Terminal assembly and battery pack
By designing through holes, inclined guide surfaces, and groove structures on the base plate of the terminal block, the problems of terminal block melting and air not being able to escape during welding are solved, achieving high-quality welding and good heat dissipation, and extending the service life of the battery pack.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- KEYWAY TECH (NANTONG) CO LTD
- Filing Date
- 2025-06-30
- Publication Date
- 2026-07-24
AI Technical Summary
In the prior art, during the soldering of terminal assemblies, the high temperature of the solder pot causes the terminal base to melt, resulting in poor soldering and preventing air from escaping, which affects the soldering quality.
Design a terminal assembly in which the base plate of the terminal block has a through hole and an inclined guide surface, the welding foot passes through the through hole, the guide surface extends inclinedly to separate the welding foot from the bottom surface, and the base plate has a groove to form an air-avoiding groove and an air-venting groove to ensure that air is smoothly discharged during welding.
It improved welding quality, reduced welding difficulty, enhanced the reliability of the connection between terminals and circuit boards and the heat dissipation effect, and extended the service life of the battery pack.
Smart Images
Figure CN224554517U_ABST
Abstract
Description
Technical Field
[0001] This application relates to the field of battery pack technology. Background Technology
[0002] In existing technology, a battery pack includes a circuit board and a terminal assembly mounted on the circuit board. The terminal assembly includes a terminal holder and terminals mounted on the terminal holder. Each terminal includes a body and a mating portion extending from the body and a soldering lead. The soldering lead is configured to be soldered to the circuit board. The terminal holder is typically made of plastic, and the terminals are typically made of metal. When the soldering leads of the terminals are soldered to the circuit board, wave soldering is usually used. The temperature of the wave soldering furnace is typically 265°-270°C, which is much higher than the melting point of plastic. Therefore, when the soldering leads are soldered to the circuit board, the area of the terminal holder near the soldering leads may melt. The molten plastic will flow downwards and stick to the circuit board, resulting in poor soldering. In addition, the terminal holder is in close contact with the circuit board, and air at the soldering position cannot be expelled during soldering, which also leads to poor soldering.
[0003] Therefore, it is necessary to provide a new terminal assembly and battery pack. Utility Model Content
[0004] This application provides a terminal assembly and battery pack with a longer lifespan and higher yield.
[0005] Specifically, this application provides a terminal assembly for a battery pack, including a terminal holder and a terminal group mounted on the terminal holder. The terminal group includes a first terminal. The terminal holder has a first terminal slot for mounting the first terminal. The first terminal includes a first body portion and a first mating portion and a first soldering foot extending from the first body portion. The first body portion is inserted into the first terminal slot. The first mating portion is configured to mate with a mating terminal. The first soldering foot is configured to be soldered to a circuit board. The terminal holder includes a base plate. The base plate has a first through hole. The first soldering foot passes through the first through hole. The base plate includes a bottom surface facing away from the first terminal slot and a guide surface extending obliquely from the bottom surface into the first through hole. The guide surface extends obliquely from the bottom surface toward the first soldering foot, such that the first soldering foot is spaced apart from the bottom surface.
[0006] Furthermore, the guide surface is an inclined surface or an arc surface.
[0007] Furthermore, the terminal group also includes a second terminal. The terminal holder has a second terminal slot for mounting the second terminal. The second terminal includes a second body portion and a second mating portion and a second soldering foot extending from the second body portion. The second body portion is inserted into the second terminal slot. The second mating portion is configured to mate with the mating terminal. The second soldering foot is configured to be soldered to the circuit board. The base plate has a second through hole through which the second soldering foot passes. The base plate has a groove formed by recessing upward from the bottom surface. The groove communicates with the second through hole. The groove includes a clearance groove and a venting groove. The clearance groove is arranged around the second soldering foot.
[0008] Furthermore, the terminal group includes two first terminals and two second terminals, with the two second terminals located between the two first terminals.
[0009] Furthermore, the base plate is provided with two grooves, each corresponding to one of the two second terminals.
[0010] Furthermore, the extension directions of the first mating portion and the second mating portion are defined as the first direction, and the extension directions of the first welding foot and the second welding foot are defined as the second direction, with the first direction being perpendicular to the second direction; the two first terminals and the two second terminals are arranged along a third direction, which is perpendicular to the first direction and the third direction is perpendicular to the second direction.
[0011] Furthermore, the exhaust groove extends along the first direction and penetrates the side of the base plate along the first direction.
[0012] Furthermore, the first body portion includes an exposed portion that is exposed outside the terminal block, and the exposed portion is disposed adjacent to the first soldering foot.
[0013] Furthermore, the terminal block includes a positioning post extending from the base plate, the positioning post being located on the side of the base plate opposite to the first terminal slot, the positioning post being configured to mate with the circuit board.
[0014] This application also provides a battery pack, including a housing, a cell module, a circuit board, and a terminal assembly as described in any of the above claims, wherein the cell module, the circuit board, and the terminal assembly are all installed inside the housing, and the terminal assembly is installed on the circuit board.
[0015] In this application, the terminal block includes a base plate with a first through hole. The first soldering pin of the first terminal passes through the first through hole. The base plate includes a bottom surface and a guide surface that extends obliquely from the bottom surface into the first through hole. The guide surface extends obliquely from the bottom surface toward the direction close to the first soldering pin. This design can improve the soldering yield between the first soldering pin and the circuit board and reduce the difficulty of the soldering process. Attached Figure Description
[0016] Figure 1 This is a schematic diagram of the battery pack structure of this application.
[0017] Figure 2 yes Figure 1 An exploded 3D view of the battery pack shown.
[0018] Figure 3 yes Figure 2 Enlarged view of the circled area shown.
[0019] Figure 4 yes Figure 2 A further exploded 3D view of the battery pack shown.
[0020] Figure 5 yes Figure 4 The diagram shows a partial structural diagram of the battery pack.
[0021] Figure 6 yes Figure 5 Enlarged view of the circled area shown.
[0022] Figure 7 yes Figure 5 The diagram shows the structure of the terminal assembly and the circuit board after assembly.
[0023] Figure 8 yes Figure 7 A schematic diagram of the structure shown from another perspective.
[0024] Figure 9 yes Figure 8 An exploded 3D diagram of the structure shown.
[0025] Figure 10 yes Figure 9 An exploded perspective view of the terminal assembly shown.
[0026] Figure 11 yes Figure 10 The diagram shows the structure of the terminal block.
[0027] Figure 12 yes Figure 11 A schematic diagram of the terminal block from another perspective.
[0028] Figure 13 This is a schematic diagram of the structure of a terminal assembly according to another embodiment of this application.
[0029] Figure 14 yes Figure 13 The schematic diagram of the terminal block shown
[0030] Figure 15 yes Figure 14 A schematic diagram of the terminal block from another perspective. Detailed Implementation
[0031] Exemplary embodiments will now be described in detail, examples of which are illustrated in the accompanying drawings. When the following description relates to the drawings, unless otherwise indicated, the same numerals in different drawings denote the same or similar elements. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with this application.
[0032] The terminology used in this application is for the purpose of describing particular embodiments only and is not intended to limit the application. Unless otherwise defined, the technical or scientific terms used in this application should be understood in their ordinary sense by one of ordinary skill in the art to which this utility model pertains. The terms "first," "second," and similar terms used in this application do not indicate any order, quantity, or importance, but are merely used to distinguish different components. Similarly, the terms "a" or "one" and similar terms do not indicate a quantity limitation, but rather indicate the presence of at least one. "A plurality" or "several" indicates two or more. Unless otherwise indicated, the terms "front," "rear," "lower," and / or "upper" and similar terms are for ease of description only and are not limited to a location or spatial orientation. The terms "comprising" or "including" and similar terms mean that the elements or objects preceding "comprising" or "including" encompass the elements or objects listed following "comprising" or "including" and their equivalents, and do not exclude other elements or objects. The terms "connected" or "linked" and similar terms are not limited to physical or mechanical connections and can include electrical connections, whether direct or indirect. The singular forms “a,” “the,” and “the” used in this application specification and appended claims are also intended to include the plural forms unless the context clearly indicates otherwise. It should also be understood that the term “and / or” as used herein refers to and includes any or all possible combinations of one or more of the associated listed items.
[0033] Please combine Figures 1 to 15 This application provides a battery pack 100, which includes a housing 10, a cell module 20, a circuit board 30, and a terminal assembly 40. The cell module 20, the circuit board 30, and the terminal assembly 40 are all installed inside the housing 10. The terminal assembly 40 is installed on the circuit board 30.
[0034] The terminal assembly 40 includes a terminal base 41 and a terminal group 42 mounted on the terminal base 41. The terminal group 42 includes two first terminals 50 and two second terminals 60, with the two second terminals 60 located between the two first terminals 50. The terminal base 41 has a first terminal slot 411 for mounting the first terminals 50 and a second terminal slot 412 for mounting the second terminals 60. The first terminal 50 includes a first body portion 51, a first mating portion 52 extending from the first body portion 51, and a first soldering pin 53. The first body portion 51 is inserted into the first terminal slot 411, the first mating portion 52 is configured to mate with a mating terminal, and the first soldering pin 53 is configured to be soldered to the circuit board 30. The first body portion 51 includes an exposed portion 510 exposed outside the terminal base 41, which is adjacent to the first soldering pin 53. The exposed portion 510 facilitates heat dissipation of the first terminal 50. The second terminal 60 includes a second body portion 61 and a second mating portion 62 and a second soldering pin 63 extending from the second body portion 61. The second body portion 61 is inserted into the second terminal slot 412, the second mating portion 62 is configured to cooperate with the mating terminal, and the second soldering pin 63 is configured to be soldered to the circuit board 30.
[0035] The extension direction of the first docking part 52 and the second docking part 62 is defined as the first direction X, and the extension direction of the first welding foot 53 and the second welding foot 63 is defined as the second direction Y. The first direction X is perpendicular to the second direction Y. The two first terminals 50 and the two second terminals 60 are arranged along the third direction Z. The third direction Z is perpendicular to the first direction X and the third direction Z is perpendicular to the second direction Y.
[0036] The terminal block 41 includes a base plate 43 with a first through hole 431 through which a first soldering pin 53 passes. The base plate 43 includes a bottom surface 430 facing away from the first terminal slot 411 and a guide surface 433 extending obliquely from the bottom surface 430 into the first through hole 431. The guide surface 433 extends obliquely from the bottom surface 430 toward the first soldering pin 53. The guide surface 433 is provided to space the first soldering pin 53 from the bottom surface 430. The guide surface 433 is a slope or an arc surface; in some embodiments, the guide surface 433 is a slope (see reference). Figure 11 and Figure 12 In other embodiments, the guide surface 433 is an arc surface (see reference). Figures 13 to 15 The distance between the guide surface 433 and the first soldering pin 53 is not less than 0.3mm. This design prevents the terminal block 41 near the first soldering pin 53 from melting due to high temperature when the first soldering pin 53 is soldered to the circuit board 30, thus ensuring the soldering quality between the first soldering pin 53 and the circuit board 30.
[0037] The base plate 43 also has a second through hole 432 through which the second welding foot 63 passes. The base plate 43 has a groove 434 formed by recessing upward from the bottom surface 430. The groove 434 connects to the second through hole 432. The groove 434 includes a clearance groove 435 and an exhaust groove 436, which are connected. The clearance groove 435 surrounds the second welding foot 63. The clearance groove 435 is provided to separate the second welding foot 63 from the bottom surface 430. The exhaust groove 436 extends along the first direction X and penetrates the side of the base plate 43 along the first direction X. The base plate 43 has two grooves 434, which correspond to the two second terminals 60 respectively. The depth of the groove 434 is not less than 0.3 mm, and the distance between the inner wall 437 of the groove 434 and the second welding foot 63 is not less than 0.3 mm. This design prevents the terminal block 41 near the second solder pin 63 from melting due to high temperatures when it is soldered to the circuit board 30, thus ensuring the soldering quality between the second solder pin 63 and the circuit board 30. When the circuit board 30 undergoes wave soldering, air at the soldering location can be smoothly discharged along the venting groove 436, making it easier to apply solder and ensuring soldering quality.
[0038] The terminal block 41 includes two positioning posts 44 extending from the base plate 43. The two positioning posts 44 are located on the side of the base plate 43 opposite to the first terminal slot 411 and the second terminal slot 412. In the third direction Z, the two positioning posts 44 are located on both sides of the two recesses 434. The circuit board 30 is provided with two mating holes 31, and the two positioning posts 44 mate with the two mating holes 31.
[0039] The first terminal 50 also includes a first additional portion 54 extending from the first body portion 51. The terminal base 41 is provided with a first retaining groove 413, and the first additional portion 54 is retained in the first retaining groove 413, with at least a portion of the first additional portion 54 exposed. The first additional portion 54 extends along a first direction X and is flat. In the second direction Y, the first additional portion 54 is disposed adjacent to the first mating portion 52. In the first direction X, the extension length of the first mating portion 52 is approximately the same as the extension length of the first additional portion 54. Two first retaining grooves 413 are disposed adjacently and located within the first terminal groove 411. The first terminal 50 includes a pair of first mating portions 52 and a pair of first additional portions 54, with the pair of first additional portions 54 respectively retained in the two first retaining grooves 413.
[0040] The second terminal 60 also includes a second additional portion 64 extending from the second body portion 61. The terminal base 41 is provided with a second retaining groove 414, and the second additional portion 64 is retained in the second retaining groove 414, with at least a portion of the second additional portion 64 exposed. The second additional portion 64 extends along a first direction X and is flat. In the second direction Y, the second additional portion 64 is disposed adjacent to the second mating portion 62. In the first direction X, the extension length of the second mating portion 62 is approximately the same as the extension length of the second additional portion 64. The two second retaining grooves 414 are disposed adjacently and located within the second terminal groove 412. The second terminal 60 includes a pair of second mating portions 62 and a pair of second additional portions 64, with the pair of second additional portions 64 respectively retained in the two second retaining grooves 414.
[0041] The addition of first and second attachments 54 and 64 increases the heat dissipation area, resulting in better heat dissipation. Furthermore, the first attachment 54 is fixed to the first retaining groove 413, and the second attachment 64 is fixed to the second retaining groove 414. This design prevents the first and second terminals 50 and 60 from easily becoming detached from the terminal block 41. The first and second terminals 50 and 60 and the terminal block 41 form a terminal assembly 40. When the circuit board 30 undergoes wave soldering, the terminal assembly 40 can be directly assembled onto the circuit board 30, making it more convenient and faster.
[0042] In this application, the terminal block 41 includes a base plate 43. The base plate 43 has a first through hole 431 and a second through hole 432. The first soldering foot 53 of the first terminal 50 passes through the first through hole 431, and the second soldering foot 63 of the second terminal 60 passes through the second through hole 432. The base plate 43 includes a bottom surface 430 and a guide surface 433 extending obliquely from the bottom surface 430 into the first through hole 431. The guide surface 433 extends obliquely from the bottom surface 430 toward the first soldering foot 53. The base plate 43 has a groove 434 formed by recessing upward from the bottom surface 430. The groove 434 communicates with the second through hole 432. The groove 434 includes a clearance groove 435 and an exhaust groove 436. The clearance groove 435 communicates with the exhaust groove 436. The clearance groove 435 is arranged around the second soldering foot 63. The exhaust groove 436 extends along a first direction X and penetrates the side of the base plate 43 along the first direction X. This design can improve the soldering yield between the first and second soldering pins 53 and 63 and the circuit board 30, reduce the difficulty of the soldering process, improve the heat dissipation effect of the first and second terminals 50 and 60, and improve the battery pack's range and lifespan.
[0043] The above description is merely a preferred embodiment of this application and is not intended to limit this application in any way. Although this application has disclosed the preferred embodiment as above, it is not intended to limit this application. Any person skilled in the art can make some modifications or alterations to the above-disclosed technical content to create equivalent embodiments without departing from the scope of the technical solution of this application. Any simple modifications, equivalent changes, and alterations made to the above embodiments based on the technical essence of this application without departing from the content of the technical solution of this application shall still fall within the scope of the technical solution of this application.
Claims
1. A terminal assembly for a battery pack, comprising a terminal holder and a terminal group mounted on the terminal holder, the terminal group including a first terminal, the terminal holder having a first terminal slot for mounting the first terminal, the first terminal including a first body portion and a first mating portion and a first soldering pin extending from the first body portion, the first body portion being inserted into the first terminal slot, the first mating portion being configured to mate with a mating terminal, and the first soldering pin being configured to be soldered to a circuit board, characterized in that... The terminal block includes a base plate with a first through hole through which the first soldering foot passes. The base plate includes a bottom surface facing away from the first terminal slot and a guide surface extending obliquely from the bottom surface into the first through hole. The guide surface extends obliquely from the bottom surface toward the first soldering foot, thereby separating the first soldering foot from the bottom surface.
2. The terminal assembly according to claim 1, characterized in that, The guide surface is an inclined surface or an arc surface.
3. The terminal assembly according to claim 1, characterized in that, The terminal group further includes a second terminal. The terminal holder has a second terminal slot for mounting the second terminal. The second terminal includes a second body portion and a second mating portion and a second soldering foot extending from the second body portion. The second body portion is inserted into the second terminal slot. The second mating portion is configured to cooperate with the mating terminal. The second soldering foot is configured to be soldered to the circuit board. The base plate has a second through hole through which the second soldering foot passes. The base plate has a groove formed by recessing upward from the bottom surface. The groove communicates with the second through hole. The groove includes a clearance groove and a venting groove. The clearance groove is arranged around the second soldering foot.
4. The terminal assembly according to claim 3, characterized in that, The terminal group includes two first terminals and two second terminals, with the two second terminals located between the two first terminals.
5. The terminal assembly according to claim 4, characterized in that, The base plate is provided with two grooves, and the two grooves are respectively provided for the two second terminals.
6. The terminal assembly according to claim 5, characterized in that, The extension direction of the first mating portion and the second mating portion is defined as the first direction, and the extension direction of the first welding foot and the second welding foot is defined as the second direction. The first direction is perpendicular to the second direction. The two first terminals and the two second terminals are arranged along a third direction, which is perpendicular to the first direction and the third direction is perpendicular to the second direction.
7. The terminal assembly according to claim 6, characterized in that, The exhaust channel extends along the first direction and penetrates the side of the base plate along the first direction.
8. The terminal assembly according to claim 1, characterized in that, The first body portion includes an exposed portion that is exposed outside the terminal block, and the exposed portion is disposed adjacent to the first solder foot.
9. The terminal assembly according to claim 1, characterized in that, The terminal block includes a positioning post extending from the base plate, the positioning post being located on the side of the base plate opposite to the first terminal slot, the positioning post being configured to mate with the circuit board.
10. A battery pack, comprising a housing, a cell module, a circuit board, and a terminal assembly as described in any one of claims 1 to 9, characterized in that, The battery cell module, the circuit board, and the terminal assembly are all installed inside the housing, and the terminal assembly is installed on the circuit board.