CN208226850U - A kind of high-voltage switch power supply device and battery management system - Google Patents
A kind of high-voltage switch power supply device and battery management system Download PDFInfo
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- CN208226850U CN208226850U CN201820715236.7U CN201820715236U CN208226850U CN 208226850 U CN208226850 U CN 208226850U CN 201820715236 U CN201820715236 U CN 201820715236U CN 208226850 U CN208226850 U CN 208226850U
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Abstract
The utility model relates to battery technology field, a kind of high-voltage switch power supply device and battery management system are disclosed.The high-voltage switch power supply device includes: metal cavity and high-voltage switch power supply printed circuit board；The high-voltage switch power supply printed circuit board is arranged in the metal cavity；The high-voltage switch power supply printed circuit board includes metal area and circuit region, and the metal area is electrically connected with the metal cavity, the metal cavity ground connection；The circuit region includes the high-pressure section to intercouple and low-pressure section, and the high-voltage grounding wire of the high-pressure section connects the metal area by Y capacitance, and the low-voltage grounding wire of the low-pressure section connects the metal area.The utility model embodiment is in terms of existing technologies, it can inhibit electromagnetic interference of the high-voltage switch power supply itself to external radiation, also it can inhibit the electromagnetic interference conducted by conducting wire, the anti-interference ability of BMS be effectively improved, to guarantee system safe and stable operation.
Description
Technical field
The utility model relates to battery technology field, in particular to a kind of high-voltage switch power supply device and battery management system
System.
Background technique
In new-energy automobile, BMS (Battery Management System, battery management system) generally comprises high pressure
Electrical system and low-voltage electric system, the two are linked together by high-voltage switch power supply.High-voltage switch power supply is dynamic as vehicle
The important component of Force system is supplied to low pressure for the energy in high-voltage electric system in battery pack to be converted to low pressure
Controller in electrical system, to maintain the normal work of the controller.Since high-voltage switch power supply operating voltage is high, power
Greatly, switching frequency is high, because the high-voltage switch power supply in vehicle is easy to produce stronger electromagnetic interference at work.This not only can
The compliance rate of electric automobile whole electromagnetic compatibility index is influenced, and the electromagnetic interference that high-voltage switch power supply generates at work is not
Avoidable ground can be coupled in BMS, so that the normal work of the sensitive electricals system such as BMS in vehicle is influenced, to the safety of vehicle
Reliability service threatens.
Utility model content
The purpose of this utility model is to provide a kind of high-voltage switch power supply device and battery management systems, can be effectively
Inhibit the electromagnetic interference generated when high-voltage switch power supply work, to reduce the influence worked normally to BMS.
In order to solve the above technical problems, the embodiments of the present invention provides a kind of high-voltage switch power supply device, packet
It includes: metal cavity and high-voltage switch power supply printed circuit board；The high-voltage switch power supply printed circuit board is arranged in the metal
In cavity；The high-voltage switch power supply printed circuit board includes metal area and circuit region, the metal area and the metal cavity
Electrical connection, the metal cavity ground connection；The circuit region includes the high-pressure section to intercouple and low-pressure section, and the high pressure
Partial high-voltage grounding wire connects the metal area by Y capacitance, and the low-voltage grounding wire of the low-pressure section connects the metal
Area.
The embodiments of the present invention additionally provides a kind of battery management system, including high-voltage electric device, low tension
Device of air and high-voltage switch power supply device as described above；The high-voltage electric device is connected by the high-voltage switch power supply device
Connect the low-voltage electrical appliance.
The utility model embodiment in terms of existing technologies, firstly, high-voltage switch power supply printed circuit board is set
It sets in metal cavity, since metal cavity has the function of interference shielding well, this design can effectively inhibit
To the electromagnetic interference of external radiation when high-voltage switch power supply works；Secondly, metal is arranged on high-voltage switch power supply printed circuit board
Area's (metal area connects metal cavity, and is grounded by metal cavity), and make low on high-voltage switch power supply printed circuit board
The low-voltage grounding wire connection metal area of laminate section makes the high-voltage grounding wire of high-pressure section connect metal area by Y capacitance, low in this way
The electromagnetic interference that laminate section and high-pressure section generate will import metal area, and import metal cavity through metal area, finally import
In ground, to provide energy leakage path for the electromagnetic interference generated when high-voltage switch power supply work, height restrained effectively
The electromagnetic interference that the power supply that compresses switch is conducted by conducting wire.It can be seen that the utility model embodiment can inhibit high-voltage switch gear
Power supply itself can also inhibit the electromagnetic interference conducted by conducting wire to the electromagnetic interference of external radiation, effectively improve the anti-of BMS
Interference performance, to guarantee system safe and stable operation.
In addition, the metal area is located on the surrounding of the circuit region.The specific laying mode of one kind of metal area is provided.
In addition, the metal area is respectively the first metal area and the second metal area；First metal area is arranged described
The side of the low-pressure section is arranged in the side of high-pressure section, second metal area；The high-voltage grounding wire passes through the Y
First metal area described in capacitance connection, the low-voltage grounding wire connect second metal area.Another cloth of metal area is provided
If mode, the diversified laying mode of metal area facilitates the flexibility for promoting the utility model embodiment, so that this is practical
The scope of application of novel embodiment is more extensive.
Metal area is set in the side of high-pressure section and the side of low-pressure section respectively, high-pressure section and metal can be promoted
The convenience being routed between area and low-pressure area and metal area.In addition, the metal cavity includes: upper chamber cover and lower chamber lid；Institute
It is fixed together with the lower chamber lid to state upper chamber cover, forms a hollow cavity；The high-voltage switch power supply printed circuit board setting exists
In the hollow cavity.A kind of specific structure of metal cavity is provided, the setting of high-voltage switch power supply printed circuit board is being closed
Metal cavity in, be conducive to inhibit high-voltage switch power supply work when to external radiation electromagnetic interference.
In addition, the metal cavity is fixed together with the metal area by multiple conducting connecting parts.A kind of gold is provided
Belong to the fixed form of cavity and metal area.
In addition, the metal cavity is grounded by earth lead.A kind of specific earthing mode of metal cavity is provided.
In addition, the earth lead is fixed in the metal cavity by conducting connecting part；Alternatively, the earth lead
It is fixed in the metal cavity by welding.A kind of fixed form between metal cavity and earth lead is provided.
In addition, the conducting connecting part is metallic screw.A kind of concrete form of conducting connecting part is provided.
In addition, the earth lead is copper strips.A kind of concrete form of earth lead is provided.
Detailed description of the invention
Fig. 1 is the structural decomposition diagram according to the high-voltage switch power supply device of the utility model first embodiment；
Fig. 2 is the structural schematic diagram according to the high-voltage switch power supply printed circuit board of the utility model first embodiment；
Fig. 3 is the part route schematic layout pattern according to the high-voltage switch power supply of the utility model first embodiment；
Fig. 4 is the structural schematic diagram according to the high-voltage switch power supply printed circuit board of the utility model second embodiment；
Fig. 5 is the structural schematic diagram according to the battery management system of the utility model third embodiment.
Specific embodiment
It is practical new to this below in conjunction with attached drawing to keep the purpose of this utility model, technical solution and advantage clearer
Each embodiment of type is explained in detail.However, it will be understood by those skilled in the art that each in the utility model
In embodiment, in order to make the reader understand this application better, many technical details are proposed.But even if without these skills
The required guarantor of each claim of the application also may be implemented in art details and various changes and modifications based on the following respective embodiments
The technical solution of shield.
The first embodiment of the utility model is related to a kind of high-voltage switch power supply device.As shown in Figure 1, the high-voltage switch gear
Power supply device includes metal cavity 1 and high-voltage switch power supply printed circuit board 2, the high-voltage switch power supply printed circuit board 2 setting
In metal cavity 1.
Specifically, metal cavity 1 includes upper chamber cover 11 and lower chamber lid 12, the upper chamber cover 11 and lower chamber lid 2 are fixed on one
It rises, forms a hollow cavity, Switching Power Supply printed circuit board 2 is arranged in the hollow cavity.Since metal cavity 1 has well
Interference shielding function, therefore high-voltage switch power supply printed circuit board 2 is placed in metal cavity 1, high pressure can be effectively inhibited
To the electromagnetic interference of external radiation when Switching Power Supply works.
High-voltage switch power supply printed circuit board 2 may include metal area 21 and circuit region 22, wherein metal area 21 and wire chamber
Body 1 is electrically connected, and metal cavity 1 is grounded.As shown in Fig. 2, circuit region 22 may include the high-pressure section 221 to intercouple and low pressure
Part 222, wherein the high-voltage grounding wire 223 of high-pressure section 221 by Y capacitance connect metal area 21, low-pressure section 222 it is low
Crimping ground wire 224 is directly connected to metal area 21.In this way, high-pressure section 221 and high-voltage grounding wire 223, Y capacitance, metal area 21, gold
Belong to and is formed a high tension loop between cavity 1 and ground, and low-pressure section 222 and low-voltage grounding wire 224, metal area 21, metal
A low tension loop is formed between cavity 1 and ground.Above-mentioned high tension loop, low tension loop are just respectively high-pressure section 221, low pressure
The electromagnetic interference that part 222 generates provides a leakage path.When work, the electromagnetic interference that high-pressure section 221 generates can lead to
Above-mentioned high tension loop is crossed to import in ground, and the electromagnetic interference that low-pressure section 222 generates can be imported in ground by above-mentioned low tension loop.
In present embodiment, metal area 21 can be located on the surrounding of circuit region 22, and metal area is located on the surrounding of circuit region,
It is come into full contact with convenient for metal cavity and the ground wire of high-voltage switch power supply printed circuit board, increases the contact surface of ground wire and metal area
Product, is conducive to quickly introduce noise current in ground, to improve the anti-interference ability of system.
It is noted that metal cavity 1 and metal area 21 can be solid by multiple conducting connecting parts 3 in present embodiment
It is scheduled on together, which can be metallic screw, conducting resinl etc., and present embodiment is without limitation.Even with conduction
For fitting is metallic screw, multiple through-holes 4 can be arranged in present embodiment on metal area 21 in advance, and respectively in upper chamber cover 11
And it is also provided with through-hole 4 on the position of the corresponding multiple through-holes 4 of lower chamber lid 12, metallic screw is then sequentially passed through into upper chamber cover 11, gold
Belong to the through-hole 4 in area 21 and lower chamber lid 12, so that upper chamber cover 11, lower chamber lid 12 and metal area 21 are fixed together.
In addition, metal cavity 1 can be grounded by earth lead 5.In view of copper electric conductivity more preferably, the earth lead 5
Preferably copper strips, so without being limited thereto, in practical applications, which can also be with the metal wires such as aluminium, silver, present embodiment
It is without limitation.
Earth lead 5 can also be fixed in metal cavity 1 by conducting connecting part 3.If conducting connecting part 3 is conducting resinl,
Then directly earth lead 5 can be pasted on the upper chamber cover 11 or lower chamber lid 12 of metal cavity 1 by conducting resinl；If being conductively connected
Part 3 is metallic screw, then through-hole 4 can be arranged on earth lead 5, and a corresponding through-hole 4 is arranged in metal cavity 1, so
Metallic screw is set to pass through corresponding through-hole 4 in through-hole 4 and metal cavity 1 on earth lead 5 afterwards, so that earth lead 5 be consolidated
Due in metal cavity 1.It is fixed by metallic screw, is conducive to the stability and reliability that improve connection, and metallic screw is led
Good electrical property can make connected metal cavity 1 and earth lead 5 form a low-impedance resistive network circuit, be EMI
Noise current provides transmission path.In practical applications, earth lead 5 can also be fixed on metal cavity by welding
On 1, present embodiment is without limitation.
In addition, as shown in Fig. 2, circuit region 22 may include high-voltage connector 6, common mode inhibition device module in present embodiment
7, high-voltage switch power supply module 8, control module 9, low pressure connector 10 and isolation low tension switch power module 11 is isolated.Wherein,
High-voltage connector 6, common mode inhibition device module 7, the primary coil part that high-voltage switch power supply module 8 is isolated, isolation low tension switch
High-pressure section 221 is collectively formed in the Secondary section of power module 11.The secondary coil portion of high-voltage switch power supply module 8 is isolated
Point, the isolation primary coil part of low tension switch power module 11, control module 9, low pressure connector 10 low pressure is then collectively formed
Part 222.The high-voltage grounding wire 223 of high-pressure section 221 connects one end of Y capacitance, and the other end of Y capacitance connects metal area 21；
The low-voltage grounding wire 224 of low-pressure section 222 is also connected to metal area 21.
It should be noted that since the switching tube of Switching Power Supply is when turning on and off, voltage and current meeting change dramatically,
And due to the presence of ground wire common impedance, the voltage and current of acute variation can generate serious interference on ground wire.Therefore, exist
In 2 design process of high-voltage switch power supply printed circuit board, the design of ground wire is particularly important.
Specifically, as shown in figure 3, reducing influence of the current ripples to circuit in order to improve Electro Magnetic Compatibility, can making
The input terminal (i.e. high-voltage connector 6) of high voltage power supply first connects capacitor C1, then connects capacitor C2 through common mode inhibition device again, later
Again with high-voltage switch power supply module is isolated, isolation low tension switch power module etc. late-class circuits connect.Meanwhile capacitor C1, C2 and
The installation position of resistance R1 on circuit boards will be positioned as close to, that is, between the ground wire of capacitor C1 and the ground wire of capacitor C2
Line is short as much as possible, and the line between the ground wire of capacitor C2 and the ground wire of resistance R1 is also short as much as possible (referring in Fig. 3
1.).In addition, not lay other components between resistance R1 and common mode suppressor.
Since there is stray capacitances between circuit components and ground, in order to reduce the spoke of current loop to the maximum extent
It penetrates, the region that present embodiment should be such that " decoupling capacitor C3 → pwm chip → decoupling capacitor C3 " surrounds is (referring in attached drawing 3
3. 2. the region surrounded) area minimize.In addition, the ground wire of decoupling capacitor C3 and diode VD1 will link together, and
It needs as far as possible close to the GND of pwm chip.
In route (4. referring to the route in Fig. 3) where the primary pins of resistance R3, capacitor C5 and transformer T, there is height
The switching current of speed flows through, it will usually cause common mode interference.Therefore, to shorten resistance R3, capacitor C5 and transformer T as much as possible
The distance between primary pins.That is the ground wire of the primary pins of capacitor C5 and transformer T, will be connected to the ground wire of resistance R3
Together, and it is positioned as close to the GND of pwm chip.
In addition, the GND of pwm chip to link together with the ground wire of resistance R1 (referring in Fig. 3 5.).
The utility model embodiment in terms of existing technologies, firstly, high-voltage switch power supply printed circuit board is set
It sets in metal cavity, since metal cavity has the function of interference shielding well, this design can effectively inhibit
To the electromagnetic interference of external radiation when high-voltage switch power supply works；Secondly, metal is arranged on high-voltage switch power supply printed circuit board
Area's (metal area connects metal cavity, and is grounded by metal cavity), and make low on high-voltage switch power supply printed circuit board
The low-voltage grounding wire connection metal area of laminate section makes the high-voltage grounding wire of high-pressure section connect metal area by Y capacitance, low in this way
The electromagnetic interference that laminate section and high-pressure section generate will import metal area, and import metal cavity through metal area, finally import
In ground, to provide energy leakage path for the electromagnetic interference generated when high-voltage switch power supply work, height restrained effectively
The electromagnetic interference that the power supply that compresses switch is conducted by conducting wire.It can be seen that the utility model embodiment can inhibit high-voltage switch gear
Power supply itself can also inhibit the electromagnetic interference conducted by conducting wire to the electromagnetic interference of external radiation, effectively improve the anti-of BMS
Interference performance, to guarantee system safe and stable operation.
The second embodiment of the utility model is related to a kind of high-voltage switch power supply device.Second embodiment is real with first
It is roughly the same to apply mode, be in place of the main distinction: in the first embodiment, metal area 21 is located on the four of circuit region 222
Week.And in the utility model second embodiment, metal area 21 is then divided into the first metal area and the second metal area.
As shown in figure 4, the side of high-pressure section 221, high-voltage grounding wire is arranged in the first metal area (21-A in such as Fig. 4)
223 connect the first metal area by Y capacitance；The side of low-pressure section 222 is arranged in second metal area (21-B in such as Fig. 4),
Low-voltage grounding wire 224 is directly connected to the second metal area 212.It is noted that in practical applications, can flexibly set as needed
Structure and position, the present embodiment for counting metal area 21 are without limitation.
In addition, it is necessary to explanation, first embodiment is to pass through conductive connection between metal area 21 and metal cavity 1
It is illustrated, but is not limited thereto for the realization electrical connection of part 3, it in practical applications, can also be in upper chamber cover 11 or cavity of resorption
Lug boss towards metal area 21 is set on the position of the corresponding metal area 21 of lid 12, and the lug boss is made to support metal area 21, from
And realize the electric connection between metal area 21 and metal cavity 1.
Present embodiment provides another laying mode of metal area, Yi Jijin for first embodiment
Belong to area and realizes the another way being electrically connected with metal cavity.
The utility model third embodiment is related to a kind of battery management system.As shown in figure 5, the battery management system packet
It includes: high-voltage electric device 12, low-voltage electrical appliance 14 and the high-voltage switch gear as described in first embodiment or second embodiment
Power supply device 13；The high-voltage electric device 12 connects low-voltage electrical appliance 14 by high-voltage switch power supply device 13.
It will be understood by those skilled in the art that the respective embodiments described above are to realize the specific implementation of the utility model
Example, and in practical applications, can to it, various changes can be made in the form and details, without departing from the spirit of the utility model
And range.
Claims (10)
1. a kind of high-voltage switch power supply device characterized by comprising metal cavity and high-voltage switch power supply printed circuit board；
The high-voltage switch power supply printed circuit board is arranged in the metal cavity；
The high-voltage switch power supply printed circuit board includes metal area and circuit region, and the metal area is electrically connected with the metal cavity
It connects, the metal cavity ground connection；
The circuit region includes the high-pressure section to intercouple and low-pressure section, and the high-voltage grounding wire of the high-pressure section passes through
Y capacitance connects the metal area, and the low-voltage grounding wire of the low-pressure section connects the metal area.
2. high-voltage switch power supply device according to claim 1, which is characterized in that the metal area is located on the circuit
The surrounding in area.
3. high-voltage switch power supply device according to claim 1, which is characterized in that the metal area is respectively the first metal
Area and the second metal area；The side of the high-pressure section is arranged in first metal area, and second metal area is arranged in institute
State the side of low-pressure section；
The high-voltage grounding wire connects first metal area, the low-voltage grounding wire connection described second by the Y capacitance
Metal area.
4. high-voltage switch power supply device according to claim 1, which is characterized in that the metal cavity includes: upper chamber cover
And lower chamber lid；The upper chamber cover is fixed together with the lower chamber lid, forms a hollow cavity；
The high-voltage switch power supply printed circuit board is arranged in the hollow cavity.
5. high-voltage switch power supply device according to claim 1, which is characterized in that the metal cavity and the metal area
It is fixed together by multiple conducting connecting parts.
6. high-voltage switch power supply device according to claim 1, which is characterized in that the metal cavity passes through earth lead
Ground connection.
7. high-voltage switch power supply device according to claim 6, which is characterized in that the earth lead passes through conductive connection
Part is fixed in the metal cavity；
Alternatively, the earth lead is fixed on by welding in the metal cavity.
8. the high-voltage switch power supply device according to claim 5 or 7, which is characterized in that the conducting connecting part is metal
Screw.
9. high-voltage switch power supply device according to claim 6 or 7, which is characterized in that the earth lead is copper strips.
10. a kind of battery management system, which is characterized in that including high-voltage electric device, low-voltage electrical appliance and such as claim 1
To high-voltage switch power supply device described in any one of 9；
The high-voltage electric device connects the low-voltage electrical appliance by the high-voltage switch power supply device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820715236.7U CN208226850U (en) | 2018-05-14 | 2018-05-14 | A kind of high-voltage switch power supply device and battery management system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820715236.7U CN208226850U (en) | 2018-05-14 | 2018-05-14 | A kind of high-voltage switch power supply device and battery management system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208226850U true CN208226850U (en) | 2018-12-11 |
Family
ID=64508300
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201820715236.7U Active CN208226850U (en) | 2018-05-14 | 2018-05-14 | A kind of high-voltage switch power supply device and battery management system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN208226850U (en) |
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2018
- 2018-05-14 CN CN201820715236.7U patent/CN208226850U/en active Active
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Effective date of registration: 20220125 Address after: 352100 science and technology building, No. 2, Xingang Road, Zhangwan Town, Jiaocheng District, Ningde City, Fujian Province Patentee after: Ningde Shidai Runzhi Software Technology Co.,Ltd. Address before: 352100 Xingang Road, Zhangwan Town, Jiaocheng District, Ningde, Fujian 2 Patentee before: Contemporary Amperex Technology Co.,Ltd. |