CN109390983A - Battery pack and detection method for battery pack - Google Patents
Battery pack and detection method for battery pack Download PDFInfo
- Publication number
- CN109390983A CN109390983A CN201710654063.2A CN201710654063A CN109390983A CN 109390983 A CN109390983 A CN 109390983A CN 201710654063 A CN201710654063 A CN 201710654063A CN 109390983 A CN109390983 A CN 109390983A
- Authority
- CN
- China
- Prior art keywords
- voltage
- battery pack
- series unit
- series
- difference
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/0013—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries acting upon several batteries simultaneously or sequentially
- H02J7/0014—Circuits for equalisation of charge between batteries
- H02J7/0016—Circuits for equalisation of charge between batteries using shunting, discharge or bypass circuits
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Secondary Cells (AREA)
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
Abstract
The invention discloses a kind of battery pack and for the detection method of the battery pack, battery pack includes: the series unit that more than one is connected in series each other；Voltage detection module, for detecting the voltage of multiple series units respectively；Controller increases the brownout threshold of battery pack when voltage difference is more than preset difference value for receiving voltage detection module voltage detected and calculating the voltage difference between the series unit in preset time.The invention has the beneficial effects that reducing battery pack the risk of reversely charging occurs when for electric tool power supply, the safety of battery pack is improved.
Description
Technical field
The present invention relates to a kind of battery pack and for the detection method of battery pack.
Background technique
Battery pack is always to restrict the key link of Wireless Power Tools development as the power resources of Wireless Power Tools,
Previous battery pack often only has 30V output voltage below, they are when driving powerful electric tool, often
Cause to be short of power the problem of cruising ability difference.
When battery pack is adapted to electric tool progress heavy load operating condition work, when the battery core in battery pack occurs unbalanced,
Easily there is reversely charging in the weak battery core of electricity in battery pack, generates security risk.
Summary of the invention
In order to achieve the above objectives, the present invention adopts the following technical scheme that:
A kind of battery pack, comprising: more than one series unit being connected in series each other；Voltage detection module, for distinguishing
Detect the voltage of multiple series units；Controller, for receiving voltage detection module voltage detected and calculating preset time
Voltage difference between interior series unit increases the brownout threshold of battery pack when voltage difference is more than preset difference value.
Further, controller calculates the voltage difference between the series unit in preset time, and voltage difference is multiple strings
The maximum value of voltage difference between receipts or other documents in duplicate member.
Further, controller reduces preset time when voltage difference is more than preset difference value.
Further, before voltage difference, compare the voltage and brownout threshold of series unit.
Further, series unit includes two battery cores in parallel.
A kind of detection method for battery pack, battery pack include the Series Sheet that more than one is connected in series each other
Member, method include: to detect the voltage of series unit；Calculate the voltage difference of series unit in preset time；It is super in voltage difference
The brownout threshold of battery pack is improved when crossing preset difference value.
Further, the maximum voltage value in voltage difference of the voltage difference between multiple series units.
Further, reduce preset time when voltage difference is more than preset difference value.
Further, further includes: compare the voltage value and brownout threshold of series unit.
Further, further includes: compare the voltage value and brownout threshold of series unit；If voltage difference is greater than brownout threshold
Calculate the voltage difference of series unit in preset time.
The invention has the beneficial effects that reducing battery pack the risk of reversely charging occurs when for electric tool power supply, improve
The safety of battery pack.
Detailed description of the invention
Fig. 1 is the schematic block diagram of battery pack one embodiment；
Fig. 2 is in battery pack for realizing the schematic block diagram of one embodiment of current detection section；
Fig. 3 is the connection schematic diagram of battery pack and power device；
Fig. 4 is the schematic diagram that detection module is connect with battery core unit in battery pack；
Fig. 5 is the flow chart of the battery packet inspection method of one embodiment；
Fig. 6 is the flow chart of the battery packet inspection method of another embodiment；
Fig. 7 is the flow chart of the battery packet inspection method of another embodiment.
Specific embodiment
Specific introduce is made to the present invention below in conjunction with the drawings and specific embodiments.
Shown in referring to figs. 1 to Fig. 3, battery pack 100 specifically includes that battery core group 11, terminal module 12, thermal module 13, electricity
Press detection module 14, communication module 15 and the controller 16 for controlling them.
Battery core group 11 includes: more than one series unit 111.When the number of series unit 111 is more than or equal to 2, no
It is connected in series between series unit 111, the generally battery core group 11 that they are constituted.
One series unit 111 includes: more than one battery core.The number of battery core in the same series unit 111
When more than or equal to 2, it is connected in parallel between different battery cores and constitutes a series unit 111.As an implementation, such as Fig. 2
It is shown, it include two battery cores in parallel in a series unit 111.
Terminal module 12 is respectively constituted and is electrically connected with battery core group 11 and controller 16, is equipped with and is connected for constituting with the external world
To realize 100 negative terminal of 100 positive terminal of battery pack and battery pack of electric energy or signal transmitting.It is electricity consumption in battery pack 100
When device 200 is powered, terminal module 12 makes the battery core in battery core group 11 be in discharge condition, while also can be in battery pack 100
Other modules of portion and component provide electric energy.
Thermal module 13 includes: temperature element 131 and temperature signal module 132, and wherein temperature element 131 is for detecting electricity
The internal temperature of pond packet 100.Position of the inside close to battery core of battery pack 100 is arranged in temperature element 131, can detect
To the variation of battery core temperature.Specifically, temperature element 131 can be thermistor, such as NTC thermistor.
Temperature signal module 132 is electrically connected with temperature element 131 and controller 16 respectively, can be by temperature element 131
Testing result is sent to controller 16 and the control by controller 16.Temperature signal module 132 is equipped with and is used for and external temperature
The 100 temperature terminal T of battery pack of terminal electrical connection.
Voltage detection module 14 is used to detect the voltage value of each series unit 111 in battery core group 11, voltage detection module
14 are electrically connected with battery core group 11 and the composition of controller 16 respectively.
As one kind of embodiment, voltage detection module detects the voltage value of every two series unit respectively, namely every
The series unit of two adjacent series units as a whole detects global voltage, and controller is examined according to voltage detection module
The voltage signal of the whole series unit measured calculates the voltage value of whole series unit, to realize the monitoring to battery pack.
Voltage detection module 14 detects the voltage signal in battery core group 11 and voltage signal is transferred to controller 16, controls
Device 16 calculates the voltage value of each series unit 111 according to the voltage signal that voltage detection module 14 inputs, to realize to battery
The monitoring of the voltage security of packet 100.
100 communication module 15 of battery pack is electrically connected for realizing the exchange of data or signal with the composition of controller 16.Battery
Wrap 100 communication modules 15 can be used hardware connection realize data transmission can also be used wireless connection realize data transmission.Due to
The voltage with higher of battery pack 100 and output power, therefore when being connect with power device 200, to reliability and safety
It is more demanding.
As shown in Figure 1 to Figure 3, as one kind of embodiment, hardware is used between battery pack 100 and power device 200
The mode of connection realizes the transmitting of electric energy and data.Communication module 15 is equipped with communication terminal D.In battery pack 100 and electric tool
When assembly, communication terminal D can constitute physical connection with terminal corresponding in electric tool.
Controller 16 is mainly used for realizing the functions such as logical operation, Process flowchart.It can be to each group in battery pack 100
Part and module are controlled, and guarantee the safety when charging of battery pack 100, electric discharge.
Voltage detection module 14 is mainly introduced below.Voltage detection module 14 is mainly used for detecting series unit 111 respectively
The voltage signal of high-voltage end.Specifically, voltage detection module 14 includes detection circuit 143, one end of detection circuit 143 is connected to
The high-voltage end of series unit 111, the other end are connected to controller 16.
Multiple series units 111 are detected in order to realize, voltage detection module 14 further includes timesharing module 146.Timesharing
The effect of module 146 is control detection circuit 143, and at least can control detection circuit 143 makes its both ends disconnect or make it
Both ends conducting.
Referring to shown in Fig. 2, multiple detection circuits 143 are connected, and then pass through same route access controller 16.Even
The multiple detection circuits 143 being connected together are used as a detection group 141, multiple detection circuits 143 in a detection group 141
The voltage signal of acquisition is sent to controller 16 by same bus under the control of same timesharing module 146.Timesharing module
146 are electrically connected with controller 16, and controller 16 can control timesharing module 146, and then indirectly control multiple detection circuits
143 timesharing conducting.
Generally there are multiple series units 111 in battery core group 11, and in order to realize comprehensive detection, voltage detection module 14 is set
There are multiple detection circuits 143.Controller 16 receives the voltage signal from multiple detection circuits 143 simultaneously.
Further, include an on-off element 144 in detection circuit 143, the on-off element 144 include two connecting pins and
One control terminal (not shown), two of them connecting pin are divided into: being connected to the test side 144a of series unit 111 and for connecting
It is connected to the output end of controller 16.Control terminal receives the signal of timesharing module 146 and controls two connecting pins of on-off element and leads
On-off is opened.
Referring to shown in Fig. 2, the on-off element 144 in detection circuit 143 in same detection group 141 is ultimately connected to
Same place is then attached to controller 16.
Further include a divider resistance 145 in detection circuit 143, divider resistance 145 both can as shown in Fig. 2 that
Sample is connected to 144 side output end 144b of on-off element, also can connect in the 144 test side side 144a of on-off element.
Control of the controller 16 when battery pack 100 is powered to power device 200 is illustrated below in conjunction with Fig. 1 and Fig. 2
Process.
Refering to what is shown in Fig. 2, the battery core in battery core group 11 is constantly discharged outward when battery pack 100 is discharged, each Series Sheet
The situation uneven there may be electric discharge of member 111, to guarantee the Electrical Safety in 100 discharge process of battery pack to avoid battery core mistake
It puts, the brownout threshold for preventing voltage over-discharge is stored in controller 16.
Specifically, voltage detection module 14 detects the voltage signal of each series unit 111 respectively, controller 16 is received
Voltage signal from each series unit 111 detected of voltage detection module 14, and by the voltage of each series unit 111
Signal is made comparisons with brownout threshold, when the voltage value of one of them series unit 111 is more than brownout threshold, disconnects battery pack
100 with the electric connection of power device 200.
For the electric connection for cutting off battery pack 100 and power device 200, terminal module 12 further includes switch unit, switch
Unit and controller 16 are electrically connected, and when one voltage value in series unit 111 is more than voltage threshold, controller 16 is defeated
The control signal that switch unit of sening as an envoy to disconnects is so that battery pack 100 disconnects the connection with electric tool, so that battery pack 100
No longer externally electric discharge, to guarantee the Electrical Safety of battery pack 100.
When the voltage value of series unit 111 is less than brownout threshold, in the series unit 111 in battery pack 100 extremely
It less include the battery core of two sections parallel connection, when this two economize on electricitys core discharges unbalanced, since battery core is connected in parallel, a battery core wherein
When over-discharge occurs in unit, the voltage for the series unit 111 that voltage detection module 14 detects will generally maintain constant in a short time.
Battery pack 100 continues to discharge, it will so that such as there is flowing backward at the harm in the battery core in series unit 111, damage over-discharge originally
Battery core.
Refering to what is shown in Fig. 4, voltage detection module detect respectively it is every two economize on electricity core unit voltage, controller 16 further by
It is configured to calculate the voltage difference of the voltage signal of each series unit 111 two-by-two within a preset time, if voltage difference is more than pre-
If when difference, the output of controller 16 makes the increased control signal of brownout threshold.
With reference to a kind of charging method for battery pack 100 shown in fig. 5, comprising the following steps:
S401. the voltage value Ui of each series unit 111 is detected；
S402. judge whether the voltage value Ui of each series unit 111 is greater than brownout threshold U1；If then going to step S403；
Otherwise step S407 is gone to；
S403. the voltage difference △ Ui between each series unit 111 is calculated；
S404. more each voltage difference size obtains maximum voltage difference △ Umax;
S405. judge whether maximum voltage difference is greater than preset difference value, if then continuing to execute S406；If otherwise return step
S402;
S406. brownout threshold is improved, step S402 is continued to execute；
S407. the electric connection of battery pack and electric tool is disconnected.
With reference to another charging method for being used for battery pack 100 shown in fig. 6, comprising the following steps:
S501. the voltage value Ui of each series unit 111 is detected；
S502. judge whether the voltage value Ui of each series unit 111 is greater than brownout threshold U1；If then going to step S503；
Otherwise step S508 is gone to；
S503. the voltage difference △ Ui of the series unit 111 in preset time is calculated；
S504. more each voltage difference size obtains maximum voltage difference △ Umax;
S505. judge whether maximum voltage difference △ Umax is greater than preset difference value, if then continuing to execute S506；If otherwise returning
S502；
S506. brownout threshold is improved, step S507 is continued to execute；
S507. reduce preset time, continue to execute step S502；
S508. the electric connection of battery pack 100 and electric tool is disconnected.
The present embodiment and embodiment illustrated in fig. 5 the difference is that, calculate preset time in series unit 111 electricity
Pressure difference first improves brownout threshold and reduces preset time again when maximum voltage difference △ Umax is greater than preset difference value, in this way,
It can further be conducive to detect the over-discharge battery core in series unit 111, reduce the frequency of battery core damage.
It should be noted that the voltage value Ui for detecting each series unit 111 in step S501 includes detection and calculates
The voltage value Ui of each series unit 111.It is possible, the voltage of each series unit 111 is detected and calculated within a preset time
Value Ui.
With reference to it is shown in Fig. 7 another be used for battery pack 100 control method, comprising the following steps:
S601. the voltage value Ui of each series unit 111 is detected；
S602. judge whether the voltage value Ui of each series unit 111 is less than brownout threshold U1；If then going to step S503；
Otherwise step S607 is gone to；
S603. the voltage difference △ Ui of the series unit 111 in preset time is calculated；
S604. more each voltage difference size obtains maximum voltage difference △ Umax;
S605. judge whether maximum voltage difference △ Umax is greater than preset difference value, if then continuing to execute S606；If otherwise returning
S602；
S606. brownout threshold is improved, preset time is reduced；
S607. the electric connection of battery pack 100 and power device 200 is disconnected.
The present embodiment and embodiment illustrated in fig. 6 the difference is that, in step S606, while improving brownout threshold,
Reduce preset time.Can further improve in this way detection battery core whether the detection efficiency of over-discharge, protect battery pack 100.It is possible,
Preset time can be filtering time.
The basic principles, main features and advantages of the invention have been shown and described above.The technical staff of the industry should
Understand, the above embodiments do not limit the invention in any form, all obtained by the way of equivalent substitution or equivalent transformation
Technical solution is fallen within the scope of protection of the present invention.
Claims (10)
1. a kind of battery pack, comprising:
More than one series unit being connected in series each other；
Voltage detection module, for detecting the voltage of multiple series units respectively；
Controller is used for
It receives voltage detection module voltage detected and calculates the voltage between the series unit in preset time
Difference increases the brownout threshold of the battery pack when the voltage difference is more than preset difference value.
2. battery pack according to claim 1, which is characterized in that
The controller calculates the voltage difference between the series unit in the preset time, and the voltage difference is more
The maximum value of voltage difference between a series unit.
3. battery pack according to claim 2, which is characterized in that
The controller reduces the preset time when the voltage difference is more than the preset difference value.
4. battery pack according to claim 1, which is characterized in that
The controller is before calculating the voltage difference between the series unit in the preset time, the string
The voltage and the brownout threshold of receipts or other documents in duplicate member.
5. battery pack according to claim 1, which is characterized in that
The series unit includes two battery cores in parallel.
6. a kind of detection method for battery pack, the battery pack includes the Series Sheet that more than one is connected in series each other
Member, which comprises
Detect the voltage of the series unit；
Calculate the voltage difference of the series unit in preset time；
The brownout threshold of the battery pack is improved when the voltage difference is more than preset difference value.
7. detection method according to claim 6, which is characterized in that
Maximum voltage value of the voltage difference in the voltage difference between multiple series units.
8. detection method according to claim 6, which is characterized in that
Reduce the preset time when the voltage difference is more than preset difference value.
9. detection method according to claim 6, which is characterized in that
Further include:
Compare the voltage value and the brownout threshold of the series unit.
10. detection method according to claim 6, which is characterized in that
Further include:
Compare the voltage value and the brownout threshold of the series unit；
The voltage difference of the series unit in preset time is calculated if the voltage difference is greater than the brownout threshold.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710654063.2A CN109390983B (en) | 2017-08-03 | 2017-08-03 | Battery pack and detection method for battery pack |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710654063.2A CN109390983B (en) | 2017-08-03 | 2017-08-03 | Battery pack and detection method for battery pack |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109390983A true CN109390983A (en) | 2019-02-26 |
| CN109390983B CN109390983B (en) | 2021-11-19 |
Family
ID=65412747
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710654063.2A Active CN109390983B (en) | 2017-08-03 | 2017-08-03 | Battery pack and detection method for battery pack |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109390983B (en) |
Citations (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20040113587A1 (en) * | 2002-12-17 | 2004-06-17 | Bohne William C. | Method for rapid charge control in lithium batteries |
| CN1578043A (en) * | 2003-07-29 | 2005-02-09 | 华为技术有限公司 | Protecting method and apparatus for battery undervoltage |
| US20090295332A1 (en) * | 2008-06-03 | 2009-12-03 | Samsung Sdi Co., Ltd. | Battery pack and charging method for the same |
| CN102271954A (en) * | 2009-01-12 | 2011-12-07 | 法雷奥电机设备公司 | Method of controlling an energy storage unit in a vehicle micro-hybrid system |
| CN102427258A (en) * | 2011-12-02 | 2012-04-25 | 苏州冠硕新能源有限公司 | Battery management system |
| CN104135047A (en) * | 2014-07-16 | 2014-11-05 | 国家电网公司 | Active and passive synergic hybrid equalization circuit of series storage battery pack, and equalization method |
| CN104425852A (en) * | 2013-09-06 | 2015-03-18 | 苏州宝时得电动工具有限公司 | Control method, control assembly, battery system and electric tool |
| CN104600801A (en) * | 2015-01-16 | 2015-05-06 | 荆延杰 | Charging and discharging balancing circuit and method of series battery pack |
| JP6024596B2 (en) * | 2013-05-28 | 2016-11-16 | 株式会社デンソー | Drive element protection circuit and load drive device |
| CN106299497A (en) * | 2015-06-02 | 2017-01-04 | 南京德朔实业有限公司 | Electric tool and the communicating control method of battery bag |
| CN107139747A (en) * | 2017-05-15 | 2017-09-08 | 南昌大学 | Electric automobile |
-
2017
- 2017-08-03 CN CN201710654063.2A patent/CN109390983B/en active Active
Patent Citations (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20040113587A1 (en) * | 2002-12-17 | 2004-06-17 | Bohne William C. | Method for rapid charge control in lithium batteries |
| CN1578043A (en) * | 2003-07-29 | 2005-02-09 | 华为技术有限公司 | Protecting method and apparatus for battery undervoltage |
| US20090295332A1 (en) * | 2008-06-03 | 2009-12-03 | Samsung Sdi Co., Ltd. | Battery pack and charging method for the same |
| CN102271954A (en) * | 2009-01-12 | 2011-12-07 | 法雷奥电机设备公司 | Method of controlling an energy storage unit in a vehicle micro-hybrid system |
| CN102427258A (en) * | 2011-12-02 | 2012-04-25 | 苏州冠硕新能源有限公司 | Battery management system |
| JP6024596B2 (en) * | 2013-05-28 | 2016-11-16 | 株式会社デンソー | Drive element protection circuit and load drive device |
| CN104425852A (en) * | 2013-09-06 | 2015-03-18 | 苏州宝时得电动工具有限公司 | Control method, control assembly, battery system and electric tool |
| CN104135047A (en) * | 2014-07-16 | 2014-11-05 | 国家电网公司 | Active and passive synergic hybrid equalization circuit of series storage battery pack, and equalization method |
| CN104600801A (en) * | 2015-01-16 | 2015-05-06 | 荆延杰 | Charging and discharging balancing circuit and method of series battery pack |
| CN106299497A (en) * | 2015-06-02 | 2017-01-04 | 南京德朔实业有限公司 | Electric tool and the communicating control method of battery bag |
| CN107139747A (en) * | 2017-05-15 | 2017-09-08 | 南昌大学 | Electric automobile |
Non-Patent Citations (1)
| Title |
|---|
| 王榆: "《一种用于自平衡两轮车的锂电池》", 《电气技术》 * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN109390983B (en) | 2021-11-19 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JP6833984B2 (en) | Battery, terminal, and charging system | |
| CN102064356B (en) | Battery management system | |
| CN104348215B (en) | Charger, battery module, and systems and methods for identifying and monitoring a battery charger | |
| US11095131B2 (en) | Battery management system and energy storage power station | |
| CN205097957U (en) | Interlocking of electric automobile high pressure realizes device | |
| CN105676091A (en) | Battery pack insulation detection apparatus and insulation detection method thereof | |
| CN104838536A (en) | Battery management system and battery system | |
| CN102280864A (en) | Post-failure live treatment method for protection device of distribution network system and portable protection device | |
| CN104659866A (en) | Rechargeable battery temperature detection method, power management device and electronic system | |
| CN206516856U (en) | Safety verification equipment | |
| CN104678217A (en) | Insulation detecting system and method for composite power supply current transformer | |
| CN106299180B (en) | The combination of electric tool and battery pack | |
| CN104065281B (en) | A kind of power supply unit and base station | |
| CN104917283A (en) | UPS with forced bypass protection function | |
| CN103311966B (en) | It is applied to battery adaptive controller and the method for batteries in parallel connection group | |
| CN104104330A (en) | Insulation detection system and insulation detection method for photovoltaic energy storage system | |
| CN107979060B (en) | Charging and discharging circuit, power supply control circuit and control method | |
| CN109687400A (en) | A kind of low consumption circuit and its implementation suitable for battery protection | |
| CN103558462B (en) | Detect the apparatus and method of battery management system | |
| CN102759712B (en) | Battery testing device and testing method thereof | |
| CN111384751A (en) | Charge-discharge management system of lithium battery pack | |
| CN103595264B (en) | There is the high frequency electric source of site manual operation system | |
| CN109390983A (en) | Battery pack and detection method for battery pack | |
| CN106541842B (en) | The charging pile of zero standby power consumption | |
| CN103515934B (en) | Method for monitoring a disconnection device in a battery system, and corresponding monitoring device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CP03 | Change of name, title or address | ||
| CP03 | Change of name, title or address |
Address after: 211106 No. 529, 159, Jiangjun Avenue, Jiangning District, Nanjing, Jiangsu Province Patentee after: Nanjing Quanfeng Technology Co.,Ltd. Address before: 211106, No. 159, general road, Jiangning economic and Technological Development Zone, Nanjing, Jiangsu Patentee before: NANJING CHERVON INDUSTRY Co.,Ltd. |