CN210629957U

CN210629957U - Printed circuit board, power battery package and vehicle

Info

Publication number: CN210629957U
Application number: CN201921359370.9U
Authority: CN
Inventors: 钟远楷; 刘丽荣; 王军; J·W·江
Original assignee: Farasis Energy Ganzhou Co Ltd
Current assignee: Farasis Energy Ganzhou Co Ltd
Priority date: 2019-08-21
Filing date: 2019-08-21
Publication date: 2020-05-26
Anticipated expiration: 2029-08-21

Abstract

The utility model relates to an electric automobile technical field specifically relates to a printed circuit board, power battery package and vehicle. The printed circuit board comprises a circuit board main body and a voltage acquisition piece (2), wherein one end of the voltage acquisition piece (2) is installed in the circuit board main body and extends outwards, a deformation part is arranged in the middle of the voltage acquisition piece (2), and the deformation part is arranged to extend under the expansion effect of the battery core. This printed circuit board is through adopting the voltage acquisition piece that has the deformation portion for the expansion effect of electric core can also be born to the voltage acquisition piece on the basis that can fix electric core, simple structure, safe and reliable.

Description

Printed circuit board, power battery package and vehicle

Technical Field

The utility model relates to an electric automobile technical field specifically relates to a printed circuit board, power battery package and vehicle.

Background

With the wide application of electric vehicles, people pay more attention to the safety performance of electric vehicles, for example, the safety problem of power battery packs.

At present, with the research of power battery package is constantly deepened, people are more and more high to the security performance and the cost requirement of power battery package, and wherein, the security performance and the cost of manufacture of whole module are then related to the concrete design of the inside sampling PCB circuit board in the laminate polymer battery module. The sampling PCB circuit board of the traditional battery module adopts a nickel sheet as a voltage acquisition sheet, and two ends of the nickel sheet are respectively electrically connected with the PCB circuit board and the bus bar.

However, during preparation power battery package, the nickel piece is generally in the state of straining, that is to say, the internal surface of nickel piece sets up in the outside of utmost point ear with the mode of laminating, and along with power battery package's live time constantly increases, the inflation phenomenon then can take place for electric core, and then the outside extrusion nickel piece of busbar and utmost point ear is passed through to expanded electric core, leads to electric core can be bigger and bigger to the bulging force that is in the nickel piece application of the state of straining, causes easily collapsing of nickel piece disconnected, causes laminate polymer battery's security performance not good.

SUMMERY OF THE UTILITY MODEL

The utility model aims at overcoming the nickel piece that the PCB circuit board that prior art exists adopts the tight state of stretching tightly and taking place to collapse disconnected laminate polymer battery's safety problem that leads to because of the expansibility that can't bear electric core crescent, a printed circuit board, power battery package and vehicle are provided, this printed circuit board is through adopting the voltage acquisition piece that has the deformation portion for the expansion effect of electric core can also be born to the voltage acquisition piece on the basis that can fix electric core, moreover, the steam generator is simple in structure, safety and reliability.

In order to achieve the above object, an aspect of the present invention provides a printed circuit board, the printed circuit board includes a circuit board main body and a voltage collecting piece, the voltage collecting piece one end is installed in the circuit board main body and outwards extend, the middle part of the voltage collecting piece is provided with a deformation portion, the deformation portion is set up to extend under the expansion of the electric core.

Optionally, the deformation portion is provided as a folded portion.

Optionally, the circuit board main part includes main part board, first circuit, second circuit and electron device, the main part board is including setting up relatively first face and the second face of main part board both sides, first circuit sets up first face, the voltage acquisition piece install in first face and with first circuit electricity is connected, the second circuit sets up the second face, electron device install in the second face and with second circuit electricity is connected.

Optionally, the voltage acquisition piece includes first acquisition piece and has the second acquisition piece of folded portion, first acquisition piece is including the laminating install in the main part of first face and follow the main part is along keeping away from the connecting portion of the direction slope extension of first face, the second acquisition piece with connecting portion are connected and are faced the face direction extension of first face.

Optionally, a welding portion and a welding identification hole arranged close to the welding portion are formed at one end, far away from the first collecting piece, of the second collecting piece.

Optionally, the printed circuit board includes a plurality of voltage collecting plates arranged at intervals along the length direction of the main body plate.

Optionally, the printed circuit board includes a temperature measurement component for measuring the temperature of the tab, and the temperature measurement component is mounted on the first plate surface.

Optionally, the temperature measuring assembly includes a heat conducting pad and a temperature detector, one end of the temperature detector is mounted on the first plate surface and extends outward, and the heat conducting pad is mounted on the temperature detector and is attached to and disposed between the temperature detector and the tab so as to transfer the temperature of the tab to the temperature detector.

Optionally, the printed circuit board includes a low voltage terminal and a pin header mounted on the top of the main body board, and the low voltage terminal is connected to the pin header and disposed on one side of the main body board.

The utility model discloses the second aspect provides a power battery package, power battery package include utmost point ear support, busbar and printed circuit board, utmost point ear support is including utmost point ear and the support of connecting each other, the busbar includes the edge the length direction of support extends and the opening orientation the breach of circuit board main part, circuit board main part install in the support, the voltage acquisition piece is followed the extending direction of breach sets up and the tip install in keeping away from of busbar the open-ended part of breach, the deformation portion with the breach corresponds the setting.

Optionally, the power battery pack includes at least one of the following forms:

the first form: the part of the bracket, which corresponds to the circuit board main body, is provided with a groove structure;

the second form: the support is provided with a plurality of buckling structures, and the buckling structures are arranged to detachably clamp the circuit board main body to the support;

the third form: the outer plate surface of the circuit board main body, which is far away from the support, is positioned on the inner plate surface side of the bus bar, which is far away from the voltage acquisition sheet.

The utility model discloses the third aspect provides a vehicle, the vehicle include power battery.

Through above-mentioned technical scheme, provide a printed circuit board, power battery package and vehicle, this printed circuit board is through adopting the voltage acquisition piece that has the deformation portion for the swelling effect of electric core can also be born to the voltage acquisition piece on the basis that can fix electric core, simple structure, safe and reliable.

Drawings

Fig. 1 is a schematic structural diagram of a printed circuit board provided by the present invention;

FIG. 2 is a front view of the printed circuit board shown in FIG. 1;

FIG. 3 is a rear view of the printed circuit board shown in FIG. 1;

FIG. 4 is a top view of the printed circuit board shown in FIG. 1;

FIG. 5 is a partial enlarged view of portion A of FIG. 2;

FIG. 6 is a sectional view taken along the line G-G in FIG. 5;

FIG. 7 is a partial enlarged view of portion B of FIG. 2;

FIG. 8 is an enlarged view of a portion C of FIG. 2;

FIG. 9 is an enlarged view of a portion G of FIG. 2;

FIG. 10 is a sectional view taken along the line G-G in FIG. 9;

FIG. 11 is a schematic structural diagram of the voltage acquisition sheet shown in FIG. 1;

FIG. 12 is a front view of FIG. 11;

fig. 13 is a schematic structural view of a power battery pack provided by the present invention;

fig. 14 is a partial enlarged view of portion D of fig. 13;

FIG. 15 is a cross-sectional view taken along line I-I of FIG. 13;

fig. 16 is a partial enlarged view of portion E of fig. 15;

FIG. 17 is a sectional view taken along the line G-G in FIG. 13;

fig. 18 is a partially enlarged view of portion F of fig. 17;

FIG. 19 is an isometric view of the power cell pack of FIG. 13;

fig. 20 is a schematic structural diagram of the power battery pack shown in fig. 19 at a different viewing angle.

Description of the reference numerals

1. A main body plate; 11. a mounting structure; 12. positioning a groove; 2. a voltage acquisition sheet; 21. a first acquisition sheet; 22. a second acquisition sheet; 23. welding the identification hole; 24. welding the part; 25. a folding part; 3. an electronic device; 4. a temperature measuring component; 41. a thermally conductive pad; 42. a temperature-sensitive detector; 5. arranging needles; 6. a tab support; 7. a groove structure; 8. a buckle structure; 9. a bus bar; 91. a notch; 10. a connecting plate; 101. a low voltage terminal; 102. and (7) a tab.

Detailed Description

The following detailed description of the embodiments of the present invention will be made with reference to the accompanying drawings. It is to be understood that the description of the embodiments herein is for purposes of illustration and explanation only and is not intended to limit the invention.

The utility model provides a printed circuit board, as shown in fig. 1-20, printed circuit board includes circuit board main part and

voltage acquisition piece

2, 2 one end of voltage acquisition piece install in the circuit board main part is and outwards extend, the middle part of voltage acquisition piece 2 is provided with the deformation portion, the deformation portion sets up to extend under the inflation effect of electric core. It will be appreciated that the other end of the voltage pickup tab 2 is adapted to be mounted to a busbar.

Through above-mentioned technical scheme, provide a printed circuit board, power battery package and vehicle, this printed circuit board is through adopting voltage acquisition piece 2 that has the deformation portion for voltage acquisition piece 2 can also bear the inflation effect of electric core on the basis that can fix electric core, simple structure, safe and reliable.

In order to save the occupied space of the printed circuit board, as shown in fig. 9-12, the deformation portion is set as the folding portion 25, the structure is simple, the expansion of the battery core is facilitated, and the battery core can be still fixed, the problem that the battery is broken in the battery vibration process caused by the fact that the voltage acquisition piece is in a tight state in the prior art is solved, moreover, the battery core expands to cause the relative position of the busbar to move internally, the voltage acquisition piece 2 can partially or completely extend to meet the relative movement between the busbar and the circuit board main body under the pulling action of the busbar moving internally and the circuit board main body not moving internally (because the circuit board main body is mounted on the tab support not moving internally), and the deformation portion is not easy to damage and break, and is safe and reliable. Wherein, the voltage collecting plate 2 can be made of various reasonable materials, such as nickel plate.

In order to further save the installation space of the printed circuit board in the power battery pack, as shown in fig. 1-4, the circuit board main body includes a main body board 1, a first circuit, a second circuit and an electronic device 3, the main body board 1 includes a first board surface and a second board surface oppositely disposed on two sides of the main body board 1, the first circuit is disposed on the first board surface, the voltage collecting plate 2 is mounted on the first board surface and electrically connected to the first circuit, the second circuit is disposed on the second board surface, the electronic device 3 is mounted on the second board surface and electrically connected to the second circuit, so as to avoid that the electronic device 3 and the circuit lines connecting the electronic device 3 and the main body board 1 occupy too much top installation space due to the fact that the electronic device can only be disposed on the top of the main body board 1 (i.e., on the top as shown in fig. 1) as a result of the printed circuit board adopting a single-sided circuit in the prior art, through the mode that adopts two-sided circuit for voltage acquisition piece and electron device can set up respectively in the relative both sides of main part board, make full use of the space of printed circuit board both sides, practiced thrift the inner space of electric core, are favorable to improving the energy density of whole module. It is worth mentioning that the second plate surface of the main body plate 1 is a plate surface fitted with the tab support.

As shown in fig. 5 and 6, the voltage collecting tab 2 includes a first collecting tab 21 and a second collecting tab 22 having the folded portion 25, the first collecting sheet 21 includes a main body portion attached to the first plate surface and a connecting portion extending obliquely from the main body portion in a direction away from the first plate surface, the second is gathered piece 22 with connecting portion are connected and the orientation the face direction of first face extends, and the voltage acquisition piece that has avoided adopting the straight plate structure among the prior art is in the straight plate type state of tightening when the one end welding that deviates from first acquisition piece 21 of second acquisition piece 22 is on the busbar, prevents that the voltage acquisition piece from directly dragging the main part board and breaking off or becoming invalid after electric core inflation, and supplementary deformation portion improves the whole strength of bearing to electric core expansion deformation of voltage acquisition piece 2, has optimized the fixed effect of voltage acquisition piece to electric core. It is understood that the connection portion of the first pickup tab extends obliquely from the main body portion in a direction away from the battery cell, that is, the voltage pickup tab protrudes in a direction away from the battery cell (i.e., to the right as viewed in fig. 6). Furthermore, in order to save the installation space, the main body part of the first collecting piece is connected to the main body plate in a patch welding mode.

As shown in fig. 7, in order to mount the second collecting plate 22 to the bus bar, a welding portion 24 and a welding identification hole disposed adjacent to the welding portion 24 are formed at one end of the second collecting plate 22, which is far away from the first collecting plate 21, so as to facilitate welding, and compared with the existing bolt connection method, the welding method reduces the occupied space of the printed circuit board, is simple to operate, and reduces the manufacturing cost.

As shown in fig. 1 to 4, the printed circuit board includes a plurality of voltage collecting plates 2 arranged at intervals along the length direction of the main body plate 1, which is beneficial to more stably fixing the battery cell. In addition, the folding portion 25 can be provided with reasonable quantity according to the actual specification of voltage acquisition piece, for example, every voltage acquisition piece 2 includes a folding portion 25, simple structure, and the processing of being convenient for, perhaps, when voltage acquisition piece is longer, every voltage acquisition piece 2 rationally is provided with a plurality of folding portions 25, has improved the bearing strength that voltage acquisition piece warp to electric core inflation.

As shown in fig. 1-3, the printed circuit board includes a temperature measurement component 4 for measuring the temperature of the tab 102, and the temperature measurement component 4 is mounted on the first plate surface, so that the printed circuit board is simple in structure and convenient to mount.

Further, the temperature measurement component 4 includes a heat conduction pad 41 and a temperature detector 42, one end of the temperature detector 42 is installed on the first plate surface and extends outward, the heat conduction pad 41 is installed on the temperature detector 42 and is fitted between the temperature detector 42 and the tab 102 so as to transmit the temperature of the tab 102 to the temperature detector 42, so that the temperature of the tab 102 can be transmitted to the temperature detector 42 more uniformly, quickly and directly, and the problem that the temperature detector 42 is arranged on the main body plate so that the temperature of the tab is transmitted to the temperature detector through the bus bar and the nickel plate in the prior art is solved, the accuracy caused by the fact that the temperature of the tab is transmitted to the temperature detector through the bus bar and the nickel plate is low is solved, the test accuracy of the temperature measurement component 4 is improved, the temperature detector 42 can transmit the temperature of the electric core out accurately at the first time, and the whole vehicle is effectively prevented from thermal runaway or thermal control delay and the, in addition, the temperature-sensitive detector 42 is prevented from scratching the surface of the lug due to the fact that the temperature-sensitive detector 42 has the characteristic of flexibility and easiness in bending when the printed circuit board and the lug support are assembled, and the completeness of the surface of the lug is guaranteed. The heat conducting pad 41 may be provided in various reasonable forms, for example, the thickness is 1mm, and two sides (inner and outer surfaces as shown in fig. 2) of the heat conducting pad 41 are self-adhesive, and can be simultaneously adhered to the temperature-sensitive detector 42 and the tab 102 by means of adhesion, which is convenient for installation.

As shown in fig. 1-4, 19 and 20, printed circuit board includes low voltage terminal 101 and install in the row needle 5 at the top of main part board 1, low voltage terminal 101 with arrange the needle 5 and connect and set up one side of main part board 1, for the mode that directly adopts public female seat to peg graft among the prior art (wherein, public seat has caused the too much occupation to printed circuit board's headspace through the bolt mounting at the top of main part board), above-mentioned mode of setting is through arranging needle 5 that the installation volume is littleer, has practiced thrift printed circuit board's headspace, is connected with row needle 5 through setting up low voltage terminal 101 to install low voltage terminal in the vacant space department of power battery package, rationally utilized the space around the module, design benefit. Further, printed circuit board is including the connecting plate 10 shown in fig. 19 that the laminating module set up, in order to be used for connecting row needle 5 and low voltage terminal 101, in order to make the temperature data of the utmost point ear that printed circuit board measured and the voltage data of busbar collect and transmit for low voltage terminal 101 through row needle 5, in order to the control unit of outside quick, timely transmit the temperature and the pressure condition of electric core, be favorable to the staff to judge through the temperature and the pressure condition of the electric core that the control unit transmitted out whether the electric core is in abnormal conditions such as overheated or excessive pressure or short circuit, and the security is good. The pin header 5 can be arranged in various reasonable manners, for example, the pin header 5 is arranged on the upper right of the main body plate as shown in fig. 1 in a patch welding manner, so that the space is saved; further, the main body plate is provided with a mounting structure 11 at the upper right side as shown in fig. 1 for mounting the main body plate on the tab support, for example, as shown in fig. 8, the mounting structure 11 is provided with a positioning groove 12, and a limiting structure (for example, a snap structure) on the tab support is defined at the positioning groove 12 for positioning and mounting the main body plate.

The utility model discloses a second aspect provides a power battery package, as shown in fig. 12-20, power battery package include utmost point ear support 6, busbar 9 and printed circuit board, utmost point ear support 6 is including utmost point ear 102 and the support of connecting each other, busbar 9 includes the edge the length direction of support extends and the opening orientation breach 91 of circuit board main part, the circuit board main part install in the support, voltage acquisition piece 2 is followed the extending direction setting of breach 91 and the tip install in keeping away from of busbar the open-ended part of breach 91, the deformation portion with breach 91 corresponds the setting. Specifically, the busbars 9 are arranged in a structure like a Chinese character 'shan' as shown in fig. 13 and 19, each busbar 9 includes two notches 91 extending in the vertical direction, and the voltage collecting pieces are arranged at the left side notches or the right side notches of the busbars as shown in fig. 14, so that the voltage collecting pieces can reasonably utilize the vacant gaps around the module, and the voltage collecting pieces (particularly, the folded portions) are prevented from occupying too much space of the module. It can be understood that, as shown in fig. 13, 19 and 20, the power battery pack includes two sets of the tab support 6, the bus bar 9 and the printed circuit board, which are oppositely disposed, so as to monitor the temperature and pressure conditions of the battery cell more accurately and facilitate the stable installation of the battery cell.

Through above-mentioned technical scheme, provide a printed circuit board, power battery package and vehicle, this power battery package is through adopting the voltage acquisition piece 2 that has the deformation portion with printed circuit board for voltage acquisition piece 2 can also bear the inflation effect of electric core on the basis that can fix electric core, simple structure, safe and reliable.

As shown in fig. 14 to 18, the groove structure 7 is disposed on the portion of the bracket corresponding to the circuit board main body, when the printed circuit board is disposed in a double-sided circuit manner, the groove structure 7 can accommodate and mount the electronic device 3, and on the premise that the original attachment mounting between the bracket and the main body board of the circuit board main body is not affected, the electronic device 3 is mounted on the attachment surface between the bracket and the main body board, and does not occupy an internal hole of the battery pack, so that the occupied space of the electronic device 3 is saved, and the improvement of the energy density of the module is facilitated.

In order to conveniently carry out accurate location and firm installation to printed circuit board for utmost point ear support, the support is provided with a plurality of buckle structure 8, buckle structure 8 set up to can with circuit board main part detachably joint in the support, simple structure, the operation of being convenient for.

As shown in fig. 19 and 20, the outer board surface of the circuit board main body facing away from the bracket is located on the inner board surface side of the busbar 9 facing away from the voltage collecting plate 2, that is, the left board surface of the circuit board main body shown in fig. 20 (i.e., the board surface of the circuit board main body facing away from the battery cell) is located on the right side of the right board surface of the busbar 9 (i.e., the board surface of the busbar facing toward the battery cell), and specifically, the main board and the electronic device are both arranged on the right side of the right board surface of the busbar (i.e., the board surface of the busbar facing toward the battery cell), that is, the main board and the electronic device are both closer to the battery cell than the busbar, so that the design is more reasonable, and.

The preferred embodiments of the present invention have been described in detail with reference to the accompanying drawings, but the present invention is not limited thereto. In the technical idea scope of the present invention, it is possible to provide a solution of the present invention with a plurality of simple modifications to avoid unnecessary repetition, and the present invention is not described separately for various possible combinations. These simple variations and combinations should also be considered as disclosed in the present invention, all falling within the scope of protection of the present invention.

Claims

1. The utility model provides a printed circuit board, its characterized in that, printed circuit board includes circuit board main part and voltage acquisition piece (2), voltage acquisition piece (2) one end install in the circuit board main part and outwards extend, the middle part of voltage acquisition piece (2) is provided with deformation portion, deformation portion sets up to extend under the inflation effect of electric core.

2. A printed circuit board according to claim 1, characterized in that the deformation is provided as a fold (25).

3. The printed circuit board according to claim 2, wherein the circuit board main body includes a main body board (1), a first circuit, a second circuit, and an electronic device (3), the main body board (1) includes a first board surface and a second board surface oppositely disposed on both sides of the main body board (1), the first circuit is disposed on the first board surface, the voltage collecting tab (2) is mounted on the first board surface and electrically connected to the first circuit, the second circuit is disposed on the second board surface, and the electronic device (3) is mounted on the second board surface and electrically connected to the second circuit.

4. The printed circuit board according to claim 3, wherein the voltage collecting sheet (2) comprises a first collecting sheet (21) and a second collecting sheet (22) having the folding portion (25), the first collecting sheet (21) comprises a main body portion attached to the first board surface and a connecting portion extending obliquely from the main body portion in a direction away from the first board surface, and the second collecting sheet (22) is connected to the connecting portion and extends toward the board surface of the first board surface.

5. The printed circuit board according to claim 4, wherein an end of the second pickup sheet (22) remote from the first pickup sheet (21) is formed with a soldering portion (24) and a soldering identification hole provided next to the soldering portion (24).

6. The printed circuit board according to claim 5, wherein the printed circuit board comprises a plurality of the voltage collecting tabs (2) arranged at intervals along a length direction of the main body board (1).

7. The printed circuit board according to any one of claims 3 to 6, wherein the printed circuit board comprises a temperature measuring component (4) for measuring the temperature of the tab (102), and the temperature measuring component (4) is mounted on the first plate surface.

8. The printed circuit board according to claim 7, wherein the temperature measuring assembly (4) comprises a thermal pad (41) and a temperature detector (42), one end of the temperature detector (42) is mounted on the first board surface and extends outwards, the thermal pad (41) is mounted on the temperature detector (42) and is fit between the temperature detector (42) and the tab (102) for transmitting the temperature of the tab (102) to the temperature detector (42).

9. The printed circuit board according to claim 8, wherein the printed circuit board comprises a low voltage terminal (101) and a pin header (5) mounted on top of the main body board (1), the low voltage terminal (101) being connected to the pin header (5) and disposed at one side of the main body board (1).

10. A power battery pack, characterized in that the power battery pack comprises a tab holder (6), a busbar (9) and a printed circuit board according to any one of claims 1-9, the tab holder (6) comprising a tab (102) and a holder connected to each other, the busbar (9) comprising a notch (91) extending in the length direction of the holder and opening towards the circuit board body, the circuit board body being mounted to the holder, the voltage collecting plate (2) being arranged in the extension direction of the notch (91) and having an end mounted to a portion of the busbar remote from the opening of the notch (91), the deformation being arranged in correspondence with the notch (91).

11. The power battery pack of claim 10, wherein the power battery pack comprises at least one of the following:

the first form: a groove structure (7) is arranged on the part of the bracket, which corresponds to the circuit board main body;

the second form: the support is provided with a plurality of buckling structures (8), and the buckling structures (8) are arranged to be capable of detachably buckling the circuit board main body on the support;

the third form: the outer plate surface of the circuit board main body, which is far away from the bracket, is positioned on the inner plate surface side of the bus bar (9), which is far away from the voltage acquisition sheet (2).

12. A vehicle characterized in that the vehicle includes the power battery pack according to claim 10 or 11.