FPC assembly, battery module and battery pack

Abstract

The utility model relates to the technical field of batteries, particularly provides an FPC (Flexible Printed Circuit) assembly, a battery module and a battery pack, and aims to solve the problems that a connector in an existing double-layer FPC is not firmly fixed and has a falling risk. Therefore, the FPC assembly provided by the utility model is applied to the battery module, the battery module comprises a plurality of columns of battery cells and an end plate, the end plate is arranged on one side of the plurality of columns of battery cells, the FPC assembly is arranged at the top of the plurality of columns of battery cells, and the FPC assembly comprises a first fixed bracket, and a first FPC board and a second FPC board which are overlapped from bottom to top, a first connector and a second connector are arranged at the end of the first FPC board and the end of the second FPC board respectively, the first connector is fixed to the end plate, the first fixing support is arranged above the first connector and fixedly connected with the end plate, and the second connector is arranged on the first fixing support. Therefore, the first connector and the second connector can be firmly fixed, and the risk of falling off is avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of batteries, and specifically provides an FPC component, a battery module and a battery pack. Background Art

[0002] Flexible Printed Circuit (FPC) is a highly reliable and extremely flexible printed circuit board made of polyimide or polyester film as the substrate. It has the characteristics of high wiring density, light weight, thin thickness and good bendability. It can monitor the status of the battery pack (such as voltage, current, temperature, etc.) in real time to ensure the safety and stability of the battery.

[0003] In the prior art, most FPCs in battery packs are single-layered. However, with the development of battery technology and the increasing requirements for battery safety, the traditional single-layer board cannot meet the layout requirements of the temperature sensing sampling line and the voltage sampling line, and the FPC needs to be designed as a double-layer structure. However, the connectors of the existing double-layer FPC are generally fixed together by gluing, and then fixed to the battery module. During long-term use, the structural glue between the connectors is prone to aging, and there is a risk of falling off after vibration, which can easily cause the connector terminals to be poorly connected and broken, affecting the safety of the battery pack.

[0004] Therefore, this field needs a new technical solution to solve the above problems. Utility Model Content

[0005] The utility model aims to solve the above technical problem, that is, to solve the problem that the connector in the existing double-layer FPC is not firmly fixed and there is a risk of falling off.

[0006] In a first aspect, the utility model provides an FPC assembly, which is applied to a battery module, wherein the battery module includes multiple columns of battery cells and an end plate, wherein the end plate is arranged on one side of the multiple columns of battery cells, and the FPC assembly is arranged on the top of the multiple columns of battery cells, and the FPC assembly includes a first fixed bracket and a first FPC board and a second FPC board overlapped from bottom to top, wherein the ends of the first FPC board and the second FPC board are respectively provided with a first connector and a second connector, the first connector is fixed on the end plate, the first fixed bracket is arranged above the first connector and fixedly connected to the end plate, and the second connector is arranged on the first fixed bracket.

[0007] In a preferred technical solution of the above FPC assembly, the FPC assembly further includes a second fixing bracket, which is disposed above the second connector and fixedly connected to the first fixing bracket.

[0008] In the preferred technical solution of the above FPC assembly, the first fixing bracket includes a first supporting plate and two first supporting legs arranged at intervals, the first supporting plate is arranged between the two first supporting legs and connected to one end of the first supporting leg, and the other end of the first supporting leg is fixed to the end plate;

[0009] The second fixing bracket includes a second supporting plate and two second supporting legs arranged at intervals, the second supporting plate is arranged between the two second supporting legs and connected to one end of the second supporting leg, and the other end of the second supporting leg is fixed to the first supporting plate.

[0010] In a preferred technical solution of the above FPC assembly, the top surface of the first connector abuts against the bottom surface of the first support plate.

[0011] In a preferred technical solution of the above FPC assembly, the second connector is arranged on the top surface of the first support plate and the top surface of the second connector abuts against the bottom surface of the second support plate.

[0012] In the preferred technical solution of the above-mentioned FPC assembly, the FPC assembly also includes a connecting piece, the first fixing bracket and the second fixing bracket are respectively provided with a first connecting hole and a second connecting hole, the end plate is provided with a mounting portion, the connecting piece passes through the first connecting hole and the second connecting hole and is fixedly connected to the mounting portion.

[0013] In the preferred technical solution of the above FPC assembly, the connecting member is a bolt or a screw, and the mounting portion is a threaded hole.

[0014] In the preferred technical solution of the above FPC assembly, an epoxy board is arranged between the first connector and the end plate.

[0015] In a second aspect, the utility model provides a battery module, including a steel strip and the above-mentioned FPC assembly.

[0016] In a third aspect, the utility model provides a battery pack, including a lower tray, an upper cover and the above-mentioned battery module.

[0017] It can be understood by those skilled in the art that the technical solution of the present utility model provides an FPC assembly, which is applied to a battery module. The battery module includes multiple columns of battery cells and an end plate. The end plate is arranged on one side of the multiple columns of battery cells. The FPC assembly is arranged on the top of the multiple columns of battery cells. The FPC assembly includes a first fixing bracket and a first FPC board and a second FPC board arranged overlapping from bottom to top. The ends of the first FPC board and the second FPC board are respectively provided with a first connector and a second connector. The first connector is fixed to the end plate. The first fixing bracket is arranged above the first connector and is fixedly connected to the end plate. The second connector is arranged on the first fixing bracket. In the case of adopting the above technical solution, the present utility model can firmly fix the first connector and the second connector, effectively prevent the risk of the first connector and the second connector falling off, thereby ensuring the accuracy of the FPC's state monitoring of the battery pack and improving the safety of the battery pack. Specifically, the present utility model sets a first fixing bracket above the first connector, fixes the second connector on the bracket, and fixes the first connector on the end plate, so as to realize the separation of the first connector and the second connector, avoiding the risk of the first connector and the second connector being easily fallen off when fixed together by gluing.

[0018] Furthermore, the FPC assembly of the utility model further includes a second fixing bracket, which is arranged above the second connector and fixedly connected to the first fixing bracket. This arrangement can limit the second connector and further improve the fixing effect of the second connector. In addition, in the vibration and impact environment that the battery pack may encounter, the second fixing bracket can provide additional protection to prevent the second connector from being damaged.

[0019] Furthermore, the first fixing bracket of the utility model includes a first support plate and two first support legs arranged at intervals, the first support plate is arranged between the two first support legs and connected to one end of the first support leg, and the other end of the first support leg is fixed to the end plate; the second fixing bracket includes a second support plate and two second support legs arranged at intervals, the second support plate is arranged between the two second support legs and connected to one end of the second support leg, and the other end of the second support leg is fixed to the first support plate. Through this structural setting, the stability of the first fixing bracket and the second fixing bracket and the fixing effect of the first connector and the second connector can be enhanced, so that the first connector and the second connector are not easy to loosen or be damaged when subjected to vibration or impact, thereby further improving the safety of the battery pack.

[0020] Furthermore, the top surface of the first connector of the utility model abuts against the bottom surface of the first support plate. Through this arrangement, the bottom surface of the first connector is fixed to the end plate, and the top surface contacts the bottom surface of the first support plate, thereby clamping the first connector between the first support plate and the end plate, limiting the position of the first connector, thereby ensuring that the position of the first connector does not change, improving the fixing effect of the first connector, and further preventing the first connector from loosening.

[0021] Furthermore, the second connector of the utility model is arranged on the top surface of the first support plate and the top surface of the second connector abuts against the bottom surface of the second support plate. Through this arrangement, the bottom surface of the second connector is fixed on the top surface of the first support plate, and the top surface of the second connector contacts the bottom surface of the second support plate, thereby clamping the second connector between the first support plate and the second support plate, improving the fixing effect of the second connector and further preventing the second connector from loosening. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The preferred embodiments of the present invention are described below in conjunction with the accompanying drawings, in which:

[0023] Figure 1 It is a structural schematic diagram of a battery module of the utility model;

[0024] Figure 2 It is a structural schematic diagram of the first fixing bracket of the utility model;

[0025] Figure 3 It is a structural schematic diagram of the second fixing bracket of the utility model.

[0026] List of reference numerals:

[0027] 100, battery module; 101, battery cell; 102, end plate;

[0028] 1. First fixing bracket; 11. First supporting plate; 12. First supporting leg; 13. First connecting hole;

[0029] 2. a first FPC board; 21. a first connector;

[0030] 3. A second FPC board; 31. A second connector;

[0031] 4. Second fixing bracket; 41. Second supporting plate; 42. Second supporting leg; 43. Second connecting hole. DETAILED DESCRIPTION

[0032] The preferred embodiments of the present invention are described below with reference to the accompanying drawings. It should be understood by those skilled in the art that these embodiments are only used to explain the technical principles of the present invention and are not intended to limit the scope of protection of the present invention. For example, although the following embodiments are introduced in conjunction with a battery pack, the FPC assembly provided by the present invention is also applicable to other products that need to solve the problem that the connector in the FPC is not firmly fixed and there is a risk of falling off.

[0033] It should be noted that, in the description of the present invention, unless otherwise clearly specified and limited, the terms "disposed" and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection. For those skilled in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0034] Based on the problem pointed out in the background technology that the connectors in the existing double-layer FPC are not firmly fixed and there is a risk of falling off, the utility model provides an FPC assembly, a battery module and a battery pack, which aims to fix the two connectors in the double-layer FPC assembly by setting a fixing bracket, so as to effectively solve the problem of the connectors not being firmly fixed.

[0035] First refer to Figure 1 ,in, Figure 1 It is a structural schematic diagram of a battery module of the utility model.

[0036] like Figure 1 As shown, the utility model provides an FPC assembly, which is applied to a battery module 100. The battery module 100 includes a plurality of columns of battery cells 101 and an end plate 102. The end plate 102 is arranged on one side of the plurality of columns of battery cells 101. The FPC assembly is arranged on the top of the plurality of columns of battery cells 101. The FPC assembly includes a first fixing bracket 1 and a first FPC board 2 and a second FPC board 3 overlappingly arranged from bottom to top. The ends of the first FPC board 2 and the second FPC board 3 are respectively provided with a first connector 21 and a second connector 31. The first connector 21 is fixed on the end plate 102. The first fixing bracket 1 is arranged above the first connector 21 and fixedly connected to the end plate 102. The second connector 31 is arranged on the first fixing bracket 1.

[0037] The first FPC board 2 and the second FPC board 3 are the core parts of the FPC assembly, which are responsible for the transmission of signals and / or power. By overlapping the first FPC board 2 and the second FPC from bottom to top, the space occupation can be reduced, the compactness of the FPC assembly as a whole can be improved, and the accuracy of monitoring the battery module 100 can be improved; the first connector 21 and the second connector 31 are respectively arranged at the ends of the first FPC board 2 and the second FPC board 3, which are used to establish connections with external devices or other components in the battery module 100. The utility model sets a first fixing bracket 1 above the first connector 21, fixes the second connector 31 on the bracket, and fixes the first connector 21 on the end plate 102, so as to realize the first connector 21 and the second connector 31 being fixed separately, avoiding the risk of the first connector 21 and the second connector 31 being easily detached when being fixed together by gluing. In addition, the first fixing bracket 1 can also provide mechanical protection for the first connector 21 to prevent the first connector 21 from being damaged in vibration and impact environments of the battery pack; further, the first fixing bracket 1 also ensures the correct position and fixation of the first connector 21, thereby ensuring the stability of signal transmission.

[0038] Furthermore, the first connector 21 in the present invention is fixed to the end plate 102 by gluing, and the second connector 31 is fixed to the first fixing bracket 1 by gluing. This ensures close contact and stable fixation between the first connector 21 and the end plate 102 and between the second connector 31 and the first fixing bracket 1, effectively preventing dust, moisture and other contaminants from entering the gap between the first connector 21 and the end plate 102 and the gap between the second connector 31 and the first fixing bracket 1, effectively improving the reliability of the electrical connection between the first connector 21 and the second connector 31 and extending the service life of the first connector 21 and the second connector 31, and helping to save space.

[0039] In addition, in other embodiments, the first connector 21 can be fixed to the end plate 102 by welding, crimping or other methods, and the second connector 31 can also be fixed to the first fixing bracket 1 by welding, crimping or other methods. The utility model does not specifically limit the fixing method of the first connector 21 and the second connector 31, as long as the stability and reliability of the fixation of the first connector 21 and the second connector 31 can be ensured.

[0040] Preferably, if Figure 1 As shown, the FPC assembly further includes a second fixing bracket 4 , which is disposed above the second connector 31 and fixedly connected to the first fixing bracket 1 .

[0041] By arranging the second fixing bracket 4 above the second connector 31 and fixedly connected to the first fixing bracket 1, the second connector 31 is located between the first fixing bracket 1 and the second fixing bracket 4, so that the second connector 31 can be protected. In the vibration and impact environment that the battery pack may encounter, the second fixing bracket 4 provides additional protection to prevent the second connector 31 from being damaged. In addition, the second fixing bracket 4 can limit the second connector 31 to further improve the fixing effect of the second connector 31. Furthermore, by arranging the second fixing bracket 4, the overall strength of the FPC assembly can be enhanced, especially the support of the second connector 31 and any additional components (such as protective covers, heat sinks, etc.) that may exist above it can be enhanced.

[0042] Preferably, if Figure 2 As shown, the first fixed bracket 1 includes a first support plate 11 and two first support legs 12 arranged at intervals, the first support plate 11 is arranged between the two first support legs 12 and connected to one end of the first support leg 12, and the other end of the first support leg 12 is fixed to the end plate 102; the second fixed bracket 4 includes a second support plate 41 and two second support legs 42 arranged at intervals, the second support plate 41 is arranged between the two second support legs 42 and connected to one end of the second support leg 42, and the other end of the second support leg 42 is fixed to the first support plate 11.

[0043] The first support plate 11 is the main bearing part of the first fixing bracket 1, and is used to support and fix the first FPC board 2 and the first connector 21 thereon. It is located between the two first support legs 12 and is firmly connected to one end of them to form a stable support platform. The two first support legs 12 are key components connecting the first support plate 11 and the end plate 102, and they are arranged at intervals to ensure the stability and balance of the support plate.

[0044] like Figure 3As shown, the second fixing bracket 4 includes a second support plate 41 and two second support legs 42 arranged at intervals. The second support plate 41 is arranged between the two second support legs 42 and connected to one end of the second support leg 42, and the other end of the second support leg 42 is fixed to the first support plate 11. The second support plate 41 is similar to the first support plate 11. The second support plate 41 is also used to support and fix the second FPC board 3 and the second connector 31 thereon. It is located between the two second support legs 42 and connected to one end of them to form a stable support structure. The two second support legs 42 connect the second support plate 41 with the first fixing bracket 1, and they are arranged at intervals to ensure the stability and balance of the second support plate 41. The other end of the second support leg 42 is fixed to the first support plate 11, so that the second fixing bracket 4 can be stably installed on the first fixing bracket 1, thereby forming a complete FPC assembly support system. As a result, the fixing effect of the first connector 21 and the second connector 31 is better, so that the first connector 21 and the second connector 31 are not easy to loosen or be damaged when subjected to vibration or impact, thereby further improving the safety of the battery pack.

[0045] Preferably, the top surface of the first connector 21 abuts against the bottom surface of the first support plate 11 .

[0046] Through this structural setting, on the basis of the first connector 21 being glued to the end plate 102, the top surface of the first connector 21 abuts against the bottom surface of the first support plate 11, so that the first connector 21 is clamped between the first support plate 11 and the end plate 102, thereby limiting the first connector 21 and preventing the first connector 21 from shaking, thereby ensuring that the position of the first connector 21 does not change, improving the firmness of the bonding between the first connector 21 and the end plate 102, and further preventing the first connector 21 from loosening and falling off.

[0047] Preferably, the second connector 31 is disposed on the top surface of the first support plate 11 and the top surface of the second connector 31 abuts against the bottom surface of the second support plate 41 .

[0048] With this structural setting, on the basis of the second connector 31 being glued to the first support plate 11, the top surface of the second connector 31 abuts against the bottom surface of the second support plate 41, so that the second connector 31 is clamped between the first support plate 11 and the second support plate 41, and the second connector 31 is limited to prevent the second connector 31 from shaking, thereby ensuring that the position of the second connector 31 does not change, improving the firmness of the bonding between the second connector 31 and the first support plate 11, and further preventing the second connector 31 from loosening and falling off.

[0049] Preferably, if Figure 2 and Figure 3As shown, the FPC assembly also includes a connector, and the first fixing bracket 1 and the second fixing bracket 4 are respectively provided with a first connecting hole 13 and a second connecting hole 43, and a mounting portion is provided on the end plate 102, and the connector passes through the first connecting hole 13 and the second connecting hole 43 and is fixedly connected to the mounting portion.

[0050] By passing the connecting piece through the second connecting hole 43 and the first connecting hole 13 in sequence and then fixing them with the mounting portion, the first fixing bracket 1 is firmly fixed to the end plate 102 and the second fixing bracket 4 is firmly fixed to the first fixing bracket 1, ensuring that the various parts of the FPC assembly can be tightly combined together to form a stable and reliable overall structure.

[0051] Preferably, the connecting member is a bolt or a screw, and the mounting portion is a threaded hole. Thus, through threaded cooperation, sufficient fastening force can be provided to firmly fix the first fixing bracket 1 and the second fixing bracket 4 to ensure the stability and reliability of the FPC assembly under various working conditions. In addition, the bolts and screws can be easily tightened and loosened, which makes the assembly, disassembly and maintenance of the FPC assembly relatively simple.

[0052] Furthermore, washers are also provided on the bolts or screws in the present invention, so as to increase the firmness of the connection between the first fixing bracket 1 and the second fixing bracket 4 and the end plate 102 and prevent loosening. For example, the washers can be rubber washers, spring washers, etc. The present invention does not specifically limit the types of washers, as long as they can prevent the bolts or screws from loosening.

[0053] Preferably, an epoxy board is provided between the first connector 21 and the end plate 102 .

[0054] The epoxy board has excellent insulation performance, and can effectively isolate the current between the first connector 21 and the end plate 102, preventing short circuits and electrical failures. In addition, the epoxy board has good chemical stability and thermal stability, and can resist the corrosion of the connector by the external environment, thereby extending the service life of the first connector 21. Furthermore, the epoxy board can also provide certain structural support for the first connector 21, thereby enhancing the stability of its installation.

[0055] Exemplarily, the first connector 21 in the present invention is fixed to the epoxy board by gluing, and the epoxy board is fixed to the end plate 102 by gluing. Further, in other embodiments, the epoxy board can also be fixed to the end plate 102 by screws, buckles, etc. The present invention does not specifically limit the specific fixing method of the epoxy board, as long as the fixing effect of the epoxy board can be guaranteed.

[0056] In a second aspect, the utility model provides a battery module 100, including a steel strip and the above-mentioned FPC assembly.

[0057] The steel belt is mainly used to fix and protect the battery cell 101 in the battery module 100. It can firmly fix the battery cell 101 inside the module to prevent the battery cell 101 from moving or being damaged under vibration and impact. At the same time, the steel belt can also provide additional structural support, enhance the overall rigidity and stability of the module, so that the module can maintain its shape when subjected to external pressure or load, and extend its service life. In addition, the battery module 100 has the above-mentioned FPC assembly, thereby ensuring that the connectors in the double-layer FPC in the battery module 100 are firmly fixed, effectively avoiding the risk of the first connector 21 and the second connector 31 falling off, ensuring the accuracy of the FPC's status monitoring of the battery pack, and improving the safety of the battery module 100.

[0058] In a third aspect, the utility model provides a battery pack, including a lower tray, an upper cover and the above-mentioned battery module 100.

[0059] The lower tray is used to support and fix the battery module 100, and can provide a certain degree of protection to prevent the battery module 100 from being damaged by bottom impact, corrosion, etc.; the upper cover is the top structure of the battery pack, which mainly plays the role of sealing and protecting the battery module 100. It is tightly connected to the lower tray through the sealing material to form a closed space for placing and protecting the battery module 100. In addition, the battery pack has the battery module 100 of the above-mentioned FPC assembly, so it has all the advantages of the FPC assembly structure, and can firmly fix the connectors in the double-layer FPC, effectively avoiding the risk of the first connector 21 and the second connector 31 falling off, thereby ensuring the accuracy of the FPC's status monitoring of the battery pack and improving the safety of the battery pack.

[0060] So far, the technical solution of the utility model has been described in conjunction with the preferred embodiments shown in the accompanying drawings, but it is easy for those skilled in the art to understand that the protection scope of the utility model is obviously not limited to these specific embodiments. Without departing from the principle of the utility model, those skilled in the art can make equivalent changes or substitutions to the relevant technical features, and the technical solutions after these changes or substitutions will fall within the protection scope of the utility model.

Claims

1. An FPC assembly, applied to a battery module (100), the battery module (100) comprising a plurality of columns of battery cells (101) and an end plate (102), the end plate (102) being arranged on one side of the plurality of columns of battery cells (101), the FPC assembly being arranged on the top of the plurality of columns of battery cells (101), characterized in that: The FPC assembly comprises a first fixing bracket (1) and a first FPC board (2) and a second FPC board (3) which are overlapped from bottom to top, wherein the ends of the first FPC board (2) and the second FPC board (3) are respectively provided with a first connector (21) and a second connector (31), the first connector (21) is fixed on the end plate (102), the first fixing bracket (1) is arranged above the first connector (21) and is fixedly connected to the end plate (102), and the second connector (31) is arranged on the first fixing bracket (1).

2. The FPC assembly according to claim 1, characterized in that: The FPC assembly further comprises a second fixing bracket (4), wherein the second fixing bracket (4) is arranged above the second connector (31) and is fixedly connected to the first fixing bracket (1).

3. The FPC assembly according to claim 2, characterized in that: The first fixing bracket (1) comprises a first supporting plate (11) and two first supporting legs (12) arranged at intervals, the first supporting plate (11) being arranged between the two first supporting legs (12) and connected to one end of the first supporting leg (12), and the other end of the first supporting leg (12) being fixed to the end plate (102); The second fixing bracket (4) comprises a second supporting plate (41) and two second supporting legs (42) arranged at intervals, the second supporting plate (41) being arranged between the two second supporting legs (42) and connected to one end of the second supporting leg (42), and the other end of the second supporting leg (42) being fixed to the first supporting plate (11).

4. The FPC assembly according to claim 3, characterized in that: The top surface of the first connector (21) abuts against the bottom surface of the first support plate (11).

5. The FPC assembly according to claim 3, characterized in that: The second connector (31) is arranged on the top surface of the first support plate (11), and the top surface of the second connector (31) abuts against the bottom surface of the second support plate (41).

6. The FPC assembly according to claim 2, characterized in that: The FPC assembly further comprises a connecting piece, the first fixing bracket (1) and the second fixing bracket (4) are respectively provided with a first connecting hole (13) and a second connecting hole (43), the end plate (102) is provided with a mounting portion, the connecting piece passes through the first connecting hole (13) and the second connecting hole (43) and is fixedly connected to the mounting portion.

7. The FPC assembly according to claim 6, characterized in that: The connecting piece is a bolt or a screw, and the mounting portion is a threaded hole.

8. The FPC assembly according to claim 1, characterized in that: An epoxy board is provided between the first connector (21) and the end plate (102).

9. A battery module (100), characterized in that: The invention comprises a steel strip and the FPC assembly according to any one of claims 1 to 8.

10. A battery pack, characterized in that: It comprises a lower tray, an upper cover and the battery module (100) according to claim 9.

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