CN118156089A - Battery pack circuit breaking unit and battery pack - Google Patents
Battery pack circuit breaking unit and battery pack Download PDFInfo
- Publication number
- CN118156089A CN118156089A CN202410582527.3A CN202410582527A CN118156089A CN 118156089 A CN118156089 A CN 118156089A CN 202410582527 A CN202410582527 A CN 202410582527A CN 118156089 A CN118156089 A CN 118156089A
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- bdu
- battery pack
- circuit board
- connection
- main control
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- 238000003466 welding Methods 0.000 claims description 22
- 238000005452 bending Methods 0.000 claims description 18
- 238000004519 manufacturing process Methods 0.000 abstract description 7
- 238000005476 soldering Methods 0.000 description 14
- 238000010586 diagram Methods 0.000 description 10
- 238000000034 method Methods 0.000 description 10
- 230000008569 process Effects 0.000 description 7
- 238000009434 installation Methods 0.000 description 4
- 230000009471 action Effects 0.000 description 3
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 230000004308 accommodation Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 238000010030 laminating Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
Classifications
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H50/00—Details of electromagnetic relays
- H01H50/14—Terminal arrangements
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H50/00—Details of electromagnetic relays
- H01H50/02—Bases; Casings; Covers
- H01H50/021—Bases; Casings; Covers structurally combining a relay and an electronic component, e.g. varistor, RC circuit
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H50/00—Details of electromagnetic relays
- H01H50/02—Bases; Casings; Covers
- H01H50/04—Mounting complete relay or separate parts of relay on a base or inside a case
- H01H50/047—Details concerning mounting a relays
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/50—Current conducting connections for cells or batteries
- H01M50/572—Means for preventing undesired use or discharge
- H01M50/574—Devices or arrangements for the interruption of current
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/50—Current conducting connections for cells or batteries
- H01M50/572—Means for preventing undesired use or discharge
- H01M50/574—Devices or arrangements for the interruption of current
- H01M50/583—Devices or arrangements for the interruption of current in response to current, e.g. fuses
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
- H01R13/00—Details of coupling devices of the kinds covered by groups H01R12/70 or H01R24/00 - H01R33/00
- H01R13/62—Means for facilitating engagement or disengagement of coupling parts or for holding them in engagement
- H01R13/629—Additional means for facilitating engagement or disengagement of coupling parts, e.g. aligning or guiding means, levers, gas pressure electrical locking indicators, manufacturing tolerances
- H01R13/631—Additional means for facilitating engagement or disengagement of coupling parts, e.g. aligning or guiding means, levers, gas pressure electrical locking indicators, manufacturing tolerances for engagement only
- H01R13/6315—Additional means for facilitating engagement or disengagement of coupling parts, e.g. aligning or guiding means, levers, gas pressure electrical locking indicators, manufacturing tolerances for engagement only allowing relative movement between coupling parts, e.g. floating connection
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K1/00—Printed circuits
- H05K1/18—Printed circuits structurally associated with non-printed electric components
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
Landscapes
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Battery Mounting, Suspending (AREA)
Abstract
The invention discloses a battery pack breaking unit and a battery pack, and relates to the technical field of automobile battery pack breaking units, wherein the battery pack breaking unit comprises: the BDU supporting seat, a plurality of first type relays, a BDU main control circuit board and a plurality of electric connecting sheets, wherein the plurality of first type relays are fixed in the BDU supporting seat; the BDU main control circuit board is fixed on the top of the supporting seat; each electric connection sheet is arranged between the BDU main control circuit board and one of the first type relays and is welded with the BDU main control circuit board and the corresponding one of the first type relays. According to the invention, the BDU main control circuit board is connected with the first type relay through the electric connection sheet, so that larger mechanical stress is not generated in the manufacturing process, and the reliability of the BDU main control circuit board is ensured.
Description
Technical Field
The invention relates to the technical field of automobile battery pack circuit breaking units, in particular to a battery pack circuit breaking unit and a battery pack.
Background
BDU (battery disconnect unit) is a battery pack breaking unit, which is an important component of the new energy automobile and provides charge and discharge control, circuit overload protection and other functions for the high-voltage system of the new energy automobile. Various relays are important elements in the battery pack breaking unit and provide support for the normal operation of the battery pack breaking unit.
The prior BDU main control circuit board is in butt-plug connection with various relays mainly by adopting a plurality of paths of male and female terminals. But various relays and BDU main control circuit boards are connected in a plugging manner by adopting a plurality of male terminals and female terminals, unpredictable large mechanical stress can be generated in the assembly process, and the reliability of the BDU main control circuit board can be influenced because the mechanical stress can not be effectively released in the vehicle driving process.
Disclosure of Invention
The embodiment of the invention provides a battery pack circuit breaking unit and a battery pack, which are used for solving the technical problem that the BDU main control circuit board of the conventional battery pack circuit breaking unit is in opposite plug connection with various relays through a plurality of male and female terminals, so that unpredictable larger mechanical stress can be generated, and the reliability of the BDU main control circuit board is affected.
In a first aspect, there is provided a battery pack disconnection unit comprising:
BDU supporting seat;
the plurality of first-type relays are fixed in the BDU supporting seat;
The BDU main control circuit board is fixed on the top of the supporting seat;
and each electric connecting sheet is arranged between the BDU main control circuit board and one first type relay and is welded with the BDU main control circuit board and the corresponding one first type relay.
In some embodiments, each of the electrical connection pads comprises:
a connecting piece body;
an extension part extending vertically upwards along the side edge of the connecting sheet body, wherein the upwards extension of the extension part forms a first welding head;
The extension portion both sides are buckled and are formed the kink, every the kink upwards extends and forms the second soldered connection, first soldered connection and two the second soldered connection with the welding hole cooperation on the BDU main control circuit board still is equipped with the limit head on every the kink.
In some embodiments, the connecting piece body is provided with a positioning mounting hole, and the side edges of the connecting piece body at two sides of the positioning mounting hole are provided with bending flanges.
In some embodiments, the battery pack disconnection unit further includes a current sensor including:
The sensor comprises a sensor body, wherein a connecting circuit board is arranged on the sensor body;
The floating connection assembly comprises a male connection block and a female connection block which are mutually matched and connected, the male connection block is connected with the connection circuit board, the female connection block is used for being connected with the BDU main control circuit board, and the male connection block and the female connection block can move back and forth, left and right relatively and keep electric connection within a preset range.
In some embodiments, the male connection block includes a male connection fixed housing, a plurality of male connection terminals, and a male connection floating housing, where fixed ends of the plurality of male connection terminals are fixed at intervals on two sides of a lower end of the male connection fixed housing, and cantilever ends of the plurality of male connection terminals are arranged at intervals inside the male connection floating housing, and the male connection floating housing can move back and forth and left and right within a preset range in the male connection fixed housing;
The female connecting block comprises a female connecting fixed shell and a plurality of female connecting terminals, wherein fixed ends of the female connecting terminals are fixed on two sides of the upper end of the female connecting fixed shell at intervals, and cantilever ends of the female connecting terminals are arranged in the female connecting fixed shell at intervals;
When the female connection fixed shell is matched and connected with the male connection floating shell, the cantilever ends of the female connection terminals are connected with the cantilever ends of the male connection terminals in a one-to-one correspondence mode.
In some embodiments, the cantilevered end of each of the male connection terminals includes a bent portion that is bent in a U-shape a plurality of times and a connecting piece portion that extends upward along a distal end of the bent portion;
the cantilever end of each female connection terminal comprises two elastic clamping parts which are oppositely arranged, and the two elastic clamping parts are used for clamping the corresponding connection sheet parts.
In some embodiments, a plurality of accommodating spaces are arranged in the BDU support seat, and the accommodating spaces are used for installing the first type relay, the current sensor, the second type relay and the pre-charging resistor.
In some embodiments, the battery pack disconnection unit further comprises:
the plurality of input/output electrode plates are arranged on the BDU supporting seat;
The plurality of electric switching pieces are fixed on the BDU supporting seat, the lower end of one electric switching piece is welded with the corresponding input/output electrode piece, and the upper end of the electric switching piece is welded with the corresponding electric connecting piece.
In some embodiments, the battery pack disconnection unit further comprises:
And the main fuse is fixed in the BDU supporting seat and is directly connected with the positive electrode of the battery pack, and the current sensor is directly connected with the negative electrode of the battery pack.
In a second aspect, a battery pack is provided, including the battery pack breaking unit described above.
The technical scheme provided by the invention has the beneficial effects that:
The embodiment of the invention provides a battery pack circuit breaking unit and a battery pack, wherein the battery pack circuit breaking unit is provided with a plurality of electric connection sheets, the electric connection sheets are connected with a BDU main control circuit board and welded with a first type relay, and larger mechanical stress cannot be generated in the manufacturing process, so that the reliability of the BDU main control circuit board is ensured. In addition, the embodiment of the invention also avoids wiring harnesses through the electric connection sheet, saves the volume of the battery pack circuit breaking unit and reduces the production complexity.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for the description of the embodiments will be briefly described below, and it is apparent that the drawings in the following description are only some embodiments of the present invention, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
Fig. 1 is a schematic structural diagram of a battery pack breaking unit according to an embodiment of the present invention;
Fig. 2 is a schematic diagram of another structure of a battery pack breaking unit according to an embodiment of the present invention;
Fig. 3 is a schematic structural diagram of connection between a BDU main control circuit board and an electrical connection pad according to an embodiment of the present invention;
Fig. 4 is another schematic structural diagram of connection between a BDU main control circuit board and an electrical connection pad according to an embodiment of the present invention;
fig. 5 is a schematic structural view of an electrical connection sheet according to an embodiment of the present invention;
Fig. 6 is a schematic structural diagram of a current sensor according to an embodiment of the present invention;
FIG. 7 is a schematic diagram of a connection structure between a male connection block and a sensor body according to an embodiment of the present invention;
FIG. 8 is a schematic view of a male connection block according to an embodiment of the present invention;
FIG. 9 is a schematic diagram of a male connection block according to an embodiment of the present invention;
fig. 10 is a schematic structural diagram of connection between a female connection block and a BDU main control circuit board according to an embodiment of the present invention;
FIG. 11 is a schematic structural view of a female connection block according to an embodiment of the present invention;
Fig. 12 is another schematic structural view of a female connection block according to an embodiment of the present invention;
Fig. 13 is a schematic partial structure of a battery pack breaking unit according to an embodiment of the present invention;
FIG. 14 is a cross-sectional view of FIG. 13 provided by an embodiment of the present invention;
fig. 15 is an electrical schematic diagram of a battery pack breaking unit according to an embodiment of the present invention;
In the figure:
1. BDU supporting seat; 11. a first mounting assembly; 111. a mounting support; 112. a limit column; 12. a second mounting assembly; 121. a mounting column; 13. an accommodation space;
2. BDU master control circuit board;
3. A current sensor; 31. a sensor body; 32. a floating connection assembly; 321. a male connection block; 3211. a male connection fixed housing; 3212. a male connection terminal; 32121. a bending portion; 32122. a connecting piece part; 3213. a male connection floating housing; 32131. a groove; 322. a female connecting block; 3221. the female connection is fixed on the shell; 32211. wedge-shaped bayonet; 3222. a female connection terminal; 32221. an elastic clamping part; 323. positioning columns; 33. connecting a circuit board;
4. A main fuse;
5. a first type relay;
6. An electrical connection piece; 61. a connecting piece body; 611. positioning the mounting hole; 612. bending and flanging; 62. an extension; 621. a first welding head; 63. a bending part; 631. a second welding head; 632. a positioning head; 64. an electrical switching piece;
7. A second type relay;
8. Pre-charging a resistor;
9. And an input/output electrode sheet.
Detailed Description
For the purpose of making the objects, technical solutions and advantages of the embodiments of the present invention more apparent, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is apparent that the described embodiments are some embodiments of the present invention, but not all embodiments of the present invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
The embodiment of the invention provides a battery pack circuit breaking unit, which can solve the technical problem that the BDU main control circuit board of the conventional battery pack circuit breaking unit is connected with various relays in an opposite-plug manner through a plurality of male and female terminals, and unpredictable large mechanical stress can be generated, so that the reliability of the BDU main control circuit board is affected.
Referring to fig. 1 and 2, an embodiment of the present invention provides a battery pack disconnection unit, including: the BDU supporting seat 1, a plurality of first type relays 5, a BDU main control circuit board 2 and a plurality of electric connection pieces 6.
The plurality of first type relays 5 are fixed in the BDU supporting seat 1, and the BDU main control circuit board 2 is fixed on the top of the BDU supporting seat 1. Each electrical connection piece 6 is arranged between the BDU main control circuit board 2 and one of the first type relays 5 and is welded with the BDU main control circuit board 2 and the corresponding one of the first type relays 5.
Referring to fig. 1, three first-type relays 5 are disposed in the middle of the BDU support base 1, and a main positive relay, a main negative relay and a charging relay are sequentially disposed from right to left, wherein two electric connection pieces 6 are connected above the main positive relay, the main negative relay and the charging relay, and the two electric connection pieces 6 are connected with the BDU main control circuit board 2. Specifically, referring to fig. 3 and 4, the electrical connection piece 6 is firstly connected with the BDU main control circuit board 2 by adopting reflow soldering or wave soldering, then is connected with the main positive relay, the main negative relay and the charging relay by adopting laser soldering, and finally, the BDU main control circuit board 2 welded with the main positive relay, the main negative relay and the charging relay is connected with the BDU support seat 1, so that the whole process is free from the butt-plug connection of multiple paths of male and female terminals, the automatic production is convenient, and the final BDU is more intelligent.
The battery pack circuit breaking unit is provided with the plurality of electric connection pieces, the electric connection pieces are connected with the BDU main control circuit board and welded with the first type relay, larger mechanical stress is not generated in the manufacturing process, and the reliability of the BDU main control circuit board is guaranteed. In addition, the embodiment of the invention also avoids wiring harnesses through the electric connection sheet, saves the volume of the battery pack circuit breaking unit and reduces the production complexity.
As an alternative embodiment, in an embodiment of the invention, as shown in fig. 4 and 5, each of the electrical connection pads 6 includes: the connecting piece body 61, the extension part 62 that extends upwards vertically along the connecting piece body 61 side, the kink 63 that the both sides of extension part 62 are buckled and formed.
The extending portion 62 extends upwards to form a first welding head 621, two sides of the extending portion 62 are bent to form bending portions 63, each bending portion 63 extends upwards to form a second welding head 631, the first welding head 621 and the two second welding heads 631 are matched with welding holes on the BDU main control circuit board 2, and each bending portion 63 is further provided with a limiting head 632. The first welding head 621 and the two second welding heads 631 form a triangular welding structure, so that stability is better and welding is facilitated. The two spacing heads 632 with the laminating of BDU main control circuit board 2's downside can guarantee the position of electric connection piece 6, the welding process of being convenient for. In addition, the two bending parts 63 also form a bending flanging structure, so that the stability of the welding structure is further enhanced. After the first soldering head 621 and the two second soldering heads 631 are matched with the soldering holes on the BDU main control circuit board 2, the first soldering head and the two second soldering heads may be connected by reflow soldering or wave soldering, so as to realize automatic manufacturing.
Further, referring to fig. 5, the connecting piece body 61 is provided with positioning and mounting holes 611, and the positioning and mounting holes 611 facilitate positioning and welding the electric connecting piece 6. The side edges of the connecting piece body 61 at the two sides of the positioning and mounting hole 611 are provided with bending flanges 612.
As an alternative embodiment, in an embodiment of the invention, the battery pack breaking unit further comprises a current sensor 3.
Referring to fig. 6, 13 and 14, the BDU support base 1 is provided with a first installation assembly 11 and a second installation assembly 12, and the first installation assembly 11 and the second installation assembly 12 have a predetermined height difference therebetween. The BDU main control circuit board 2 is mounted on the second mounting assembly 12.
The current sensor 3 includes: a sensor body 31 and a floating connection assembly 32. The sensor body 31 is provided with a connection circuit board 33, and the sensor body 31 is mounted on the first mounting assembly 11.
The floating connection assembly 32 includes a male connection block 321 and a female connection block 322 which are cooperatively connected with each other, the male connection block 321 is connected with the connection circuit board 33, the female connection block 322 is connected with the BDU main control circuit board 2, and the male connection block 321 and the female connection block 322 can relatively move back and forth, left and right within a preset range and maintain electrical connection.
Referring to fig. 13 and 14, the sensor body 31 is fixed on the first mounting assembly 11 of the BDU support 1, the BDU main control circuit board 2 is fixed on the first mounting assembly 11 of the BDU support 1, and a gap with a preset height difference is left between the BDU main control circuit board 2 and the connection circuit board 33.
Referring to fig. 7, 8 and 9, the male connection block 321 includes a male connection fixed housing 3211, a plurality of male connection terminals 3212 and a male connection floating housing 3213, wherein fixed ends of the male connection terminals 3212 are fixed at intervals on two sides of a lower end of the male connection fixed housing 3211, cantilever ends of the male connection terminals 3212 are arranged at intervals inside the male connection floating housing 3213, and the male connection floating housing 3213 can move back and forth and left and right within a preset range in the male connection fixed housing 3211.
Referring to fig. 10, 11 and 12, the female connection block 322 includes a female connection fixing housing 3221 and a plurality of female connection terminals 3222, wherein fixed ends of the female connection terminals 3222 are fixed at intervals on two sides of a lower end of the female connection fixing housing 3221, and cantilever ends of the female connection terminals 3222 are arranged inside the female connection fixing housing 3221 at intervals.
When the female connection fixing housing 3221 is connected to the male connection fixing housing 3211 in a matching manner, the cantilever ends of the plurality of female connection terminals 3222 are connected to the cantilever ends of the plurality of male connection terminals 3212 in a one-to-one correspondence.
Further, as shown in fig. 8 and 9, the cantilever end of each male connection terminal 3212 includes a bending portion 32121 that is bent in a U-shape for several times and a connecting piece portion 32122 that extends upward along the end of the bending portion 32121, and a plurality of connecting piece portions 32122 are arranged at intervals inside the male connection floating housing 3213, and a certain gap exists between the male connection floating housing 3213 and the male connection fixed housing 3211 in the front-back direction and the left-right direction, that is, the connecting piece portions 32122 of the plurality of male connection terminals 3212 and the male connection floating housing 3213 can move in the front-back direction and the left-right direction within a preset range, so as to implement a floating connection function. As shown in fig. 11, the cantilever end of each of the female connection terminals 3222 includes two elastic clamping portions 32221 disposed opposite to each other, and the two elastic clamping portions 32221 are configured to clamp the corresponding connecting piece portion 32122. In fig. 11, a plurality of two elastic sandwiching portions 32221 provided opposite to each other are arranged at staggered intervals to correspond to the connecting piece portions 32122.
The male connection terminals 3212 of the male connection block 321 are connected to the connection circuit board 33, and the female connection terminals 3222 of the female connection block 322 are connected to the BDU main control circuit board 2. When the male connection floating housing 3213 is inserted into the female connection fixed housing 3221, the two elastic clamping portions 32221 of each female connection terminal 3222 clamp the connecting piece portion 32122 of the male connection terminal 3212 inside the corresponding male connection floating housing 3213. Because the male connection floating housing 3213 is floating, it can move back and forth and left and right within a predetermined range within the male connection fixed housing 3211. Therefore, when the male connection floating housing 3213 and the female connection fixed housing 3221 are inserted, no large mechanical stress is generated between the two, and the electrical connection stability between the current sensor 3 and the BDU main control circuit board 2 can be ensured without affecting the reliability of the BDU main control circuit board 2.
As an alternative embodiment, as shown in fig. 9 and 11, in an embodiment of the invention, grooves 32131 are formed on two sides of the inner portion of the male connection floating housing 3213, wedge-shaped bayonets 32211 are formed on two sides of the female connection fixed housing 3221, and the two wedge-shaped bayonets 32211 are correspondingly matched with the two grooves 32131, so that the male connection floating housing 3213 is conveniently matched and connected with the female connection fixed housing 3221.
As an alternative embodiment, in an embodiment of the invention, referring to fig. 8 and 12, a positioning column 323 is provided at the lower end of the male connection fixing housing 3211 and at the upper end of the female connection fixing housing 3221. The positioning posts 323 facilitate the positioning welding of the male connection fixed housing 3211 and the female connection fixed housing 3221.
As an alternative implementation manner, in an embodiment of the present invention, the fixed ends of the plurality of male connection terminals 3212 are connected to the connection circuit board 33 by using reflow soldering or wave soldering, so as to facilitate automatic processing. The fixed ends of the female connection terminals 3222 and the BDU main control circuit board 2 are connected by reflow soldering or wave soldering, so that the automatic processing is facilitated.
As an alternative embodiment, in an embodiment of the invention, as shown in fig. 14, the first mounting assembly 11 includes two mounting bases 111 disposed at intervals, and threaded fixing holes are formed in both of the mounting bases 111. Specifically, through holes are formed at two ends of the current sensor 3, and the through holes correspond to the threaded fixing holes, so that the current sensor 3 is conveniently fixed on the mounting support 111.
As an alternative embodiment, in an embodiment of the invention, as shown in fig. 13, a plurality of limiting posts 112 are provided around two of the mounting brackets 111. The plurality of limit posts 112 can limit the position of the current sensor 3, thereby further ensuring the accuracy of the mounting position.
As an alternative embodiment, in an embodiment of the invention, as shown in fig. 13 and 14, the second mounting assembly 12 includes a plurality of mounting posts 121 disposed at intervals, and a predetermined height difference is provided between the plurality of mounting posts 121 and the two mounting supports 111. The mounting columns 121 are convenient to fix the BDU main control circuit board 2, and meanwhile, the mounting columns 121 and the two mounting supports 111 have preset height differences, so that the male connection blocks 321 and the female connection blocks 322 can be ensured to have proper matching distances, and the male connection blocks 321 and the female connection blocks 322 can move up and down within a preset range, and a stress-free environment is ensured.
As an alternative embodiment, in an embodiment of the invention, referring to fig. 1, the battery pack breaking unit further includes: the second type relay 7 and the pre-charging resistor 8, the second type relay 7 and the pre-charging resistor 8 are fixed in the BDU supporting seat 1, the top ends of the second type relay 7 and the pre-charging resistor 8 are directly welded with the BDU main control circuit board 2, wiring harnesses are also avoided, and the volume of a battery pack breaking unit is saved. The second type relay 7 is a pre-charge relay.
As an alternative embodiment, as shown in fig. 1, in an embodiment of the invention, a plurality of accommodating spaces 13 are provided in the BDU support base 1, and the accommodating spaces 13 are used for installing the first type relay 5, the current sensor 3, the second type relay 7 and the pre-charging resistor 8, so that the structure is compact, and the volume of the battery pack breaking unit is saved.
As an alternative embodiment, in an embodiment of the invention, referring to fig. 1, the battery pack breaking unit further includes: a plurality of input-output electrode pads 9 and a plurality of electric switching pads 64.
The plurality of input/output electrode plates 9 are arranged on the BDU supporting seat 1, the plurality of electric switching plates 64 are fixed on the BDU supporting seat 1, the lower end of one electric switching plate 64 is welded with the corresponding input/output electrode plate 9, the upper end is welded with the corresponding electric connecting plate 6, and switching copper bars are saved.
As an alternative embodiment, in an embodiment of the invention, referring to fig. 1, the battery pack breaking unit further includes: and the main fuse 4 is fixed in the BDU supporting seat 1 and is directly connected with the anode of the battery pack. In addition, the current sensor 3 is directly connected with the negative electrode of the battery pack, so that a connecting component is saved. Fig. 15 is an electrical schematic diagram of the battery pack breaking unit.
The embodiment of the invention provides a battery pack, which comprises the battery pack breaking unit.
In the description of the present invention, it should be noted that the azimuth or positional relationship indicated by the terms "upper", "lower", etc. are based on the azimuth or positional relationship shown in the drawings, and are merely for convenience of describing the present invention and simplifying the description, and are not indicative or implying that the apparatus or element in question must have a specific azimuth, be constructed and operated in a specific azimuth, and thus should not be construed as limiting the present invention. Unless specifically stated or limited otherwise, the terms "mounted," "connected," and "coupled" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art according to the specific circumstances.
It should be noted that in the present invention, relational terms such as "first" and "second" and the like are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Moreover, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one … …" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises the element.
The foregoing is only a specific embodiment of the invention to enable those skilled in the art to understand or practice the invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features of the invention herein.
Claims (10)
1. A battery pack disconnection unit, comprising:
A BDU supporting seat (1);
The plurality of first-type relays (5) are fixed in the BDU supporting seat (1);
The BDU main control circuit board (2), the BDU main control circuit board (2) is fixed on the top of the BDU supporting seat (1);
and a plurality of electric connection pieces (6), wherein each electric connection piece (6) is arranged between the BDU main control circuit board (2) and one first type relay (5) and is welded with the BDU main control circuit board (2) and the corresponding first type relay (5).
2. The battery pack disconnection unit according to claim 1, wherein each of the electrical connection tabs (6) comprises:
a connecting piece body (61);
an extension part (62) extending vertically upwards along the side edge of the connecting sheet body (61), wherein the upwards extension of the extension part (62) forms a first welding head (621);
The two sides of the extension part (62) are bent to form bending parts (63), each bending part (63) extends upwards to form a second welding head (631), the first welding head (621) and the two second welding heads (631) are matched with welding holes in the BDU main control circuit board (2), and each bending part (63) is further provided with a limiting head (632).
3. The battery pack disconnection unit of claim 2, wherein:
The connecting piece body (61) is provided with a positioning mounting hole (611), and the side edges of the connecting piece body (61) at two sides of the positioning mounting hole (611) are provided with bending flanges (612).
4. The battery pack disconnection unit according to claim 2, further comprising a current sensor (3), the current sensor (3) comprising:
the sensor comprises a sensor body (31), wherein a connecting circuit board (33) is arranged on the sensor body (31);
The floating connection assembly (32), the floating connection assembly (32) comprises a male connection block (321) and a female connection block (322) which are mutually matched and connected, the male connection block (321) is connected with the connection circuit board (33), the female connection block (322) is used for being connected with the BDU main control circuit board (2), and the male connection block (321) and the female connection block (322) can move back and forth, left and right relatively and keep electric connection within a preset range.
5. The battery pack disconnection unit of claim 4, wherein:
The male connecting block (321) comprises a male connecting fixed shell (3211), a plurality of male connecting terminals (3212) and a male connecting floating shell (3213), fixed ends of the male connecting terminals (3212) are fixed on two sides of the lower end of the male connecting fixed shell (3211) at intervals, cantilever ends of the male connecting terminals (3212) are arranged in the male connecting floating shell (3213) at intervals, and the male connecting floating shell (3213) can move back and forth and left and right within a preset range in the male connecting fixed shell (3211);
The female connection block (322) comprises a female connection fixed shell (3221) and a plurality of female connection terminals (3222), fixed ends of the female connection terminals (3222) are fixed on two sides of the upper end of the female connection fixed shell (3221) at intervals, and cantilever ends of the female connection terminals (3222) are arranged in the female connection fixed shell (3221) at intervals;
when the female connection fixed shell (3221) is matched and connected with the male connection floating shell (3213), cantilever ends of the female connection terminals (3222) are connected with cantilever ends of the male connection terminals (3212) in a one-to-one correspondence mode.
6. The battery pack disconnection unit of claim 5, wherein:
The cantilever end of each male connection terminal (3212) comprises a bending part (32121) which is bent in a U shape for a plurality of times and a connecting sheet part (32122) which extends upwards along the tail end of the bending part (32121);
The cantilever end of each female connection terminal 3222 comprises two elastic clamping parts 32221 which are oppositely arranged, and the two elastic clamping parts 32221 are used for clamping the corresponding connecting sheet parts 32122.
7. The battery pack disconnection unit of claim 4, further comprising:
The BDU main control circuit board comprises a BDU supporting seat (1), a second type relay (7) and a precharge resistor (8), wherein the second type relay (7) and the precharge resistor (8) are fixed in the BDU supporting seat (1), and the top ends of the second type relay (7) and the precharge resistor (8) are welded with the BDU main control circuit board (2).
8. The battery pack disconnection unit of claim 4, further comprising:
The main fuse (4), main fuse (4) is fixed in BDU supporting seat (1) and is connected with the positive pole of battery package directly, current sensor (3) are connected with the negative pole of battery package directly.
9. The battery pack disconnection unit of claim 1, further comprising:
a plurality of input/output electrode plates (9), wherein the plurality of input/output electrode plates (9) are arranged on the BDU supporting seat (1);
The plurality of electric transfer sheets (64), the plurality of electric transfer sheets (64) are fixed on the BDU supporting seat (1), the lower end of one electric transfer sheet (64) is welded with the corresponding input and output electrode sheet (9), and the upper end is welded with the corresponding electric connecting sheet (6).
10. A battery pack comprising the battery pack disconnection unit of any of claims 1-9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202410582527.3A CN118156089B (en) | 2024-05-11 | 2024-05-11 | Battery pack circuit breaking unit and battery pack |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202410582527.3A CN118156089B (en) | 2024-05-11 | 2024-05-11 | Battery pack circuit breaking unit and battery pack |
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| Publication Number | Publication Date |
|---|---|
| CN118156089A true CN118156089A (en) | 2024-06-07 |
| CN118156089B CN118156089B (en) | 2024-08-06 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202410582527.3A Active CN118156089B (en) | 2024-05-11 | 2024-05-11 | Battery pack circuit breaking unit and battery pack |
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| US20230298838A1 (en) * | 2022-03-17 | 2023-09-21 | Calb Co., Ltd. | Relay, battery distribution box and battery pack |
| US20230317392A1 (en) * | 2020-10-27 | 2023-10-05 | Lg Energy Solution, Ltd. | Relay Switch Device Integrated With Pre-Charge System |
| CN117013285A (en) * | 2023-09-28 | 2023-11-07 | 武汉嘉晨电子技术有限公司 | High-low voltage integrated connecting piece, BDU and processing method thereof |
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2024
- 2024-05-11 CN CN202410582527.3A patent/CN118156089B/en active Active
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20160264080A1 (en) * | 2015-03-11 | 2016-09-15 | Lsis Co., Ltd. | Battery disconnect unit |
| CN109088466A (en) * | 2017-06-13 | 2018-12-25 | 浙江柳晶整流器有限公司 | A kind of Storage battery protecting device |
| KR20200081753A (en) * | 2018-12-28 | 2020-07-08 | 주식회사 유라코퍼레이션 | Battery disconnected unit |
| US20230317392A1 (en) * | 2020-10-27 | 2023-10-05 | Lg Energy Solution, Ltd. | Relay Switch Device Integrated With Pre-Charge System |
| US20230298838A1 (en) * | 2022-03-17 | 2023-09-21 | Calb Co., Ltd. | Relay, battery distribution box and battery pack |
| CN218920039U (en) * | 2022-12-28 | 2023-04-25 | 华鼎国联动力电池有限公司 | Flat BDU device |
| CN116461336A (en) * | 2023-05-06 | 2023-07-21 | 浙江极氪智能科技有限公司 | Battery pack cutting unit and battery pack charge-discharge control circuit |
| CN117013285A (en) * | 2023-09-28 | 2023-11-07 | 武汉嘉晨电子技术有限公司 | High-low voltage integrated connecting piece, BDU and processing method thereof |
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| Publication number | Publication date |
|---|---|
| CN118156089B (en) | 2024-08-06 |
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