CN111384347B

CN111384347B - Battery connection module

Info

Publication number: CN111384347B
Application number: CN201811631941.XA
Authority: CN
Inventors: 林健兴; 吴筱凭; 洪丽琴; 章晓暖; 魏慧梅; 刘礼华
Original assignee: Molex LLC
Current assignee: Molex LLC
Priority date: 2018-12-29
Filing date: 2018-12-29
Publication date: 2022-08-30
Anticipated expiration: 2038-12-29
Also published as: KR20210007018A; KR20210007017A; CN115051118A; JP7013595B2; CN118198662A; JP2020109741A; CN111384347A; CN115051118B; TWI718500B; KR102239597B1; JP2021077649A; JP2021077651A; KR102239600B1; JP7013422B2; TW202027317A; JP7080361B2; KR20200083192A; KR102239603B1; CN115117563B; KR20210007016A

Abstract

A battery connection module includes a plurality of bus bars, two cross-over bus bars, a flexible circuit board, an electrode unit, and a power connection bar. Each bridging type bus piece is provided with a first bus section suitable for being electrically connected with a first battery pack, a second bus section suitable for being electrically connected with a second battery pack, and a bridging section connected between the first bus section and the second bus section. The flexible circuit board comprises an extension arm and a temperature sensor arranged on the extension arm, and the confluence piece is provided with a concave part correspondingly accommodating the temperature sensor. The electrode unit comprises an electrode plate lapped on the confluence piece, a holder for holding the electrode plate and a power connecting seat arranged on the electrode plate. The electric connecting strip is provided with an electric connector which is in butt joint with the electric connecting seat through the buckling structure, the aligning structure and the fastener.

Description

Battery connection module

Technical Field

The present invention relates to a battery connection module, and more particularly, to a battery connection module for connecting a battery pack in a modularized fashion.

Background

US patent No. US8,879,262 (corresponding to chinese invention patent application No. CN201080048799.1) discloses only the structure of the folding type bus part of the bus bar.

Chinese utility model patent publication No. CN206806468U discloses that a temperature sensor is mounted on a bus bar and fixed in a recess of a bus bar. But the temperature sensor and the circuit board are connected by another wire bonding or wiring. Therefore, the structure and manufacture are complicated, and the bonding structure of the wire bonding is easily damaged.

Chinese utility model patent publication No. CN206742321U (corresponding to chinese patent publication No. CN107046114A) discloses that the bus bar is fixed on the clamping plate at the end of the battery module through a switching base. Because the bus bar is connected with the clamping plate at the end part of the battery module through the switching base, the bus bar, the clamping plate and the switching base need to be mutually clamped and assembled, and the structure is more complex and unstable.

U.S. patent publication No. US2018/0287270a1 (corresponding to chinese patent publication No. CN108695602A) discloses that a first conductor and a second conductor are electrically connected by a connector, the fastening structure of which is similar to the present disclosure, but in order to improve the quick and aligned mating between the connectors, further innovation is required. Furthermore, the first conductor and the second conductor are not connected to the battery bus bar.

Disclosure of Invention

It is therefore an object of the present invention to provide a battery connection module that ameliorates at least one of the disadvantages of the prior art.

Therefore, in some embodiments, the battery connection module of the present invention is adapted to connect a first battery set and a second battery set side by side, and the battery connection module includes a carrier tray, a plurality of bus bars, and two bridging bus bars. The bus bars are assembled on the bearing plate, one part of the bus bars is suitable for being electrically connected with the first battery pack, and the other part of the bus bars is suitable for being electrically connected with the second battery pack. The two bridging bus bars are assembled on the bearing plate, and each bridging bus bar is provided with a first bus bar section suitable for being electrically connected with the first battery pack, a second bus bar section suitable for being electrically connected with the second battery pack, and a bridging section connected with the first bus bar section and the second bus bar section.

In some embodiments, the first bus section, the second bus section, and the bridge section of each cross-over bus are integrally formed.

In some embodiments, each bridge segment is folded into a multi-layer structure with a reduced width.

In some embodiments, the tray is provided with a receiving portion for receiving the bridging sections of the bridging-type bus bars stacked up and down.

In some embodiments, the carrier tray further comprises a bridge section holder having a holding end for holding the bridge section of one of the bridging bus bars to the carrier tray, and a fixing end adapted to be fixed to an end plate.

In some embodiments, the accommodating portion is provided with a retaining post penetrating through the bridging section and the retaining member for the bridging section.

In some embodiments, the surfaces of the bridge sections of the two bridging bus bars which are stacked together are covered with an insulating layer.

In some embodiments, the bridge section is coated with an insulating layer with the surface of the holding end of the holder.

In some embodiments, the accommodating portion has a first step portion and a second step portion located at different heights to respectively support and accommodate the bridging sections of the two bridging bus bar portions which are stacked in a staggered manner.

Therefore, in some embodiments, the battery connection module of the present invention includes a carrier tray, a plurality of bus bars, and a flexible circuit board. The bus bars are assembled on the carrier plate. The flexible circuit board comprises a body arranged on the bearing disc, an extension arm extending from the body towards the confluence piece, and a temperature sensor arranged on the extension arm and electrically connected with a circuit trace of the flexible circuit board, wherein a concave part correspondingly accommodating the temperature sensor is formed on the confluence piece.

In some embodiments, the flexible circuit board further includes an attachment tab attached to the extension arm and the bus bar to secure the extension arm to the bus bar.

In some embodiments, the attachment tab is attached to a surface of the extension arm facing away from the temperature sensor.

In some embodiments, the recess of the bus bar is filled with a thermally conductive filler encasing the temperature sensor.

In some embodiments, the bus bar has an extension tab extending toward the corresponding extension arm, and the recess is formed in the extension tab.

Therefore, in some embodiments, the battery connection module of the present invention includes a carrier tray, a plurality of bus bars, and an electrode unit. The bearing plate is formed with a containing groove. The bus bars are assembled on the carrier plate. The electrode unit is lapped on one of the confluence pieces and comprises an electrode plate, an electric power connecting seat and a retainer for the electrode plate, the electrode plate is arranged in the containing groove of the bearing plate and is lapped on the corresponding confluence piece, the electric power connecting seat is arranged on the electrode plate, and the retainer for the electrode plate is provided with a holding end part for holding the electrode plate on the bearing plate and a fixing end part suitable for being fixed on an end plate.

In some embodiments, the electrode sheet is superposed on the upper surface of the electrode sheet with the holding end portion of the holder.

In some embodiments, the holding end of the holder for electrode tabs and the surface of the portion where the electrode tabs are overlapped with each other are respectively provided with an insulating layer.

In some embodiments, an insertion frame is disposed at the receiving groove, and the holding end of the holder for electrode sheet is inserted into the insertion frame.

In some embodiments, the electrode sheet is formed with an opening through which a corresponding insert frame passes.

In some embodiments, the receiving groove is provided with a hook for hooking the electrode plate.

In some embodiments, the receiving groove is provided with a holding block, the end of the electrode sheet extends below the corresponding holding block, and the holding end of the holder for the electrode sheet is assembled to the holding block.

In some embodiments, a limiting groove corresponding to the end of the electrode plate is formed below the holding block, and the holding block is formed with an insertion groove corresponding to the holding end of the holder for the electrode plate.

In some embodiments, an interference projection that interferes with the insertion groove is formed on a side edge of the holding end portion of the holder for electrode sheets.

Therefore, in some embodiments, the battery connection module of the present invention includes a carrier tray, a plurality of bus bars, an electrode unit, and an electrical connection bar. The bus bars are assembled on the carrier plate. The electrode unit is lapped on one of the confluence pieces and comprises an electrode plate and an electric power connecting seat, the electrode plate is arranged on the bearing disc and lapped on the corresponding confluence piece, the electrode plate and the confluence piece are made of different metal materials, the electric power connecting seat is arranged on the electrode plate, the electric power connecting seat is provided with a first conducting ring arranged on the electrode plate, a sleeve arranged on the electrode plate and penetrating through the first conducting ring, and a shell arranged on the electrode plate and located on the periphery of the first conducting ring, and a first aligning structure and a first buckling structure are formed on the shell. The electric connecting strip comprises a conductive strip, an electric connecting head which is arranged at the tail end of the conductive strip and is used for being matched with the electric connecting seat, the electric connecting head comprises a conductive block which is lapped at the tail end of the conductive strip and is provided with a through hole, a second conductive ring which is arranged on the conductive block corresponding to the through hole, an upper shell and a lower shell which are mutually assembled to jointly contain the second conductive ring, and a fastening piece which is penetrated through the through hole of the conductive block and the second conductive ring and can be movably limited between the conductive block and the upper shell, the lower shell is integrally formed with an inserting part which is arranged at the periphery of the second conductive ring, a second aligning structure which is correspondingly matched with the first aligning structure, and a second buckling structure which is correspondingly matched with the first buckling structure, wherein after the electric connecting head is matched with the electric connecting seat, the inserting part is inserted into the shell, the fastener is assembled and connected with the sleeve, and the first conductive ring and the second conductive ring are mutually contacted so as to electrically connect the electrode plate and the conductive strip.

In some embodiments, the second alignment structure of the power connector includes a plurality of alignment blocks, the second fastening structure includes a plurality of fastening pieces, the alignment blocks and the fastening pieces are alternately disposed on the periphery of the insertion portion in sequence, the first alignment structure of the power connector includes a plurality of alignment holes for correspondingly receiving the alignment blocks, respectively, and the first fastening structure includes a plurality of fastening pieces for correspondingly fastening the fastening pieces, respectively.

In some embodiments, the fastening member has an insulating head portion confined between the conductive block and the upper shell, an insulating tail portion opposite to the insulating head portion, and an external thread portion located between the insulating head portion and the insulating tail portion, the upper shell has an opening exposing the insulating head portion, the sleeve has an internal thread hole for being locked with the external thread portion of the fastening member, and the power connection seat further has an insulating protection ring sleeved on the upper end opening of the sleeve.

In some embodiments, the electrode plate is formed with a setting hole, the first conductive ring of the power connection seat is correspondingly inserted through the setting hole, and the sleeve is correspondingly inserted through the first conductive ring.

In some embodiments, the first conductive ring of the power connector is integrally formed with the electrode plate, and the sleeve is correspondingly disposed in the first conductive ring.

In some embodiments, the conductive strip has a conductive portion formed by multiple layers of copper materials, and the conductive block of the power connector is a solid copper material.

In some embodiments, the bus bars are aluminum and the electrode sheet is solid copper.

The battery connecting module directly bridges the two battery packs through the bridging type bus bar piece which is integrally structured, and omits welding spots or connection points for wiring which are structured for connecting the two battery packs in series in the prior art. The bridge section is folded into a multilayer structure with a reduced width in the width direction to reduce the width to facilitate mounting and to be able to carry a large current at the same time. In addition, the temperature sensor electrically connected with the circuit trace of the flexible circuit board is directly fixed on the extension arm of the flexible circuit board and is directly and correspondingly arranged in the concave part of the bus piece, so that the assembly is simple and easy, and the temperature sensing is more direct. In addition, the electrode plate holder provides greater stress strength (torsion or force in other directions) for the electrode plate so as to avoid displacement or vibration of the electrode plate. Furthermore, the electric power connector and the electric power connecting seat can be quickly butted in an alignment way through the buckling structure and the alignment structure arranged between the electric power connector and the electric power connecting seat, and the fastener and the sleeve. Furthermore, the electrode plate is overlapped on the confluence piece made of different metal materials, so that the welding performance of each part is improved, the conductivity is increased, and the heat accumulation is reduced.

Drawings

Other features and technical effects of the present invention will be apparent from the embodiments with reference to the accompanying drawings, in which:

fig. 1 is a perspective view of a first embodiment of a battery connection module of the present invention;

FIG. 2 is an exploded perspective view of FIG. 1, with the power connection bar omitted;

FIG. 3 is an exploded perspective view of FIG. 2;

fig. 4 is a partial exploded perspective view illustrating the concave portion of the bus bar and the temperature sensor of the flexible circuit board of the first embodiment;

FIG. 5 is a partial perspective view illustrating the receiving slots and the electrode units of the carrier tray according to the first embodiment;

FIG. 6 is a top view of the first embodiment, with the top cover of the first embodiment omitted;

FIG. 7 is a cross-sectional view taken along line VII-VII of FIG. 6;

FIG. 8 is a perspective view illustrating the power connection head of the power connection strip and the power connection socket of the electrode unit of the first embodiment;

FIG. 9 is an exploded perspective view of FIG. 8;

fig. 10 is a top view illustrating the butting of the power connection head of the power connection strip of the first embodiment to the power connection socket of the electrode unit;

FIG. 11 is a cross-sectional view taken along line XI-XI in FIG. 10;

fig. 12 is a partial exploded perspective view illustrating the protection pad and the fixing member of the power connection strip of the first embodiment;

fig. 13 is a perspective view of a second embodiment of a battery connection module of the present invention;

FIG. 14 is an exploded perspective view of FIG. 13;

FIG. 15 is a partial perspective view illustrating the bridge portion of the bridge type bus bar of the second embodiment disposed in the accommodating portion of the tray;

FIG. 16 is a partial exploded perspective view of FIG. 15;

FIG. 17 is a perspective view illustrating the bridged bus bar of the second embodiment;

FIG. 18 is a perspective view of FIG. 17 from another perspective;

fig. 19 is a partial exploded perspective view illustrating the electrode unit of the second embodiment;

FIG. 20 is a further fragmentary exploded perspective view of FIG. 19;

FIG. 21 is an exploded perspective view illustrating the power connection strip of the second embodiment;

FIG. 22 is an exploded perspective view illustrating an electrode unit in an alternative embodiment;

FIG. 23 is a top view illustrating the electrode unit in this modified embodiment;

figure 24 is a cross-sectional view taken along line XXIV-XXIV in figure 23;

fig. 25 is a perspective view illustrating an electrode sheet of the electrode unit of the modified embodiment;

fig. 26 is a perspective view illustrating a power supply device in which the first and second embodiments and the battery pack thereof are mounted on the lower housing as described above; and

fig. 27 is an exploded perspective view of fig. 26.

List of reference numerals

100 cell connection module

100' battery connection module

1 bearing plate

1' carrying tray

11 lower limit strip

Upper limit block of 12

13 upper limit hook

14 positioning column

15 accommodating recess

16 mounting seat

161 hook

17 accommodating groove

17' holding groove

171 holding block

171a slot

172 limiting groove

173 inserting frame

174 hook

18 alignment bump

19 buckling lug

110 locus of containment

1101 the first stage

1102 second step part

1103 holding post

2 bus bar

21 electrode connection part

22 arched buffer part

23 extended tab

231 concave part

24 lap joint

3 Flexible printed Circuit Board

31 main body

311 positioning hole

312 bending buffer part

313 upward folding part

32 extension arm

33 temperature sensor

34 attachment tab

35 voltage acquisition sheet

4 electrode unit

41 electrode plate

41' electrode slice

410 inserting convex part

411 opening

412 insulating layer

413 provided with a hole

42 power connecting socket

421 first conducting ring

422 cannula

422a internal threaded hole

422b outer ring surface

422c lower flange

422d latch

423 outer casing

424 first alignment structure

424a alignment hole

425 first fastening structure

425a fastening block

426 insulated guard ring

43 electrode sheet holder

43' electrode sheet holder

431 holding end

432 fixed end

433 insulating layer

44 protective cover

441 cover body

442 second fastening structure

5 electric power connecting strip

5' power connection strip

51 conductive strip

511 conductive part

512 insulating outer layer

52 electric connector

521 conductive block

521a through hole

522 second conductive ring

523 Upper casing

523a is provided with an opening

523b buckling hole

524 lower casing

524a fastening block

525 fastener

525a insulating head

525b insulated tail

525c external thread part

526 plug part

527 second alignment structure

527a counterpoint block

528 second fastening structure

528a fastening piece

528b snap-fit recess

53 protective pad

54 fastener

541 belt part

542 fixing part

6 Upper cover

61 alignment groove

62 fastening hole

63 connecting seat opening

64 connector opening

7 electric connector

70 fastening groove

71 pin

72 protective cover

8 backboard

9 bridging type confluence piece

91 first bus-bar section

92 second bus bar section

93 bridge segment

94 insulating layer

10 bridge segment holder

101 holding end

102 fixed end portion

103 insulating layer

20 group battery

201 battery

202 first battery pack

203 second battery pack

30 Battery housing case

301 end plate

302 protective frame

200 power supply device

200a lower seat

D1 longitudinal direction

Width direction of D2

D3 vertical direction

Detailed Description

Before the present invention is described in detail, it should be noted that in the following description, like elements are represented by like reference numerals.

Referring to fig. 1 to 3, a battery connection module 100 according to a first embodiment of the present invention is adapted to be electrically connected to a battery pack 20, the battery pack 20 has a plurality of batteries 201 (12 in the first embodiment) and the battery pack 20 is accommodated in a battery accommodating case 30 together with protection frames 302 disposed at two ends of the battery accommodating case 30, and the battery accommodating case 30 has end plates 301 disposed at two ends. The battery connection module 100 includes a carrier tray 1, a plurality of bus bars 2, a flexible circuit board 3, two electrode units 4, two power connection bars 5, and an upper cover 6.

The carrier tray 1 extends along a length direction D1 and is adapted to be disposed on the battery pack 20 and is made of an insulating material. The bus bars 2 are assembled on the carrier tray 1 in two rows along a width direction D2 perpendicular to the length direction D1, and are adapted to electrically connect the cells 201 of the battery pack 20. In the first embodiment, each bus bar 2 has a plurality of electrode connecting portions 21 adapted to be connected to the electrodes of the battery 201, and a plurality of arching buffer portions 22 connected between adjacent electrode connecting portions 21 and arching in a direction away from the carrier tray 1 along a vertical direction D3 perpendicular to the length direction D1 and the width direction D2, the arching buffer portions 22 extending along the width direction D2, the carrier tray 1 includes a plurality of lower limiting bars 11 supported below the arching buffer portions 22 of the bus bar 2, and a plurality of upper limiting hooks 12 and a plurality of upper limiting hooks 13 located above the bus bar 2, and the bus bar 2 is limited by the lower limiting bars 11, the upper limiting bars 12 and the upper limiting hooks 13.

Referring to fig. 4 and 5, the flexible circuit board 3 includes a main body 31 disposed on the carrier tray 1 and located between two rows of the bus bars 2, a plurality of extension arms 32 extending from the main body 31 toward the bus bars 2, and a plurality of Temperature sensors 33 (e.g., NTC thermistors) disposed on the extension arms 32 and electrically connected to circuit traces of the flexible circuit board 3. the bus bars 2 further have extension tabs 23 extending toward the corresponding extension arms 32, and a recess 231 corresponding to the Temperature sensors 33 is formed on the top surface of the extension tabs 23 of the bus bar 2 at the end edge thereof, in a variation, the bus bars 2 may not have the extension tabs 23 but directly form the recess 231, and in another variation, the recess 231 may also be in the form of a blind hole, the flexible circuit board 3 further includes a plurality of attachment pieces 34, the attachment pieces 34 may be made of nickel, for example, and the attachment pieces 34 are attached to the surface of the extension arm 32 opposite to the temperature sensor 33 and the bus bar 2 by, for example, welding, so that the extension arm 32 is fixed on the bus bar 2. Further, the concave portion 231 of the bus bar 2 may be filled with a heat conductive filler (not shown) covering the temperature sensor 33, such as a heat conductive glue, etc., through which the heat energy on the bus bar 2 can be transferred to the temperature sensor 33, but not limited thereto. The temperature sensor 33 electrically connected to the circuit traces of the flexible circuit board 3 is directly fixed to the extension arm 32 of the flexible circuit board 3 and directly and correspondingly disposed in the recess 231 of the bus bar 2, so that the assembly is simple and easy and the temperature sensing is more direct, and the fixation of the extension arm 32 and the bus bar 2 to each other can be enhanced by attaching the extension arm 32 and the bus bar 2 by the attachment piece 34.

In the first embodiment, the main body 31 of the flexible circuit board 3 further has a plurality of positioning holes 311, a plurality of bending buffers 312 recessed downward along the vertical direction D3 and extending along the width direction D2, and an upward bending portion 313 bent upward along the vertical direction D3, and the carrier tray 1 further has a plurality of positioning posts 14 penetrating the positioning holes 311, a plurality of receiving recesses 15 receiving the bending buffers 312, and a mounting base 16 adjacent to the upward bending portion 313. The positioning posts 14 can be formed into enlarged heads by heat fusion at the ends to fix the flexible circuit board 3. The battery connection module 100 further includes an electrical connector 7 electrically connected to the folded portion 313, and a back plate 8. The mounting base 16 is formed with two buckling hooks 161 opposite to each other along the length direction D1, the electrical connector 7 is buckled on the mounting base 16 and has two buckling slots 70 correspondingly buckled with the buckling hooks 161 of the mounting base 16, a plurality of pins 71 located at the rear side and penetrating through the folded part 313 to be electrically connected with the circuit traces of the flexible circuit board 3, the back plate 8 is fixed to the pins 71 and clamps the folded part 313 together with the electrical connector 7, so as to enhance the holding force between the electrical connector 7 and the folded part 313. In addition, the flexible circuit board 3 further has a plurality of voltage collecting pieces 35 electrically connected to the body 31 and respectively contacting the bus bars 2 to collect voltage information of the bus bars 2. The status information (e.g., temperature, voltage, etc.) of the battery pack 20 can be collected by the temperature sensor 33 and the voltage collecting sheet 35 of the flexible circuit board 3 and can be transmitted to a battery management device (not shown) interfacing with the electrical connector 7 through the electrical connector 7 electrically connected to the flexible circuit board 3. The electrical connector 7 further has a protection cap 72 for protecting the electrical connector 7 when the electrical connector 7 is not mated with the device.

Referring to fig. 3, 5 to 7, the carrier tray 1 further has two receiving slots 17 formed at two ends of the length direction D1, each receiving slot 17 is provided with a retaining block 171, and a limiting slot 172 is formed below the retaining block 171. The two electrode units 4 are overlapped on two of the bus bars 2, and each electrode unit 4 includes an electrode sheet 41, an electric power connecting socket 42, and a holder 43 for the electrode sheet. The electrode plate 41 is disposed in the corresponding receiving groove 17 of the carrier tray 1 and is overlapped on an overlapping portion 24 formed by the corresponding bus bar 2, and an insertion protrusion 410 with a protruding tab structure is formed at the end of the electrode plate 41, and the insertion protrusion 410 extends into the limiting groove 172 below the corresponding holding block 171 to be received in the limiting groove 172. The power connector holder 42 is provided to the electrode tab 41, and the electrode tab holder 43 has a holding end portion 431 assembled to the corresponding holding block 171 to indirectly hold the corresponding electrode tab 41 on the carrier tray 1, and a fixing end portion 432 fixed to the adjacent end plate 301 by, for example, welding. Each holding block 171 is formed with an insertion groove 171a that receives the holding end portion 431 of the corresponding holder 43 for the electrode sheet. Each of the two side edges of the holding end portion 431 of the holder 43 for an electrode sheet is formed with a plurality of interference protrusions that interfere with the insertion groove 171a, so as to enhance the holding force between the holder 43 for an electrode sheet and the insertion groove 171 a. The electrode sheet 41 is provided with a greater force strength (torsion or force in other directions) by the electrode sheet holder 43 to prevent the electrode sheet 41 from being displaced or vibrated.

Referring to fig. 8 to 11, the power connection socket 42 is disposed on the electrode plate 41, and the power connection socket 42 has a first conductive ring 421 disposed on the electrode plate 41, a sleeve 422 disposed on the electrode plate 41 and penetrating through the first conductive ring 421, and a housing 423 disposed on the electrode plate 41 and located at the periphery of the first conductive ring 421. In the first embodiment, the first conductive ring 421 and the electrode plate 41 are integrally formed, but it may be a combination of two parts, which is not limited to this. The sleeve 422 passes through the electrode plate 41 and correspondingly passes through the first conductive ring 421. The housing 423 defines a first alignment structure 424 and a first buckling structure 425. The power connection strip 5 includes a conductive strip 51 and two power connectors 52 disposed at two ends of the conductive strip 51 and adapted to mate with the power connection socket 42. Each of the power connectors 52 includes a conductive block 521 overlapping the end of the conductive strip 51 and forming a through hole 521a, a second conductive ring 522 disposed on the conductive block 521 corresponding to the through hole 521a, an upper shell 523 and a lower shell 524 assembled to accommodate the second conductive ring 522 and the conductive block 521 together, and a fastener 525 penetrating the through hole 521a of the conductive block 521 and the second conductive ring 522 and movably disposed between the conductive block 521 and the upper shell 523, where the second conductive ring 522 and the conductive block 521 are also integrally formed in the first embodiment, but may be a two-piece combination, which is not limited thereto. The upper casing 523 and the lower casing 524 may be made of an insulating material, and in the first embodiment, the upper casing 523 has a plurality of fastening holes 523b formed at side edges thereof, and the lower casing 524 has a plurality of fastening blocks 524a correspondingly fastened to the fastening holes 523b, so that the upper casing 523 and the lower casing 524 are fastened to each other for mutual assembly. The lower housing 524 integrally forms a plug portion 526 located at the periphery of the second conductive ring 522, a second alignment structure 527 correspondingly engaged with the first alignment structure 424, and a second fastening structure 528 correspondingly engaged with the first fastening structure 425, wherein after the electrical connector 52 is coupled to the electrical connector socket 42, the plug portion 526 is plugged into the housing 423, and the fastening member 525 is coupled to the sleeve 422, so that the first conductive ring 421 and the second conductive ring 522 are contacted with each other, and the electrode plate 41 of the electrode unit 4 is electrically connected to the conductive strip 51 of the electrical connecting strip 5. The electrode tab 41 and the bus bar 2 are made of different metal materials. In the first embodiment, the material of the electrode of the battery 201 of the battery pack 20 is aluminum, and the bus bar 2 is an aluminum plate so that the bus bar 2 can be easily welded to the electrode of the battery 201 of the battery pack 20, but for example, the bus bar 2 may have a multi-layer aluminum structure. The electrode pads 41 attached to the bus bar 2 are made of solid copper material to increase the electrical conductivity of the electrode pads 41, and the electrode pads 41 made of copper have preferable thermal conductivity to further reduce the heat accumulation. The conductive strip 51 has a conductive portion 511 for the conductive block 521 to lap, and an insulating outer layer 512 covering the conductive portion 511, the conductive portion 511 is made of multiple layers of copper, the conductive portion 511 made of multiple layers of copper makes the conductive strip 51 more easily bent, the conductive block 521 of the power connector 52 is made of solid copper material to increase conductivity and reduce heat accumulation, thereby improving the welding performance of each component, increasing conductivity and reducing heat accumulation. However, in other modified embodiments, the bus bar 2, the electrode plate 41, the conductive portion 511 of the conductive strip 51, and the conductive block 521 of the power connector 52 may be made of other metal materials, and should not be limited to the first embodiment.

The second alignment structure 527 of the power connector 52 includes four alignment blocks 527a, and the second fastening structure 528 includes four fastening tabs 528a each having a fastening recess 528 b. The alignment blocks 527a and the locking pieces 528a are sequentially and alternately disposed on the periphery of the insertion portion 526. The first aligning structure 424 of the power connector socket 42 includes a plurality of aligning holes 424a for receiving the aligning blocks 527a, respectively, and the first fastening structure 425 includes a plurality of fastening blocks 425a for fastening with the fastening recesses 528b of the fastening pieces 528a, respectively. The fastening member 525 has an insulating head 525a limited between the conductive block 521 and the upper case 523, an insulating tail 525b opposite to the insulating head 525a, and an external thread 525c between the insulating head 525a and the insulating tail 525b, in the first embodiment, the insulating head 525a and the insulating tail 525b are formed on the fastening member 525 by injection molding and cladding of an insulating material. The upper casing 523 has an opening 523a exposing the insulation head 525a, the sleeve 422 has an internal threaded hole 422a for mating and locking with the external threaded part 525c of the fastener 525, an external annular surface 422b located at the outside and tapered with a narrow top and a wide bottom, a lower flange 422c located at the bottom and having a larger width, and a plurality of latches 422d adjacent to the lower flange 422 c. The sleeve 422 is easily pushed into the first conductive ring 421 from below through the outer ring surface 422b, and can be tightly fitted with the inner wall surface of the first conductive ring 421, the lower flange 422c can be abutted against the lower side of the first conductive ring 421, and the latch 422d can be inserted into the lower side of the inner wall surface of the first conductive ring 421 in an interfering manner, so as to increase the holding force between the sleeve 422 and the first conductive ring 421. The power connector 42 further has an insulation protection ring 426 covering the upper opening of the sleeve 422 and made of insulation material, and the insulation head 525a, the insulation tail 525b and the insulation protection ring 426 can prevent a user from getting an electric shock when the power connector 52 is connected to the power connector 42. And the power connector 52 and the power connection seat 42 can be quickly and oppositely butted through the fastening structure and the aligning structure between the power connector 52 and the power connection seat 42, and the fastening member 525 and the sleeve 422. In addition, the electrode unit 4 further includes a protecting cover 44 disposed on the power connection socket 42, the protecting cover 44 has a cover body 441 configured to cover the power connection socket 42, and a second fastening structure 442 extending from the cover body 441 and having a structure substantially the same as that of the second fastening structure 528 of the power connector 52, the second fastening structure 442 of the protecting cover 44 can be fastened to the first fastening structure 425 so that the protecting cover 44 covers the power connection socket 42, so that the protecting cover 44 can protect the power connection socket 42 when the power connection socket 42 is not connected to the power connector 52. In addition, referring to fig. 1 and 12, in the first embodiment, each electrical connecting strip 5 further has a plurality of protection pads 53 formed on the insulating outer layer 512, and a plurality of fixing members 54 disposed on the protection pads 53 to strengthen the fixing of the conductive strip 51, each fixing member 54 has a bundle of belt portions 541 sleeved on the protection pads 53, and a fixing portion 542 inserted or clamped in a frame of a housing, the conductive strips 51 of the electrical connecting strips 5 can be fixed in position by the fixing members 54, and the conductive strips 51 of the electrical connecting strips 5 are prevented from being hooked to other objects and pulled.

Referring back to fig. 1 to 3, the carrier tray 1 further has a plurality of alignment bumps 18 and a plurality of fastening bumps 19 on two sides of the width direction D2, in the first embodiment, two alignment bumps 18 are disposed on each side, the alignment bumps 18 are inverted L-shaped to align to the edge of the battery pack 20, and the alignment bumps 18 on two sides are staggered with each other in the width direction D2. The upper cover 6 is disposed above the carrier tray 1, and the upper cover 6 is formed with a plurality of alignment slots 61 for the alignment bumps 18 to correspondingly extend, a plurality of fastening holes 62 for the fastening bumps 19 to correspondingly fasten, two connecting socket openings 63 respectively corresponding to the power connecting sockets 42, and a connector opening 64 corresponding to the electrical connector 7. The matching of the alignment protrusions 18 and the alignment grooves 61 staggered in the width direction D2 can prevent the user from covering the top cover 6 on the carrier tray 1 in the wrong direction.

Referring to fig. 13 to 16, a battery connection module 100' according to a second embodiment of the present invention is different from the battery connection module 100 according to the first embodiment in that the second embodiment has two battery packs, respectively a first battery pack 202 and a second battery pack 203, which are arranged side by side, and the number of the batteries 201 of the first battery pack 202 and the second battery pack 203 is 18. The bus bars 2 are divided into four rows along the width direction D2, two rows of the bus bars are adapted to electrically connect the first battery pack 202, the other two rows of the bus bars are adapted to electrically connect the second battery pack 203, and the number of the flexible circuit boards 3 is two and is respectively and correspondingly electrically connected to two rows of the bus bars 2 of the first battery pack 202 and two rows of the bus bars 2 electrically connected to the second battery pack 203. The battery connection module 100 'further includes two bridging bus bars 9 assembled to the carrier tray 1', and two holders 10 for bridge segments. The two bridging bus bars 9 are assembled on the carrier tray 1', each bridging bus bar 9 has a first bus bar section 91 adapted to electrically connect to the first battery pack 202, a second bus bar section 92 adapted to electrically connect to the second battery pack 203, and a bridge section 93 connected to the first bus bar section 91 and the second bus bar section 92, the bridge section 93 is folded into a multi-layer structure with reduced width, so as to reduce the width for facilitating installation and load large current, the bridge section 93 is a three-layer structure in the second embodiment, but it may also be a multi-layer structure with other layers, without being limited thereto. In addition, the first bus bar section 91, the second bus bar section 92 and the bridge section 93 are integrally formed in the second embodiment, and the two battery packs (the first battery pack 202 and the second battery pack 203) are directly bridged by the bridging bus bar 9 which is integrally formed, so that the welding spots or the connection points for connecting the two battery packs (the first battery pack 202 and the second battery pack 203) in series in the prior art are omitted. The carrier tray 1' is provided with a receiving portion 110 located at one end in the length direction D1, the receiving portion 110 has a first step 1101 and a second step 1102 located at different heights, so as to respectively support and receive the bridging sections 93 of the two bridging bus bars 9 which are partially staggered and stacked up and down. The retaining members 10 for bridge segments are respectively pressed against the edges of the bridge segments 93, and each retaining member 10 for bridge segment has a retaining end 101 for directly pressing against the bridge segment 93 to retain the bridge segment 93 of the corresponding bridging bus bar 9 on the carrier tray 1', and a fixing end 102 adapted to be fixed to the adjacent one of the end plates 301 by, for example, welding. The accommodating portion 110 is further provided with three retaining posts 1103 passing through the bridging sections 93 and the retaining ends 101 of the holders 10 for bridging sections, and after assembling the bridging sections 93 of the bridging bus bars 9 and the holders 10 for bridging sections, the ends of the retaining posts 1103 can form enlarged heads (not shown) by heat melting, so as to hold the bridging sections 93 of the bridging bus bars 9 and the holders 10 for bridging sections. In addition, referring to fig. 17 to 18, in the second embodiment, the surface of the bridging section 93 where the two bridging bus bars 9 are overlapped is covered with the insulating layer 94, and the surface of the holding end 101 of the holding member 10 for the bridging section is covered with the insulating layer 103. The insulating layer 94 and the insulating layer 103, which are shown as the dark portions in the figure, can be made of plastic or resin, and can be formed by spraying, coating, or overmolding.

Referring to fig. 19 to 20, the receiving grooves 17 'are formed at the other end of the tray 1' opposite to the position where the receiving portion 110 is formed in the length direction D1, and are arranged along the width direction D2. Two insertion frames 173 are disposed at each receiving slot 17 ', each electrode sheet 41' is formed with an opening 411 through which the corresponding insertion frame 173 passes, and the holding end 431 of the holder 43 'for the electrode sheet is correspondingly inserted into the insertion frame 173 and directly overlaps the upper surface of the corresponding electrode sheet 41'. The insulating layer 412 and the insulating layer 433 are provided on the surfaces of the portions where the holding end portion 431 of the electrode tab holder 43 'and the electrode tab 41' overlap each other. The insulating layer 412 and the insulating layer 433 shown as the dark portions in the figure may be made of plastic or resin, and may be formed by spraying, coating, or overmolding, for example, or the insulating layer 412 and the insulating layer 433 may be an insulating sleeve assembled by a sleeve method, but not limited thereto. In the second embodiment, each receiving slot 17 ' is further provided with a hook 174 for hooking the corresponding electrode plate 41 ' to enhance the holding force for the electrode plate 41 '.

Referring to fig. 21, the power connection strip 5 'of the second embodiment differs from the power connection strip 5 of the first embodiment in that the insulated head portion 525a and the insulated tail portion 525b of the power connection strip 5' are assembled to the fastener 525, but they may also be over-molded as in the first embodiment. The conductive portion 511 is made of solid copper material, and the cross section of the conductive portion 511 covered by the insulating outer layer 512 is circular.

Referring to fig. 22 to 25, it should be noted that, in an alternative embodiment, the electrode sheet 41 'and the first conductive ring 421 are in an assembled form, in this alternative embodiment, each electrode sheet 41' is formed with a setting hole 413, and the first conductive ring 421 of the corresponding power connection seat 42 is correspondingly inserted through the setting hole 413. Thereby, the electrode sheet 41' can be assembled with the first conductive ring 421 in two forms to meet different space configuration requirements by respectively facing upward (as shown in fig. 25) or facing downward.

Referring to fig. 26 to 27, a plurality of power supply devices 200 are formed by installing the battery packs and the first and second embodiments in a housing, wherein only a lower seat 200a that may be included in the housing of the power supply device is shown, and the battery packs of the first and second embodiments are connected in series through the battery connection modules 100 and 100 'and the power connection bars 5 and 5' thereof, so that the power supply device 200 can provide a large current according to the requirement. It should be noted that the arrangement of the battery connection modules 100, 100 'and the battery pack and the arrangement of the power connection bars 5, 5' are only examples, and all of them can be adjusted according to the requirement. In addition, referring to fig. 1, the end plates 301 are two ends of the battery receiving case 30, and in a modified implementation, the end plates 301 may be separately disposed at two ends of the battery pack and may not be a part of the battery receiving case 30; in another variation, the end plate 301 may be, for example, a partition plate of the lower seat 200a, for example, the lower seat 200a may be provided with a plurality of partition plates to configure a space in which the battery pack is placed, and the partition plate located at the end of the battery pack may function as the end plate according to the present disclosure.

In summary, the battery connection module 100 according to the present invention directly bridges two battery packs (the first battery pack 202 and the second battery pack 203) via the bridging bus bar 9 having an integral structure, and omits a welding point or a connection point for connecting wires, which are constructed in the prior art to connect two battery packs (the first battery pack 202 and the second battery pack 203) in series. The bridge section 93 is folded into a multilayer structure with a reduced width in the width direction D2 to reduce the width for easy installation and at the same time to be able to carry a large current. Furthermore, the temperature sensor 33, which is electrically connected to the circuit traces of the flexible circuit board 3, is directly fixed to the extension arm 32 of the flexible circuit board 3 and directly correspondingly placed in the recess 231 of the bus bar 2, so that the assembly is simple and easy and the temperature sensing is more direct. In addition, the electrode sheet 41, 41 ' is provided with a greater force strength (torsion or force in other directions) by the electrode sheet holders 43, 43 ' to avoid displacement or vibration of the electrode sheets 41, 41 '. Furthermore, the power connector 52 and the power connector 42 can be quickly and precisely aligned and connected by the fastening structure and the alignment structure between the power connector 52 and the power connector 42, and the fastening member 525 and the sleeve 422. Further, the electrode tabs 41, 41' are overlapped on the bus bar 2 made of different metal materials, thereby improving the welding performance of each member, increasing the electrical conductivity, and reducing the heat accumulation.

While the invention has been described with reference to specific embodiments, it will be appreciated by those skilled in the art that various changes may be made and equivalents may be substituted for elements thereof without departing from the scope of the invention.

Claims

1. A battery connection module adapted to connect a first battery pack and a second battery pack side by side with each other, the battery connection module comprising:

a carrier tray;

a plurality of bus bars assembled on the bearing plate, wherein each bus bar is provided with a plurality of electrode connecting parts suitable for being connected with the electrodes of the batteries, one part of the bus bars is suitable for being electrically connected with the first battery pack, and the other part of the bus bars is suitable for being electrically connected with the second battery pack; and

two bridging bus bars assembled on the bearing plate, each bridging bus bar having a first bus bar section adapted to electrically connect the first battery pack, a second bus bar section adapted to electrically connect the second battery pack, and a bridging section connected to the first bus bar section and the second bus bar section, the first bus bar section having a plurality of electrode connecting parts connected to the electrodes of the plurality of batteries of the first battery pack, the second bus bar section having a plurality of electrode connecting parts connected to the electrodes of the plurality of batteries of the second battery pack; the two bridging type confluence pieces are positioned at the same end, and bridge sections of the two bridging type confluence pieces are overlapped up and down in a staggered mode.

2. The battery connection module of claim 1, wherein the first bus bar segment, the second bus bar segment, and the bridge segment of each cross-over bus bar are formed as a unitary construction.

3. The battery connection module according to claim 2, wherein each bridge segment is folded in a multi-layered structure with a reduced width.

4. The battery connection module of claim 3, wherein the tray has a receiving portion for receiving the bridging sections of the bridging bus bars stacked up and down.

5. The battery connection module of claim 4, further comprising a bridge segment retainer having a retaining end adapted to retain the bridge segment of one of the cross-over bus bars to the carrier tray and a securing end adapted to be secured to an end plate.

6. The battery connection module according to claim 5, wherein the accommodating portion is provided with a retaining post penetrating through the bridging section and the retaining member for the bridging section.

7. The battery connection module of claim 6, wherein the surfaces of the overlapping bridge segments of the two cross-over buss are coated with an insulating layer.

8. The battery connection module according to claim 7, wherein the bridge segment is coated with an insulating layer with a surface of the holding end of the holder.

9. The battery connection module of claim 8, wherein the receptacle has a first step and a second step at different heights for respectively receiving the bridging sections of the two bridging bus bar portions that are stacked in a staggered manner.