Patent Application
20250183495
This application claims priority under 35 U.S.C. § 119(a) to Chinese Patent Application No. 202311649170.8, filed Dec. 1, 2023, the entire disclosure of which is incorporated herein by reference.
The present disclosure relates to the field of battery technologies, and in particular to a battery pack, and an electricity-consumption device.
In the related art, voltage and temperature parameters of the battery pack are usually transmitted to the Battery Management System (BMS) through a wiring harness. Specifically, one end of the wiring harness is connected to an interface end of the BMS, and the other end collects the voltage and temperature of a battery module. However, under the trend of pursuing high energy density of the battery pack, the number of battery modules inside the battery pack is constantly increasing, which leads to the space volume of the battery pack also constantly increasing. A problem with the wiring harness collection method is that not only a lager diameter of wiring harness of some battery modules makes the wiring harness occupy too much internal space of the battery pack, resulting in low utilization rate of the internal space of the battery pack and increasing the manufacturing cost of the battery pack, but also the complex wiring with numerous connections leads to poor electrical safety.
The present disclosure discloses a battery pack, including: a battery management system; a plurality of battery modules, each battery module including a plurality of battery cells sequentially arranged along a length direction of the battery module; a plurality of circuit boards, one circuit board being arranged at the top of each battery module, the circuit board connecting each battery cell in the battery module to collect operating data from each battery cell; a plurality of connector assemblies, each connector assembly including a first interface and a first plug connected to each other, one of two adjacent circuit boards being connected to the first interface, and the other one being connected to the first plug; the two adjacent circuit boards being connected to each other through the connector assembly, so that the plurality of circuit boards are connected in series to form a circuit board string; the circuit board string being connected to the battery management system to transmit the operating data of each battery cell in each battery module to the battery management system.
In a second aspect, the present disclosure discloses an electricity-consumption device, including a battery pack.
In order to illustrate the technical solutions in the embodiments of the present disclosure more clearly, the drawings used in the embodiments will be briefly introduced below. It is apparent that the drawings in the following descriptions are merely some embodiments of the present disclosure. For those skilled in the art, other drawings may be obtained based on these drawings without exerting creative efforts.
Illustration of reference signs: 1000—battery pack, 10—battery management system, 20—battery module, 20a—first battery module, 20b—second battery module, 21—end plate, 211—first circuit board fixing seat, 212—second circuit board fixing seat, 22—battery cell, 23—connector, 24—binding tape, 25—positioning pin, 30—circuit board, 301—collection component, 302—reinforcement plate, 30a—first circuit board, 31—first rigid connecting portion, 311—adapter, 3111—second interface, 3112—second plug, 32—second rigid connecting portion, 33—flexible connecting portion, 30b—second circuit board, 35—flexible bending portion, 36—clearance hole, 40—connector assembly, 41—first interface, 42—first plug, 50—wire, 60—circuit board support, 61—support portion, 62—wing plate portion, 621—positioning strip, 63—positioning portion, 70—housing, 2000—electricity-consumption device.
The following clearly and completely describes the technical solutions in the embodiments of the present disclosure with reference to the accompanying drawings in the embodiments of the present disclosure. Apparently, the described embodiments are some rather than all of the embodiments of the present disclosure. All other embodiments obtained by persons of ordinary skill in the art based on the embodiments of the present disclosure without creative efforts fall within the protection scope of the present disclosure.
In the present disclosure, the terms such as “upper”, “lower”, “left”, “right”, “front”, “rear”, “top”, “bottom”, “inner”, “outer”, “vertical”, “horizontal”, “lateral”, and “longitudinal” indicate orientation or position relationship based on the orientation or position relationship illustrated in the drawings. These terms are primarily intended to better describe the present disclosure and its embodiments and are not used to define the indicated device, element or component must have a particular orientation, or be constructed and operated in a particular orientation.
Moreover, the above partial terms may be used to indicate other meanings in addition to the orientation or position relationship, for example, the term “upper” may also be used to indicate a certain dependency or connection relationship in some cases. To those of ordinary sill in the art, the specific meaning of the above terms in the present disclosure can be understood in the specific circumstances.
In additional, the terms “installation”, “set up”, “dispose with”, “connection”, “connect to” should be understood in a broad sense. For example, they can be fixed connection, detachable connection, or integrated connection; they can be mechanical connection, or electrical connection; they can be directly connection, or they can be indirectly connection through an intermediate media, or they can be internal connection between two devices, two elements or two components. For those of ordinary skill in the art, the specific meaning of the above terms in the present disclosure can be understood according to the specific circumstances.
In additional, the terms such as “the second”, “the first” are primarily used to differentiate different devices, elements or components (specific types and constructions may be the same of different), and are not used to indicate or imply the relative importance and quantity of the indicated device, element or component. Unless otherwise stated, “plurality” means two or more.
In the related art, voltage and temperature parameters of a battery pack are usually transmitted to the Battery Management System (BMS) through a wiring harness. However, a voltage and temperature collection terminal of a battery module is often positioned far away from the interface terminal of the BMS, which requires the wiring harness to have sufficient length, which leads to the wiring harness occupying too much internal space of the battery pack, resulting in a low utilization rate of the internal space of the battery space and a large number of wiring harness arrangements, complicated wiring harness and poor electrical safety. Therefore, the technical solution of the present disclosure is described below with reference to
Referring to
As illustrated in
The circuit boards 30 correspond one-to-one with the battery modules 20. One circuit board 30 is arranged at the top of each battery module 20. The circuit board 30 is connected to each battery cell 22 in the battery module 20 to collect operating data from each battery cell 22. Specifically, the plurality of connectors 23 as illustrated in
As illustrated in
The circuit board string is connected to the battery management system 10 to transmit the operating data such as voltage data, current data and temperature data of each battery cell 22 in the battery module 20 to the battery management system 10. Compared with the collection method through the wiring harness, the collection method through the circuit board 30 is more space-saving, cost-effective and more reliable connection. Occupying smaller space is conducive to improving the space utilization rate inside the battery. At the same time, compared with the complex wiring harness layout, it can improve the safety of the electricity.
Alternatively,, as illustrated in
Alternatively, as illustrated in
Alternatively, as illustrated in
Alternatively, as illustrated in
Alternatively, as illustrated in
More specifically, the battery module 20 adjacent to the battery management system 10 is a first battery module 20a. The circuit board 30 provided on the first battery module 20a is a first circuit board 30a. The middle part of the first circuit board 30a is a flexible connecting portion 33. The two ends of the first circuit board 30a are respectively the first rigid connecting portion 31 and the second rigid connecting portion 32 connected to the flexible connecting portion 33. The flexible connecting portion 33 is connected to each battery cell 22 of the first battery module 20a, so that the first circuit board 30a can ensure flexibility while ensuring rigidity at both ends, thereby ensuring the connection stability with the adjacent circuit board 30 and the wire 50.
One of the end plates 21 of the first battery module 20a is provided with a first circuit board fixing seat 211 to connect to the first rigid connecting portion 31, and the other is provided with a second circuit board fixing seat 212 to connect to the second rigid connecting portion 32, thereby ensuring connection stability.
Alternatively, one circuit board 30 has a flexible bending portion 35 at one end of the one circuit board 30 facing adjacent another circuit board 30. The flexible bending portion 35 is suspended above installation reserved mounting gap between the two adjacent battery modules 20, and the flexible bending portion 35 connects to the another circuit board 30 through the connector assembly 40. The flexible bending portion 35 makes the circuit board 30 has a flexible deformation part. A position or shape of the flexible bending portion 35 can be adjusted to accommodate changes in position or distance between the two adjacent battery modules 20, thus facilitating the connection of the two adjacent battery modules 20. At the same time, the circuit board 30 can reserve a redundant part through the flexible bending 35 to prevent the connection failure between the two interconnected circuit boards 30 caused by mutual pulling due to abnormal shaking of the battery pack and other external factors.
Alternatively, as illustrated in
More specifically, the battery module 20 includes a first battery module 20a and a second battery module 20b sequentially arranged along the length direction of the battery pack. The circuit board 30 includes the first circuit board 30a arranged at the top of the first battery module 20a and the second circuit board 30b arranged at the top of the second battery module 20b. The second circuit board 30b includes a flexible connecting portion 33 and a flexible bending portion 35 connected to each other. The flexible bending portion 33 of the second circuit board 30b is connected to each battery cell 22 of the second battery module 20b, and the second circuit board 30b is connected to the first circuit board 30a through the flexible bending portion 35 and the connector assembly 40.
Furthermore, as mentioned above, the battery pack in this disclosure can be formed into a module string by only two battery modules 20, that is, the aforementioned first battery module 20a and the second battery module 20b are sequentially arranged to form the module string. The battery pack can have a plurality of module strings arranged side by side to ensure the capacity of the battery pack. The top of the first battery module 20a is provided with the first circuit board 30a, and the first circuit board 30a is rigidly reinforced at both ends to ensure good connection stability with the first battery module 20a, the wire 50 and the second circuit board 30b. The top of the second battery module 20b is provided with the second circuit board 30b. The second circuit board 30b is flexible and adjustable through the flexible bending portion 35 to ensure the connection effectiveness between the second circuit board 30b and the first circuit board 30a, and to prevent the connection failure between the second circuit board 30b and the first circuit board 30a by the redundant part reserved by the flexible bending portion 35.
Alternatively, the module string may also include three or more battery modules 20, such as a plurality of first battery modules 20a and one second battery module 20b, or one first battery module 20a and a plurality of second battery modules 20b, etc., which are not described in detail here.
Alternatively, as illustrated in
Alternatively, as illustrated in
Alternatively, the wing portion 62 has a positioning portion 63 extending from the top of the battery module 20 to the bottom of the battery module 20 at an edge of the wing plate 62 away from the support portion 61. The positioning portion 63 is configured to position the battery cells 22 in the battery module 20 in the width direction of the battery pack. The positioning portion 63 can work with the binding tape 24 to further fix the position of the battery cells 22, preventing the battery cells 22 from abnormal shaking and detaching from the original positions, thereby ensuring the overall structural stability of the battery module 20.
Alternatively, as illustrated in the
Alternatively, as illustrated in
Alternatively, the circuit boards 30 are flexible circuit boards, the overall material of which is soft and easy to lay out, and the wire diameter of which is small to save layout space.
Alternatively, the plurality of battery modules 20 are arranged in an array. The plurality of circuit boards 30 are arranged in an array. The plurality of circuit boards 30 in the same column connected in series to form a circuit board string. Circuit board strings are arranged in parallel at intervals along the width direction of battery pack. The battery management system 10 is connected in parallel with the plurality of circuit board strings, so that the battery pack has a larger storage capacity and can effectively collect working condition data such as voltage data, current data and temperature data.
Alternatively, the battery pack may further include a housing 70. The battery management system 10, the battery modules 20 and the circuit boards 30 are all arranged in the housing 70. The housing 70 provides mounting basis and masking protection for related components of the battery pack.
The disclosure also discloses an electricity-consumption device, which includes the aforementioned battery pack 1000. The electricity-consumption device can be an electric vehicle, electric toy, electric tool, electric car, ship and spacecraft, mobile phone, portable device, personal digital assistant (PDA), laptop computer, etc. Taking a vehicle 2000 shown in
It should be noted that the foregoing examples are provided solely for the purpose of illustrating the technical solutions of the present invention and are not intended as limitations. Although a detailed description of the present invention has been provided with reference to the aforementioned examples, those skilled in the art should understand that they may still modify the technical solutions disclosed in the aforementioned examples, or make equivalent substitutions for some or all of the technical features; and such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the present invention as illustrated in the examples.
| Number | Date | Country | Kind |
|---|---|---|---|
| 202311649170.8 | Dec 2023 | CN | national |
