Battery connection module

Abstract

A battery connection module includes a carrier plate, a plurality of busbars, a flexible circuit board, and at least one temperature sensing structure. The plurality of busbars are assembled on the carrier plate and are used to connect a plurality of batteries in series. The flexible circuit board is assembled on the carrier plate and includes a plurality of flexible arms extending therefrom to connect the plurality of busbars. The temperature sensing structure includes a first flexible arm, a first busbar, a temperature sensor, and a first metal bridge. The first flexible arm is one of the plurality of flexible arms, and the first busbar is one of the plurality of busbars. The first busbar has a recess near the flexible circuit board. An end of the first flexible arm has a setting surface for setting the temperature sensor. The temperature sensor is directly positioned above the recess. The first metal bridge includes a first end and a second end. The first end is connected to the setting surface of the end of the first flexible arm, and the second end is connected to the first busbar.

Description

Technical Field

[0001] This invention relates to the field of battery technology, and more specifically, to a battery connection module. Background Technology

[0002] Chinese invention patent publication CN111435723A discloses a battery connection module, specifically disclosing that a temperature sensing element is disposed on a flexible circuit board at its first end adjacent to a temperature sensing plate. The first end of the temperature sensing plate has an opening, and the temperature sensing element is located within this opening. The flexible circuit board also includes multiple encapsulation blocks, for example, encapsulating these temperature sensing elements with adhesive, and multiple support plates disposed on the opposite side of the temperature sensing elements, corresponding to their respective mounting surfaces. These encapsulation blocks protect the temperature sensing elements. In the aforementioned prior art, the temperature sensing element is mounted on the flexible circuit board, which is a distance away from the heat source (battery and busbar), thus affecting the accuracy of temperature acquisition.

[0003] Chinese invention patent publication number CN105684186B (corresponding to US invention patent publication number US9780351B2) discloses a casing composed of an upper casing and a lower casing that interlock. An interlocking tab on the upper casing engages with an interlocking protrusion on the lower casing, thus forming an assembled state. In the prior art, the interlocking tab of the upper casing has an open structure, and slits are provided on both sides of the interlocking tab to allow it to be elastic. However, because the slits on both sides of the interlocking tab weaken the structural strength around the upper casing, the upper casing is prone to quality problems such as breakage and warping. Summary of the Invention

[0004] Therefore, one object of the present invention is to provide a battery connection module that can improve at least one of the disadvantages of the prior art.

[0005] A battery connection module according to an embodiment of the present invention is used to connect multiple batteries. The battery connection module includes a carrier plate, multiple busbars, a flexible circuit board, and at least one temperature sensing structure. The multiple busbars are assembled on the carrier plate and are used to connect the multiple batteries in series. The flexible circuit board is assembled on the carrier plate and includes multiple extending flexible arms for connecting the multiple busbars. The temperature sensing structure includes a first flexible arm, a first busbar, a temperature sensor, and a first metal bridge piece. The first flexible arm is one of the multiple flexible arms, and the first busbar is one of the multiple busbars. The first busbar has a recess near the flexible circuit board. The end of the first flexible arm has a mounting surface for mounting the temperature sensor. The temperature sensor is located directly above the recess. The first metal bridge piece includes a first end and a second end. The first end is connected to the mounting surface at the end of the first flexible arm, and the second end is connected to the first busbar.

[0006] In some embodiments, the first end of the first metal bridging piece has an opening, and the temperature sensor is located within the opening.

[0007] In some embodiments, the temperature sensing configuration further includes an encapsulation block disposed on the mounting surface, the encapsulation block covering the temperature sensor and the first end of the first metal bridging piece.

[0008] In some embodiments, the temperature sensing structure further includes a back plate disposed on a back side of the first flexible arm opposite to the disposed surface.

[0009] In some embodiments, the mounting surface and the encapsulation block are opposite to the recess.

[0010] In some embodiments, the temperature sensing structure further includes a thermal pad disposed between the back plate and the bottom surface of the recess.

[0011] In some embodiments, the mounting surface and the encapsulation block face the recess.

[0012] In some embodiments, the first busbar has a cutout formed on the side facing the flexible circuit board, and a protrusion located next to the cutout, the protrusion having the recess on the side facing the cutout; the first flexible arm extends into the cutout, and the second end of the first metal bridging piece is connected to the protrusion.

[0013] In some embodiments, the flexible circuit board extends along a length direction, the cut and the protrusion face the flexible circuit board along a width direction, the end of the first flexible support arm extends into the cut and extends along the length direction, and the first metal bridging piece extends along the length direction.

[0014] In some embodiments, the first busbar has two or more battery connections and a buffer portion located between two adjacent battery connections, the cut spanning the buffer portion.

[0015] In some embodiments, the first metal bridging piece is electrically connected to the voltage acquisition circuit trace of the flexible circuit board for acquiring voltage.

[0016] Another embodiment of the present invention provides a battery connection module for connecting multiple batteries. The battery connection module includes a carrier plate, multiple busbars, and a top cover. The multiple busbars are assembled on the carrier plate and are used to connect the multiple batteries in series. The top cover is fastened to the carrier plate. The top cover has a top plate and a skirt that is vertically arranged around the top plate. The skirt has no holes, and the inner wall surface of the skirt has an inwardly extending first fastening portion. The carrier plate has an outwardly extending second fastening portion around it, and the second fastening portion is fastened to the first fastening portion.

[0017] In some embodiments, the first fastening portion is configured as an inwardly extending protrusion; the second fastening portion has a flexible upper extension arm and an outwardly extending fastening block; the fastening block fastens to the upper end of the protrusion.

[0018] In some embodiments, the protrusion has a first fastening surface and a first guiding surface, and the fastening block has a second fastening surface and a second guiding surface;

[0019] Both the first and second fastening surfaces are planar, with the first fastening surface extending horizontally inward from the inner wall of the skirt and the second fastening surface extending horizontally outward from the outer wall of the upper arm.

[0020] During the fastening process, the first guide surface and the second guide surface can abut against each other and slide relative to each other, and the first fastening surface and the second fastening surface can fasten together.

[0021] In some embodiments, the top plate of the cover has an opening near the edge and at a position corresponding to the first fastening part.

[0022] In some implementations, the top plate of the cover has an upturned fold near the edge.

[0023] One embodiment of the above invention has the following advantages or beneficial effects:

[0024] In the battery connection module of this invention, the temperature sensor is directly close to the recessed portion of the first busbar that generates heat. Due to the heat conduction effect of the first metal bridge piece close to the temperature sensor, the accuracy of temperature acquisition by the temperature sensor can be increased and the temperature response time can be shortened.

[0025] In addition, since the skirt of the cover has no holes and the inner wall of the skirt has an inwardly extending first fastening part, the structural strength of the skirt of the cover is guaranteed, and the cover is not prone to damage, warping or other quality-affecting problems. Attached Figure Description

[0026] Figure 1 The diagram shown is a structural schematic of a battery connection module according to an embodiment of the present invention.

[0027] Figure 2 The diagram shown is an exploded view of a battery connection module according to an embodiment of the present invention.

[0028] Figure 3 The diagram shown is an exploded view of the carrier plate and the top cover according to an embodiment of the present invention.

[0029] Figure 4 The diagram shown is a structural schematic of a battery connection module with the top cover removed according to an embodiment of the present invention.

[0030] Figure 5 The diagram shown is an exploded view of the battery connection module with the top cover removed according to an embodiment of the present invention.

[0031] Figure 6 The diagram shown is an exploded view of a temperature sensing structure according to an embodiment of the present invention, with the first busbar removed.

[0032] Figure 7 The diagram shown is a schematic representation of a temperature sensing structure according to an embodiment of the present invention.

[0033] Figure 8 The diagram shown is a structural schematic of a temperature sensing structure according to another embodiment of the present invention.

[0034] Figure 9 The diagram shown is a structural schematic of a temperature sensing structure according to another embodiment of the present invention.

[0035] Figure 10 The diagram shown is a structural schematic of the carrier plate and the top cover after assembly according to an embodiment of the present invention.

[0036] Figure 11 The diagram shown is a structural schematic of the carrier plate and the top cover according to an embodiment of the present invention.

[0037] Figure 12The diagram shown is a cross-sectional view of the carrier plate and the top cover after assembly according to an embodiment of the present invention.

[0038] Figure 13 What is shown is Figure 12 A magnified view of the area at point K.

[0039] The reference numerals in the attached figures are explained as follows:

[0040] 100. Battery connection module

[0041] 1. Support plate

[0042] 11. Disc body

[0043] 12. Side walls

[0044] 13. Receptacle

[0045] 131. Sub-groove

[0046] 14. Support section

[0047] 15. Pressing parts

[0048] 16. Second fastening part

[0049] 161. Extend your arm upwards

[0050] 162. Fastener

[0051] 163. Second guide surface

[0052] 164. Second snap-fit ​​surface

[0053] 17. Separation wall

[0054] 18. Clip-on post

[0055] 2. Busbar

[0056] 21. First busbar

[0057] 211. Depression

[0058] 212. Incision

[0059] 213. Convex plate section

[0060] 214. Battery connection part

[0061] 215. Buffer section

[0062] 22. Second busbar

[0063] 221. Battery connection part

[0064] 222. Buffer section

[0065] 3. Flexible circuit board

[0066] 31. First flexible outrigger

[0067] 311. Setting the surface

[0068] 312. Back side

[0069] 32. Second flexible outrigger

[0070] 33. Connector

[0071] 34. Snap-fit ​​hole

[0072] 4. Temperature sensing structure

[0073] 41. Temperature sensor

[0074] 42. First metal bridging piece

[0075] 421. First end

[0076] 422, Second End

[0077] 423. Opening

[0078] 43. Encapsulation block

[0079] 44. Back panel

[0080] 45. Thermal pad

[0081] 46. ​​Second metal bridging piece

[0082] 5. Top cover

[0083] 51. Top Slab

[0084] 52. Skirt hem

[0085] 521. Inner wall surface

[0086] 522. First fastening part

[0087] 5221, bump

[0088] 523. First snap-fit ​​surface

[0089] 524. First guiding surface

[0090] 53. Folding the edge

[0091] 54. Opening

[0092] 55. Cover

[0093] 551. Accommodation space

[0094] 552. Window

[0095] D1, Length direction

[0096] D2, Width Direction

[0097] D3, up and down direction Detailed Implementation

[0098] Exemplary embodiments will now be described more fully with reference to the accompanying drawings. However, these exemplary embodiments can be implemented in many forms and should not be construed as limited to the embodiments set forth herein; rather, they are provided so that the invention will be thorough and complete, and the concept of the exemplary embodiments will be fully conveyed to those skilled in the art. The same reference numerals in the drawings denote the same or similar structures, and therefore their detailed description will be omitted.

[0099] like Figure 1 and Figure 2 As shown, Figure 1 The diagram shown is a structural schematic of a battery connection module 100 according to an embodiment of the present invention. Figure 2 The diagram shown is an exploded view of a battery connection module 100 according to an embodiment of the present invention. The battery connection module 100 of this embodiment is used to connect multiple batteries and to detect the voltage, temperature, or other battery parameters of the multiple batteries.

[0100] The battery connection module 100 of this embodiment includes a carrier plate 1, multiple busbars 2, a flexible circuit board 3, and at least one temperature sensing structure 4.

[0101] For example, the carrier plate 1 can be a rectangular structure integrally formed of insulating material and extending along a length direction D1 and a width direction D2, wherein the length direction D1 and the width direction D2 are perpendicular to each other.

[0102] The carrier plate 1 includes a plate body 11 and a side wall 12 integrally formed on the plate body 11, with the side wall 12 located at the edge of the plate body 11.

[0103] like Figure 2 and Figure 3 As shown, Figure 3 The diagram shown is an exploded view of the carrier plate 1 and the upper cover 5 according to an embodiment of the present invention. The carrier plate 1 includes a plurality of receiving slots 13 for accommodating a plurality of manifolds 2.

[0104] The carrier plate 1 also includes a plurality of partition walls 17. One end of the plurality of partition walls 17 is connected to the side wall 12, and the other end extends into the inside of the carrier plate 1 to separate the plurality of receiving slots 13 described above. In one embodiment, each partition wall 17 may be perpendicular to the side wall 12, but is not limited thereto; for example, the partition walls 17 and the side wall 12 may also be arranged at an angle.

[0105] The carrier plate 1 also includes multiple support portions 14, with one support portion 14 disposed within each receiving groove 13. The support portion 14 may be elongated and arranged parallel to the partition wall 17 to divide one receiving groove 13 into two sub-grooves 131. That is, along the length direction D1, multiple support portions 14 and multiple partition walls 17 are arranged alternately. When the busbar 2 is installed in the receiving groove 13, the support portion 14 supports the busbar 2. The two sub-grooves 131 are respectively used to accommodate the two electrode connection portions of the busbar.

[0106] The carrier plate 1 also includes a plurality of pressing members 15, and each sub-groove 131 may be provided with one or more pressing members 15. When the manifold 2 is installed in the receiving groove 13, the pressing members 15 can press against the electrode connection portion of the manifold 2 to prevent the manifold 2 from falling out of the receiving groove 13. In one embodiment, the pressing member 15 can be an elastic fastener, but is not limited thereto.

[0107] It should be noted that, under the combined action of the isolation wall 17, the support part 14, and the pressing part 15, the manifold 2 is confined within the receiving groove 13. However, the manifold 2 is not absolutely fixed relative to the bearing plate 1. Rather, the manifold 2 can have slight movement relative to the bearing plate 1 to adapt to the subsequent ultrasonic welding process.

[0108] Please continue reading. Figure 2 and Figure 3 The carrier plate 1 also includes a snap-fit ​​post 18, which protrudes from the plate body 11. The flexible circuit board 3 has a snap-fit ​​hole 34. When the flexible circuit board 3 is assembled on the carrier plate 1, the snap-fit ​​post 18 is snapped into place through the snap-fit ​​hole 34.

[0109] like Figure 2 , Figure 4 and Figure 5 As shown, Figure 4 The diagram shown is a structural schematic of a battery connection module 100 according to an embodiment of the present invention with the top cover 5 removed. Figure 5 The diagram shown is an exploded view of a battery connection module 100 according to an embodiment of the present invention with the top cover 5 removed. Multiple busbars 2 can be respectively disposed within multiple receiving slots 13 of the carrier plate 1, and are mechanically and electrically connected to the electrodes between each battery by welding (e.g., ultrasonic welding). Furthermore, the staggered arrangement of these busbars 2 enables the batteries to form a series power circuit from start to finish.

[0110] Each busbar 2 can be integrally bent from a conductive material. Multiple busbars 2 are used to connect multiple batteries in series, and depending on whether they participate in battery temperature sensing, the multiple busbars 2 are further divided into first busbars 21 and second busbars 22. The first busbars 21 participate in battery temperature sensing. There can be one or more first busbars 21, and multiple second busbars 22.

[0111] like Figure 4 and Figure 5 As shown, the first busbar 21 has two or more battery connection portions 214, and a buffer portion 215 located between two adjacent battery connection portions 214. In this embodiment, the first busbar 21 has two battery connection portions 214.

[0112] The first busbar 21 has a cutout 212 formed on the side facing the flexible circuit board 3, and a protrusion 213 located next to the cutout 212. The cutout 212 crosses the buffer portion 215, and the protrusion 213 has a recess 211 on the side facing the cutout 212. The cutout 212 and the protrusion 213 of the first busbar 21 face the flexible circuit board 3 along a width direction D2.

[0113] The second busbar 22 has two or more battery connection portions 221, and a buffer portion 222 located between two adjacent battery connection portions 221. In this embodiment, the second busbar 22 has two battery connection portions 221.

[0114] like Figure 2 , Figure 4 and Figure 5 As shown, the flexible circuit board 3 is assembled on the carrier plate 1 and extends along a length direction D1. As mentioned above, the flexible circuit board 3 and the carrier plate 1 are connected by snap-fitting posts 18 and snap-fit ​​holes 34. The flexible circuit board 3 includes multiple extending flexible arms for connecting multiple busbars 2. Depending on whether they participate in battery temperature sensing, the multiple flexible arms are further divided into first flexible arms 31 and second flexible arms 32. The first flexible arms 31 participate in battery temperature sensing. There can be one or more first flexible arms 31, and multiple second flexible arms 32.

[0115] The first flexible support arm 31 extends into the cutout 212 of the first busbar 21. Further, the end of the first flexible support arm 31 extends into the cutout 212 of the first busbar 21 and extends in the length direction D1.

[0116] like Figures 5 to 7 As shown, Figure 6 The diagram shown is an exploded view of the temperature sensing structure 4 of an embodiment of the present invention with the first busbar 21 removed. Figure 7The diagram shown is a structural schematic of a temperature sensing structure 4 according to an embodiment of the present invention. The number of at least one temperature sensing structure 4 can be one or more, and multiple means two or more.

[0117] The temperature sensing structure 4 includes a first flexible support arm 31, a first busbar 21, a temperature sensor 41, and a first metal bridging piece 42. The first flexible support arm 31 is one of a plurality of flexible supports, and the first busbar 21 is one of a plurality of busbars.

[0118] The first busbar 21 has a recess 211 near the flexible circuit board 3, and the end of the first flexible support arm 31 has a mounting surface 311 for mounting a temperature sensor 41. The temperature sensor 41 is located directly above the recess 211. The first metal bridging piece 42 includes a first end 421 and a second end 422. The first end 421 is connected to the mounting surface 311 at the end of the first flexible support arm 31, and the second end 422 is connected to the first busbar 21.

[0119] It should be noted that the temperature sensor 41 (e.g., an NTC (Negative Temperature Coefficient thermistor)) can be electrically connected to the temperature acquisition circuit trace (not shown) of the flexible circuit board 3 for temperature acquisition. For example, the temperature sensor 41 can be mechanically and electrically connected to the temperature acquisition circuit trace of the flexible circuit board 3 by soldering.

[0120] The first metal bridging piece 42 can be a metal material with good thermal conductivity (e.g., an aluminum sheet), or a metal material that has both thermal and electrical conductivity (e.g., a nickel sheet). The first metal bridging piece 42 can conduct heat to increase the accuracy of temperature acquisition by the temperature sensor 41 and shorten the temperature response time. However, in other variations, the first metal bridging piece 42 can be made of other suitable materials as needed.

[0121] In the battery connection module 100 of this embodiment, the temperature sensor 41 is directly close to the recess 211 of the first busbar 21 that generates heat. Due to the heat conduction effect of the first metal bridge piece 42 close to the temperature sensor 41, the accuracy of temperature acquisition by the temperature sensor 41 can be increased and the temperature response time can be shortened.

[0122] like Figure 6 and Figure 7 As shown, the first metal bridging piece 42 extends in the length direction D1. The first end 421 of the first metal bridging piece 42 has an opening 423, within which the temperature sensor 41 is located. The second end 422 of the first metal bridging piece 42 is connected to the protrusion portion 213.

[0123] In this embodiment, the design of having an opening 423 at the first end 421 of the first metal bridging piece 42 and the temperature sensor 41 located within the opening 423 allows the temperature sensor 41 to be closer to the first metal bridging piece 42, thereby further improving the accuracy of temperature acquisition by the temperature sensor 41.

[0124] It should be noted that the first end 421 of the first metal bridging piece 42 can be connected to the first flexible support arm 31 of the flexible circuit board 3 via an adhesive. For example, the adhesive can be a thermally conductive adhesive. In a variant embodiment, the first metal bridging piece 42 can also be connected to the flexible circuit board 3 and the first busbar 21 via a welding method (e.g., ultrasonic welding or solder).

[0125] The temperature sensing structure 4 also includes an encapsulation block 43 disposed on the mounting surface 311, which covers the temperature sensor 41 and the first end 421 of the first metal bridge piece 42.

[0126] In this embodiment, by covering the temperature sensor 41 and the first end 421 of the first metal bridging piece 42 with the encapsulation block 43, the encapsulation block 43 can protect the temperature sensor 41. The encapsulation block 43 can be an adhesive, thermally conductive adhesive, antioxidant protective adhesive, or a combination thereof, and the material of the encapsulation block 43 can be, for example, silicone, epoxy resin, etc.

[0127] like Figure 6 and Figure 7 As shown, the temperature sensing structure 4 also includes a back plate 44, which is disposed on a back side 312 opposite to the mounting surface 311 of the first flexible support arm 31.

[0128] The first flexible support arm 31 has a mounting surface 311 for the temperature sensor 41 and an encapsulation block 43 facing away from the recess 211.

[0129] The temperature sensing structure 4 also includes a thermal pad 45, which is disposed between the back plate 44 and the bottom surface of the recess 211. In this embodiment, a thermal pad 45 is specifically provided between the back plate 44 and the bottom surface of the recess 211. The thermally conductive encapsulation block 43 or the additional thermal pad 45 can further enhance heat conduction and shorten the response time of the temperature sensor 41.

[0130] In one embodiment, the first metal bridging piece 42 is electrically connected to the voltage acquisition circuit trace (not shown) of the flexible circuit board 3 to acquire voltage. In other words, in this embodiment, the first metal bridging piece 42 can also be connected to the metal pad (not shown) of the flexible circuit board 3 by soldering, which can serve both as a temperature sensor and as a voltage acquisition device.

[0131] like Figure 2 , Figure 4 and Figure 5 As shown, the battery connection module also includes multiple second metal bridging pieces 46. The second metal bridging pieces 46 and the first metal bridging pieces 42 are two independent components. One end of the second metal bridging piece 46 is connected to the second flexible support arm 32, and the other end is connected to the second busbar 22. The second metal bridging piece 46 is electrically connected to the voltage acquisition circuit trace (not shown) of the flexible circuit board 3 for voltage acquisition. In one embodiment, the battery connection module also includes a back plate 44, with the back plate 44 and the second metal bridging pieces 46 respectively disposed on opposite sides of the second flexible support arm 32.

[0132] The second metal bridging piece 46 can be made of a conductive metal material (e.g., a nickel sheet).

[0133] like Figure 8 and Figure 9 As shown, Figure 8 The diagram shown is a structural schematic of temperature sensing structure 4 according to another embodiment of the present invention. Figure 9 The diagram shown illustrates the structure of a temperature sensing structure 4 according to another embodiment of the present invention. The difference between this other embodiment and the previous embodiment is that the mounting surface 311 of the first flexible support arm 31, where the temperature sensor 41 is located, and the encapsulation block 43 faces the recess 211. The encapsulation block 43 is close to or abuts against the bottom surface of the recess 211, enhancing heat conduction and shortening the response time of the temperature sensor 41.

[0134] like Figure 2 , Figure 10 and Figure 11 As shown, Figure 10 The diagram shown is a structural schematic of the carrier plate 1 and the upper cover 5 after assembly according to an embodiment of the present invention. Figure 11 The diagram shown is a structural schematic of the carrier plate 1 and the upper cover 5 according to an embodiment of the present invention.

[0135] The battery connection module 100 of this embodiment of the invention further includes an upper cover 5, which is fastened to a support plate 1. The upper cover 5 has a top plate 51 and a skirt 52 located around the top plate 51 and arranged vertically. The skirt 52 has no holes, and the inner wall surface 521 of the skirt 52 has an inwardly extending first fastening portion 522. The support plate 1 has an outwardly extending second fastening portion 16 around its periphery, and the second fastening portion 16 is fastened to the first fastening portion 522.

[0136] It should be noted that the absence of holes in the skirt 52 means that the skirt 52 is a complete and continuous annular structure without any holes, grooves, cuts, or other structures that would damage the structural strength of the skirt 52. This annular structure surrounds the edge of the top plate 51.

[0137] In this embodiment, since the skirt 52 has no holes and the inner wall surface 521 of the skirt 52 has an inwardly extending first fastening part 522, the structural strength of the skirt 52 of the upper cover 5 is guaranteed. During the frequent fastening process with the bearing plate 1, it is not easy to cause problems such as damage or warping that affect quality.

[0138] like Figure 10 As shown, the top plate 51 of the cover 5 has an upward-curving folded edge 53 near its edge, that is, the folded edge 53 is provided between the skirt edge 52 and the top plate 51. The design of the folded edge 53 can further enhance the structural strength of the cover 5.

[0139] An opening 54 is provided on the top plate 51 of the cover 5 near the edge, corresponding to the first fastening part 522. Through the opening 54, the first fastening part 522 and the second fastening part 16 are exposed. This makes it convenient for the operator to check whether the first fastening part 522 and the second fastening part 16 are fastened.

[0140] like Figure 12 and Figure 13 As shown, Figure 12 The diagram shown is a cross-sectional view of the carrier plate 1 and the upper cover 5 after assembly according to an embodiment of the present invention. Figure 13 What is shown is Figure 12 A partial enlarged view of the middle K section. The first fastening part 522 is configured as an inwardly extending protrusion 5221, and the second fastening part 16 has a flexible upper extension arm 161 and an outwardly extending fastening block 162, which fastens to the upper end of the protrusion 5221.

[0141] The protrusion 5221 has a first fastening surface 523 and a first guiding surface 524, and the fastening block 162 has a second guiding surface 163 and a second fastening surface 164. Both the first fastening surface 523 and the second fastening surface 164 are planar, with the first fastening surface 523 extending horizontally inward from the inner wall surface of the skirt 52, and the second fastening surface 164 extending horizontally outward from the outer wall surface of the upper extension arm 161. One of the first guiding surface 524 and the second guiding surface 163 is a slope, and the other is an outer arc surface. During fastening, the first guiding surface 524 and the second guiding surface 163 can abut against each other and slide relative to each other, and the first fastening surface 523 and the second fastening surface 164 can fasten together.

[0142] In this embodiment, the first guide surface 524 is an outer arc surface, and the second guide surface 163 is an inclined surface.

[0143] It should be noted that "inner" refers to the position on the inner wall surface 521 of the skirt edge 52, and "outer" refers to the position on the outer wall surface of the skirt edge 52. "Up and down" refers to the direction along a vertical direction D3 (the arrow of the vertical direction D3 in the figure points upwards, and its opposite is downwards), wherein the vertical direction D3 is perpendicular to the length direction D1 and the width direction D2.

[0144] When the upper cover 5 is fastened to the support plate 1 along the vertical direction D3, the first guide surface 524 of the protrusion 5221 and the second guide surface 163 of the fastener 162 can abut against each other and slide relative to each other, and the protrusion 5221 presses against the fastener 162. Since the upper arm 161 of the fastener 162 is flexible, the upper arm 161 will swing inward under the pressing force of the protrusion 5221. As the upper cover 5 moves downward, the inward swing angle of the upper arm 161 gradually increases. When the first guide surface 524 of the protrusion 5221 just disengages from the second guide surface 163 of the fastener 162, the upper arm 161 immediately returns to its original position, at which point the protrusion 5221 and the fastener 162 are fastened together. Since the first fastening surface 523 of the protrusion 5221 and the second fastening surface 164 of the fastener 162 are fastened together in the vertical direction D3 and motion interference occurs, the upper cover 5 will not detach from the support plate 1.

[0145] When it is necessary to remove the top cover 5 from the carrier plate 1, push the buckle 162 inward to make the upper extension arm 161 swing inward. When the second fastening surface 164 of the buckle 162 disengages from the first fastening surface 523 of the protrusion 5221, the protrusion 5221 disengages from the buckle 162.

[0146] like Figures 1 to 3 As shown, the flexible circuit board 3 also has a connector 33. A cover 55 protrudes from the upper surface of the top plate 51 of the top cover 5, and the cover 55 forms a receiving space 551 for receiving the connector 33 of the flexible circuit board 3.

[0147] The cover 55 has a window 552. When the flexible circuit board 3 is assembled on the carrier plate 1 and the top cover 5 is fastened to the carrier plate 1, the connector 33 is housed inside the receiving space 551 formed by the cover 55 and exposed through the window 552. An external cable (not shown) passes through the window 552 and can be connected to the connector 33 to connect a battery management device (not shown) to the flexible circuit board 3 to transmit the temperature and / or voltage information collected by the flexible circuit board 3 to the battery management device.

[0148] In summary, the advantages and beneficial effects of the battery connection module 100 according to the embodiments of the present invention include at least the following:

[0149] In the battery connection module 100 of this embodiment, the temperature sensor 41 is directly close to the recess 211 of the first busbar 21 that generates heat. Due to the heat conduction effect of the first metal bridge piece 42 close to the temperature sensor 41, the accuracy of temperature acquisition by the temperature sensor 41 can be increased and the temperature response time can be shortened.

[0150] In addition, the temperature sensing structure 4 also includes a thermal pad 45, which is disposed between the back plate 44 and the bottom surface of the recess 211. The thermally conductive encapsulation block 43 or the additional thermal pad 45 can further enhance heat conduction and shorten the response time of the temperature sensor 41.

[0151] In addition, since the skirt of the cover has no holes and the inner wall of the skirt has an inwardly extending first fastening part, the structural strength of the skirt of the cover is guaranteed, and the cover is not prone to damage, warping or other quality-affecting problems.

[0152] In the embodiments of the invention, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance; the term "multiple" refers to two or more unless otherwise explicitly defined. The terms "install," "connect," "link," and "fix" should be interpreted broadly. For example, "connect" can be a fixed connection, a detachable connection, or an integral connection; "link" can be a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in the embodiments of the invention according to the specific circumstances.

[0153] In the description of the embodiments of the invention, it should be understood that the terms "upper", "lower", "left", "right", "front", "rear", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the embodiments of the invention and simplifying the description, and do not indicate or imply that the device or unit referred to must have a specific orientation or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the embodiments of the invention.

[0154] In the description of this specification, the terms "one embodiment," "some embodiments," "specific embodiment," etc., refer to a specific feature, structure, material, or characteristic described in connection with that embodiment or example, which is included in at least one embodiment or example of the invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0155] The above are merely preferred embodiments of the invention and are not intended to limit the scope of the invention. Those skilled in the art will recognize that various modifications and variations can be made to the invention. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the invention should be included within the protection scope of the invention.

Claims

1. A battery connection module for connecting multiple batteries, characterized in that, The battery connection module includes: One carrier plate; Multiple busbars are assembled on the carrier plate, and the multiple busbars are used to connect the multiple batteries in series; A flexible circuit board is assembled on the carrier plate, the flexible circuit board including a plurality of extending flexible arms for connecting the plurality of busbars; as well as At least one temperature sensing structure, the temperature sensing structure comprising a first flexible support arm, a first busbar, a temperature sensor and a first metal bridge plate, wherein the first flexible support arm is one of the plurality of flexible support arms and the first busbar is one of the plurality of busbars; The first busbar has a recess near the flexible circuit board; the end of the first flexible arm has a mounting surface for mounting the temperature sensor; the temperature sensor is located directly above the recess; the first metal bridge includes a first end and a second end, the first end being connected to the mounting surface at the end of the first flexible arm, and the second end being connected to the first busbar; the first end of the first metal bridge has an opening, and the temperature sensor is located within the opening; the temperature sensing structure further includes a thermally conductive encapsulation block disposed on the mounting surface, the encapsulation block covering the temperature sensor and the first end of the first metal bridge.

2. The battery connection module according to claim 1, characterized in that, The temperature sensing structure also includes a back plate disposed on a back side of the first flexible arm opposite to the mounting surface.

3. The battery connection module according to claim 2, characterized in that, The mounting surface and the encapsulation block are opposite to the recessed portion.

4. The battery connection module according to claim 3, characterized in that, The temperature sensing structure also includes a thermal pad, which is disposed between the back plate and the bottom surface of the recess.

5. The battery connection module according to claim 2, characterized in that, The mounting surface and the encapsulation block face the recessed portion.

6. The battery connection module according to any one of claims 1-5, characterized in that, The first busbar has a cutout formed on the side facing the flexible circuit board, and a protrusion located next to the cutout, the protrusion having the recess on the side facing the cutout; the first flexible arm extends into the cutout, and the second end of the first metal bridging piece is connected to the protrusion.

7. The battery connection module according to claim 6, characterized in that, The flexible circuit board extends along a length direction, the cut and the protrusion face the flexible circuit board along a width direction, the end of the first flexible support arm extends into the cut and extends along the length direction; the first metal bridging piece extends along the length direction.

8. The battery connection module according to claim 7, characterized in that, The first busbar has two or more battery connections and a buffer portion located between two adjacent battery connections, the cut spanning the buffer portion.

9. The battery connection module according to claim 8, characterized in that, The first metal bridging piece is electrically connected to the voltage acquisition circuit trace of the flexible circuit board to acquire voltage.

10. A battery connection module for connecting multiple batteries, characterized in that, The battery connection module includes: One carrier plate; Multiple busbars are assembled on the carrier plate, and the multiple busbars are used to connect the multiple batteries in series; and A top cover is fastened to the support plate; the top cover has a top plate and a skirt that is vertically arranged around the top plate; The skirt has no holes, and the inner wall of the skirt has an inwardly extending first fastening part. The bearing plate has an outwardly extending second fastening part around it, and the second fastening part and the first fastening part fasten together. The top plate of the upper cover has an upwardly curved folded edge near the edge, and the folded edge is located between the skirt and the top plate.

11. The battery connection module according to claim 10, characterized in that, The first fastening part is configured as an inwardly extending protrusion; the second fastening part has a flexible upper extension arm and an outwardly extending fastening block; the fastening block fastens to the upper end of the protrusion.

12. The battery connection module according to claim 11, characterized in that, The protrusion has a first fastening surface and a first guiding surface, and the fastening block has a second fastening surface and a second guiding surface; Both the first and second fastening surfaces are planar, with the first fastening surface extending horizontally inward from the inner wall of the skirt and the second fastening surface extending horizontally outward from the outer wall of the upper arm. During the fastening process, the first guide surface and the second guide surface can abut against each other and slide relative to each other, and the first fastening surface and the second fastening surface can fasten together.

13. The battery connection module according to claim 11, characterized in that, An opening is provided on the top plate of the cover near the edge, at a position corresponding to the first fastening part.

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