Battery flexible circuit board mounting structure and battery pack

Abstract

The utility model provides a battery flexible circuit board mounting structure and a battery pack, the battery flexible circuit board mounting structure is used for pasting a flexible circuit board on the outer surface of a copper bar, the mounting structure comprises two connecting lugs and a connecting piece, the connecting lugs are separately arranged and kept at two sides of the width direction of the copper bar; the number of the connecting pieces is two, and the connecting pieces are arranged corresponding to the connecting lugs; the connecting pieces penetrate through the flexible circuit board from the outer surface of the flexible circuit board and then are fixed to the corresponding connecting lugs. According to the utility model, the installation stability of the flexible circuit board is improved so as to improve the use quality of a vehicle.

Description

Technical Field

[0001] The utility model relates to the technical field of flexible circuit board installation, in particular to a battery flexible circuit board installation structure and a battery pack. Background Art

[0002] Flexible circuit board, commonly known as FPC (Flexible Printed Circuit Board) in the industry, is a printed circuit made of flexible insulating substrate. It can provide excellent electrical performance and meet the design requirements of smaller and higher density installation; because it can be bent, rolled and folded freely, it can be arranged arbitrarily according to the spatial layout requirements, so as to achieve the integration of component assembly and wire connection.

[0003] In the automotive field, FPC is widely used in automotive electronic systems, especially in battery BMS, vehicle lighting, door control systems, camera modules and other parts. The application value of FPC in battery BMS and vehicle camera modules is the highest. Previously, new energy batteries mostly used traditional copper wire harness solutions, which required many wire harnesses to cooperate, occupied a lot of space, and required manual fixation of the port on the battery pack, with a low degree of automation. Due to the characteristics of FPC's high integration, ultra-thin thickness and ultra-softness, it has outstanding advantages in safety, lightweight, and regular layout.

[0004] In the related art, when fixing the flexible circuit board and the copper busbar, double-sided tape is often used to stick the flexible circuit board to the outer surface of the copper busbar. If the flexible circuit board is long or the flexible circuit board and the copper busbar are fixed for a long time, the flexible circuit board and the copper busbar may be easily separated, and the flexible circuit board may not be firmly fixed, affecting the quality of vehicle use. Utility Model Content

[0005] In view of this, the utility model aims to provide a battery flexible circuit board installation structure to improve the installation stability of the flexible circuit board and thus improve the quality of vehicle use.

[0006] To achieve the above object, the technical solution of the utility model is implemented as follows: a battery flexible circuit board mounting structure, used to attach the flexible circuit board to the outer surface of the copper bus, the mounting structure includes:

[0007] Connecting ears, the connecting ears are arranged to be arranged and maintained at two sides of the copper bar in the width direction;

[0008] The connecting piece is configured to have two connecting pieces corresponding to each connecting ear; each connecting piece passes through the flexible circuit board from the outer surface of the flexible circuit board and is fixed on the corresponding connecting ear.

[0009] Furthermore, the connecting ear and the copper busbar are connected by bundling, bonding or clamping.

[0010] Furthermore, the connecting ear is constructed into a "convex" shape consisting of a base and a head, the base is abutted against the side surface of the copper busbar in the width direction, and the head forms a connection with the connecting piece.

[0011] Furthermore, on the two shoulders of the connecting ear, there are respectively provided binding pieces wrapped around the shoulders and the copper busbar.

[0012] Furthermore, the binding piece is adhesive tape.

[0013] Furthermore, the connecting piece is constructed to be plugged into and snap-fit ​​with the connecting ear.

[0014] Furthermore, the connecting member includes a bolt body and an elastic protrusion formed in the circumferential direction of the tail end of the bolt body;

[0015] A through hole is formed on the connecting ear to allow the tail section of the bolt body to pass through;

[0016] When the tail section of the bolt body passes through the through hole, the elastic protrusion can be radially compressed to pass through the through hole.

[0017] Furthermore, the elastic protrusion includes a plurality of spring leaves, each of which is extended along the axial direction of the bolt body, and the distribution of the spring leaves is maintained at intervals in the circumferential direction of the tail section of the bolt body.

[0018] Furthermore, the contact surface between the plug body and the outer surface of the flexible circuit board is a flat surface.

[0019] Furthermore, the copper busbar includes a straight section and a bent section, and the connecting ear is arranged on the bent section;

[0020] When the connecting member is connected to the connecting ear, the connecting member is restricted above the inner surface of the straight section due to the bent section.

[0021] Compared with the prior art, the utility model has the following advantages:

[0022] The battery flexible circuit board installation structure described in the utility model is provided with separately arranged connecting ears and connecting pieces. Compared with the existing double-sided adhesive fixing, the problem of the flexible circuit board and the copper busbar being separated due to the failure of the double-sided adhesive caused by the flexible circuit board being too long or being used for too long will not occur; and when connecting the flexible circuit board and the copper busbar, it is only necessary to make the connecting piece pass through the flexible circuit board and then connect it to the connecting ear fixed on the copper busbar; the operation is simple and shortens the production time, and the fixing is more reliable, which improves the quality of vehicle use. The connecting ears and connecting pieces located on both sides of the copper busbar in the width direction provide multiple guarantees for the connection between the flexible circuit board and the copper busbar, and make the flexible circuit board close to the copper busbar; the stability of the flexible circuit board after being connected to the copper busbar is improved.

[0023] Secondly, the connecting ear and the copper busbar are connected by bundling, bonding or clamping, so that the connecting ear and the copper busbar can be connected without secondary processing of the copper busbar; the connection process does not require welding and other operations, which is convenient for installation and replacement, and ensures the stability of the copper busbar. When the shoulder of the connecting ear is wrapped around and tied to the copper busbar using a binding piece, the shoulders on both sides of the width direction of the copper busbar and on the same side of the head can be bound at the same time, shortening the time required for binding. The binding piece uses adhesive tape, which can prevent the connecting ear from moving along the copper busbar while sticking the adhesive tape on the copper busbar and the connecting ear, thereby preventing the connecting ear from moving along the copper busbar and preventing the binding from failing due to the movement of the binding piece. The effect of improving the stability of the connection is achieved.

[0024] In addition, the connection between the connector and the connecting ear is snap-fitted, which is easier to disassemble and assemble than an adhesive connection, and can ensure that the flexible circuit board will not be damaged by heat compared to heat welding or hot riveting, and the snap-fit ​​is more secure. The bolt body and the elastic protrusion are inserted into the through hole, and the elastic protrusion is clamped in the through hole under the elastic protrusion's own rebound ability, so that the connector and the connecting ear are snap-fitted. The contact surface between the bolt body and the outer surface of the flexible circuit board is a plane, which increases the contact area between the bolt body and the flexible circuit board; improves the stability of the flexible circuit board after being fixed, and thus improves the quality of use of the vehicle.

[0025] By providing a straight section and a bent section, the connector is confined above the straight section. When the copper busbar is assembled on the battery module, the connecting ear is confined in the space formed by the bent section and the battery module, which does not affect the normal assembly of the copper busbar and prevents the connecting ear from moving.

[0026] The utility model also provides a battery pack, comprising the battery flexible circuit board installation structure as described above.

[0027] The battery pack of the utility model improves the connection stability between the copper bus and the flexible circuit board by assembling the battery flexible circuit board mounting structure as described above, thereby making the production of the battery pack more convenient, the wiring harness integration higher, and the battery pack safer and more stable to use, thereby improving the use quality of the vehicle. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] The accompanying drawings constituting a part of the present invention 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 improper limitation on the present invention. In the accompanying drawings:

[0029] Figure 1 This is a schematic diagram of the overall structure of the first embodiment of the utility model;

[0030] Figure 2 The first embodiment of the utility model is a schematic diagram showing the structure of the bending section and the straight section of the copper bar;

[0031] Figure 3 The first embodiment of the present utility model is a schematic diagram showing a binding member;

[0032] Figure 4 The first embodiment of the present utility model is a schematic diagram showing a bolt head;

[0033] Figure 5 The first embodiment of the present utility model is a schematic diagram showing that the connecting piece is engaged in the connecting ear;

[0034] Figure 6 The first embodiment of the present utility model is a schematic diagram showing the connection relationship between the bolt body and the elastic protrusion.

[0035] Description of reference numerals: 1. connecting ear;

[0036] 101, base; 102, head; 1021, through hole; 103, shoulder;

[0037] 2. Connectors;

[0038] 201, bolt body; 2011, bolt column; 2012, bolt head; 202, elastic protrusion; 2021, spring; 2021a, elastic retaining portion; 2021b, elastic guide portion;

[0039] 3. Flexible circuit board;

[0040] 4. Copper busbar;

[0041] 401, straight section; 402, bending section;

[0042] 5. Bundling parts. DETAILED DESCRIPTION

[0043] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features in the embodiments can be combined with each other.

[0044] In the description of the present invention, it should be noted that if there are terms such as "upper", "lower", "inner", "outer" and the like indicating orientation or positional relationship, they are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, if there are terms such as "first" and "second", they are also used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0045] In addition, in the description of the present invention, unless otherwise clearly defined, the terms "installation", "connection", "connection" and "connector" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood in combination with specific circumstances.

[0046] The present invention will be described in detail below with reference to the accompanying drawings and in combination with embodiments.

[0047] Embodiment 1

[0048] This embodiment relates to a battery flexible circuit board installation structure to solve the problem of unreliable connection between the existing flexible circuit board 3 and the copper bus 4, thereby improving the use quality of the vehicle.

[0049] In terms of overall structure, the battery flexible circuit board mounting structure of this embodiment is used to attach the flexible circuit board 3 to the outer surface of the copper bus 4. The mounting structure includes:

[0050] Connecting ears 1, which are arranged to be arranged and maintained at two ends of the copper bar 4 in the width direction;

[0051] The connector 2 is provided in pairs corresponding to each connecting ear 1 ; each connector 2 passes through the flexible circuit board 3 from the outer surface of the flexible circuit board 3 and is fixed on the corresponding connecting ear 1 .

[0052] As configured above, the flexible circuit board mounting structure of this embodiment is provided with a separately arranged connecting ear 1 and a connecting piece 2. Compared with the existing double-sided adhesive fixing, the problem of the flexible circuit board 3 and the copper bus 4 being separated due to the failure of the double-sided adhesive caused by the flexible circuit board 3 being too long or the double-sided adhesive being used for too long will not occur. And when connecting the flexible circuit board 3 and the copper bus 4, it is only necessary to make the connecting piece 2 penetrate the flexible circuit board 3 and then connect it to the connecting ear 1 fixed on the copper bus 4; it is easy to operate, shortens the production time, and is more firmly fixed, which improves the quality of vehicle use. The connecting ears 1 and the connecting piece 2 located on both sides of the width direction of the copper bus 4 provide multiple guarantees for the connection between the flexible circuit board 3 and the copper bus 4, and make the flexible circuit board 3 close to the copper bus 4; it improves the stability of the flexible circuit board 3 after being connected to the copper bus 4.

[0053] Based on the overall introduction above, the flexible circuit board 3 can be a flexible circuit board 3 at any position. There is a carrier on one side of the flexible circuit board 3 to fix the connecting ear 1 on the carrier, that is, after the connecting piece 2 penetrates the flexible circuit board 3 and fixes the connecting ear 1 fixed on the carrier, the flexible circuit board 3 can be attached to one side of the carrier; more preferably, the width of the carrier is not greater than the width of the flexible circuit board 3; that is, both side walls of the carrier in the width direction can be connected with the connecting ear 1. In this embodiment, the copper bus 4 located in the battery pack is taken as an example of a carrier; refer to Figures 1 to 2 Specifically, the copper busbar 4 includes a straight section 401 and a bent section 402, and the connecting ear 1 is arranged on the bent section 402; when the connecting member 2 is connected to the connecting ear 1, the connecting member 2 is restricted above the inner surface of the straight section 401 due to the bent section 402. The connecting ear 1 and the connecting member 2 do not protrude from the inner surface of the straight section 401 of the copper busbar 4, so that the connecting member 2 is restricted above the straight section 401. When the copper busbar 4 is assembled in the battery module, the connecting ear 1 is restricted in the space formed by the bent section 402 and the battery module, which has the effect of not affecting the normal assembly of the copper busbar 4 and preventing the connecting ear 1 from moving.

[0054] In order to achieve a fast and reliable connection between the connecting ear 1 and the copper bus 4 without performing secondary processing on the copper bus 4; Figures 1 to 6 , the connection ear 1 and the copper busbar 4 are connected by binding, bonding or clamping. Specifically, the connection ear 1 is constructed in a "convex" shape consisting of a base 101 and a head 102, the base 101 is attached to the side of the copper busbar 4 in the width direction, and the head 102 is connected to the connection piece 2; on the two shoulders 103 of the connection ear 1, there are respectively provided binding pieces 5 wrapped around the shoulders 103 and the copper busbar 4.

[0055] In this embodiment, the base 101 is constructed as a rectangular plate-like structure, and the head 102 is constructed as a rectangular plate-like structure with a chamfered top and is vertically fixedly connected to the base 101; the base 101 and the head 102 can be fixedly connected by welding, or by integral molding or cutting. The base 101 located on both sides of the head 102 forms shoulders 103. The binding member 5 is wrapped around the shoulders 103 and the copper bus 4 to fix the base 101 against the copper bus 4. Because there are shoulders 103 on both sides of the head 102, the binding member 5 is located on both sides of the head 102, which can prevent the binding member 5 from moving along the base 101, and a connecting member 2 has two fixed points, which can also prevent the connecting member 2 from rotating on the copper bus 4.

[0056] The connection ear 1 and the copper bar 4 are connected by binding, which does not require welding and other operations, is easy to install and replace, and ensures the stability of the copper bar 4. When the shoulder 103 of the connecting ear 1 is wrapped around and bound to the copper bar 4 using the binding member 5, the shoulders 103 located on both sides of the copper bar 4 in the width direction and on the same side of the head 102 can be bound at the same time, which shortens the time required for binding.

[0057] Based on the purpose of tying the connector 2 to the copper bar 4, in order to further increase the connection stability and convenience between the connecting ear 1 and the copper bar 4, as an implementable method, the binding member 5 is adhesive tape. While realizing that the connecting ear 1 is tightly tied to the copper bar 4, the adhesive tape is pasted on the copper bar 4 and the connecting ear 1, which can prevent the connecting ear 1 from moving along the copper bar 4, and can prevent the binding failure caused by the movement of the binding member 5. At the same time, the adhesive tape can achieve a self-adhesive connection between the two ends, without the need for operations such as knotting, and is simple to operate and easy to obtain. Based on the above ideas, as other optional implementations, the binding member 5 can also use a nylon cable tie or a Velcro cable tie.

[0058] In order to facilitate the connection between the connecting piece 2 and the connecting ear 1, refer to Figures 3 to 6 The connector 2 is configured to be snap-fitted with the connecting ear 1 after being plugged in; the snap-fitting connection between the connector 2 and the connecting ear 1 is easier to disassemble and assemble than an adhesive connection, and can ensure that the flexible circuit board 3 will not be damaged by heat compared to thermal welding or thermal riveting, and the snap-fitting is more reliable. Specifically, the connector 2 includes a bolt body 201, and an elastic protrusion 202 formed in the circumferential direction of the tail end of the bolt body 201; a through hole 1021 is formed on the connecting ear 1 to allow the tail section of the bolt body 201 to pass through; when the tail section of the bolt body 201 passes through the through hole 1021, the elastic protrusion 202 can be radially compressed to pass through the through hole 1021. The bolt body 201 includes a bolt column 2011 and a bolt head 2012. The contact surface between the bolt body 201 and the outer surface of the flexible circuit board 3 is a flat surface. It can be understood that after the bolt body 201 penetrates the flexible circuit board 3, the contact surface between the bolt head 2012 and the outer surface of the flexible circuit board 3 is a flat surface.

[0059] The elastic protrusion 202 is formed around the bolt 2011; and the through hole 1021 is opened in the head 102 of the connecting ear 1. The bolt 2011 and the elastic protrusion 202 are inserted into the through hole 1021, and the elastic protrusion 202 is clamped in the through hole 1021 under the resilience of the elastic protrusion 202 itself, so as to realize the clamping connection between the connector 2 and the connecting ear 1. The contact surface between the bolt body 201 and the outer surface of the flexible circuit board 3 is a plane, which increases the contact area between the bolt body 201 and the flexible circuit board 3, making it difficult for the flexible circuit board 3 to tear at the opening; improving the stability of the flexible circuit board 3 after being fixed, thereby improving the use quality of the vehicle.

[0060] The elastic protrusion 202 can be made of rubber. The material used for the elastic protrusion 202 can be flexibly selected. The material can be compressed under force and automatically rebound under its own elastic properties when the external force disappears. Rubber has the advantages of moderate hardness, good fatigue resistance, and easy material acquisition.

[0061] In order to facilitate the radial compression of the elastic protrusion 202 through the through hole 1021, refer to Figures 5 to 6 The elastic protrusion 202 includes a plurality of springs 2021, each of which is arranged to extend along the axial direction of the bolt body 201, and the distribution of each of the springs 2021 is maintained in the circumferential direction of the tail section of the bolt body 201. In this embodiment, the springs 2021 are evenly distributed along the circumference of the bolt body 201. When the springs 2021 are compressed by external force, the uniform gaps between adjacent springs 2021 facilitate the deformation of the springs 2021. Moreover, the evenly distributed springs 2021 along the circumference of the bolt body 201 improve the stability of the springs 2021 after being clamped in the through hole 1021, so that it is not easy to separate from the through hole 1021.

[0062] In addition, in order to facilitate the insertion of the spring 2021 and the bolt body 201 into the through hole 1021, as a preferred implementation of this embodiment, the spring 2021 includes an elastic retaining portion 2021a and an elastic guiding portion 2021b; the elastic retaining portion 2021a gradually thickens from one end of the bolt column 2011 close to the bolt head 2012 to the other end, until the bolt column 2011 with the elastic retaining portion 2021a can be tightened and retained in the through hole 1021 after being inserted into the through hole 1021. The elastic guiding portion 2021b is smoothly connected with the elastic retaining portion 2021a to form an integral body, and the elastic guiding portion 2021b is located at the end of the bolt column 2011 away from the bolt head 2012, and the elastic guiding portion 2021b gradually becomes thinner and extends to the end surface of the bolt body 201. When the bolt body 201 and the spring leaf 2021 are inserted into the through hole 1021, the bolt body 201 is easily inserted into the through hole 1021 under the guiding action of the elastic guide part 2021b. Since the elastic guide part 2021b and the elastic retaining part 2021a are continuously and smoothly connected, when the bolt body 201 is pushed, the elastic retaining part 2021a is easily compressed. When the bolt head 2012 is pressed against the flexible circuit board 3, the elastic retaining part 2021a is pressed against the hole wall of the through hole 1021, completing the clamping connection between the connector 2 and the connecting ear 1.

[0063] When the battery flexible circuit board installation structure of this embodiment is used, a hole for the plug body 201 and the elastic protrusion 202 to pass through can be first opened in the blank space of the flexible circuit board 3; the connecting ear 1 is placed on the bending section 402 of the copper busbar 4, and the connecting ear 1 is fixed to the copper busbar 4 using the binding member 5; the flexible circuit board 3 is then attached to the outer surface of the copper busbar 4, and the preset hole of the flexible circuit board 3 is facing the through hole 1021. At this time, the plug body 201 is passed from the outer surface of the flexible circuit board 3 to the through hole 1021 until the plug head 2012 is pressed against the flexible circuit board 3 and the elastic protrusion 202 is tightened and maintained in the through hole 1021. The fixing of the flexible circuit board 3 and the copper busbar 4 is completed.

[0064] Embodiment 2

[0065] The present embodiment relates to a battery pack, including the battery flexible circuit board mounting structure as described above. The battery pack of the present embodiment is provided with the battery flexible circuit board mounting structure as described above to improve the connection stability between the copper bus 4 and the flexible circuit board 3, thereby making the production of the battery pack more convenient, the wiring harness integration higher, and the battery pack safer and more stable to use, thereby improving the quality of vehicle use.

[0066] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A battery flexible circuit board mounting structure, used to attach the flexible circuit board to the outer surface of the copper bus, characterized in that: The mounting structure includes: Connecting ears, the connecting ears are arranged to be arranged and maintained at two sides of the copper bar in the width direction; The connecting piece is configured to have two connecting pieces corresponding to each connecting ear; each connecting piece passes through the flexible circuit board from the outer surface of the flexible circuit board and is fixed on the corresponding connecting ear.

2. The battery flexible circuit board installation structure according to claim 1, characterized in that: The connecting ear and the copper busbar are connected by binding, bonding or clamping.

3. The battery flexible circuit board installation structure according to claim 1, characterized in that: The connecting ear is constructed in a "convex" shape consisting of a base and a head, the base is abutted against the side surface of the copper busbar in the width direction, and the head forms a connection with the connecting piece.

4. The battery flexible circuit board installation structure according to claim 3, characterized in that: Binding pieces wrapped around the shoulders and the copper busbar are respectively provided on the two shoulders of the connecting ear.

5. The battery flexible circuit board installation structure according to claim 1, characterized in that: The connecting piece is configured to be plugged into and snap-fit ​​with the connecting ear.

6. The battery flexible circuit board installation structure according to claim 1, characterized in that: The connecting member comprises a bolt body and an elastic protrusion formed in the circumferential direction of the tail end of the bolt body; A through hole is formed on the connecting ear to allow the tail section of the bolt body to pass through; When the tail section of the bolt body passes through the through hole, the elastic protrusion can be radially compressed to pass through the through hole.

7. The battery flexible circuit board installation structure according to claim 6, characterized in that: The elastic protrusion includes a plurality of spring leaves, each of which is extended along the axial direction of the bolt body, and the distribution of the spring leaves is maintained at intervals in the circumferential direction of the tail section of the bolt body.

8. The battery flexible circuit board installation structure according to claim 7, characterized in that: The contact surface between the plug body and the outer surface of the flexible circuit board is a flat surface.

9. The battery flexible circuit board mounting structure according to any one of claims 1 to 8, characterized in that: The copper busbar comprises a straight section and a bent section, and the connecting ear is arranged on the bent section; When the connecting member is connected to the connecting ear, the connecting member is restricted above the inner surface of the straight section due to the bent section.

10. A battery pack, characterized in that: The battery pack is provided with a battery flexible circuit board mounting structure as claimed in any one of claims 1 to 9.

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