HRS BM25 Series Instruction Manual

TITLE:
BM25 Series Guideline
ETAD-H1018-00
PRODUCT:
BATTERY BOARD TO FPC CONNECTOR,
Pitch: 0.4mm, Width: 2.6mm,
Stacking height: 0.7mm, Power: 10A
PAGE:
1 OF 19
HIROSE ELECTRIC CO.,LTD
BM25 Series Guideline
Approver
WR.FUKUCHI
20210402
Checker
TS.MIYAZAKI
20210402
Designer
TY.MORISHITA
20210402
REVISIONS
RevNo
0
Designer
Checker
Approver
DATE
TABLE OF CONTENTS
Power contact
Power contact
Signal contact
Nov.1.2021Copyright2021HIROSEELECTRICCO.,LTD.AllRightsReserved.

TITLE:
BM25 Series Guideline
ETAD-H1018-00
PRODUCT:
BATTERY BOARD TO FPC CONNECTOR,
Pitch: 0.4mm, Width: 2.6mm,
Stacking height: 0.7mm, Power: 10A
PAGE:
2 OF 19
HIROSE ELECTRIC CO.,LTD
Page Number
1.Notice for Device Designing............................................................................................................................3
1-1 Notice for mechanical designing..........................................................................................................3
1-1.a Disengaging prevention...............................................................................................................3
1-1.b FPC FIXING.................................................................................................................................4
1-1.c Location of other components around connector........................................................................4
1-1.d Marking for mating position .........................................................................................................4
1-2 Notice for PWB designing...................................................................................................................5
1-2.a Recommended PWB pattern.......................................................................................................6
1-2.b PWB pad layout and connector location .....................................................................................6
1-2.c PWB designing ............................................................................................................................7
1-2.d FPC designing.............................................................................................................................8
2. Notice for Mounting....................................................................................................................................10
2-1 Metal mask design ............................................................................................................................10
2-2 Reflow profile.....................................................................................................................................11
2-3 Notice for...........................................................................................................................................12
2-3.a Repairing condition .....................................................................................................................12
2-3.b Solder swelling............................................................................................................................12
3 Notice for Connector Handling
3-1 Connector insertion operation.............................................................................................................13
3-2 Connector withdrawal operation..........................................................................................................14
4 PWB for Evaluation test .................................................................................................................................15
4-1 Contact Resistance Measurement.....................................................................................................15
4-2 Temperature Rise Test.......................................................................................................................16
5 Electrical inspection jig..................................................................................................................................17
5-1 Product name ....................................................................................................................................17
5-2 Electric inspection jig summary ..........................................................................................................17
5-3 Arrangement of the electric inspection jig ...........................................................................................18
5-4 Contact information of YOKOWO CO., LTD. ....................................................................................19
Nov.1.2021Copyright2021HIROSEELECTRICCO.,LTD.AllRightsReserved.

TITLE:
BM25 Series Guideline
ETAD-H1018-00
PRODUCT:
BATTERY BOARD TO FPC CONNECTOR,
Pitch: 0.4mm, Width: 2.6mm,
Stacking height: 0.7mm, Power: 10A
PAGE:
3 OF 19
HIROSE ELECTRIC CO.,LTD
1.Notice for Device Design
1.1 Notice for mechanical designing
1-1.a Disengagement prevention
Please use buffer material.
There is still possibility that connectors are disengaged if strong impact, such as dropping, is put against
connectors inuse.In order to prevent connectors from disengaging,pleasemake sure to putbuffer material
between a connector and a cover case to hold down the connector pair to the mating direction.
If a connector is directly pressed down by a cover case, there is a possibility that the cover case is bent
and it may cause connector disengagement when the device is dropped. Please avoid a design that the
connector is directly pressed by cover case, instead, use put the buffer material to press down the
connector.
Buffer material must be the size which is able to cover all over the connector mounting area.
×
Nov.1.2021Copyright2021HIROSEELECTRICCO.,LTD.AllRightsReserved.

TITLE:
BM25 Series Guideline
ETAD-H1018-00
PRODUCT:
BATTERY BOARD TO FPC CONNECTOR,
Pitch: 0.4mm, Width: 2.6mm,
Stacking height: 0.7mm, Power: 10A
PAGE:
4 OF 19
HIROSE ELECTRIC CO.,LTD
.1-1.b FPC FIXING
Do not completely fix the FPC position.
If FPC position is fixed, connector will get direct stress from dropping impact.
1-1.c Location of other components around connector
Please do not locate any material which may affect on connector mating around the
connectors.
It may cause a misalignment or breakage.
1-1.d Marking for mating position
Putting some marking to indicate the exact mating position is recommended.
It can support smooth mating.
Boss of cover
FPC
NG
Marking for positioning
Nov.1.2021Copyright2021HIROSEELECTRICCO.,LTD.AllRightsReserved.

TITLE:
BM25 Series Guideline
ETAD-H1018-00
PRODUCT:
BATTERY BOARD TO FPC CONNECTOR,
Pitch: 0.4mm, Width: 2.6mm,
Stacking height: 0.7mm, Power: 10A
PAGE:
5 OF 19
HIROSE ELECTRIC CO.,LTD
1.2 Notice for PWB designing
1-2.a Recommended PWB pattern
Fig 1-2.a(1) Receptacle (BM25-4S/2-V) Recommended PWB layout
Fig 1-2.a(2) Plug (BM25-4P/2-V) Recommended PWB layout
Nov.1.2021Copyright2021HIROSEELECTRICCO.,LTD.AllRightsReserved.

TITLE:
BM25 Series Guideline
ETAD-H1018-00
PRODUCT:
BATTERY BOARD TO FPC CONNECTOR,
Pitch: 0.4mm, Width: 2.6mm,
Stacking height: 0.7mm, Power: 10A
PAGE:
6 OF 19
HIROSE ELECTRIC CO.,LTD
1-2.b PWB pad layout and connector location
Fig 1-2.b(1) Receptacle Positioning
Fig 1-2.b(2) Plug Position
Connector read on PWB layout
PWB layout
Connector read on PWB layout
PWB layout
Nov.1.2021Copyright2021HIROSEELECTRICCO.,LTD.AllRightsReserved.

TITLE:
BM25 Series Guideline
ETAD-H1018-00
PRODUCT:
BATTERY BOARD TO FPC CONNECTOR,
Pitch: 0.4mm, Width: 2.6mm,
Stacking height: 0.7mm, Power: 10A
PAGE:
7 OF 19
HIROSE ELECTRIC CO.,LTD
1-2.c Notice for PWB design
・Recommended PWB pattern width is 1mm（Copper foil thickness=35μm）/1A
PWB Specifications for temperature rise evaluations are as follows.
１-２c(1) PWB for temperature rise evaluations of receptacle
１-2c(2) PWB for temperature rise evaluations of plug
Material：FR-4
PAD：Recommended pattern
Recommended Power contact
pattern width：10mm
Recommended Signal contact
pattern width ：0.3mm
Copper foil thickness：35μm
PWB size 70×20×0.8mm
Material：polyimide（single layer）
stiffener：FR-4
PAD：Recommended pattern
Recommended Power contact pattern
width：10mm
Recommended Signal contact pattern
width：0.3mm
Copper foil thickness：35μm
PWB size：38×11×0.435mm
*including stiffener thickness
Stiffener size：7×11×0.3mm
+10A
-10A
-10A
+10A
* Apply 0.3 Amps to each signal contact.
Power current (Amp)
Temperature rise (deg.)
Nov.1.2021Copyright2021HIROSEELECTRICCO.,LTD.AllRightsReserved.

TITLE:
BM25 Series Guideline
ETAD-H1018-00
PRODUCT:
BATTERY BOARD TO FPC CONNECTOR,
Pitch: 0.4mm, Width: 2.6mm,
Stacking height: 0.7mm, Power: 10A
PAGE:
8 OF 19
HIROSE ELECTRIC CO.,LTD
・Please design circuit of power supply pad without splitting current flow
Electric current might be concentrated in a certain circuit and cause over current
・Please design PWB layout properly so that fillet are properly formed.
The recommended PWB layout is designed so that the connector can be soldered to the PWB.
・Please comply with our recommended inner side of PWB pattern of receptacle
It may cause solder wicking.
・Please note pattern and the height of VIA hole.
In case there’s PWB pattern or VIA HOLE with too much height underneath the onnector,
there is a possibility to cause soldering failure.
Solder paste
Power supply part circuit
Inner side of PWB pattern
Nov.1.2021Copyright2021HIROSEELECTRICCO.,LTD.AllRightsReserved.

TITLE:
BM25 Series Guideline
ETAD-H1018-00
PRODUCT:
BATTERY BOARD TO FPC CONNECTOR,
Pitch: 0.4mm, Width: 2.6mm,
Stacking height: 0.7mm, Power: 10A
PAGE:
9 OF 19
HIROSE ELECTRIC CO.,LTD
1-2.d FPC design
・Please make sure to put a stiffener on the backside of the FPC.
It may cause the connector to peel-off or break.
【note】If using a thinner stiffener than our recommendation,
please contact and discuss with your Hirose contact window.
・When mounting the connector, please consider the bending of FPC by heating,
and use FPC with low risk of bending.
It may cause bending when heating.
・Please design the FPC to have a flexibility to absorb the displacement of the connecter
cased by fixing PWB and battery.
Recommended FPC Routing
Unrecommended FPC Routing
(Too short, not winding)
Recommended stiffener
FR- 4：t=0.3mm MIN
SUS：t=0.2mm MIN
Nov.1.2021Copyright2021HIROSEELECTRICCO.,LTD.AllRightsReserved.

TITLE:
BM25 Series Guideline
ETAD-H1018-00
PRODUCT:
BATTERY BOARD TO FPC CONNECTOR,
Pitch: 0.4mm, Width: 2.6mm,
Stacking height: 0.7mm, Power: 10A
PAGE:
10 OF 19
HIROSE ELECTRIC CO.,LTD
2.Notice for Mounting
2-1 Metal mask design
Make sure the latest specification when designing.
Notice：
If the soldering paste exceeds the recommended amount, there is a possibility of solder swelling.
【note】Please refer to “Solder paste swelling” on page 10.
Recommended stencil
thickness：0.10mm
Open ratio :
Signal contact:100%
Power contact:70%
Recommended stencil
thickness: 0.10mm
Open ratio:100%
Fig 2-1.(1) Recommended stencil layout of receptacle (BM25-4S/2-V)
Fig 2-1.(2) Recommended stencil layout of plug (BM25-4P/2-V)
Nov.1.2021Copyright2021HIROSEELECTRICCO.,LTD.AllRightsReserved.