connection bar 1011 and the second connection bar 1012, and the current is transmitted or connected to the external device.

[0073] In an optional embodiment of the present application, the upper cover 101 is recessed with a plurality of mounting grooves 1016 on a side close to the battery module 40, and part of the first connecting row 1011 and the second connecting row 1012 are respectively arranged in the mounting grooves 1016 along the first direction Y, and another part of the first connecting row 1011 and the second connecting row 1012 pass through the mounting grooves 1016 to be connected to the printed circuit board 201.

[0074] Specifically, the number of the mounting grooves 1016 in this embodiment is, for example, 2, but is not limited thereto, and is determined according to actual applications. The mounting grooves 1016 are recessed along the first direction Y toward the side close to the battery module 40, so as to facilitate the assembly of the first connection row 1011 and the second connection row 1012, thereby reducing the risk of the first connection row 1011 and the second connection row 1012 being damaged during installation or transportation.

[0075] In an optional embodiment of the present application, the upper cover 101 further includes:

[0076] The first output stud 1013 and the second output stud 1014 are located in the mounting groove 1016 , the first output stud 1013 is connected to the side of the first connecting row 1011 away from the battery module 40 , and the second output stud 1014 is connected to the side of the second connecting row 1012 away from the battery module 40 .

[0077] In the related art, the connecting bar is also connected to the transfer copper bar, the transfer copper bar is connected to the output stud, and the transfer copper bar is bolted to the connecting bar. In the embodiment of the present application, the first connecting bar 1011 and the second connecting bar 1012 are directly connected to the first output stud 1013 and the second output stud 1014, eliminating the transfer copper bar. The first connecting bar 1011 and the second connecting bar 1012 are directly welded to the first output stud 1013 and the second output stud 1014, eliminating bolts, nuts and other materials, thereby achieving the effect of reducing costs and simplifying the assembly process.

[0078] Specifically, the first output stud 1013 and the second output stud 1014 play a role of locking connection and are locked and connected to an external car or other equipment.

[0079] In an optional embodiment of the present application, the installation groove 1016 has an installation height along the first direction Y, and after the portion of the first connecting row 1011 and the first output stud 1013 located in the installation groove 1016 is connected, the cross-section along the first direction Y has a first arrangement height, and after the portion of the second connecting row 1012 and the second output stud 1014 located in the installation groove 1016 is connected, the cross-section along the first direction Y has a second arrangement height, and the first arrangement height and the second arrangement height are less than or equal to the installation height.

[0080] Specifically, the mounting groove 1016 has a mounting height along the first direction Y toward the side of the battery module 40, and the two mounting grooves 1016 are configured to respectively accommodate the first connection row 1011 and the first output stud 1013 and the second connection row 1012 and the second output stud 1014. One end of the first output stud 1013 and / or the second output stud 1014 away from the battery module 40 is flush with the side of the upper cover 101 away from the battery module 40, or one end of the first output stud 1013 and / or the second output stud 1014 away from the battery module 40 is lower than the side of the upper cover 101 away from the battery module 40, thereby reducing the risk of the first output stud 1013 and / or the second output stud 1014 being knocked crooked or damaged during installation or transportation.

[0081] In an optional embodiment of the present application, the upper cover 101 further includes:

[0082] The communication connector 1015 includes a connection port 10151 and a connection pin 10152. The connection port 10151 is located on a side of the upper cover 101 away from the battery module 40. A portion of the connection pin 10152 is located inside the connection port 10151, for example to establish an electrical connection with an external communication connector, and the other portion passes through the upper cover 101 and is connected to the printed circuit board 201.

[0083] Specifically, the number of the connecting pins 10152 is, for example, 4, part of the connecting pins 10152 is connected to the external communication connector, and the other part passes through the connecting port 10151 and is welded to the printed circuit board 201. In the related art, there are usually two connectors, which are connected by an adapter harness, and the two ends of the adapter harness have adapters, which are respectively connected to the connectors. In the embodiment of the present application, the connecting port 10151 is welded on the upper cover 101, and the connecting pins 10152 are arranged in the connecting port 10151 and connected to the printed circuit board 201, eliminating the materials such as the adapter harness, the adapter, an adapter connector, and the bolts and nuts used to fix the adapter connector in the related art, thereby achieving the effect of reducing costs and simplifying the assembly process.

[0084] In an optional embodiment of the present application, the upper cover 101, the first connection row 1011, the second connection row 1012, the first output stud 1013, the second output stud 1014 and the communication connector 1015 are integrally injection molded, which has the effect of reducing costs and facilitating battery packaging assembly.

[0085] In an optional embodiment of the present application, the printed circuit board 201 is arranged relatively parallel to the upper cover 101 and the lower cover 102, the positive bus 202, the negative bus 203 and the flexible circuit board 204 extend from the edge of the printed circuit board 201 along the first direction Y into the accommodating cavity and are connected to the battery module 40, wherein the positive and negative electrodes of the plurality of batteries are located at one end or two opposite ends of the battery 401 along the third direction Z, saving space in the first direction Y in the accommodating cavity.

[0086] Specifically, the third direction Z is arranged perpendicular to the first direction Y and the second direction X, respectively. The plurality of batteries 401 are arranged along the second direction X, and the positive and negative electrodes of the plurality of batteries 401 are located at one end or two opposite ends of the battery 401 along the third direction Z. It can be understood that the plurality of batteries 401 are placed horizontally, thereby reducing the height of the entire battery pack. Based on the positive and negative electrodes of the plurality of batteries 401 arranged horizontally, the poles of the batteries 401 are on the side, and the flexible circuit board 204 extends from the side and is connected to the battery module 40, thereby reducing the difficulty of assembling the flexible circuit board 204.

[0087] See also Figure 5 In an optional embodiment of the present application, a plurality of placement grooves 1021 are recessed on one side of the lower cover 102 close to the battery module 40 , the plurality of placement grooves 1021 are arranged along the second direction X, and the plurality of batteries are arranged in the placement grooves 1021 along the second direction X.

[0088] Specifically, the lower cover 102 is provided with a plurality of outer shell plates, and the plurality of outer shell plates are arranged to form a cavity. A plurality of placement grooves 1021 are recessed on one side of the lower cover 102 close to the battery module 40, and the plurality of placement grooves 1021 are also located in the cavity. The battery 401 is located in the cavity and is arranged in the placement grooves 1021.

[0089] Furthermore, the lower cover 102 may be provided with a connector socket for connecting to an external device.

[0090] See also Figure 6 In an optional embodiment of the present application, the plastic bracket 30 further includes:

[0091] Multiple fixing parts 301 are arranged along the second direction X. The fixing parts 301 are located on the side of the plastic bracket 30 facing the battery module 40 . The multiple fixing parts 301 correspond to the multiple batteries 401 one by one. The fixing parts 301 are configured to surround and fix part of the batteries 401 .

[0092] Specifically, a plurality of fixing parts 301 are integrally formed with the plastic bracket 30. The number of the placement grooves 1021 and the fixing parts 301 corresponds to the number of the batteries 401. In one embodiment, the battery 401 is a cylindrical battery, and the placement groove 1021 is recessed toward a side away from the battery module 40, and is used to place the battery 401 to prevent the battery 401 from shaking in the battery pack 100, thereby affecting the battery performance and safety of the battery pack 100. The fixing part 301 has a receiving cavity on the side facing the battery module 40, and the battery 401 is partially located in the receiving cavity. The fixing part 301 has an arc-shaped side facing the battery module 40, and the space formed by the arc is, for example, the receiving cavity. The center of the arc is, for example, located on one side of the lower cover 102 to adapt to the battery 401. The receiving cavity is adapted to the size of the battery 401 and cooperates with the lower cover 102 to fix the battery 401. In one embodiment, a baffle is provided between two adjacent batteries 401 , for example, and the baffle is integrally formed with the plastic bracket 30 to prevent short circuits between the batteries.

[0093] In one embodiment, the plastic bracket 30 is mechanically connected to the printed circuit board 201. Specifically, the plastic bracket 30 is provided with a plurality of studs, and the printed circuit board 201 is provided with a plurality of nuts matching the studs, and the two are mechanically connected to achieve the fixation of the plastic bracket 30 and the printed circuit board 201. The present application does not limit the number of studs and nuts, which shall be subject to actual application.

[0094] In one embodiment, the plastic bracket 30 is mechanically connected to the upper cover 101 , for example. Specifically, the plastic bracket 30 is bolted to the upper cover 101 , but the invention is not limited thereto and is subject to actual application.

[0095] In an optional embodiment of the present application, the printed circuit board 201 is welded to the housing 10 .

[0096] Specifically, the printed circuit board 201 is welded to parts of the first connection row 1011 and the second connection row 1012 of the housing 10 .

[0097] The battery pack provided in the present application includes at least the following working process or principle: the battery pack 100 includes a battery module 40 and a battery management component 20, and the battery management component 20 is connected to the battery module 40. The battery management component 20 includes: a printed circuit board 201, a positive bus 202, a negative bus 203 and a flexible circuit board 204. Among them, one end of the positive bus 202 and the negative bus 203 is connected to the battery module 40, and the other end is connected to the printed circuit board 201, and the flexible circuit board 204 is respectively connected to the positive bus 202, the negative bus 203, the battery module 40 and the printed circuit board 201. The materials such as the adapter connector are omitted, which greatly reduces the production cost and assembly cost of the battery pack, and achieves the effect of reducing costs and simplifying assembly processes.

[0098] In summary, although the present application has been disclosed as above with preferred embodiments, the above preferred embodiments are not intended to limit the present application. Ordinary technicians in this field can make various changes and modifications without departing from the spirit and scope of the present application. Therefore, the scope of protection of the present application shall be based on the scope defined in the claims.

Claims

1. A battery pack, characterized in that: include: Battery module; and A battery management component connected to the battery module, the battery management component comprising: a printed circuit board, a positive bus bar, a negative bus bar and a flexible circuit board; Among them, one end of the positive bus and the negative bus is connected to the battery module, and the other end is connected to the printed circuit board, and the flexible circuit board is respectively connected to the positive bus, the negative bus, the battery module and the printed circuit board.

2. The battery pack according to claim 1, characterized in that: The battery pack comprises: A plastic bracket, located between the printed circuit board and the battery module along a first direction; The battery module includes a plurality of batteries arranged along a second direction intersecting the first direction, the batteries include a positive electrode and a negative electrode, the positive electrode bus is connected to the positive electrode of the first or last battery arranged along the second direction, and the negative electrode bus is connected to the negative electrode of the first or last battery arranged along the second direction.

3. The battery pack according to claim 2, characterized in that: The plastic support is also provided with a plurality of connecting busbars. In addition to the positive electrode busbar and the negative electrode busbar connecting the positive electrode and the negative electrode of the battery, the connecting busbar connects the positive electrode and the negative electrode of two adjacent batteries.

4. The battery pack according to any one of claims 1 to 3, characterized in that: The flexible circuit board includes a first flexible circuit board, and the positive electrode, the negative electrode and the first flexible circuit board of the battery are located on the same side; the first flexible circuit board is respectively connected to the positive bus bar, the negative bus bar, the battery module and the printed circuit board.

5. The battery pack according to any one of claims 1 to 3, characterized in that: The positive electrode and the negative electrode of the battery are located at opposite ends of the battery; the flexible circuit board includes a first flexible circuit board and a second flexible circuit board, the first flexible circuit board is respectively connected to the positive bus bar, the negative bus bar, the battery module and the printed circuit board, and the second flexible circuit board is respectively connected to the bus bar, the battery module and the printed circuit board; wherein, The first flexible circuit board, the positive bus bar and the negative bus bar are located on the same side of the printed circuit board, and the second flexible circuit board is located on a side of the printed circuit board away from the first flexible circuit board.

6. The battery pack according to claim 3, characterized in that: The battery pack comprises: A housing, comprising an upper cover and a lower cover arranged along the first direction, wherein the upper cover and the lower cover form a receiving cavity, and the battery module, the battery management assembly and the plastic bracket are arranged in the receiving cavity along the first direction; A first connection row and a second connection row are provided on a side of the upper cover away from the battery module, and parts of the first connection row and the second connection row penetrate the upper cover and are connected to the printed circuit board.

7. The battery pack according to claim 6, characterized in that: The upper cover is recessed with a plurality of mounting grooves along the first direction toward a side close to the battery module, and some of the first connecting rows and the second connecting rows are respectively arranged in the mounting grooves along the first direction, and another part of the first connecting rows and the second connecting rows pass through the mounting grooves to be connected to the printed circuit board.

8. The battery pack according to claim 7, characterized in that: The upper cover also includes: The first output stud and the second output stud are located in the installation groove, the first output stud is connected to the side of the first connection row away from the battery module, and the second output stud is connected to the side of the second connection row away from the battery module.

9. The battery pack according to claim 8, characterized in that: The mounting groove has a mounting height along the first direction, a cross section along the first direction after the portion of the first connecting row located in the mounting groove and the first output stud are connected has a first arrangement height, a cross section along the first direction after the portion of the second connecting row located in the mounting groove and the second output stud are connected has a second arrangement height, and the first arrangement height and the second arrangement height are both less than or equal to the mounting height.

10. The battery pack according to claim 8, characterized in that: The upper cover also includes: The communication connector comprises a connection port and a connection pin, wherein the connection port is located on a side of the upper cover away from the battery module, the connection pin is partially located in the connection port, and the other part passes through the upper cover and is connected to the printed circuit board.

11. The battery pack according to claim 10, characterized in that: The upper cover, the first connection row, the second connection row, the first output stud, the second output stud and the communication connector are integrally injection molded.

12. The battery pack according to claim 6, characterized in that: The printed circuit board is arranged relatively parallel to the upper cover and the lower cover, the positive bus bar, the negative bus bar and the flexible circuit board extend from the edge of the printed circuit board along the first direction into the accommodating cavity and are connected to the battery module, wherein the positive and negative electrodes of the plurality of batteries are located at one end or two opposite ends of the battery along a third direction, and the third direction intersects with the first direction and the second direction respectively.

13. The battery pack according to claim 6, wherein: A plurality of placement grooves are provided on one side of the lower cover close to the battery module. The plurality of placement grooves are arranged along the second direction, and a plurality of batteries are arranged in the placement grooves along the second direction.

14. The battery pack according to claim 13, wherein: The plastic bracket also includes: A plurality of fixing parts are arranged along the second direction, the fixing parts are located on the side of the plastic bracket facing the battery module, the plurality of fixing parts correspond to the plurality of batteries one by one, and the fixing parts are configured to surround and fix part of the batteries.

15. The battery pack according to claim 10, characterized in that: The printed circuit board is welded to the housing.

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