Connecting components and conductive terminals thereof

Abstract

The present invention provides a connection component and a conductive terminal thereof, the connection component is used to electrically connect between a battery pack and a battery management system, and includes a circuit board, a conductive terminal, a wire and a connector, the conductive terminal is connected to one end of the circuit board to electrically connect to a plurality of battery cells in a battery pack respectively, the wire is connected to the other end of the circuit board, and is electrically connected to the conductive terminal through the circuit board, each conductive terminal includes a fixed portion, a contact portion electrically connected to the corresponding battery cell, and a connecting portion connecting the fixed portion to the contact portion, the fixed portion has a base electrically connected to the circuit board and a fixed foot bent and extended from the base, the connector is connected to the other end of the plurality of wires to connect to the battery management system, and the connecting portion is arranged in a curved shape to be elastically connected between the base and the contact portion. The connection component and the conductive terminal of the present invention can stably collect signals.

Description

Technical Field

[0001] The invention relates to a connection component and a conductive terminal thereof. Background Art

[0002] As a new energy vehicle, electric vehicles have become the direction of development of the automobile industry. Among them, the battery pack is an important energy source for electric vehicles, and monitoring the various performance of the battery pack is particularly important. Electric vehicles are equipped with a battery management system that monitors the safe operation of the battery, which is mainly used to monitor the battery cell voltage, battery cell temperature, energy balance, thermal management, battery pack total voltage, battery pack total current, data analysis, voice alarm, etc. of the battery pack; accordingly, it is necessary to collect relevant data of various functions, and at this time, a large number of connectors and transmission lines are required for relevant data collection and transmission, which leads to all the space in the battery pack being occupied by transmission lines, etc. In this way, not only the volume and weight of the battery pack increase, but also the wiring is more troublesome, the safety performance is lower, and the energy consumption and cost also increase accordingly.

[0003] The conductive terminals of traditional connection components are electrically connected to the battery cells of the battery pack. However, the battery cells will have a certain tolerance when expanding and contracting during the charging and discharging process or due to temperature, and will also be subject to a certain impact force during vibration, which will make signal acquisition unstable and shorten the service life.

[0004] In view of this, it is necessary to improve the existing connection components and conductive terminals thereof to solve the above problems. Summary of the invention

[0005] The object of the present invention is to provide a connection component and a conductive terminal thereof capable of stably collecting signals.

[0006] To achieve the above-mentioned purpose of the invention, the present invention provides a connection component for electrically connecting a battery pack and a battery management system, and includes a circuit board, a plurality of conductive terminals, a plurality of wires and a connector, wherein the conductive terminal is connected to one end of the circuit board to be electrically connected to a plurality of battery cells in a battery pack respectively, the wire is connected to the other end of the circuit board, and is electrically connected to the conductive terminal through the circuit board, each of the conductive terminals includes a fixed portion, a contact portion electrically connected to the corresponding battery cell, and a connecting portion connecting the fixed portion to the contact portion, the fixed portion has a base electrically connected to the circuit board and a fixed foot bent and extended from the base, the connector is connected to the other end of the plurality of conductive wires to be connected to the battery management system, and the connecting portion is bent to be elastically connected between the base and the contact portion.

[0007] As a further improvement of the present invention, the connecting portion includes at least one connecting arm, each of the connecting arms has a first end connected to the base, a second end connected to the contact portion, and at least one bending portion located between the first end and the second end.

[0008] As a further improvement of the present invention, each of the connecting arms has a flat plate portion extending from the base along a first direction and a bent portion formed by bending and extending from the flat plate portion, and the first end is an end of the flat plate portion connected to the base.

[0009] As a further improvement of the present invention, the flat plate portion further has a third end arranged opposite to the first end, and the flat plate portion extends obliquely so that the distance from the third end to the circuit board is greater than the distance from the first end to the circuit board.

[0010] As a further improvement of the present invention, the bending portion includes a first arc-shaped portion formed by bending from the third end and a second arc-shaped portion formed by bending and extending from the first arc-shaped portion in the opposite direction.

[0011] As a further improvement of the present invention, the contact portion and the base are located in different planes, the first arc portion and the second arc portion are arranged along the second direction so that the third end and the second end are spaced apart along the second direction, and the base is parallel to the contact portion and spaced apart along the second direction.

[0012] As a further improvement of the present invention, the opening of the first arc-shaped portion faces the fixing portion, and the opening direction of the second arc-shaped portion is opposite to the opening direction of the first arc-shaped portion.

[0013] As a further improvement of the present invention, the connecting portion has a plurality of connecting arms arranged side by side along a third direction, and the third direction is perpendicular to the first direction.

[0014] As a further improvement of the present invention, each of the conductive terminals further comprises a soldering portion soldered to the circuit board, wherein the soldering portion is formed by bending and extending from an end of the fixing portion away from the contact portion.

[0015] In order to achieve the above-mentioned purpose of the invention, the present invention also provides a conductive terminal, which includes a fixing portion, a contact portion for electrically connecting to a battery cell in a battery pack, and a connecting portion connecting the fixing portion and the contact portion, the fixing portion having a base for electrically connecting to a circuit board and a fixing foot extending and bending from the base, the connecting portion being arranged in a curved shape to be elastically connected between the base and the contact portion.

[0016] Beneficial effects of the present invention: The connecting component and the conductive terminal of the present invention are arranged in a curved shape to elastically connect to the connecting portion between the base and the contact portion to absorb the tolerance generated when the battery core expands or contracts and provide a buffering effect for the impact force generated by the electric vehicle during vibration, so that the connecting component can stably collect signals and have a longer service life. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a three-dimensional assembly schematic diagram of the connection component of the present invention.

[0018] Figure 2 yes Figure 1 A perspective exploded schematic diagram of the connection components shown.

[0019] Figure 3 yes Figure 1 A perspective view of conductive terminals of a connecting assembly mounted on a circuit board is shown.

[0020] Figure 4 yes Figure 3 A perspective view of a first embodiment of a conductive terminal is shown.

[0021] Figure 5 yes Figure 4 A three-dimensional view of the conductive terminal from another perspective.

[0022] Figure 6 yes Figure 4 A side view of the conductive terminal is shown.

[0023] Figure 7 yes Figure 4 A top view of the conductive terminal shown.

[0024] Figure 8 yes Figure 3 A perspective view of a second embodiment of a conductive terminal is shown. DETAILED DESCRIPTION

[0025] The present invention will be described in detail below in conjunction with the embodiments shown in the accompanying drawings. However, the embodiments do not limit the present invention, and any structural, methodological, or functional changes made by a person skilled in the art based on the embodiments are all within the protection scope of the present invention.

[0026] See also Figures 1 to 8 As shown, a preferred embodiment of the connection component 100 of the present invention is shown. The connection component 100 is used to electrically connect between a battery pack and a battery management system to collect information such as voltage or temperature on the battery pack.

[0027] The connecting assembly 100 includes a circuit board 1, a plurality of conductive terminals 2, a plurality of conductive wires 3 and a connector 4 for connecting to a battery management system. The plurality of conductive terminals 2 are connected to one end of the circuit board 1 to be electrically connected to a plurality of battery cells in a battery pack, respectively. The plurality of conductive wires 3 are connected to the other end of the circuit board 1 and are electrically connected to the conductive terminals 2 through the circuit board 1.

[0028] The connector 4 is connected to the other end of the plurality of wires 3 to be connected to the battery management system, that is, the connector 4 and the circuit board 1 are connected to the two opposite ends of the wires 3. The present invention mainly uses the circuit board 1 and the conductive terminal 2 to collect the relevant monitoring data of each battery cell in the battery pack, and transmits information through the circuit board 1, so that the wires 3 can be centrally connected to one end of the circuit board 1, and there is no need to connect them to each battery cell one by one, so that the connection is more convenient and easy to manage the wires; further, the connector 4 is uniformly connected to the other end of the wires 3, and connected to the battery management system through the first connector 4, thereby further setting all the wires 3 to the same length, and because the two ends of the wires 3 are connected at close positions, the wires 3 can be centrally processed as a whole, and flat wires or wiring harnesses can be used, so that there will be no problems of messy wires, large occupied volume, difficulty in distinguishing, and safety hazards.

[0029] Specifically, the circuit board 1 of the present invention is provided with fixing holes 11 for fixing the conductive terminals 2. The fixing holes 11 are dispersedly arranged at one end of the circuit board 1 to facilitate the connection between the conductive terminals 2 and the battery cells. Preferably, the circuit board 1 is also provided with positioning holes 14 for positioning with the battery pack to enhance the fixing effect of the connection assembly 100 of the present invention and the battery pack.

[0030] In addition, the circuit board 1 is provided with a plurality of welding holes 12, and the welding holes 12 are arranged in groups with the corresponding fixing holes 11. Taking the illustrated embodiment as an example, one welding hole 12 and its two adjacent fixing holes 11 form a group to be connected to the same conductive terminal 2.

[0031] A plurality of concentrated gold fingers 13 are disposed at the other end of the circuit board 1 , that is, the gold fingers 13 and the fixing holes 11 are disposed at two ends of the circuit board 1 opposite to each other.

[0032] Please refer to Figures 3 to 8 As shown, each of the conductive terminals 2 includes a fixing portion 21 , a contact portion 22 electrically connected to a corresponding battery cell in the battery pack, and a connecting portion connecting the fixing portion 21 and the contact portion 22 , and the contact portion 22 extends outside the corresponding circuit board 1 .

[0033] In this embodiment, for the convenience of description, the conductive terminal 2 will be described as follows. Figure 4 The X direction shown in the figure is regarded as the first direction, the Y direction is regarded as the second direction, and the Z direction is regarded as the third direction for explanation.

[0034] The fixing portion 21 has a base 211 electrically connected to the circuit board 1 and a fixing foot 212 bent and extended from the base 211. The connecting portion is bent to be elastically connected between the base 211 and the contact portion 22, thereby absorbing the tolerance generated when the battery core expands or contracts and providing a buffering effect for the impact force generated by the electric vehicle during vibration. In this way, the connecting component 100 can stably collect signals.

[0035] In a preferred embodiment of the present invention, the base 211 is in the shape of a flat plate so as to be attached to the circuit board 1, and a plurality of the fixing legs 212 are formed by bending from both sides of the base 211 in a third direction. The fixing legs 212 on each side are paired and spaced apart in a harpoon shape, thereby achieving a secure connection with the fixing hole 11.

[0036] Specifically, each of the fixing legs 212 has a guide surface 2121 disposed near its free end along the second direction, a supporting portion 2122 located between the guide surface 2121 and the base 211 along the second direction, and a straight portion 2123 connecting the supporting portion 2122 and the guide surface 2121. When the conductive terminal 2 is mounted on the circuit board 1, the fixing legs 212 are inserted into and passed through the fixing holes 11 until the circuit board 1 is sandwiched between the supporting portion 2122 and the base 211, so that the fixing legs 212 are fixed to the circuit board 1.

[0037] In the embodiment of the present invention, the contact portion 22 is in the shape of a plate, and the base 211 and the contact portion 22 of the same conductive terminal 2 are located in different planes. Specifically, the contact portion 22 is designed as a sunken plate to facilitate connection or contact with the battery cell; in other embodiments of the present invention, the base 211 may also be arranged coplanar with the contact portion 22, or, in the second direction, the contact portion 22 is located on the upper side of the base 211.

[0038] The connecting portion includes at least one connecting arm 23 , each of the connecting arms 23 having a first end 23 a connected to the base 211 , a second end 23 b connected to the contact portion 22 , and at least one bending portion 232 between the first end and the second end.

[0039] Furthermore, each of the connecting arms 23 has a flat portion 231 extending from the base 211 along the first direction and a bent portion 232 extending from the flat portion 231, and the first end 23a is an end of the flat portion 231 connected to the base 211. In this embodiment, the width of each of the connecting arms 23 in the third direction remains consistent, that is, the flat portion 231 and the bent portion 232 of the same connecting arm 23 have the same width in the third direction.

[0040] The flat plate portion 231 also has a third end 23c arranged opposite to the first end 23a, and the flat plate portion 231 extends obliquely so that the distance between the third end 23c and the circuit board 1 is greater than the distance between the first end 23a and the circuit board 1. Specifically, in this embodiment, the flat plate portion 231 extends from the base 211 along the first direction and also along the second direction, thereby achieving an oblique extension, and the angle formed by the flat plate portion 231 and the base 211 is an obtuse angle.

[0041] In a preferred embodiment of the present invention, the bending portion 232 includes a first arc-shaped portion 2321 formed by bending from the third end 23c and a second arc-shaped portion 2322 formed by bending and extending from the first arc-shaped portion 2321 in the opposite direction. In this embodiment, the bending portion 232 also has a bridge portion 2323 connecting the first arc-shaped portion 2321 and the second arc-shaped portion 2322, and the bridge portion 2323 is arranged in parallel or substantially in parallel with the flat plate portion 231; in other embodiments, the bending portion 232 may also be composed of a plurality of arc-shaped portions connected by smooth transitions.

[0042] The contact portion 22 and the base 211 are located in different planes, the first arc portion 2321 and the second arc portion 2322 are arranged along the second direction so that the third end 23c and the second end 23b are spaced apart along the second direction, and the base 211 is parallel to the contact portion 22 and spaced apart along the second direction.

[0043] The opening of the first arc-shaped portion 2321 faces the fixing portion 21 , and the opening direction of the second arc-shaped portion 2322 is opposite to the opening direction of the first arc-shaped portion 2321 .

[0044] Further preferably, the length of the flat portion 231 in the first direction is greater than the length of the bent portion 232 in the first direction, the second arc portion 2322 and the flat portion 231 are located on both sides of the base 211 in the second direction, and the projection of the second arc portion 2322 on the plane where the contact portion 22 is located is located inside the projection of the flat portion 231 on the plane, and in addition, the projection of the second arc portion 2322 on the plane where the contact portion 22 is located does not overlap with the projection of the first arc portion 2322 on the plane.

[0045] Furthermore, if Figure 4 As shown, in the first embodiment of the present invention, the connecting portion has a plurality of connecting arms 23 arranged side by side along a third direction, the third direction is perpendicular to the first direction, two adjacent connecting arms 23 are spaced a certain distance apart along the third direction, and preferably, the distance between two adjacent connecting arms 23 in the third direction is less than the width of each connecting arm 23 in the third direction. Figure 8 As shown, in the second embodiment of the present invention, the connecting portion may also have only one connecting arm 23, and the connecting arm 23 is a curved sheet structure. In other embodiments of the present invention, the connecting portion may also be composed of two, four or more connecting arms 23 arranged side by side.

[0046] In addition, each of the conductive terminals 3 also has a soldering portion 24 soldered to the circuit board 1, and the soldering portion 24 is formed by bending and extending from one end of the fixing portion 21 away from the contact portion 22. In the present embodiment, the soldering portion 24 is bent from the fixing portion 21 along the second direction, and the soldering portion 24 is parallel to the second direction, and the soldering portion 24 is connected to the middle position of the fixing portion 21 in the third direction.

[0047] In the embodiment of the present invention, the connecting component 100 has two circuit boards 1 and two groups of conductive terminals 2 respectively connected to the two circuit boards 1, and the wires 3 include two groups respectively connected to two different circuit boards 1, wherein one end of one group of wires 3 is connected to one circuit board 1, and the other end oppositely arranged is connected to the connector 4, and then connected to the positive terminal of the battery pack through a corresponding group of conductive terminals 2; one end of the other group of wires 3 is connected to another circuit board 1, and the other end oppositely arranged is also connected to the connector 4, and connected to the negative terminal of the battery pack through another corresponding group of conductive terminals 2; the connector 4 is connected to the other ends of the two groups of wires 3 to connect to the battery management system.

[0048] Each group of the wires 3 are centrally arranged and soldered one by one with the gold fingers 13 of the corresponding circuit board 1. The circuit board 1 is provided with a wire circuit (not shown) electrically connecting the terminals 2 and the gold fingers 13. Preferably, the connection assembly 100 further includes a protection block 5 injection-molded at the connection between the wires 3 and the circuit board 1, and an opening 15 is provided on the circuit board 1 for firmly fixing the protection block 5 during injection molding.

[0049] In addition, the connection component 100 further includes a thermal sensor 6 disposed on the circuit board 1 , and a detection end of the thermal sensor 6 extends out of the circuit board 1 to detect the battery pack.

[0050] In the above-mentioned design of the present invention, a set of circuit boards 1, conductive terminals 2 and wires 3 can be connected to one end of a battery cell to collect temperature information of the battery cell.

[0051] The connection component 100 of the present invention uses a circuit board 1 and a conductive terminal 2 to collect relevant monitoring data of each battery cell in the battery pack, and transmits information through the circuit board 1, so that the wires 3 can be connected centrally at one end of the circuit board 1, without having to be connected to each battery cell one by one, which makes the connection more convenient and easy to manage. In addition, a connector is connected to the other end of the wire 3, and connected to the battery management system through the connector, thereby further setting all the wires to the same length, and because both ends of the wires are connected at close positions, the wires can be processed centrally as a whole, such as using flat wires or wiring harnesses, and thus there will be no problems of messy wires, large volume occupied, difficulty in distinguishing, and safety hazards.

[0052] In addition, the connection component 100 of the present invention is bent to elastically connect the connection portion between the base 211 and the contact portion 22 to absorb the tolerance generated when the battery core expands or contracts and provide a buffering effect for the impact force generated by the electric vehicle during vibration. In this way, the connection component 100 can stably collect signals and have a longer service life.

[0053] The above embodiments are only used to illustrate the technical solution of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solution of the present invention may be modified or replaced by equivalents without departing from the spirit and scope of the technical solution of the present invention.

Claims

1. A connection assembly for electrically connecting a battery pack and a battery management system, and comprising a circuit board, a plurality of conductive terminals, a plurality of wires and a connector, wherein the conductive terminal is connected to one end of the circuit board to be electrically connected to a plurality of battery cells in a battery pack respectively, the wire is connected to the other end of the circuit board and is electrically connected to the conductive terminal through the circuit board, each of the conductive terminals comprises a fixing portion, a contact portion electrically connected to a corresponding battery cell and a connecting portion connecting the fixing portion to the contact portion, the fixing portion comprises a base portion electrically connected to the circuit board and a fixing foot bent and extended from the base portion, the connector is connected to the other end of the plurality of wires to be connected to the battery management system, characterized in that: The connecting portion is arranged in a curved shape to be elastically connected between the base and the contact portion, and the connecting portion includes a plurality of connecting arms arranged side by side along a third direction, each of the connecting arms has a first end connected to the base, a second end connected to the contact portion, and at least one bending portion located between the first end and the second end, and each of the connecting arms has a flat plate portion extending from the base along a first direction and a bending portion formed by bending and extending from the flat plate portion, the first direction is perpendicular to the third direction, the first end is an end of the flat plate portion connected to the base, and the flat plate portion also has a third end arranged opposite to the first end, the flat plate portion extends obliquely so that the distance from its third end to the circuit board is greater than the distance from the first end to the circuit board, the third end and the second end are spaced apart along the second direction, and the bending portion connects the third end to the second end.

2. The connection assembly according to claim 1, characterized in that: The length of the flat plate portion in the first direction is greater than the length of the bent portion in the first direction.

3. The connection assembly according to claim 2, characterized in that: The bending portion includes a first arc portion formed by bending from the third end and a second arc portion formed by bending and extending from the first arc portion in the opposite direction.

4. The connection assembly according to claim 3, characterized in that: The contact portion and the base portion are located in different planes, the first arc portion and the second arc portion are arranged along a second direction so that the third end and the second end are spaced apart along the second direction, and the base portion is parallel to the contact portion and spaced apart along the second direction.

5. The connection assembly according to claim 4, characterized in that: The opening of the first arc-shaped portion faces the fixing portion, and the opening direction of the second arc-shaped portion is opposite to the opening direction of the first arc-shaped portion.

6. The connection assembly according to claim 1, characterized in that: There is a distance between two adjacent connecting arms along the third direction, and the distance between two adjacent connecting arms in the third direction is smaller than the width of each connecting arm in the third direction.

7. The connection assembly according to claim 1, characterized in that: Each of the conductive terminals further comprises a soldering portion soldered to the circuit board, wherein the soldering portion is formed by bending and extending from an end of the fixing portion away from the contact portion.

8. A conductive terminal, comprising a fixing portion, a contact portion for electrically connecting to a battery cell in a battery pack, and a connecting portion connecting the fixing portion to the contact portion, wherein the fixing portion has a base portion for electrically connecting to a circuit board and a fixing leg extending from the base portion, characterized in that: The connecting portion is arranged in a curved shape to be elastically connected between the base and the contact portion, and the connecting portion includes a plurality of connecting arms arranged side by side along a third direction, each of the connecting arms has a first end connected to the base, a second end connected to the contact portion, and at least one bending portion located between the first end and the second end, and each of the connecting arms has a flat plate portion extending from the base along a first direction and a bending portion formed by bending and extending from the flat plate portion, the first direction is perpendicular to the third direction, the first end is an end of the flat plate portion connected to the base, and the flat plate portion also has a third end arranged opposite to the first end, the flat plate portion extends obliquely so that the distance from its third end to the circuit board is greater than the distance from the first end to the circuit board, the third end and the second end are spaced apart along the second direction, and the bending portion connects the third end to the second end.

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