CN206540956U - A kind of voltage acquisition system for battery pack framework - Google Patents
A kind of voltage acquisition system for battery pack framework Download PDFInfo
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- CN206540956U CN206540956U CN201720249879.2U CN201720249879U CN206540956U CN 206540956 U CN206540956 U CN 206540956U CN 201720249879 U CN201720249879 U CN 201720249879U CN 206540956 U CN206540956 U CN 206540956U
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- acquisition
- isolation module
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Abstract
The utility model provides a kind of voltage acquisition system for battery pack framework, the battery pack is composed in series by one or more battery module, battery modules are made up of multiple cells, and each battery modules carries out voltage acquisition by the voltage acquisition module connected one to one, including：First high_voltage isolation module, the second high_voltage isolation module and primary processor.Each voltage acquisition module is according to passing through I2C buses are sequentially connected according to chrysanthemum chain pattern head and the tail, and the voltage acquisition module positioned at end passes through I2C buses are connected with the input of the first high_voltage isolation module, and the voltage acquisition module positioned at head end passes through I2C buses are connected with the input of the second high_voltage isolation module.Primary processor obtains the voltage of each cell by the first high_voltage isolation module and the second high_voltage isolation module.When the existing System of voltage acquisition of the utility model communicates disconnection between voltage acquisition chip, it is impossible to the problem of accurately obtaining monomer voltage, high battery management system framework layout can be made more reasonable.
Description
Technical field
The utility model is related to electrokinetic cell voltage acquisition field, more particularly to a kind of voltage acquisition system for battery pack frame
Structure.
Background technology
Battery management system is the core component of electric automobile, and it is mainly used in monomer electricity in monitoring electrokinetic cell bag
The voltage in pond and the total voltage of electrokinetic cell bag, therefore, battery management system will be directly affected for battery voltage collection
Combination property.The current collection to each monomer battery voltage value in battery pack, which is typically powered, presses acquisition chip to enter cell
Row voltage acquisition, and each voltage acquisition chip is passed through into I2C buses are sequentially connected according to chrysanthemum chain pattern head and the tail, positioned at end
Voltage acquisition chip passes through I2The I of C buses and high_voltage isolation module2After C-terminal mouthful connection, then with the core in battery management system
Component primary processor realizes communication.But this framework is in the I of some voltage acquisition chip2The interruption of C order circuits, will lead
Cause the interruption of whole high pressure information circuits, just occur the information of voltage before the breakpoint be can not pass back to isolation module and
Primary processor, the loop that can cause whole communication system is abnormal, and battery management system can not gather accurate monomer voltage,
And then influence the safety of power vehicle.
Utility model content
The utility model provides a kind of voltage acquisition system for battery pack framework, solves existing batteries monomer voltage acquisition and exists
When communicating disconnection between voltage acquisition chip, it is impossible to accurately obtain monomer voltage, the problem of influence electrokinetic cell is safe can make height
Battery management system framework layout is more reasonable.
To realize object above, the utility model provides following technical scheme：
A kind of voltage acquisition system for battery pack framework, the battery pack is composed in series by one or more battery module, institute
State battery modules to be made up of multiple cells, each described battery modules is carried out by the voltage acquisition module connected one to one
Voltage acquisition, including：First high_voltage isolation module, the second high_voltage isolation module and primary processor；
Each described voltage acquisition module is according to passing through I2C buses are sequentially connected according to chrysanthemum chain pattern head and the tail, positioned at end
The voltage acquisition module at end passes through I2C buses are connected with the input of the first high_voltage isolation module, positioned at the voltage of head end
Acquisition module passes through I2C buses are connected with the input of the second high_voltage isolation module；
The first input end of the primary processor is connected with the output end of the first high_voltage isolation module, the main process task
Second input of device is connected with the output end of the second high_voltage isolation module；
The primary processor obtains each list by the first high_voltage isolation module and the second high_voltage isolation module
The voltage of body battery.
It is preferred that, the voltage acquisition module includes：AD AD conversion units, Acquisition Circuit, acquisition chip；
The output end of the Acquisition Circuit is connected with the input of the AD AD conversion units, the acquisition chip it is defeated
Enter end with the output end of the AD AD conversion units to be connected；
The Acquisition Circuit is used to carry out each cells of the battery modules monomer voltage collection, and by each
Monomer voltage is sent to the AD AD conversion units.
It is preferred that, the acquisition chip includes I2C serial ports, the corresponding acquisition chip of each described battery modules passes through described
I2C serial ports is connected.
It is preferred that, the voltage acquisition module also includes：Voltage balancing module；
The voltage balancing module is serially connected in the two ends of cell, when battery pack is charged, if the battery
The voltage of cell in module is inconsistent, and the acquisition chip controls the voltage balancing module to consume the cell
Power so that the monomer voltage in battery modules is consistent.
It is preferred that, the voltage balancing module includes：Discharge resistance and switch element；
The discharge resistance and the switch element are serially connected in the two ends of cell, the control end of the switch element with
The output end of the acquisition chip is connected, and when battery pack charges, the acquisition chip is according to the monomer voltage controlling switch
Element carries out power consumption to corresponding cell.
It is preferred that, the first high_voltage isolation module and the second high_voltage isolation module are high_voltage isolation chip.
It is preferred that, the primary processor includes：Numbering acquiring unit and reading control unit；
The numbering acquiring unit is used to receive the battery modules numbering that each described acquisition chip is sent；
The control unit that reads judges whether all to obtain each battery modules pair in battery pack according to the numbering
The numbering answered, in this way, then the reading control unit obtains each cell by the first high_voltage isolation module
Voltage, otherwise, it is described reading control unit simultaneously obtained by the first high_voltage isolation module and second isolation module
Take the voltage of each cell.
The utility model provides a kind of voltage acquisition system for battery pack framework, and voltage acquisition module uses the first high_voltage isolation
Module and the second high_voltage isolation module transmit the monomer voltage of battery pack to primary processor respectively.Solve existing batteries monomer electricity
When pressure collection communicates disconnection between voltage acquisition chip, it is impossible to accurately obtain monomer voltage, asking for electrokinetic cell safety is influenceed
Topic, can make high battery management system framework layout more reasonable.
Brief description of the drawings
, below will be attached to what is used required in embodiment in order to illustrate more clearly of specific embodiment of the utility model
Figure is briefly described.
Fig. 1：It is a kind of voltage acquisition system for battery pack configuration diagram that the utility model is provided；
Fig. 2：It is a kind of structural representation for high_voltage isolation module that the utility model is provided.
Embodiment
In order that those skilled in the art more fully understand the scheme of the utility model embodiment, below in conjunction with the accompanying drawings and
Embodiment is described in further detail to the utility model embodiment.
For in current battery voltage acquisition, if the communication between acquisition chip disconnects, it is impossible to accurately obtain monomer
Voltage.The utility model provides a kind of voltage acquisition system for battery pack framework, and voltage acquisition module uses the first high_voltage isolation mould
Block and the second high_voltage isolation module transmit the monomer voltage of battery pack to primary processor respectively.Solve existing batteries monomer voltage
When collection communicates disconnection between voltage acquisition chip, it is impossible to accurately obtain monomer voltage, the problem of electrokinetic cell is safe is influenceed,
High battery management system framework layout can be made more reasonable.
As shown in figure 1, a kind of voltage acquisition system for battery pack framework, the battery pack is by one or more battery module string
Joint group is into the battery modules are made up of multiple cells, and each described battery modules is adopted by the voltage connected one to one
Collect module and carry out voltage acquisition, including：First high_voltage isolation module, the second high_voltage isolation module and primary processor.Described in each
Voltage acquisition module is according to passing through I2C buses are sequentially connected according to chrysanthemum chain pattern head and the tail, the voltage acquisition module positioned at end
Pass through I2C buses are connected with the input of the first high_voltage isolation module, and the voltage acquisition module positioned at head end is total by I2C
Line is connected with the input of the second high_voltage isolation module.The first input end of the primary processor and first high pressure every
Output end from module is connected, the second input of the primary processor and the output end phase of the second high_voltage isolation module
Even.The primary processor obtains each cell by the first high_voltage isolation module and the second high_voltage isolation module
Voltage.
Specifically, primary processor obtains the voltage of each cell by two-way high_voltage isolation module, if wherein two
When communication connection between individual voltage acquisition module disconnects, primary processor can obtain phase respectively from the voltage acquisition module of head and end
Close the voltage of cell.If the communication connection between voltage acquisition module is not turned off, the signal of whole order circuit is just
Can be from battery modules m to battery modules m-1 until the voltage acquisition module of Section 1 battery modules passes through the first high_voltage isolation mould
Block is sent to primary processor.
Further, the voltage acquisition module includes：AD AD conversion units, Acquisition Circuit, acquisition chip.The collection
The output end of circuit is connected with the input of the AD AD conversion units, the input of the acquisition chip and the AD moduluses
The output end of converting unit is connected.The Acquisition Circuit is used to carry out monomer voltage to each cell of the battery modules
Collection, and each monomer voltage is sent to the AD AD conversion units.
The acquisition chip includes I2C serial ports, the corresponding acquisition chip of each described battery modules passes through the I2C serial ports
It is connected.
The voltage acquisition module also includes：Voltage balancing module；The voltage balancing module is serially connected in cell
Two ends, when battery pack is charged, if the voltage of the cell in the battery modules is inconsistent, the acquisition chip
The voltage balancing module is controlled to consume the power of the cell, so that the monomer voltage in battery modules is consistent.
Further, the voltage balancing module includes：Discharge resistance and switch element；The discharge resistance and the switch
Element is serially connected in the two ends of cell, and the control end of the switch element is connected with the output end of the acquisition chip, in electricity
During the group charging of pond, the acquisition chip carries out power to corresponding cell according to the monomer voltage controlling switch element and disappeared
Consumption.
In actual applications, the first high_voltage isolation module and the second high_voltage isolation module are high_voltage isolation core
Piece.As shown in Fig. 2 the clock signal clk and data-signal SDA that are exported by acquisition chip are separately input into high_voltage isolation chip
Pin SCL2 and pin SDA2, carries out high_voltage isolation output, the pin SCL1 and pin SDA1 of high_voltage isolation chip are exported respectively
The clock signal corresponding with clock signal and data-signal is to primary processor.
The primary processor includes：Numbering acquiring unit and reading control unit.The numbering acquiring unit is used to receive
The battery modules numbering that each described acquisition chip is sent.The reading control unit judges whether all to obtain according to the numbering
The corresponding numbering of each battery modules in battery pack is obtained, in this way, then the reading control unit is high by described first
Pressure isolation module obtains the voltage of each cell, otherwise, the reading control unit simultaneously by first high pressure every
From the voltage that module and second isolation module obtain each cell.
Specifically, primary processor obtains monomer voltage information and 1 can from top to bottom obtained from battery modules m to battery modules
Take, can also from bottom to top be obtained from battery modules 1 to battery modules m.Meanwhile, if logical between two battery modules wherein
After news open circuit, the voltage of corresponding cell can be still obtained from the battery modules of head and end, whole list has been effectively ensured
The security and reliability of bulk voltage collection.
It can be seen that, the utility model provides a kind of voltage acquisition system for battery pack framework, and voltage acquisition module is high using first
Isolation module and the second high_voltage isolation module is pressed to transmit the monomer voltage of battery pack to primary processor respectively.Solve existing battery pack
When monomer voltage collection communicates disconnection between voltage acquisition chip, it is impossible to accurately obtain monomer voltage, influence electrokinetic cell peace
Full the problem of, high battery management system framework layout can be made more reasonable.
Construction of the present utility model, feature and action effect is described in detail according to diagrammatically shown embodiment above, with
Upper described is only preferred embodiment of the present utility model, but the utility model is not to limit practical range shown in drawing, it is every according to
According to the made change of conception of the present utility model, or the equivalent embodiment of equivalent variations is revised as, still without departing from specification and figure
, all should be in protection domain of the present utility model when showing covered spirit.
Claims (7)
1. a kind of voltage acquisition system for battery pack framework, the battery pack is composed in series by one or more battery module, described
Battery modules are made up of multiple cells, and each described battery modules carries out electricity by the voltage acquisition module connected one to one
Pressure collection, it is characterised in that including：First high_voltage isolation module, the second high_voltage isolation module and primary processor；
Each described voltage acquisition module is according to passing through I2C buses are sequentially connected according to chrysanthemum chain pattern head and the tail, the electricity positioned at end
Pressure acquisition module passes through I2C buses are connected with the input of the first high_voltage isolation module, positioned at the voltage acquisition mould of head end
Block passes through I2C buses are connected with the input of the second high_voltage isolation module；
The first input end of the primary processor is connected with the output end of the first high_voltage isolation module, the primary processor
Second input is connected with the output end of the second high_voltage isolation module；
The primary processor obtains each monomer electricity by the first high_voltage isolation module and the second high_voltage isolation module
The voltage in pond.
2. framework according to claim 1, it is characterised in that the voltage acquisition module includes：AD AD conversion units,
Acquisition Circuit, acquisition chip；
The output end of the Acquisition Circuit is connected with the input of the AD AD conversion units, the input of the acquisition chip
It is connected with the output end of the AD AD conversion units；
The Acquisition Circuit is used to carry out each cells of the battery modules monomer voltage collection, and by each monomer
Voltage is sent to the AD AD conversion units.
3. framework according to claim 2, it is characterised in that the acquisition chip includes I2C serial ports, each described battery
The corresponding acquisition chip of module passes through the I2C serial ports is connected.
4. framework according to claim 3, it is characterised in that the voltage acquisition module also includes：Voltage balancing module；
The voltage balancing module is serially connected in the two ends of cell, when battery pack is charged, if the battery modules
The voltage of interior cell is inconsistent, and the acquisition chip controls the work(of the voltage balancing module consumption cell
Rate, so that the monomer voltage in battery modules is consistent.
5. framework according to claim 4, it is characterised in that the voltage balancing module includes：Discharge resistance and switch
Element；
The discharge resistance and the switch element are serially connected in the two ends of cell, the control end of the switch element with it is described
The output end of acquisition chip is connected, and when battery pack charges, the acquisition chip is according to the monomer voltage controlling switch element
Power consumption is carried out to corresponding cell.
6. framework according to claim 5, it is characterised in that the first high_voltage isolation module and second high pressure every
It is high_voltage isolation chip from module.
7. framework according to claim 6, it is characterised in that the primary processor includes：Numbering acquiring unit and reading
Control unit；
The numbering acquiring unit is used to receive the battery modules numbering that each described acquisition chip is sent；
The control unit that reads judges whether that each battery modules in all acquisition battery packs are corresponding according to the numbering
The numbering, it is in this way, then described to read the electricity that control unit obtains each cell by the first high_voltage isolation module
Pressure, otherwise, the reading control unit are obtained by the first high_voltage isolation module and the second high_voltage isolation module simultaneously
Take the voltage of each cell.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201720249879.2U CN206540956U (en) | 2017-03-15 | 2017-03-15 | A kind of voltage acquisition system for battery pack framework |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720249879.2U CN206540956U (en) | 2017-03-15 | 2017-03-15 | A kind of voltage acquisition system for battery pack framework |
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| CN201720249879.2U Expired - Fee Related CN206540956U (en) | 2017-03-15 | 2017-03-15 | A kind of voltage acquisition system for battery pack framework |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108802473A (en) * | 2018-03-05 | 2018-11-13 | 博科能源系统(深圳)有限公司 | Battery pack cascade voltage acquisition system and more battery pack cascade voltage acquisition systems |
| CN109507607A (en) * | 2018-10-29 | 2019-03-22 | 国家电网有限公司 | Portable storage battery group voltage acquisition instrument |
| CN110661305A (en) * | 2018-06-28 | 2020-01-07 | 宁德时代新能源科技股份有限公司 | Battery pack management system and control method thereof |
| CN110829516A (en) * | 2019-10-10 | 2020-02-21 | 威睿电动汽车技术(宁波)有限公司 | Battery management topology framework, battery management method and battery management system |
| CN110967648A (en) * | 2019-02-26 | 2020-04-07 | 宁德时代新能源科技股份有限公司 | Sampling circuit and control method thereof |
| CN111725574A (en) * | 2019-03-20 | 2020-09-29 | 立锜科技股份有限公司 | Battery system, battery module and battery control circuit therein |
-
2017
- 2017-03-15 CN CN201720249879.2U patent/CN206540956U/en not_active Expired - Fee Related
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108802473A (en) * | 2018-03-05 | 2018-11-13 | 博科能源系统(深圳)有限公司 | Battery pack cascade voltage acquisition system and more battery pack cascade voltage acquisition systems |
| CN110661305A (en) * | 2018-06-28 | 2020-01-07 | 宁德时代新能源科技股份有限公司 | Battery pack management system and control method thereof |
| US11031789B2 (en) | 2018-06-28 | 2021-06-08 | Contemporary Amperex Technology Co., Limited | Battery pack management system and control method thereof |
| CN109507607A (en) * | 2018-10-29 | 2019-03-22 | 国家电网有限公司 | Portable storage battery group voltage acquisition instrument |
| CN110967648A (en) * | 2019-02-26 | 2020-04-07 | 宁德时代新能源科技股份有限公司 | Sampling circuit and control method thereof |
| CN111725574A (en) * | 2019-03-20 | 2020-09-29 | 立锜科技股份有限公司 | Battery system, battery module and battery control circuit therein |
| CN110829516A (en) * | 2019-10-10 | 2020-02-21 | 威睿电动汽车技术(宁波)有限公司 | Battery management topology framework, battery management method and battery management system |
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| CF01 | Termination of patent right due to non-payment of annual fee |