Battery management system and battery pack

Abstract

The utility model provides a kind of battery management system and battery pack.The battery management system includes: circuit board;At least one first conductive row, first conductive row is set on circuit board;Connecting piece, one end of connecting piece is connected with first conductive row, the other end of connecting piece passes through circuit board and by circuit board remote from the side of first conductive row and project.The utility model solves the problem that the conductive row in relevant technology exists and occupies the large problem of battery pack internal space.

Description

Technical Field

[0001] This utility model relates to the field of battery equipment technology, and more specifically, to a battery management system and a battery pack. Background Technology

[0002] In the field of new energy technology, the battery management system (BMS) is a key component of the battery pack, used to monitor and manage the battery's charging, discharging, and temperature status to ensure safe and efficient operation. Existing battery management systems are typically fixed to the top or bottom cover of the battery pack, and their design and connection methods have certain limitations and problems.

[0003] The design of the busbar on the traditional BMS is relatively complex, such as having claw features (pins) or bending features. These designs not only increase the manufacturing difficulty, but also occupy a lot of space inside the battery pack, limiting the usable volume of the battery pack and affecting the battery capacity density.

[0004] In other words, existing conductive busbars have the problem of occupying a large amount of internal space in the battery pack. Utility Model Content

[0005] The main objective of this invention is to provide a battery management system and battery pack to solve the problem that conductive busbars in related technologies occupy a large amount of internal space in the battery pack.

[0006] To achieve the above objectives, according to one aspect of the present invention, a battery management system is provided, comprising: a circuit board; at least one first conductive bar disposed on the circuit board; and a connector, one end of which is connected to the first conductive bar, and the other end of which passes through the circuit board and extends from the side of the circuit board away from the first conductive bar.

[0007] Furthermore, the first conductive bus and the connector are integrally formed.

[0008] Furthermore, the first conductive busbar has a first mounting through hole, and a portion of the connector extends into the first mounting through hole and connects to the inner wall surface of the first mounting through hole.

[0009] Furthermore, the circuit board is provided with a second mounting through hole corresponding to the first mounting through hole. One end of the connector extends into the first mounting through hole and is connected to the first conductive busbar, while the other end of the connector passes through the second mounting through hole.

[0010] Furthermore, the connector includes a first connecting segment and a second connecting segment connected in sequence, wherein the orthographic projection of the outer wall surface of the first connecting segment onto the second connecting segment is located inside the outer wall surface of the second connecting segment.

[0011] Furthermore, both the first connecting segment and the second connecting segment are cylindrical, and the diameter of the second connecting segment is larger than the diameter of the first connecting segment. A limiting step is formed at the connection between the first connecting segment and the second connecting segment, and the limiting step abuts against the first conductive busbar.

[0012] Furthermore, the connector has a central through hole.

[0013] Furthermore, the first conductive bus has a first mounting through hole, and the end face of one end of the connector is connected to the periphery of the end of the first mounting through hole near the circuit board.

[0014] Furthermore, the first conductive bus also includes a first positioning protrusion, which is located on one side surface of the first conductive bus. The first positioning protrusion and the protrusion of the connector protruding from the first conductive bus are located on the same side.

[0015] According to another aspect of the present invention, a battery pack is provided, including the battery management system described above.

[0016] According to the technical solution of this utility model, the battery management system includes a circuit board, at least one first conductive bus, and a connector. The first conductive bus is disposed on the circuit board. One end of the connector is connected to the first conductive bus, and the other end of the connector passes through the circuit board and extends out from the side of the circuit board away from the first conductive bus.

[0017] The first conductive busbar is tightly connected to the circuit board via a connector, forming a stable electrical connection. Simultaneously, the other end of the connector connects to external components, achieving efficient integration of the battery management system and the battery pack. By directly mounting the first conductive busbar on the circuit board and designing the connector, the traditional busbar adapter is eliminated, significantly simplifying the battery pack structure, reducing material usage, and thus lowering production costs. Eliminating the complex busbar structure and pins frees up more space for the circuit board and other components, making the overall design more compact and suitable for battery packs in confined spaces. Attached Figure Description

[0018] The accompanying drawings, which form part of this application, are used to provide a further understanding of the present invention. The illustrative embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an undue limitation of the present invention. In the drawings:

[0019] Figure 1 A schematic diagram of the battery pack structure of an optional embodiment of the present invention is shown;

[0020] Figure 2 It shows Figure 1 A schematic diagram showing the positional relationship between the battery management system and the top cover;

[0021] Figure 3A schematic diagram of the battery management system of an optional embodiment of the present invention is shown;

[0022] Figure 4 It shows Figure 3 A schematic diagram of the battery management system from one angle;

[0023] Figure 5 It shows Figure 3 A view of the first conductive busbar and connector at an angle;

[0024] Figure 6 It shows Figure 3 Another angle view of the first conductive busbar and connector;

[0025] Figure 7 It shows Figure 6 AA direction view in the middle;

[0026] Figure 8 It shows Figure 3 A view of the second conductive busbar at one angle;

[0027] Figure 9 It shows Figure 3 Another angle view of the second conductive busbar;

[0028] Figure 10 It shows Figure 9 BB view.

[0029] The above figures include the following reference numerals:

[0030] 10. Circuit board; 12. Fourth assembly through hole; 13. Positioning through hole; 20. First conductive busbar; 21. First assembly through hole; 22. First positioning protrusion; 23. First positioning groove; 30. Connector; 31. First connecting section; 32. Second connecting section; 40. Second conductive busbar; 41. Third assembly through hole; 42. Second positioning protrusion; 43. Second positioning groove; 50. Top cover; 60. Module; 70. Data acquisition connector. Detailed Implementation

[0031] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. The following description of at least one exemplary embodiment is merely illustrative and is in no way intended to limit the present utility model or its application or use. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the scope of protection of the present utility model.

[0032] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to this application. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0033] Unless otherwise specifically stated, the relative arrangement, numerical expressions, and values ​​of the components and steps described in these embodiments do not limit the scope of this invention. It should also be understood that, for ease of description, the dimensions of the various parts shown in the drawings are not drawn to actual scale. Techniques, methods, and devices known to those skilled in the art may not be discussed in detail, but where appropriate, such techniques, methods, and devices should be considered part of the specification. In all examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not as limitations. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters in the following drawings denote similar items; therefore, once an item is defined in one drawing, it need not be further discussed in subsequent drawings.

[0034] To address the issue of large internal space occupied by conductive busbars in related technologies, this invention provides a battery management system and a battery pack.

[0035] like Figures 1 to 10 As shown, the battery management system includes a circuit board 10, at least one first conductive bus 20, and a connector 30. The first conductive bus 20 is disposed on the circuit board 10. One end of the connector 30 is connected to the first conductive bus 20, and the other end of the connector 30 passes through the circuit board 10 and extends out from the side of the circuit board 10 away from the first conductive bus 20.

[0036] The first conductive busbar 20 is tightly connected to the circuit board 10 via connector 30, forming a stable electrical connection. Simultaneously, the other end of connector 30 connects to external components, achieving efficient integration of the battery management system and the battery pack. By directly mounting the first conductive busbar 20 on the circuit board 10 and designing connector 30, the traditional busbar adapter is eliminated, greatly simplifying the battery pack structure, reducing material usage, and thus lowering production costs. Eliminating the complex busbar structure and pins frees up more space for the circuit board 10 and other components, making the overall design more compact and suitable for battery packs in limited spaces.

[0037] In some alternative embodiments, please refer to Figure 7The first conductive bus 20 has a first mounting through hole 21, and a portion of the connector 30 extends into the first mounting through hole 21 and connects to the inner wall surface of the first mounting through hole 21. Setting the first conductive bus 20 and the connector 30 as separate structures helps reduce the manufacturing process and cost of the first conductive bus 20 and the connector 30. Simultaneously, the first conductive bus 20 and the connector 30 can be connected by welding. Extending a portion of the connector 30 into the first mounting through hole 21 and connecting it to the inner wall surface of the first mounting through hole 21 ensures a sufficient connection area between the connector 30 and the first conductive bus 20. This not only guarantees the stability of the connection, preventing it from being affected by external factors such as vibration, but also ensures good electrical contact between the connector 30 and the first conductive bus 20, thereby ensuring efficient current transmission.

[0038] Furthermore, the pre-designed first mounting through-hole 21 simplifies the assembly process. Operators simply align the connector 30 correctly and insert it into the first mounting through-hole 21, then weld it. This simple assembly process improves production efficiency and cost-effectiveness. The design of the first mounting through-hole 21 also allows for greater flexibility in space utilization of the first conductive bus 20. Since no additional adapters or complex shapes are needed for connection, the first conductive bus 20 can be designed to be more compact, saving space within the battery pack, which is particularly important for battery management in confined spaces.

[0039] In some alternative embodiments, the circuit board 10 is provided with a second mounting through hole corresponding to the first mounting through hole 21. One end of the connector 30 extends into the first mounting through hole 21 and connects to the first conductive bus 20, while the other end of the connector 30 passes through the second mounting through hole. The other end of the connector 30 is located outside the second mounting through hole to facilitate connection between the connector 30 and other structures. This arrangement can more effectively utilize the internal space of the battery pack. The design of the first mounting through hole 21 and the second mounting through hole allows the connector 30 to connect to the first conductive bus 20 in the vertical direction, thereby reducing the need for protruding or bent structures, reducing space occupation, leaving more usable space for other components, and facilitating the optimization of the overall layout.

[0040] During assembly, the connector 30 can be soldered to the first conductive bus 20 first, and then the connector 30 can be inserted into the second assembly through hole, with a portion of the connector 30 extending to the outside of the second assembly through hole. Alternatively, the first conductive bus 20 can be assembled with the circuit board 10 first, and then one end of the connector 30 can be inserted through the second assembly through hole into the first assembly through hole 21 and connected to the first conductive bus 20.

[0041] Optionally, the second mounting through hole has the same diameter as the first mounting through hole 21. Of course, the diameters of the second mounting through hole and the first mounting through hole 21 can also be different; no specific limitation is made here.

[0042] In some alternative embodiments, please refer to Figure 7 The connector 30 includes a first connecting segment 31 and a second connecting segment 32 connected sequentially. The orthographic projection of the outer wall surface of the first connecting segment 31 onto the second connecting segment 32 is located inside the outer wall surface of the second connecting segment 32. This arrangement creates a limiting step at the connection between the second connecting segment 32 and the first connecting segment 31. The limiting step abuts against the first conductive busbar 20, effectively increasing the direct contact area between the connector 30 and the first conductive busbar 20. This ensures the tightness of the connection between the first conductive busbar 20 and the connector 30, as well as the stability of the electrical connection, guaranteeing the efficiency of current transmission and the electrical performance of the system.

[0043] Optionally, both the first connecting segment 31 and the second connecting segment 32 are cylindrical, with the diameter of the second connecting segment 32 being larger than the diameter of the first connecting segment 31. Setting the first connecting segment 31 and the second connecting segment 32 as cylindrical not only facilitates their fabrication but also makes it easier to assemble the first connecting segment 31 with the first mounting through hole 21, eliminating the need for repeated adjustments to align the first connecting segment 31 with the first mounting through hole 21 and effectively saving assembly time.

[0044] In some alternative embodiments, the connector 30 has a central through hole. During assembly, it can be connected to other structural components through the central through hole without the need for other positioning aids, thus improving assembly efficiency and accuracy.

[0045] In some alternative embodiments, such as Figure 5 and Figure 7 As shown, the first conductive busbar 20 also includes a first positioning protrusion 22, which is located on one side surface of the first conductive busbar 20. The first positioning protrusion 22 and the connector 30 protrude from the protrusion of the first conductive busbar 20 and are located on the same side. The presence of the first positioning protrusion 22 provides a visual reference point for the installation of the first conductive busbar 20 and the circuit board 10, ensuring precise alignment of the first conductive busbar 20 and the circuit board 10 during the assembly process. At the same time, the connector 30 can also serve as a positioning element during the installation of the first conductive busbar 20 and the circuit board 10, so as to facilitate the quick and accurate assembly of the first conductive busbar 20 and the circuit board 10 together.

[0046] In some alternative embodiments, such as Figure 6 As shown, the first conductive busbar 20 has a first positioning groove 23 on the side surface opposite to the first positioning protrusion 22, and the first positioning groove 23 is positioned directly opposite to the first positioning protrusion 22. That is, the orthographic projection of the first positioning groove 23 on the side surface with the first positioning protrusion 22 is located on the first positioning protrusion 22.

[0047] In some alternative embodiments, the first conductive bus 20 and the connector 30 are integrally formed (not shown in the figure). This integral forming reduces the number of components and assembly steps, thereby reducing the complexity of the manufacturing process. Additional connection steps, such as welding or riveting, are no longer required, saving time and reducing the risk of potential manufacturing defects. Compared to welding or other methods of connection, integral forming effectively reduces the risk of separation between the first conductive bus 20 and the connector 30, improving the structural integrity of the entire system. This is particularly important for environments subjected to vibration and shock, ensuring long-term reliable performance.

[0048] In addition, one-piece molding can reduce contact resistance, reduce energy loss, and improve system efficiency.

[0049] In another alternative embodiment, the first conductive bus 20 has a first mounting through hole 21, and one end face of the connector 30 is connected to the periphery of the first mounting through hole 21 near the end of the circuit board 10 (not shown in the figure). This arrangement facilitates the assembly of the first conductive bus 20 and the connector 30 together, while ensuring the contact area between the first conductive bus 20 and the connector 30, which can effectively ensure the stability of electrical transmission between the two.

[0050] Preferably, the number of first conductive bars 20 is the same as the number of connectors 30, and the multiple connectors 30 are connected to the multiple first conductive bars 20 in a one-to-one correspondence.

[0051] In one specific embodiment, there are two first conductive busbars 20 and two connectors 30, one of which is positively charged and the other is negatively charged.

[0052] In one specific embodiment, the battery management system further includes at least one second conductive bus 40, which is disposed on the circuit board 10 and spaced apart from the first conductive bus 20.

[0053] Specifically, there are two second conductive busbars 40, one of which is positively charged and the other is negatively charged.

[0054] like Figure 9 As shown, the second conductive bus 40 has a third mounting through hole 41, and the circuit board 10 has a fourth mounting through hole 12 corresponding to the third mounting through hole 41, so that fasteners can be inserted into the third mounting through hole 41 and the fourth mounting through hole 12 to mount the second conductive bus 40 onto the circuit board 10.

[0055] like Figure 8 and Figure 10As shown, a second positioning protrusion 42 is provided on the side surface of the second conductive bus 40 facing the circuit board 10, so as to facilitate the precise positioning of the second conductive bus 40 and the circuit board 10 during the assembly process.

[0056] In some alternative embodiments, such as Figure 9 and Figure 10 As shown, the second conductive busbar 40 has a second positioning groove 43 on the side surface opposite to the second positioning protrusion 42, and the second positioning groove 43 is positioned directly opposite the second positioning protrusion 42. That is, the orthographic projection of the second positioning groove 43 on the side surface with the second positioning protrusion 42 is located on the second positioning protrusion 42.

[0057] The first conductive bus 20, the second conductive bus 40, and the connector 30 can be made of copper or aluminum; no specific limitation is made here. Preferably, the first conductive bus 20 and the connector 30 are made of the same material.

[0058] In some alternative embodiments, the circuit board 10 has a plurality of positioning through holes 13, which cooperate with the first positioning protrusion 22 and the second positioning protrusion 42 to facilitate the rapid positioning and assembly of the first conductive bus 20, the second conductive bus 40 and the circuit board 10.

[0059] In some alternative embodiments, the battery management system further includes a data acquisition connector 70, which is disposed on the circuit board 10 and is located on opposite sides of the circuit board 10, respectively, as is the first conductive bar 20.

[0060] Alternatively, the battery management system can be a 12V lithium battery management system.

[0061] In some alternative embodiments, the battery pack includes the aforementioned battery management system. Integrating the battery management system into the battery pack improves the overall performance of the battery pack. The battery pack not only exhibits excellent battery performance but also shows significant improvements in structural compactness, cost control, and safety.

[0062] The battery pack also includes a top cover 50 and a module 60. The battery management system is fixed to the top cover 50 by fasteners, and the module 60 is fixed to the battery management system by fasteners. At the same time, at least two connectors 30 on the battery management system are connected to the conductive busbars on the module 60.

[0063] In one specific embodiment, the two connectors 30 are respectively connected to the two conductive bars on the module 60, and the two second conductive bars 40 are connected to the top cover 50.

[0064] As can be seen from the above description, the embodiments of this utility model achieve the following technical effects:

[0065] 1. The battery management system has a simple structure and small size, making it easy to assemble with various battery packs;

[0066] 2. The cooperation between the first conductive busbar 20 and the connector 30 in the battery management system reduces the claw structure (pin) or bending structure in the battery management system, leaving more usable space inside the battery pack.

[0067] 3. The cooperation between the first conductive bar 20 and the connector 30 in the battery management system reduces the need for a busbar adapter to connect to the module 60 and the top cover 50.

[0068] In the description of this utility model, it should be understood that the directional terms such as "front, back, up, down, left, right", "horizontal, vertical, horizontal" and "top, bottom" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description. Unless otherwise stated, these directional terms do not indicate or imply that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on the scope of protection of this utility model. The directional terms "inner" and "outer" refer to the inner and outer contours of each component itself.

[0069] For ease of description, spatial relative terms such as "above," "on top of," "on the upper surface of," "above," etc., are used herein to describe the spatial positional relationship of a device or feature as shown in the figures to other devices or features. It should be understood that spatial relative terms are intended to encompass different orientations in use or operation beyond the orientation of the device as described in the figures. For example, if the device in the figures were inverted, a device described as "above" or "on top of" other devices or structures would subsequently be positioned as "below" or "under" other devices or structures. Thus, the exemplary term "above" can include both "above" and "below." The device may also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatial relative descriptions used herein will be interpreted accordingly.

[0070] Furthermore, it should be noted that the use of terms such as "first" and "second" to define components is merely for the purpose of distinguishing the corresponding components. Unless otherwise stated, the above terms have no special meaning and therefore cannot be construed as limiting the scope of protection of this utility model.

[0071] The above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A battery management system, characterized in that, include: Circuit board (10); At least one first conductive bus (20) is disposed on the circuit board (10); At least one connector (30) is provided, one end of which is connected to the first conductive bus (20), and the other end of which passes through the circuit board (10) and extends from the side of the circuit board (10) away from the first conductive bus (20).

2. The battery management system according to claim 1, characterized in that, The first conductive bus (20) and the connector (30) are integrally formed.

3. The battery management system according to claim 1, characterized in that, The first conductive bus (20) has a first mounting through hole (21), and a portion of the connector (30) extends into the first mounting through hole (21) and is connected to the inner wall surface of the first mounting through hole (21).

4. The battery management system according to claim 3, characterized in that, The circuit board (10) is provided with a second mounting through hole corresponding to the first mounting through hole (21). One end of the connector (30) extends into the first mounting through hole (21) and is connected to the first conductive bus (20). The other end of the connector (30) passes through the second mounting through hole.

5. The battery management system according to claim 3, characterized in that, The connector (30) includes a first connecting segment (31) and a second connecting segment (32) connected in sequence. The orthographic projection of the outer wall surface of the first connecting segment (31) onto the second connecting segment (32) is located inside the outer wall surface of the second connecting segment (32).

6. The battery management system according to claim 5, characterized in that, Both the first connecting segment (31) and the second connecting segment (32) are cylindrical. The diameter of the second connecting segment (32) is larger than the diameter of the first connecting segment (31). A limiting step is formed at the connection between the first connecting segment (31) and the second connecting segment (32), and the limiting step abuts against the first conductive busbar (20).

7. The battery management system according to any one of claims 1 to 6, characterized in that, The connector (30) has a central through hole.

8. The battery management system according to claim 1, characterized in that, The first conductive bus (20) has a first mounting through hole (21), and the end face of one end of the connector (30) is connected to the periphery of the end of the first mounting through hole (21) near the circuit board (10).

9. The battery management system according to any one of claims 1 to 6, characterized in that, The first conductive busbar (20) further includes a first positioning protrusion (22), which is located on one side surface of the first conductive busbar (20). The first positioning protrusion (22) and the connector (30) protrude from the protrusion of the first conductive busbar (20) and are located on the same side.

10. A battery pack, characterized in that, The battery management system includes any one of claims 1 to 9.

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