CN217239579U

CN217239579U - Power battery pack and power device

Info

Publication number: CN217239579U
Application number: CN202220959649.6U
Authority: CN
Inventors: 刘学文
Original assignee: Svolt Energy Technology Co Ltd
Current assignee: Svolt Energy Technology Co Ltd
Priority date: 2022-04-22
Filing date: 2022-04-22
Publication date: 2022-08-19
Anticipated expiration: 2032-04-22

Abstract

The application discloses power battery package and power device. The power battery package that this application embodiment provided includes battery module, circuit board and cooling plate. The circuit board is provided with a first connecting piece, the first connecting piece is electrically connected with the battery module, and an avoiding structure arranged at an interval with the first connecting piece is formed on the circuit board; the cooling plate is connected with the battery module and the circuit board, and a water pipe connector is arranged on the cooling plate and accommodated in the avoiding structure. Therefore, the first connecting piece arranged on the circuit board is connected with the battery module, the path of the wiring harness is reduced, the wiring quantity is reduced, meanwhile, the first connecting piece can be prevented from interfering with the water pipe connector, and the water pipe is arranged on the water pipe connector more easily and firmly.

Description

Power battery pack and power device

Technical Field

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

Background

In the correlation technique, the battery module adopts two-layer electric core dislocation to stack, presss from both sides cold in the middle of the two-layer electric core direction of height, and the design of the pipe connecting piece of cold plate is at Y to the intermediate position, and water pipe and pencil have adopted the scheme of layering arrangement in the direction of height, and the pencil is under, and the water pipe is last. Because module collection return circuit progressively increases forward in proper order, leads to well passageway pencil from the back to become thick diameter grow gradually forward, anterior water pipe card connecting piece position and pencil take place easily to interfere, lead to water pipe installation joint difficulty or joint not firm.

SUMMERY OF THE UTILITY MODEL

The embodiment of the application provides a power battery pack and a power device.

The power battery package that this application embodiment provided includes battery module, circuit board and cooling plate. The circuit board is provided with a first connecting piece, the first connecting piece is electrically connected with the battery module, and an avoiding structure arranged at an interval with the first connecting piece is formed on the circuit board; the cooling plate is connected with the battery module and the circuit board, and a water pipe connector is arranged on the cooling plate and accommodated in the avoiding structure.

Therefore, the first connecting piece arranged on the circuit board is connected with the battery module, so that the path of a wiring harness is reduced, the wiring quantity is reduced, meanwhile, the first connecting piece can be prevented from interfering with the water pipe connector, and the water pipe connector is easier and firmer to install on the water pipe connector.

In some embodiments, the battery modules include two groups, the two groups of battery modules are arranged on the cooling plate at intervals along the width direction of the circuit board, and the circuit board is arranged between the two groups of battery modules.

In some embodiments, the cooling plate is formed with a center channel, two sets of the battery modules are disposed on two sides of the center channel along a width direction of the circuit board, and the width of the circuit board is smaller than or equal to the width of the center channel.

In some embodiments, the circuit board includes a first portion and a second portion connected to the first portion, the first portion is provided with the first connecting member, the first portion is formed with the avoiding structure, the first portion is accommodated in the middle channel, and the second portion is provided with a second connecting member, which is used for electrically connecting to a battery management system of the power battery pack.

In some embodiments, a third connector is disposed on the second portion for electrically connecting with a battery distribution box of the power battery pack.

In some embodiments, a bracket set is disposed on the circuit board, the bracket set includes two brackets disposed at intervals along a length direction of the circuit board, and the brackets are configured to be connected to the first connector.

In some embodiments, the brackets include first end portions and second end portions connected to the first end portions, wherein the first end portion of one of the brackets extends from the circuit board in a direction away from the cooling board, wherein the second end portion of one of the brackets extends from the first end portion in a direction away from the other bracket, and wherein the second end portions are connected to the first connecting members.

In some embodiments, the battery modules include at least two groups, the circuit board is provided with at least two support groups, the at least two support groups are symmetrically arranged along the width direction of the circuit board, and the support groups correspond to the battery modules one to one.

In some embodiments, the number of the avoiding structures is multiple, the avoiding structures are alternately arranged on two sides of the width direction of the circuit board at intervals along the length direction of the circuit board, and the water pipe connectors correspond to the avoiding structures one to one.

The power device provided by the embodiment of the application comprises the power battery pack of any one of the embodiments.

Additional aspects and advantages of the present application will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the present application.

Drawings

The above and/or additional aspects and advantages of the present application will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:

fig. 1 is a partial structural schematic diagram of a power battery pack according to an embodiment of the present application;

fig. 2 is a schematic structural diagram of a circuit board according to an embodiment of the present application.

Description of the main element symbols:

the power battery pack 100, the battery module 10, the circuit board 20, the first connector 201, the avoiding structure 202, the first part 21, the second part 22, the second connector 221, the third connector 222, the bracket set 23, the bracket 231, the first end 2311, the second end 2312, the cooling plate 30, the water pipe 31, the water pipe connector 301, the middle channel 302, the battery management system 40 and the battery distribution box 50.

Detailed Description

Reference will now be made in detail to embodiments of the present application, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the accompanying drawings are exemplary only for explaining the present application and are not to be construed as limiting the present application.

In the description of the present application, it is to be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the present application and for simplicity in description, and are not intended to indicate or imply that the referenced devices or elements must have a particular orientation, be constructed in a particular orientation, and be operated in a particular manner, and are not to be construed as limiting the present application. Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or to implicitly indicate the number of technical features indicated. Thus, features defined as "first", "second", may explicitly or implicitly include one or more of the described features. In the description of the present application, "a plurality" means two or more unless specifically limited otherwise.

In the description of the present application, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; may be mechanically, electrically or may be in communication with each other; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art as appropriate.

In this application, unless expressly stated or limited otherwise, the recitation of a first feature "on" or "under" a second feature may include the recitation of the first and second features being in direct contact, and may also include the recitation of the first and second features not being in direct contact, but being in contact with another feature between them. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.

The following disclosure provides many different embodiments or examples for implementing different features of the application. In order to simplify the disclosure of the present application, specific example components and arrangements are described below. Of course, they are merely examples and are not intended to limit the present application. Moreover, the present application may repeat reference numerals and/or letters in the various examples, such repetition is for the purpose of simplicity and clarity and does not in itself dictate a relationship between the various embodiments and/or configurations discussed. In addition, examples of various specific processes and materials are provided herein, but one of ordinary skill in the art may recognize applications of other processes and/or use of other materials.

Referring to fig. 1 and 2, a power battery pack 100 according to an embodiment of the present disclosure includes a battery module 10, a circuit board 20, and a cooling plate 30. The circuit board 20 is provided with a first connecting member 201, the first connecting member 201 is electrically connected with the battery module 10, and an avoiding structure 202 arranged at an interval with the first connecting member 201 is formed on the circuit board 20. The cooling plate 30 is connected with the battery module 10 and the circuit board 20, and the water pipe connector 301 is arranged on the cooling plate 30, and the water pipe connector 301 is accommodated in the avoiding structure 202.

In this way, the first connecting member 201 mounted on the circuit board 20 is connected to the battery module 10, so that the path of the wiring harness is reduced, the number of wires is reduced, and meanwhile, the first connecting member 201 is prevented from interfering with the water pipe connector 301, so that the water pipe 31 is easier and more secure to mount on the water pipe connector 301.

Specifically, the battery module 10 may be a lead-acid battery, a nickel-metal hydride battery, a lithium battery, or the like. The lithium battery has the advantages of light weight, multiple charge-discharge cycle times, strong high-temperature applicability, environmental friendliness and the like, and preferably, the battery module 10 can adopt a lithium battery. The number of the battery modules 10 may be plural, and a plurality of the battery modules 10 may be arrayed on the cooling plate 30. The shape of the battery module 10 is not limited herein, and the battery module 10 may be rectangular parallelepiped or cylindrical.

It is understood that, during the operation of the battery module 10, the heat may be generated and heated, and the long-term accumulation of heat on the battery module 10 may reduce the charging efficiency of the battery module 10, shorten the service life of the battery module 10, and reduce the battery capacity of the battery module 10. The battery module 10 is mounted on the cooling plate 30, the cooling plate 30 is used for dissipating heat of the battery module 10, cooling liquid is introduced into the cooling plate 30, and heat generated by the battery module 10 is taken away through the flowing of the cooling liquid to dissipate heat.

The cooling plate 30 may be made of metal, and in one embodiment, the cooling plate 30 is a rectangular plate made of aluminum, wherein the cooling plate 30 is made of aluminum, so that the weight of the cooling plate 30 can be reduced to achieve the light weight of the power battery pack 100. In some embodiments, the cooling plate 30 may also be made of a non-metallic material with good thermal conductivity, and the material of the cooling plate 30 is not limited herein.

More specifically, the cooling plate 30 may be circular, rectangular, or may have other irregular shapes. It is understood that the area of one surface of the cooling plate 30, which is adjacent to the battery module 10, is greater than or equal to the bottom area of the battery module 10, whereby effective heat dissipation from the battery module 10 by the cooling plate 30 can be achieved. The battery module 10 may be mounted on the cooling plate 30 by means of bonding, bolting, welding, or clamping, without limitation.

The circuit board 20 has a circuit etched thereon, and the circuit is electrically connected to the first connector 201. When the first connecting member 201 is connected to the battery module 10, the first connecting member 201 can be used to collect information of the battery module 10, such as voltage, temperature, etc. In addition, the circuit board 20 is mounted on the cooling plate 30, and the cooling plate 30 can also dissipate heat from the circuit board 20. The circuit board 20 may be mounted on the cooling plate 30 by means of bonding, soldering, or clamping, without limitation. The arrangement of the circuit board 20 reduces the arrangement of the wiring harness, so that the power battery pack 100 is simple and attractive. In one embodiment, the circuit board 20 can be a flexible circuit board 20, and the flexible circuit board 20 has a small thickness, so that the height of the power battery pack 100 is reduced, and the power battery pack is convenient to disassemble.

In some embodiments, a plurality of water pipe connectors 301 are spaced apart from each other on the cooling plate 30, and the water pipe connectors 301 are used for connecting with the water pipes 31 to cool the liquid. The cooling liquid is injected into the cooling plate 30 through the water pipe connector 301, and can be discharged through the other water pipe connector 301, so that the cooling liquid can circularly flow. The water pipe joint 301 accommodates the avoiding structure 202 on the circuit board 20, and along the length direction Y of the circuit board 20, the avoiding structure 202 and the connecting piece are arranged at intervals, so that the connecting piece can be prevented from interfering with the water pipe joint 301, the water pipe 31 is easier and firmer to be installed on the water pipe joint 301, and the first connecting piece 201 can be easily disassembled and installed. In one embodiment, the bypass structure 202 may be a through hole that extends through the circuit board 20.

Referring to fig. 1, in some embodiments, the battery modules 10 include two sets of battery modules 10, the two sets of battery modules 10 are disposed on the cooling plate 30 at intervals along the width direction X of the circuit board 20, and the circuit board 20 is disposed between the two sets of battery modules 10. In this way, the circuit board 20 is disposed between the two sets of battery modules 10, so as to ensure that the power battery pack 100 is deformed during side collision without causing internal short circuit, thereby ensuring safety.

Specifically, the number of each group of battery modules 10 can be a plurality of, and each group of battery modules 10 is arranged in an array, and through the power battery pack 100 that a plurality of battery modules 10 are assembled and formed, when a certain battery module 10 of power battery pack 100 breaks down, this battery module 10 can be directly replaced in order to reduce cost of maintenance. The number of the battery modules 10 in each group of the battery modules 10 may be 2, 3, 4 or 5, and the plurality of battery modules 10 are disposed on the cooling plate 30 along the circuit board 20, so that the number of the battery modules 10 can be selected according to the actual power requirement, and the like, without limitation.

In one embodiment, the battery modules 10 include two groups, the number of the battery modules 10 in each group is four, and four battery modules 10 are arranged on the cooling plate 30 in an array along the length direction Y of the circuit board 20, so that the whole power battery pack 100 is substantially in a rectangular parallelepiped shape.

In some embodiments, the battery modules 10 may include two layers, the two layers of battery modules 10 are spaced apart from each other in the height direction of the power battery pack 100, one surface of the cooling plate 30 is connected to one of the layers of battery modules 10, the other surface of the cooling plate 30 is connected to the other layer of battery modules 10, and the cooling plate 30 can dissipate heat of the two layers of battery modules 10 simultaneously.

Referring to fig. 1, in some embodiments, the cooling plate 30 is formed with a central channel 302, two sets of battery modules 10 are disposed on two sides of the central channel 302 along the width direction X of the circuit board 20, and the width of the circuit board 20 is smaller than or equal to the width of the central channel 302.

Thus, the circuit board 20 can be mounted between the two sets of battery modules 10 without affecting the mounting of the battery modules 10 on the cooling plate 30, so that the power battery pack 100 is compact. In some embodiments, the circuit board 20 can be secured to the cooling plate 30 by adhesive, thus avoiding opening the through-channel 302.

Referring to fig. 1 and 2, in some embodiments, the circuit board 20 includes a first portion 21 and a second portion 22 connected to the first portion 21, the first portion 21 is provided with a first connecting member 201, the first portion 21 is formed with an avoiding structure 202, the first portion 21 is accommodated in the middle channel 302, the second portion 22 is provided with a second connecting member 221, and the second connecting member 221 is used for connecting with the battery management system 40 of the power battery pack 100.

In this way, the first portion 21 of the circuit board 20 is used for connecting with the battery modules 10, the second portion 22 is used for connecting with the battery management system 40 of the power battery pack 100, and the battery management system 40 is mainly used for managing and maintaining each battery module 10, preventing overcharge and overdischarge of the battery module 10, prolonging the service life of the battery module 10, and monitoring the state of the battery module 10.

Specifically, along the length of the circuit board 20 in the opposite direction, the first portion 21 may be disposed through the middle channel 302 of the cooling plate 30, the second portion 22 may be disposed perpendicular to the first portion 21, the second portion 22 is located outside the cooling plate 30, and a side of the second portion 22 away from the second connecting member 221 may abut against the battery module 10, so that the power battery pack 100 has a compact structure. In one embodiment, the first portion 21 and the second portion 22 of the circuit board 20 are made of aluminum, which can reduce the cost.

Referring to fig. 1 and 2, in some embodiments, a third connector 222 is disposed on the second portion 22, and the third connector 222 is configured to be electrically connected to the battery distribution box 50 of the power battery pack 100. In this way, after the battery distribution box 50 is connected to the circuit board 20 and the battery module 10 through the third connector 222, the battery distribution box 50 can ensure the power transmission of the power battery pack 100. Specifically, the battery distribution box 50 is a bridge for power supply and signal transmission between the inside of the power battery pack 100 and external high-voltage equipment, wherein the battery distribution box 50 can also receive instructions from the battery management system 40 and timely implement the power supply and power off functions of the power battery pack 100.

In some embodiments, a plurality of connectors are disposed on the second portion 22, and some of the connectors are used to electrically connect with the high-voltage interlock socket, so as to implement high-voltage safety protection for the power battery pack 100. Part of the connector may be used for electrical connection with a low voltage connector.

The first connecting member 201, the second connecting member 221, the third connecting member 222 and the rest of the connecting members may be connectors pressed by a piercing method.

Referring to fig. 2, in some embodiments, a bracket set 23 is disposed on the circuit board 20, the bracket set 23 includes two brackets 231 spaced apart along a length direction Y of the circuit board 20, and the brackets 231 are used for connecting with the first connectors 201.

Thus, the circuit board 20 can be connected to the battery modules 10 through the bracket 231 and the first connecting members 201, and the information of one battery module 10 can be collected by using two first connecting members 201.

Specifically, the holder 231 may be made of a metal material to perform a conductive function, and in one embodiment, the holder 231 may be made of a nickel-plated copper sheet. The two brackets 231 are electrically connected to the two first connectors 201, respectively, in some embodiments, the two first connectors 201 are connected to the same battery module 10, one first connector 201 can be used for collecting voltage data of the battery module 10, and the other first connector 201 can be used for collecting temperature data of the battery module 10.

In some embodiments, a safety circuit may be etched on the bracket 231, and when a short-circuit fault occurs, the safety circuit can rapidly cut off the electrical connection between the battery module 10 and the circuit board 20, so as to protect the circuit board 20 and the battery module 10, thereby effectively ensuring the safety of users. Meanwhile, the safety circuit is etched on the bracket 231, and the safety circuit can not be etched in the circuit board 20 any more, so that the circuit board 20 can select an FFC scheme with lower cost, and the cost can be reduced.

Referring to fig. 2, in some embodiments, the brackets 231 include first ends 2311 and second ends 2312 connected to the first ends 2311, wherein the first end 2311 of one bracket 231 extends from the circuit board 20 in a direction away from the cooling plate 30, the second end 2312 of one bracket 231 extends from the first end 2311 in a direction away from the other bracket 231, and the second end 2312 is connected to the first connector 201.

Thus, the bracket 231 can absorb the position tolerance between the circuit board 20 and the battery module 10, and facilitate the insertion and extraction of the first connector 201. Specifically, the first end 2311 of the bracket 231 extends from the circuit board 20 in a direction away from the cooling plate 30, so that the second end 2312 is spaced apart from the circuit board 20, thereby facilitating connection of the first connector 201 on the second end 2312 with the battery module 10.

Referring to fig. 1 and 2, in some embodiments, the battery modules 10 include at least two sets, at least two support sets 23 are disposed on the circuit board 20, the at least two support sets 23 are symmetrically disposed along the width direction X of the circuit board 20, and the support sets 23 correspond to the battery modules 10 one by one.

Thus, the first connecting members 201 on the two bracket sets 23 are respectively connected with the two sets of battery modules 10, so as to avoid confusion, for example, the first connecting members 201 on both sides of the width direction X of the circuit board 20 are inserted in a wrong way, and meanwhile, the connection between the first connecting members 201 and the corresponding battery modules 10 is more convenient.

Referring to fig. 1 and 2, in some embodiments, the number of the avoiding structures 202 is multiple, and the avoiding structures 202 are alternately arranged on two sides of the width direction X of the circuit board 20 at intervals along the length direction Y of the circuit board 20, and the water pipe connectors 301 correspond to the avoiding structures 202 one by one.

In this way, the plurality of water tubes 31 can increase the flow rate of the cooling liquid in the cooling plate 30, thereby increasing the heat dissipation efficiency of the battery module 10. Each water pipe joint 301 on the cooling plate 30 is accommodated in the avoiding structure 202, so that the interference between the water pipe joint 301 and the first connecting piece 201 can be avoided, the installation of the water pipe 31 and the water pipe joint 301 is not easily influenced, and the installation and the disassembly between the first connecting piece 201 and the battery module 10 are also convenient.

The power device provided by the embodiment of the present application includes the power battery pack 100 according to any one of the embodiments described above. The power device can be an electric automobile, a hybrid electric automobile, a battery car, a robot, an unmanned aerial vehicle and the like. The power battery pack 100 may provide power for the power plant.

In the description of the present specification, reference to the description of "one embodiment", "certain embodiments", "illustrative embodiments", "examples", "specific examples", or "some examples" or the like means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present application. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

While embodiments of the present application have been shown and described, it will be understood by those of ordinary skill in the art that: numerous changes, modifications, substitutions and alterations can be made to the embodiments without departing from the principles and spirit of the application, the scope of which is defined by the claims and their equivalents.

Claims

1. A power battery pack, comprising:

a battery module;

the circuit board is provided with a first connecting piece, the first connecting piece is electrically connected with the battery module, and an avoiding structure arranged at an interval with the first connecting piece is formed on the circuit board;

the cooling plate is connected with the battery module and the circuit board, and a water pipe connector is arranged on the cooling plate and accommodated in the avoiding structure.

2. The power battery pack according to claim 1, wherein the battery modules comprise two groups, the two groups of battery modules are arranged on the cooling plate at intervals along the width direction of the circuit board, and the circuit board is arranged between the two groups of battery modules.

3. The power battery pack according to claim 2, wherein a middle channel is formed in the cooling plate, two groups of battery modules are arranged on two sides of the middle channel along the width direction of the circuit board, and the width of the circuit board is smaller than or equal to the width of the middle channel.

4. The power battery pack as recited in claim 3, wherein the circuit board comprises a first portion and a second portion connected to the first portion, the first portion is provided with the first connecting member, the first portion is formed with the avoiding structure, the first portion is received in the central channel, and the second portion is provided with a second connecting member for electrically connecting to a battery management system of the power battery pack.

5. The power battery pack of claim 4, wherein the second portion is provided with a third connector for electrical connection with a battery distribution box of the power battery pack.

6. The power battery pack as claimed in claim 1, wherein the circuit board is provided with a bracket set, the bracket set comprises two brackets spaced along the length direction of the circuit board, and the brackets are used for connecting with the first connecting piece.

7. The power pack as recited in claim 6, wherein the brackets include first ends and second ends connected to the first ends, wherein the first end of one of the brackets extends from the circuit board in a direction away from the cooling plate, wherein the second end of one of the brackets extends from the first end in a direction away from the other bracket, and wherein the second ends are connected to the first connectors.

8. The power battery pack according to claim 6, wherein the battery modules comprise at least two groups, the circuit board is provided with at least two support groups, the at least two support groups are symmetrically arranged along the width direction of the circuit board, and the support groups correspond to the battery modules one to one.

9. The power battery pack according to claim 1, wherein the number of the avoiding structures is multiple, the avoiding structures are alternately arranged on two sides of the width direction of the circuit board at intervals along the length direction of the circuit board, and the water pipe connectors are in one-to-one correspondence with the avoiding structures.

10. A power plant, comprising:

the power cell pack of any one of claims 1-9.