Low-voltage output terminal components and battery pack

Abstract

This invention provides a low-voltage output electrode assembly and a battery pack. The low-voltage output electrode assembly includes: a low-voltage output electrode, which includes a signal acquisition component for acquiring target signals from the cell modules of the battery pack; a base on which the signal acquisition component is mounted; and a sealing frame surrounding the base for sealing the signal acquisition component and the foaming layer during battery pack foaming. This invention solves the problem in related technologies where the low-voltage output electrode of a foamed battery pack cannot effectively prevent foaming contamination.

Description

Technical Field

[0001] This utility model relates to the field of battery technology, and more specifically, to a low-voltage output electrode assembly and a battery pack. Background Technology

[0002] To ensure the normal operation of the power battery, it is necessary to collect voltage and temperature signals from each cell in the battery module. Currently, flexible printed circuit boards (FPCs) are being increasingly widely used in battery module sampling solutions.

[0003] Expanded polystyrene foam is a commonly used material for battery pack encapsulation and sealing, providing excellent insulation and mechanical protection. However, in existing fully expanded polystyrene foam battery packs, the low-voltage output terminal of the module sampling system cannot effectively prevent foam contamination. Once foam enters the low-voltage output terminal, it can lead to sampling failure. This failure not only affects the performance of the battery pack but may also threaten the safety of the entire battery system.

[0004] As can be seen from the above, the relevant technologies have the problem that the low-voltage output pole of the foamed battery pack cannot effectively prevent foam contamination. Utility Model Content

[0005] The main objective of this invention is to provide a low-voltage output electrode assembly and a battery pack to solve the problems in related technologies.

[0006] To achieve the above objectives, according to one aspect of the present invention, a low-voltage output electrode assembly is provided, comprising: a low-voltage output electrode, the low-voltage output electrode including a signal acquisition element for acquiring target signals of the cell modules of a battery pack; a base, the signal acquisition element being disposed on the base; and a sealing frame, the sealing frame surrounding the base, for attaching and sealing the signal acquisition element and the foaming adhesive layer with the foaming fixture during the foaming of the battery pack.

[0007] Furthermore, the low-voltage output electrode also includes an FPC body. The first end of the FPC body is U-shaped and electrically connected to the signal acquisition device. The signal acquisition device is located on the upper section of the U-shape at the first end of the FPC body. The second end of the FPC body extends along the length of the cell module and is used for electrical connection with the cell module.

[0008] Furthermore, the first end of the FPC body includes a pressing section, a bending section and a bottom flat section connected in sequence. The pressing section is located above the base, and the bottom flat section 26 is located below the base 30. The signal acquisition component is disposed on the pressing section, and the pressing section is used to press and fit with the foaming fixture during the foaming of the battery pack.

[0009] Furthermore, the bent section is located on the outer side of the sealing frame, and at least a portion of the crimped section is a stretchable buffer section.

[0010] Furthermore, the base has a through hole, and the bent section passes through the through hole and is located within the sealing frame.

[0011] Furthermore, the base includes a base plate and a protrusion. The protrusion is disposed on the base plate, the signal acquisition component is disposed on the protrusion, and a sealing frame surrounds the protrusion, with the top surface height of the sealing frame being greater than the top surface height of the protrusion.

[0012] Furthermore, the shape of the sealing frame is adapted to the shape of the base plate.

[0013] Furthermore, the sealing frame and the base plate are provided with positioning notches, which are used to position and cooperate with the aluminum busbar at the output end of the battery cell module.

[0014] Furthermore, the protrusion is provided with a snap-fit ​​fastener, and the low-voltage output electrode has a mating structure. The snap-fit ​​fastener engages with the mating structure to snap and fix the low-voltage output electrode.

[0015] According to another aspect of the present invention, a battery pack is provided, including a foam layer and the aforementioned low-voltage output electrode assembly, wherein at least a portion of the low-voltage output electrode assembly is accommodated within the foam layer.

[0016] The present invention provides a low-voltage output electrode assembly comprising a low-voltage output electrode, a base, and a sealing frame. The low-voltage output electrode includes a signal acquisition component for acquiring target signals from the battery cell modules of the battery pack. The signal acquisition component is mounted on the base, and the sealing frame surrounds the base to seal the signal acquisition component and the foam layer during battery pack foaming. By mounting the signal acquisition component on the base and surrounding it with the sealing frame, the periphery of the signal acquisition component is sealed and separated, preventing contact between the foam and the signal acquisition component, thus avoiding contamination of the signal acquisition component and ensuring the normal use of the low-voltage output electrode. This solves the problem in related technologies where the low-voltage output electrode of a foamed battery pack cannot effectively prevent foam contamination. Attached Figure Description

[0017] 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:

[0018] Figure 1 A schematic diagram of the structure of a foamed battery pack according to a specific embodiment of the present invention is shown;

[0019] Figure 2 A schematic diagram of the structure of a battery pack before foaming is shown according to a specific embodiment of the present invention;

[0020] Figure 3 The first embodiment of the present invention is shown. Figure 2 A magnified view of a portion at point A;

[0021] Figure 4 An exploded view of the low-voltage output pole according to Embodiment 1 of the present invention is shown;

[0022] Figure 5 A schematic diagram of the low-voltage output pole according to Embodiment 1 of the present invention is shown;

[0023] Figure 6 A cross-sectional view of the low-voltage output pole assembly according to Embodiment 1 of the present invention is shown;

[0024] Figure 7 A schematic diagram of the base according to Embodiment 2 of the present invention is shown;

[0025] Figure 8 A schematic diagram of the low-voltage output pole according to Embodiment 2 of the present invention is shown;

[0026] Figure 9 The following is an illustration of Embodiment 2 according to the present invention. Figure 2 A magnified view of a portion at point A;

[0027] Figure 10 A cross-sectional view of the low-voltage output electrode assembly according to Embodiment 2 of the present invention is shown.

[0028] The above figures include the following reference numerals:

[0029] 10. Signal acquisition component; 20. FPC body; 21. Crimping section; 22. Bending section; 23. Buffer section; 24. Slot; 25. Connecting plate; 26. Bottom flat section; 30. Base; 31. Base plate; 31. Through hole; 32. Protrusion; 33. Snap-fit ​​fastener; 40. Sealing frame; 41. Positioning notch; 50. Foam layer; 60. Housing; 70. Battery cell module; 71. Output aluminum busbar; 80. Low-voltage output electrode assembly. Detailed Implementation

[0030] 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.

[0031] 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.

[0032] 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.

[0033] To address the problem that the low-voltage output electrode of foamed battery packs in related technologies cannot effectively prevent foam contamination, this utility model provides a low-voltage output electrode assembly and a battery pack.

[0034] like Figures 3 to 6 , Figures 8 to 10 As shown, the low-voltage output electrode assembly includes a low-voltage output electrode, a base 30, and a sealing frame 40. The low-voltage output electrode includes a signal acquisition element 10 for acquiring target signals from the battery cell module 70 of the battery pack. The signal acquisition element 10 is mounted on the base 30. The sealing frame 40 surrounds the base 30 and is used to attach to and seal the signal acquisition element 10 and the foaming adhesive layer 50 during battery pack foaming.

[0035] By placing the signal acquisition component 10 on the base 30 and surrounding the base 30 with the sealing frame 40, the periphery of the signal acquisition component 10 is sealed and separated, thereby preventing the foam from contacting the signal acquisition component 10 and thus preventing the signal acquisition component 10 from being contaminated, ensuring the normal use of the low-voltage output pole.

[0036] In this embodiment, the target signal of the battery cell module 70 includes at least a temperature signal and a voltage signal.

[0037] like Figure 4As shown, the base 30 includes a base plate 31 and a protrusion 32. The protrusion 32 is disposed on the base plate 31, the signal acquisition component 10 is disposed on the protrusion 32, and the sealing frame 40 surrounds the protrusion 32. It can be understood that the middle part of the sealing frame 40 in this embodiment is a hollow area, so that the sealing frame 40 fits onto the protrusion 32.

[0038] In this embodiment, as Figure 6 and Figure 10 As shown, the top surface height of the sealing frame 40 is greater than the top surface height of the protrusion 32. This design allows the sealing frame 40 to more effectively separate the foam layer 50 and the signal acquisition component 10, preventing contamination of the signal acquisition component 10.

[0039] Furthermore, in order to reduce the weight of the base 30, the protrusion 32 in this embodiment is a hollow structure, which can be understood as the middle part of the base plate 31 protruding upward to form the protrusion 32.

[0040] In this embodiment, the shape of the sealing frame 40 is adapted to the shape of the base plate 31. That is, the sealing frame 40 and the base plate 31 are arranged with the same shape vertically. Specifically, the sealing frame 40 in this embodiment is a square frame structure.

[0041] Furthermore, such as Figure 3 and Figure 9 As shown, the sealing frame 40 and the base plate 31 have positioning notches 41, which are used to position and cooperate with the output aluminum busbar 71 of the battery cell module 70. Specifically, the output aluminum busbar 71 has a square structure, and correspondingly, the positioning notch 41 is also square and located on the side of the sealing frame 40 and the base plate 31 near the output aluminum busbar 71. There are two positioning notches 41, which are located at the two ends of the sealing frame 40 and the base plate 31 near the output aluminum busbar 71, respectively, thus corresponding to the two output aluminum busbars 71 of the battery cell module 70. Through the above arrangement, the low-voltage output electrode assembly can be accurately installed and fixed in the preset position.

[0042] like Figures 4 to 5 , Figure 8As shown, the low-voltage output electrode also includes an FPC body 20. The first end of the FPC body 20 is U-shaped and electrically connected to the signal acquisition component 10. The signal acquisition component 10 is located on the upper section of the U-shape at the first end of the FPC body 20. The second end of the FPC body 20 extends along the length of the cell module 70 and is used for electrical connection with the cell module 70. Specifically, in this embodiment, the first end of the FPC body 20 is an upward-folded U-shape, i.e., the U-shaped opening faces the second end, mainly used for electrical connection with the signal acquisition component 10. The remaining part of the FPC body 20 extends along the length of the cell module 70. Further, the cell module 70 includes multiple cells arranged sequentially, with adjacent cells electrically connected via connectors. Connecting tabs are provided on the FPC body 20, and the connecting tabs and connectors are correspondingly provided and welded together, thereby enabling the FPC body 20 and the signal acquisition component 10 to form a sampling circuit to acquire the voltage and temperature of each cell.

[0043] Specifically, such as Figure 3 , Figures 5 to 6 , Figures 8 to 10 As shown, the first end of the FPC body 20 includes a pressing section 21, a bending section 22, and a flat bottom section 26 connected in sequence. The pressing section 21 is located above the base 30, and the flat bottom section 26 is located below the base 30. That is, the flat bottom section 26 is located between the base 30 and the cell module 70. The signal acquisition component 10 is disposed on the pressing section 21, and the pressing section 21 is used to press and fit with the foaming fixture during battery pack foaming. It can be understood that the bending section 22 is relative to the pressing section 21 and the flat bottom section 26. In fact, the bending section 22 is a vertical section, while the pressing section 21 and the flat bottom section 26 are horizontal sections, thus forming a U-shaped structure.

[0044] Furthermore, such as Figures 5 to 6 , Figure 8 and Figure 10 As shown, the FPC body 20 also includes a connecting plate 25, which is disposed on the protrusion 32 and connected and fixed to the bottom surface of the crimping section 21. It can be understood that in this embodiment, the signal acquisition component 10 is disposed on the protrusion 32 via the crimping section 21 and the connecting plate 25.

[0045] In this embodiment, as Figures 7 to 9As shown, the protrusion 32 is provided with a snap-fit ​​fastener 33, and the low-voltage output electrode has a mating structure. The snap-fit ​​fastener 33 engages with the mating structure to secure the low-voltage output electrode. Specifically, the snap-fit ​​fastener 33 is a hook, and the mating structure is a slot 24, thereby achieving the snap-fit ​​engagement. Furthermore, there are two snap-fit ​​fasteners 33, located at opposite ends of the protrusion 32. Correspondingly, slots 24 are provided on both sides of the crimping section 21 to fix the low-voltage output electrode onto the base 30. Of course, when the mating structure is a slot 24, the connecting plate 25 located below the crimping section 21 also has a corresponding clearance notch to avoid interfering with the snap-fit ​​engagement between the hook and the slot 24.

[0046] It should be noted that in this embodiment, when the battery pack is foaming, the foaming fixture will press the sealing frame 40 and / or the crimping section 21 of the FPC body 20. In order to prevent the FPC body 20 from being crushed or damaged, certain protective measures need to be taken.

[0047] Therefore, in this application, the FPC body 20 and the base 30 can be set in various ways, which will be described in detail below.

[0048] Example 1

[0049] In this embodiment, as Figures 5 to 6 As shown, the bent section 22 is located on the outer side of the sealing frame 40, and at least a portion of the crimped section 21 is a stretchable buffer section 23. That is, the first end of the FPC body 20 is entirely located outside the base 30 and the sealing frame 40. Figure 6 As shown, the crimping section 21 is located on the top surface of the base 30 and the sealing frame 40, the bending section 22 is located on the outer side of the sealing frame 40, and the remaining part of the FPC body 20 extends along the bottom surface of the base 30 and the sealing frame 40 to the second end.

[0050] Specifically, in this embodiment, the buffer section 23 is an upwardly convex inverted U-shaped or arched structure. In this embodiment, during foaming, the foaming fixture presses the FPC body 20 and the sealing frame 40 together, and the buffer section 23 is stretched under pressure, releasing the stress on the FPC body 20, thereby preventing the FPC body 20 from being crushed.

[0051] Example 2

[0052] In this embodiment, the crimping section 21 is not provided with a buffer section 23.

[0053] like Figure 7 and Figure 10As shown, the base 30 has a through hole 311, and the bent section 22 passes through the through hole 311 and is located inside the sealing frame 40. That is, in this embodiment, the first end of the FPC body 20 passes through the interior of the base 30 and the sealing frame 40. Figure 10 As shown, the crimping section 21 is located on the top surface of the base 30 and the sealing frame 40, the bending section 22 is located inside the base 30 and the sealing frame 40, and the remaining part of the FPC body 20 extends along the bottom surface of the base 30 and the sealing frame 40 to the second end.

[0054] Specifically, the via 311 is located on the base plate 31 and is close to the protrusion 32.

[0055] In this embodiment, when foaming is performed, the foaming fixture will press the sealing frame 40 tightly. Since the bent section 22 is located inside the base 30 and the sealing frame 40, it prevents the FPC body 20 from being crushed.

[0056] like Figures 1 to 2 As shown, this application also provides a battery pack, including a housing 60, a cell module 70, a foam layer 50 and the aforementioned low-voltage output electrode assembly 80, at least a portion of the low-voltage output electrode assembly 80 being housed within the foam layer 50.

[0057] Specifically, the cell module 70 is housed within the housing 60, and the low-voltage output electrode assembly 80 is mounted on the cell module 70. After the battery pack is foamed, a foam layer 50 is formed inside the housing 60, and a portion of the bottom and periphery of the low-voltage output electrode assembly 80 is housed within the foam layer 50.

[0058] From the above description, it can be seen that the above embodiments of this utility model achieve the following technical effects: The low-voltage output electrode assembly includes a low-voltage output electrode, a base 30, and a sealing frame 40. The low-voltage output electrode includes a signal acquisition element 10, which is used to acquire the target signal of the battery cell module 70 of the battery pack. The signal acquisition element 10 is disposed on the base 30, and the sealing frame 40 is disposed around the base 30. It is used to attach and seal the signal acquisition element 10 and the foaming layer 50 together with the foaming fixture during the foaming of the battery pack. In this way, by disposing of the signal acquisition element 10 on the base 30 and disposing of the sealing frame 40 around the base 30, the periphery of the signal acquisition element 10 is sealed and separated, thereby preventing the foaming adhesive from contacting the signal acquisition element 10, thus preventing the signal acquisition element 10 from being contaminated and ensuring the normal use of the low-voltage output electrode.

[0059] 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.

[0060] 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.

[0061] 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.

[0062] 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 low voltage output pole assembly, characterized by, include: The low-voltage output pole includes a signal acquisition device (10) for acquiring the target signal of the cell module (70) of the battery pack; The base (30) is on which the signal acquisition device (10) is disposed; A sealing frame (40) surrounds the base (30) and is used to seal the signal acquisition element (10) and the foam layer (50) when the battery pack is foamed.

2. The low voltage output pole assembly of claim 1, wherein, The low-voltage output pole also includes an FPC body (20), the first end of which is U-shaped and electrically connected to the signal acquisition device (10). The signal acquisition device (10) is located on the upper section of the U-shape at the first end of the FPC body (20). The second end of the FPC body (20) extends along the length direction of the battery cell module (70) and is used to electrically connect to the battery cell module (70).

3. The low voltage output pole assembly of claim 2, wherein, The first end of the FPC body (20) includes a pressing section (21), a bending section (22) and a bottom flat section (26) connected in sequence. The pressing section (21) is located above the base (30), and the bottom flat section (26) is located below the base (30). The signal acquisition component (10) is disposed on the pressing section (21), and the pressing section (21) is used to press and fit with the foaming fixture during the foaming of the battery pack.

4. The low voltage output pole assembly of claim 3, wherein, The bent section (22) is located on the outer side of the sealing frame (40), and at least a portion of the crimping section (21) is a stretchable buffer section (23).

5. The low voltage output stage assembly of claim 3, wherein, The base (30) has a through hole (311), and the bent section (22) passes through the through hole (311) and is located inside the sealing frame (40).

6. The low-voltage output electrode assembly according to claim 1, characterized in that, The base (30) includes a base plate (31) and a protrusion (32). The protrusion (32) is disposed on the base plate (31). The signal acquisition device (10) is disposed on the protrusion (32). The sealing frame (40) surrounds the protrusion (32), and the top surface height of the sealing frame (40) is greater than the top surface height of the protrusion (32).

7. The low voltage output pole assembly of claim 6, wherein, The shape of the sealing frame (40) is adapted to the shape of the base plate (31).

8. The low voltage output pole assembly of claim 7, wherein, The sealing frame (40) and the base plate (31) are provided with positioning notches (41), which are used to position and cooperate with the output aluminum busbar (71) of the battery cell module (70).

9. The low voltage output stage assembly of claim 6, wherein, The protrusion (32) is provided with a snap-fit ​​fastener (33), and the low-voltage output electrode has a mating structure. The snap-fit ​​fastener (33) engages with the mating structure to snap-fit ​​and fix the low-voltage output electrode.

10. A battery pack, characterized by, It includes a foam layer (50) and a low-voltage output electrode assembly according to any one of claims 1 to 9, wherein at least a portion of the low-voltage output electrode assembly is housed within the foam layer (50).

Images