CN202374000U - Control device for realizing balance charging of battery pack and battery box - Google Patents
Control device for realizing balance charging of battery pack and battery box Download PDFInfo
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- CN202374000U CN202374000U CN 201120522848 CN201120522848U CN202374000U CN 202374000 U CN202374000 U CN 202374000U CN 201120522848 CN201120522848 CN 201120522848 CN 201120522848 U CN201120522848 U CN 201120522848U CN 202374000 U CN202374000 U CN 202374000U
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Abstract
The embodiment of the utility model discloses a control device for realizing the balance charging of a battery pack and a battery box. The control device comprises the realization steps that: the battery state signals of the battery pack are periodically detected, and the battery state signals comprise state of charge (SOC), internal resistance, voltage, current and/or temperature; whether batteries in the battery pack need the balance control or not is judged according to the battery state signals, and if so, the batteries are subjected to the balance control through a balance unit connected with the batteries. When the control device for realizing the balance charging of the battery pack and the battery box disclosed by the embodiment of the utility model are adopted, the battery state signals such as the SOC, the internal resistance, the voltage, the current and the temperature can be synthesized, the real state balance of the batteries is realized, the switch topology structure and the control have higher efficiency and stability, the size of magnetic elements is greatly reduced, and the realization by integrated circuits is also easy.
Description
Technical field
The utility model relates to the electric vehicle engineering field, particularly relates to a kind of control device and battery case of realizing the battery pack balancing charging.
Background technology
It is power that electric automobile is meant with the vehicle power, goes with power wheel, meets the vehicle of road traffic, the requirement of safety regulations each item.Electric automobile has application scenarios very widely at present.Electric automobile generally uses the battery of standard as its driving power.But cell is in manufacture process; Dispersiveness with performance, and in use the power brick internal environment also has heterogeneity is therefore along with the increase of service time; Performance difference between the cell will widen gradually; If do not reduce this species diversity and do not take appropriate measures, some cell overcharges with causing, some cell overdischarge and overcharge and cross the consequence of putting, and this not only influences the useful life of battery; Damage battery, cause battery burning or blast but also possibly produce great amount of heat.
In the prior art; When the battery of electric automobile uses in serial connection, owing to battery quality, batch etc. self reason and the damage of indivedual electric cores in use, make battery pack after long-term the use; The capacity of each electric core can be variant; And this species diversity can become increasing in time, causes when charging simultaneously to a plurality of batteries in this battery pack (being under the same current conditions of process), and electric core capacious always is in the shallow shallow state of putting that fills; Its electric core capacity attenuation is slow, has longer useful life; And the little electric core of capacity is compared with electric core capacious, just always is in the super-charge super-discharge state, and the electric core capacity that capacity is little will be accelerated decay and shorten the life-span.And since life-span of battery pack be by the life-span decision of the poorest electric core, thereby cause the bulk life time of battery pack to descend thereupon.
Therefore take balancing technique to come that the performance difference between each battery is very important in the balancing battery group, realize that the control device and the battery case of battery pack balancing charging also are the technical problems that those skilled in the art are badly in need of solving and the proposition how can innovate is a kind of.
The utility model content
The utility model technical problem to be solved is; A kind of control device and battery case of realizing the battery pack balancing charging is provided; Through the introducing of equilibrium control, can also can prolong the useful life of battery in the battery pack so that the consistency of battery has obtained improving largely.
For solving the problems of the technologies described above, the utility model also provides a kind of control device of realizing the battery pack balancing charging, comprising:
Detecting unit is used for the battery status signal that periodicity detects said battery pack, and said battery status signal comprises: battery charge state SOC, internal resistance, voltage, electric current and/or temperature;
Balanced judging unit is used for judging according to said battery status signal whether the battery of said battery pack need carry out equilibrium control;
Balanced control unit, the result who is used at telling judging unit is under the situation that is, the balanced unit that connects through said battery carries out equilibrium control to said battery.
Preferably, said detecting unit specifically comprises:
First judgment sub-unit is used to judge whether to arrive first Preset Time that carries out battery cell monitoring;
The Information Monitoring subelement, the result who is used in said first judgment sub-unit is under the situation that is, gathers the voltage and/or the current information of current battery pack;
Second judgment sub-unit is used for judging according to said current information whether the battery of said battery pack the overcurrent that charges occurs;
The first charge protection subelement, the result who is used in said second judgment sub-unit is under the situation that is, puts charging overcurrent sign and carries out charge protection;
First removes subelement, is used under the situation that begins to discharge, and removes said charging overcurrent sign and discharges charge protection;
The 3rd judgment sub-unit is used for judging whether the battery of said battery pack the overcurrent that discharges occurs;
The first discharge prevention subelement, the result who is used in said the 3rd judgment sub-unit is under the situation that is, puts electric overcurrent sign and carries out discharge prevention;
Second removes subelement, is used under the situation that begins to charge, and removes said discharge overcurrent sign and discharges discharge prevention;
The 4th judgment sub-unit is used for judging according to said information of voltage whether the battery of said battery pack voltage occurs and overcharge;
The second charge protection subelement, the result who is used in said the 4th judgment sub-unit is under the situation that is, puts to overcharge sign and carry out charge protection;
The 3rd removes subelement, is used for when overcharging recovery voltage, removes said sign and the release charge protection of overcharging;
The 5th judgment sub-unit is used for judging according to said information of voltage whether the battery of said battery pack voltage occurs and cross and put;
The second discharge prevention subelement, the result who is used in said the 5th judgment sub-unit is under the situation that is, puts to put sign and carry out discharge prevention;
Cleaning politics, economics, organization, and ideology removes subelement, is used for when putting recovery voltage excessively, removes said mistake and puts sign and discharge discharge prevention.
Preferably, said detection module specifically comprises:
The 6th judgment sub-unit is used to judge whether to arrive second Preset Time that carries out electric weight calculating;
First gathers subelement, and the result who is used in said the 6th judgment sub-unit is under the situation that is, gathers the voltage and/or the current information of current battery pack;
The 7th judgment sub-unit is used for judging according to said voltage and/or current information whether the battery of said battery pack charges and ends;
First is provided with subelement, and the result who is used in said the 7th judgment sub-unit is under the situation that is, is changed to charging by sign;
The 5th removes subelement, is used in said charging under situation about recovering, removing said charging by sign;
The 8th judgment sub-unit, whether the battery that is used for judging said battery pack discharges and ends;
Second is provided with subelement, and the result who is used in said the 8th judgment sub-unit is under the situation that is, is changed to discharge by sign;
The 6th removes subelement, is used in said discharge under situation about recovering, removing said discharge by sign;
Calculate the SOC subelement, be used for upgrading the current electric quantity of said battery pack battery, and calculate the SOC in the said battery pack;
Electric weight study subelement after complete carrying out once discharges and recharges, carries out electric weight study according to said SOC.
Preferably, said detection module specifically comprises:
The 9th judgment sub-unit is used to judge whether to arrive the 3rd Preset Time that carries out temperature computation;
The tenth judgment sub-unit, the result who is used in said the 9th judgment sub-unit is under the situation that is, judges whether the temperature of the battery in the said battery pack is higher than the first preset temperature threshold value;
The first charge and discharge protecting subelement, the result who is used in said the tenth judgment sub-unit is under the situation that is, is changed to the too high sign of temperature and carries out charge and discharge protecting;
The 7th removes subelement, is used under the situation of the too high recovery of temperature, removes the too high sign of temperature and carry out charge and discharge protecting to discharge;
The 11 judgment sub-unit is used for judging whether the temperature of the battery of said battery pack is lower than the second preset temperature threshold value;
The second charge and discharge protecting subelement, the result who is used in said the 11 judgment sub-unit is under the situation that is, is changed to temperature and crosses low sign and carry out charge and discharge protecting;
The 8th removing subelement is used for crossing under the low situation about recovering in temperature, removes said temperature and crosses low sign and carry out charge and discharge protecting release;
The 12 judgment sub-unit is used for judging whether change frequency is higher than the predeterminated frequency threshold value for the temperature of battery of said battery pack;
The 3rd charge and discharge protecting subelement, the result who is used in said the 12 judgment sub-unit is under the situation that is, is changed to the jump in temperature sign and carries out charge and discharge protecting;
The 9th removes subelement, is used under the situation that jump in temperature recovers, and removes the jump in temperature sign and discharges charge and discharge protecting.
Preferably, also comprise:
The time judging unit is used to judge whether to arrive the 4th Preset Time that carries out battery status signal output;
The data output unit, the result who is used at said time judging unit is under the situation that is, detected battery status signal is exported.
Preferably, said balanced control unit specifically is used for:
The current charge information of the said battery of the said battery status signal indication of foundation; Whether it is closed or break off to control the switch element of said battery, and said current charge information comprises: the battery in the said battery pack occur charging overcurrent, discharge overcurrent, voltage overcharges, voltage is crossed and put, temperature is too high, temperature is crossed low and/or jump in temperature information.
Preferably, also comprise:
Alarm unit is used for indicating the battery of said battery pack to occur that charging overcurrent, discharge overcurrent, voltage overcharge, voltage is crossed and put, temperature is too high, temperature is crossed under the situation of low and/or jump in temperature at said current charge information, reports to the police.
The utility model also provides a kind of battery case of realizing the battery pack balancing charging, comprises the control device of aforementioned each realization battery pack balancing charging.
Can find out that from above-mentioned technical scheme the utility model embodiment can be directed against condition of different,,, improve battery life in groups to improve into the charge and discharge balancing management of Battery pack through parameters such as balanced unlatching, euqalizing current percentage are set.The high-power string charging system of the utility model embodiment is when battery charge during early stage, is filled mode according to high-power string; Improve charge efficiency; And the small-power of the utility model embodiment and charging system are when to battery charge during the later stage, according to small-power and fill mode; Prevent to overcharge, realize charge balancing.Therefore, the equalizing charge controlling schemes among the utility model embodiment is carried out intelligent decision to the switching of two kinds of charging systems, realizes the unification of charge efficiency and charge protection.
Description of drawings
Fig. 1 is the structural representation of the utility model device embodiment one;
Fig. 2 is a structural representation of detecting unit 101 among the device embodiment one;
Fig. 3 is another structural representation of detecting unit 101 among the device embodiment one;
Fig. 4 is another structural representation of detecting unit 101 among the device embodiment one;
Fig. 5 a is the charging curve sketch map that iron lithium 4 crosstalk ponds do not add balanced chip;
Fig. 5 b is the charging curve sketch map that iron lithium 4 crosstalk ponds add balanced chip;
Fig. 6 a is the discharge curve sketch map that iron lithium 4 crosstalk ponds do not add balanced chip;
Fig. 6 b is the discharge curve sketch map that iron lithium 4 crosstalk ponds add balanced chip;
Fig. 7 is the structural representation of the utility model device embodiment two.
Embodiment
In order to make those skilled in the art person understand the utility model scheme better; To combine the accompanying drawing among the utility model embodiment below; Technical scheme among the utility model embodiment is carried out clear, intactly description; Obviously, described embodiment only is the utility model part embodiment, rather than whole embodiment.
Related battery balanced of battery charge is divided into initiatively balanced and passive equilibrium, and present most of battery pack is all introduced the balanced passive equilibrium of controlling or adopt.The passive equilibrium here; Refer to employing the higher battery of voltage is adopted the method for discharging, to reach dynamic balance each other between battery, this passive equalization methods; Though can play a role, have shortcomings such as dynamic adjustments narrow range, consistency is poor, power consumption is big.And adopt the active of discrete component balanced, reduced some shortcomings of passive equilibrium to a certain extent, but had, consistency difference and the poor stability that causes, shortcoming such as power consumption is big because discrete component quantity is many.
The utility model embodiment is the balanced Application Design of active of core with the balanced chip of active.Adopting the active balancing technique of chip-scale, both can avoid the defective in the passive balanced design, can avoid the balanced shortcoming of active of discrete component again, is the direction of following battery group technology balancing technique.Equalizing system among the utility model embodiment is made up of a plurality of modules, and each battery can be joined a balanced unit, and upper strata battery management system (BMS system) is regulated the proportionality action of balanced unit, thereby reaches portfolio effect.
Utilize the new battery balanced management system and the hardware technology of chip-scale among the utility model embodiment; Can, whole Battery pack carry out equilibrium control when discharging and recharging to battery; Combine battery status signals such as battery charge state, internal resistance, voltage, electric current and temperature, can realize the real state balance of battery.And, also can eliminate the difference between cell through the balance control method of present embodiment.
The utility model embodiment provides a kind of control device of realizing the battery pack balancing charging.Referring to Fig. 1, show a kind of structural representation of realizing the control device embodiment 1 of battery pack balancing charging, can comprise:
Detecting unit 101 is used for the battery status signal that periodicity detects said battery pack, and said battery status signal comprises: battery charge state SOC, internal resistance, voltage, electric current and/or temperature;
In the present embodiment; Need regularly detect the battery status signal in the battery pack, wherein can comprise battery charge state SOC, the internal resistance of battery; Cell voltage; Battery current or battery temperature signal etc. again according to detected battery status signal, can judge whether and need carry out equilibrium control to the battery in the battery pack.
Detecting unit 101 can have a variety of implementations in the specific implementation.With reference to shown in Figure 2, in various embodiment, said detecting unit 101 specifically can comprise:
First judgment sub-unit 201 is used to judge whether to arrive first Preset Time that carries out battery cell monitoring;
First judgment sub-unit 201 at first judges whether to arrive first Preset Time that carries out battery cell monitoring, 1ms for example, and certainly, this time can be provided with different numerical according to application demand.
202 on Information Monitoring subelement is gathered cell voltage in the current battery pack and current information, so that follow-uply can also judge whether to carry out equilibrium control according to the height of voltage and current.
Second judgment sub-unit 203 is used for judging according to said current information whether the battery of said battery pack the overcurrent that charges occurs;
Second judgment sub-unit 203 is according to the size of current of current information indication, can judge the phenomenon whether battery in the current battery pack charging overcurrent occurred.
The first charge protection subelement 204, the result who is used in said second judgment sub-unit is under the situation that is, puts charging overcurrent sign and carries out charge protection;
The battery that the charging over-current phenomenon avoidance appears in 204 pairs on the first charge protection subelement is changed to charging overcurrent sign, and this battery is carried out charge protection.For example can control the charging that balanced unit that this battery connects breaks off this battery connects.
First removes subelement 205, is used under the situation that begins to discharge, and removes said charging overcurrent sign and discharges charge protection;
First removes subelement 205 judges then whether the battery that the charging overcurrent occurs begins discharge, if then the charging overcurrent sign of this battery is removed, and discharged said charge protection.
The 3rd judgment sub-unit 206 is used for judging whether the battery of said battery pack the overcurrent that discharges occurs;
The 3rd judgment sub-unit 206 continues to judge whether occur the discharging situation of overcurrent of the battery in the battery pack.
The first discharge prevention subelement 207, the result who is used in said the 3rd judgment sub-unit is under the situation that is, puts electric overcurrent sign and carries out discharge prevention;
The first discharge prevention subelement 207 will occur the discharging battery of over-current phenomenon avoidance is changed to discharge overcurrent sign and it is carried out discharge prevention;
Second removes subelement 208, is used under the situation that begins to charge, and removes said discharge overcurrent sign and discharges discharge prevention;
Under the situation that this battery begins to charge, second removes subelement 208 removes above-mentioned discharge overcurrent sign again and discharges said discharge prevention;
The 4th judgment sub-unit 209 is used for judging according to said information of voltage whether the battery of said battery pack voltage occurs and overcharge;
The 4th judgment sub-unit 209 then judges according to the information of voltage that collects whether the battery in the battery pack phenomenon that voltage overcharges occurred;
The second charge protection subelement 210, the result who is used in said the 4th judgment sub-unit is under the situation that is, puts to overcharge sign and carry out charge protection;
If the phenomenon that voltage overcharges appears in the battery in the second charge protection subelement, 210 battery pack, then put and overcharge sign and it is carried out charge protection;
The 3rd removes subelement 211, is used for when overcharging recovery voltage, removes said sign and the release charge protection of overcharging;
When the battery in this battery pack occurred overcharging recovery voltage, 211 removings of the 3rd removing subelement are said to overcharge sign and discharges said charge protection;
The 5th judgment sub-unit 212 is used for judging according to said information of voltage whether the battery of said battery pack voltage occurs and cross and put;
The information of voltage that the 5th judgment sub-unit 212 foundations collect judges whether the battery in the battery pack voltage occurs and cross the phenomenon of putting;
The second discharge prevention subelement 213, the result who is used in said the 5th judgment sub-unit is under the situation that is, puts to put sign and carry out discharge prevention;
If 213 on the second discharge prevention subelement need voltage occur to this and cross the battery of putting phenomenon and put and put sign and carry out discharge prevention;
Cleaning politics, economics, organization, and ideology removes subelement 214, is used for when putting recovery voltage excessively, removes said mistake and puts sign and discharge discharge prevention.
And when putting recovery voltage excessively, cleaning politics, economics, organization, and ideology removes the said mistake of subelement 214 removings puts sign and discharges said discharge prevention.
With reference to shown in Figure 3, in various embodiment, detect for carrying out electric weight, said detection module 101 specifically can comprise:
The 6th judgment sub-unit 301 is used to judge whether to arrive second Preset Time that carries out electric weight calculating;
The 6th judgment sub-unit 301 judges that current whether arrival carry out second Preset Time that electric weight calculates, 20ms for example, and certainly, this time can be carried out adaptive adjustment according to the actual requirements.
First gathers subelement 302, and the result who is used in said the 6th judgment sub-unit is under the situation that is, gathers the voltage and/or the current information of current battery pack;
The 7th judgment sub-unit 303 is used for judging according to said voltage and/or current information whether the battery of said battery pack charges and ends;
The 7th judgment sub-unit 303 is according to the voltage and/or the current information of the battery pack that collects, and judges whether battery in the current battery pack charges to end;
First is provided with subelement 304, and the result who is used in said the 7th judgment sub-unit is under the situation that is, is changed to charging by sign;
First is provided with the battery that 304 pairs of chargings of subelement end is changed to charging by sign;
The 5th removes subelement 305, is used in said charging under situation about recovering, removing said charging by sign;
The 8th judgment sub-unit 306, whether the battery that is used for judging said battery pack discharges and ends;
Second is provided with subelement 307, and the result who is used in said the 8th judgment sub-unit is under the situation that is, is changed to discharge by sign;
Second is provided with subelement 307 is changed to discharge by sign with the battery that ends of discharge in the battery pack;
The 6th removes subelement 308, is used in said discharge under situation about recovering, removing said discharge by sign;
The 6th removes subelement 308 ends under the situation about recovering in discharge, removes said discharge by sign;
Calculate SOC subelement 309, be used for upgrading the current electric quantity of said battery pack battery, and calculate the SOC in the said battery pack;
When reality is used, the ratio of the capacity of the residual capacity charged state complete after storage battery uses a period of time or lies idle for a long time with it, percentage commonly used is represented.SOC=1 promptly is expressed as the battery full state, must consider its state-of-charge and control when storage battery moves.
Need to upgrade the current electric quantity of battery in the battery pack, and calculate SOC; It is thus clear that the utility model embodiment has introduced fuzzy algorithmic approach and artificial intelligence control, to the characteristic of electrokinetic cell, with the nonlinear state spatial model linearisation of battery, in real time, accurately estimates the SOC value.Based on the equalization algorithm of SOC, combine battery status signals such as battery charge state, internal resistance, voltage, electric current and temperature among the utility model embodiment, realized the real state balance of battery.And the battery of all operations is full of simultaneously, has put simultaneously, be embodied as the heap(ed) capacity and the maximum life of Battery pack.
Electric weight study subelement 310 after complete carrying out once discharges and recharges, carries out electric weight study according to said SOC.
The disclosed balanced control of the utility model embodiment on the basis of a large amount of battery behavior experiments, has been developed the equalization algorithm of a cover based on SOC, with traditional voltage equalization and passive type equalization ratio, can really realize the state balance of battery.
To the detection of temperature, with reference to shown in Figure 4, in various embodiment, said detection module 801 specifically can comprise:
The 9th judgment sub-unit 401 is used to judge whether to arrive the 3rd Preset Time that carries out temperature computation;
Judge whether the current time arrive the 3rd Preset Time that carries out temperature computation, for example 20ms need to prove, the difference that this time still can be according to the actual requirements and accommodation.
The tenth judgment sub-unit 402, the result who is used in said the 9th judgment sub-unit is under the situation that is, judges whether the temperature of the battery in the said battery pack is higher than the first preset temperature threshold value;
The tenth judgment sub-unit 402 judges whether temperature is higher than a preset temperature value, if be higher than this preset temperature value then can be judged as this battery temperature too high, in practical application, this preset temperature value can accommodation;
The first charge and discharge protecting subelement 403, the result who is used in said the tenth judgment sub-unit is under the situation that is, is changed to the too high sign of temperature and carries out charge and discharge protecting;
The too high battery of 403 pairs of temperature of the first charge and discharge protecting subelement then is changed to the too high sign of temperature and it is carried out charge and discharge protecting;
The 7th removes subelement 404, is used under the situation of the too high recovery of temperature, removes the too high sign of temperature and carry out charge and discharge protecting to discharge;
The 11 judgment sub-unit 405 is used for judging whether the temperature of the battery of said battery pack is lower than the second preset temperature threshold value;
The 11 judgment sub-unit 405 judges then whether battery temperature is lower than a preset temperature value in the battery pack; If be lower than this preset temperature value then can be judged as the temperature of this battery low excessively; In practical application, this preset temperature value can accommodation; Need to prove that this second preset temperature threshold ratio, first preset temperature threshold value is low;
The second charge and discharge protecting subelement 406, the result who is used in said the 11 judgment sub-unit is under the situation that is, is changed to temperature and crosses low sign and carry out charge and discharge protecting;
The 8th removing subelement 407 is used for crossing under the low situation about recovering in temperature, removes said temperature and crosses low sign and carry out charge and discharge protecting release;
The 12 judgment sub-unit 408 is used for judging whether change frequency is higher than the predeterminated frequency threshold value for the temperature of battery of said battery pack;
The temperature difference that variations in temperature produced of battery if this change frequency is higher than the frequency preset threshold value, means that so jump in temperature has taken place the temperature of this battery in the change frequency representation unit time here;
The 3rd charge and discharge protecting subelement 409, the result who is used in said the 12 judgment sub-unit is under the situation that is, is changed to the jump in temperature sign and carries out charge and discharge protecting;
409 on the 3rd charge and discharge protecting subelement is changed to the jump in temperature sign and carries out charge and discharge protecting this battery;
The 9th removes subelement 410, is used under the situation that jump in temperature recovers, and removes the jump in temperature sign and discharges charge and discharge protecting.
Concrete, in practical application, said balanced control unit 103 specifically can be used for:
The current charge information of the said battery of the said battery status signal indication of foundation; Whether it is closed or break off to control the switch element of said battery, and said current charge information comprises: the battery in the said battery pack occur charging overcurrent, discharge overcurrent, voltage overcharges, voltage is crossed and put, temperature is too high, temperature is crossed low and/or jump in temperature information.
Wherein, Specifically can be according to the current charge information of the said battery of said battery status signal indication; Whether it is closed or break off to control the switch element of said battery, and said current charge information comprises: the battery in the said battery pack occur charging overcurrent, discharge overcurrent, voltage overcharges, voltage is crossed and put, temperature is too high, temperature is crossed low and/or jump in temperature information.Thus it is clear that, through the ON time and the frequency of control switch, can reach the purpose of control output current, and realize the equilibrium control of battery.
The disclosed balancer of the utility model embodiment compares with the traditional voltage equalization, has the advantages that equilibrium is quick, efficient, power consumption is low.Fig. 5 a is the charging curve sketch map that iron lithium 4 crosstalk ponds do not add balanced chip; Fig. 5 b is the charging curve sketch map that iron lithium 4 crosstalk ponds add balanced chip; Fig. 6 a is the discharge curve sketch map that iron lithium 4 crosstalk ponds do not add balanced chip, and Fig. 6 b is the discharge curve sketch map that iron lithium 4 crosstalk ponds do not add balanced chip.Can find out obviously from four figure, add after the balanced chip that the consistency of cell improves, charging and discharging curve is almost completely identical, has also avoided the super-charge super-discharge phenomenon of battery.Each cell can be full of simultaneously, put simultaneously, realize equilibrium truly.
It is thus clear that the ability of equalization of the disclosed balance control method of the utility model embodiment is stronger; Can use " sluggish peak value-valley " current control method; And ON time and frequency through control switch, reaching the purpose of control output current, maximum euqalizing current can reach more than the 10A.And it is low in energy consumption; The utility model embodiment uses distinctive power analog chip designing technique; Adopt 4 novel switch lifting/lowering topological structure circuit and New type of current control methods, in entire circuit, can regulate output voltage, make it not receive the influence of cell voltage height; Transmitted in both directions energy efficiently, the equilibrium that keeps battery in the battery pack.Therefore; The utility model embodiment is battery status signals such as battery charge state, internal resistance, voltage, electric current and temperature comprehensively; Realized the real state balance of battery; Switch topology has higher efficient and stability with control, and the volume of magnetic element greatly reduces, and also is easy to realize with integrated circuit.
Referring to Fig. 7, show a kind of structural representation of realizing the control device embodiment 2 of battery pack balancing charging, can comprise:
Detecting unit 101 is used for the battery status signal that periodicity detects said battery pack, and said battery status signal comprises: battery charge state SOC, internal resistance, voltage, electric current and/or temperature;
The utility model embodiment can adopt the three ring controls of " sluggish peak value-valley " current control method through input, output current and output voltage; Realize energy transmitted in both directions and stable output voltage easily; And ON time and frequency through control switch, reach the purpose of control output current.
" sluggish peak value-valley " current control method can be realized energy transmitted in both directions and stable output voltage easily through three ring controls of input, output current and output voltage.In addition, this electric current control method can be controlled running frequency effectively, and this makes power transfer when underloading, also keep very high efficient.
The utility model embodiment can also overcharge at battery appearance charging overcurrent, discharge overcurrent, voltage, voltage is crossed and put, temperature is too high, temperature is crossed under the situation of low and/or jump in temperature, reports to the police.The utility model implements to have higher efficient and stability, and the volume of magnetic element greatly reduces, and is easy to realize with integrated circuit.
The control device of the disclosed equalizing charge of the utility model embodiment; Monitoring, data processing and the transmission that has except common BMS system, discharge and recharge the function such as control, also have redundancy, fault-tolerance control, early warning and defencive function (temperature, voltage, electric current, internal resistance etc.), management system self check, discharge and recharge strong functions such as active balanced control.And the precision of image data is high; Parameters such as the voltage of battery, electric current and temperature are gathered through integrated the approaching one by one of proprietary chip internal (SAR) type high-speed ADC; Temperature in voltage, electric current and the Battery case of each single battery in the dynamic real-time monitoring battery pack; Sampling period is short, and precision is high.And SOC (state-of-charge), SOH (battery health degree) battery predictive are also comparatively accurate; On the basis of a large amount of battery behavior experiments; The battery SOC of the utility model embodiment, SOH predicted method; Can accurately predict the SOC (precision＞5%) and the SOH of battery pack, the assurance battery pack is moved under desirable operating state.
In addition, the distinctive active balance module of the utility model embodiment is with traditional voltage equalization and passive type equalization ratio; The ability of equalization strong (maximum euqalizing current can reach more than the 10A) not only; Distinctive equalization algorithm can really be realized the state balance of battery, and the design of novel low-power consumption analog chip, makes the whole influence that does not receive the cell voltage height; Transmitted in both directions energy efficiently, the equilibrium that keeps battery in the battery pack.
Need to prove; In this article; Relational terms such as first and second grades only is used for an entity or operation are made a distinction with another entity or operation, and not necessarily requires or hint relation or the order that has any this reality between these entities or the operation.And; Term " comprises ", " comprising " or its any other variant are intended to contain comprising of nonexcludability; Thereby make and comprise that process, method, article or the equipment of a series of key elements not only comprise those key elements; But also comprise other key elements of clearly not listing, or also be included as this process, method, article or equipment intrinsic key element.Under the situation that do not having much more more restrictions, the key element that limits by statement " comprising ... ", and be not precluded within process, method, article or the equipment that comprises said key element and also have other identical element.
Device embodiment described above only is schematic; Wherein said unit as the separating component explanation can or can not be physically to separate also; The parts that show as the unit can be or can not be physical locations also; Promptly can be positioned at a place, perhaps also can be distributed on a plurality of NEs.Can realize the purpose of present embodiment scheme according to the needs selection some or all of module wherein of reality.Those of ordinary skills promptly can understand and implement under the situation of not paying creative work.
The above only is the embodiment of the utility model; Should be pointed out that for those skilled in the art, under the prerequisite that does not break away from the utility model principle; Can also make some improvement and retouching, these improvement and retouching also should be regarded as the protection range of the utility model.
Claims (8)
1. a device of realizing the control of battery pack balancing charging is characterized in that, comprising:
Detecting unit is used for the battery status signal that periodicity detects said battery pack, and said battery status signal comprises: battery charge state SOC, internal resistance, voltage, electric current and/or temperature;
Balanced judging unit is used for judging according to said battery status signal whether the battery of said battery pack need carry out equilibrium control;
Balanced control unit, the result who is used at telling judging unit is under the situation that is, the balanced unit that connects through said battery carries out equilibrium control to said battery.
2. device according to claim 1 is characterized in that, said detecting unit specifically comprises:
First judgment sub-unit is used to judge whether to arrive first Preset Time that carries out battery cell monitoring;
The Information Monitoring subelement, the result who is used in said first judgment sub-unit is under the situation that is, gathers the voltage and/or the current information of current battery pack;
Second judgment sub-unit is used for judging according to said current information whether the battery of said battery pack the overcurrent that charges occurs;
The first charge protection subelement, the result who is used in said second judgment sub-unit is under the situation that is, puts charging overcurrent sign and carries out charge protection;
First removes subelement, is used under the situation that begins to discharge, and removes said charging overcurrent sign and discharges charge protection;
The 3rd judgment sub-unit is used for judging whether the battery of said battery pack the overcurrent that discharges occurs;
The first discharge prevention subelement, the result who is used in said the 3rd judgment sub-unit is under the situation that is, puts electric overcurrent sign and carries out discharge prevention;
Second removes subelement, is used under the situation that begins to charge, and removes said discharge overcurrent sign and discharges discharge prevention;
The 4th judgment sub-unit is used for judging according to said information of voltage whether the battery of said battery pack voltage occurs and overcharge;
The second charge protection subelement, the result who is used in said the 4th judgment sub-unit is under the situation that is, puts to overcharge sign and carry out charge protection;
The 3rd removes subelement, is used for when overcharging recovery voltage, removes said sign and the release charge protection of overcharging;
The 5th judgment sub-unit is used for judging according to said information of voltage whether the battery of said battery pack voltage occurs and cross and put;
The second discharge prevention subelement, the result who is used in said the 5th judgment sub-unit is under the situation that is, puts to put sign and carry out discharge prevention;
Cleaning politics, economics, organization, and ideology removes subelement, is used for when putting recovery voltage excessively, removes said mistake and puts sign and discharge discharge prevention.
3. device according to claim 1 is characterized in that, said detection module specifically comprises:
The 6th judgment sub-unit is used to judge whether to arrive second Preset Time that carries out electric weight calculating;
First gathers subelement, and the result who is used in said the 6th judgment sub-unit is under the situation that is, gathers the voltage and/or the current information of current battery pack;
The 7th judgment sub-unit is used for judging according to said voltage and/or current information whether the battery of said battery pack charges and ends;
First is provided with subelement, and the result who is used in said the 7th judgment sub-unit is under the situation that is, is changed to charging by sign;
The 5th removes subelement, is used in said charging under situation about recovering, removing said charging by sign;
The 8th judgment sub-unit, whether the battery that is used for judging said battery pack discharges and ends;
Second is provided with subelement, and the result who is used in said the 8th judgment sub-unit is under the situation that is, is changed to discharge by sign;
The 6th removes subelement, is used in said discharge under situation about recovering, removing said discharge by sign;
Calculate the SOC subelement, be used for upgrading the current electric quantity of said battery pack battery, and calculate the SOC in the said battery pack;
Electric weight study subelement after complete carrying out once discharges and recharges, carries out electric weight study according to said SOC.
4. device according to claim 1 is characterized in that, said detection module specifically comprises:
The 9th judgment sub-unit is used to judge whether to arrive the 3rd Preset Time that carries out temperature computation;
The tenth judgment sub-unit, the result who is used in said the 9th judgment sub-unit is under the situation that is, judges whether the temperature of the battery in the said battery pack is higher than the first preset temperature threshold value;
The first charge and discharge protecting subelement, the result who is used in said the tenth judgment sub-unit is under the situation that is, is changed to the too high sign of temperature and carries out charge and discharge protecting;
The 7th removes subelement, is used under the situation of the too high recovery of temperature, removes the too high sign of temperature and carry out charge and discharge protecting to discharge;
The 11 judgment sub-unit is used for judging whether the temperature of the battery of said battery pack is lower than the second preset temperature threshold value;
The second charge and discharge protecting subelement, the result who is used in said the 11 judgment sub-unit is under the situation that is, is changed to temperature and crosses low sign and carry out charge and discharge protecting;
The 8th removing subelement is used for crossing under the low situation about recovering in temperature, removes said temperature and crosses low sign and carry out charge and discharge protecting release;
The 12 judgment sub-unit is used for judging whether change frequency is higher than the predeterminated frequency threshold value for the temperature of battery of said battery pack;
The 3rd charge and discharge protecting subelement, the result who is used in said the 12 judgment sub-unit is under the situation that is, is changed to the jump in temperature sign and carries out charge and discharge protecting;
The 9th removes subelement, is used under the situation that jump in temperature recovers, and removes the jump in temperature sign and discharges charge and discharge protecting.
5. according to claim 2,3 or 4 described devices, it is characterized in that, also comprise:
The time judging unit is used to judge whether to arrive the 4th Preset Time that carries out battery status signal output;
The data output unit, the result who is used at said time judging unit is under the situation that is, detected battery status signal is exported.
6. device according to claim 5 is characterized in that, said balanced control unit specifically is used for:
The current charge information of the said battery of the said battery status signal indication of foundation; Whether it is closed or break off to control the switch element of said battery, and said current charge information comprises: the battery in the said battery pack occur charging overcurrent, discharge overcurrent, voltage overcharges, voltage is crossed and put, temperature is too high, temperature is crossed low and/or jump in temperature information.
7. device according to claim 5 is characterized in that, also comprises:
Alarm unit is used for indicating the battery of said battery pack to occur that charging overcurrent, discharge overcurrent, voltage overcharge, voltage is crossed and put, temperature is too high, temperature is crossed under the situation of low and/or jump in temperature at said current charge information, reports to the police.
8. a battery case of realizing the battery pack balancing charging is characterized in that, comprises each described device like claim 1-7.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201120522848 CN202374000U (en) | 2011-12-14 | 2011-12-14 | Control device for realizing balance charging of battery pack and battery box |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201120522848 CN202374000U (en) | 2011-12-14 | 2011-12-14 | Control device for realizing balance charging of battery pack and battery box |
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| Publication Number | Publication Date |
|---|---|
| CN202374000U true CN202374000U (en) | 2012-08-08 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201120522848 Expired - Fee Related CN202374000U (en) | 2011-12-14 | 2011-12-14 | Control device for realizing balance charging of battery pack and battery box |
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| Country | Link |
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| CN (1) | CN202374000U (en) |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103954371A (en) * | 2014-04-11 | 2014-07-30 | 中冶南方工程技术有限公司 | Early warning method for damage to thermocouple protection device and thermocouple temperature monitor |
| CN103986205A (en) * | 2014-04-18 | 2014-08-13 | 同济大学 | Sixteen-string lithium battery pack multi-mode balance control method capable of carrying out dynamic adaption |
| CN104064831A (en) * | 2013-03-20 | 2014-09-24 | 罗伯特·博世有限公司 | Method For Equalizing Different States Of Charge Of Batteries |
| CN104064832A (en) * | 2013-03-20 | 2014-09-24 | 罗伯特·博世有限公司 | Method For Reducing The Total Charge Loss Of Storage Batteries |
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| CN109435771A (en) * | 2017-08-31 | 2019-03-08 | 比亚迪股份有限公司 | Battery equalization method, system, vehicle, storage medium and electronic equipment |
| CN110764006A (en) * | 2019-12-30 | 2020-02-07 | 杭州华塑加达网络科技有限公司 | Battery management system |
| CN111969680A (en) * | 2020-08-10 | 2020-11-20 | 傲普(上海)新能源有限公司 | Optimized BMS passive equalization method |
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- 2011-12-14 CN CN 201120522848 patent/CN202374000U/en not_active Expired - Fee Related
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104064831A (en) * | 2013-03-20 | 2014-09-24 | 罗伯特·博世有限公司 | Method For Equalizing Different States Of Charge Of Batteries |
| CN104064832A (en) * | 2013-03-20 | 2014-09-24 | 罗伯特·博世有限公司 | Method For Reducing The Total Charge Loss Of Storage Batteries |
| CN104064832B (en) * | 2013-03-20 | 2016-08-17 | 罗伯特·博世有限公司 | A kind of method of the total electrical charge loss for reducing battery |
| CN104064831B (en) * | 2013-03-20 | 2016-08-17 | 罗伯特·博世有限公司 | For the method balancing the different charged state of multiple battery |
| CN103954371A (en) * | 2014-04-11 | 2014-07-30 | 中冶南方工程技术有限公司 | Early warning method for damage to thermocouple protection device and thermocouple temperature monitor |
| CN103986205A (en) * | 2014-04-18 | 2014-08-13 | 同济大学 | Sixteen-string lithium battery pack multi-mode balance control method capable of carrying out dynamic adaption |
| CN103986205B (en) * | 2014-04-18 | 2016-02-17 | 同济大学 | 16 series lithium battery group multi-mode balance control methods of dynamic adaptation |
| CN107284283A (en) * | 2017-07-21 | 2017-10-24 | 四川长虹电器股份有限公司 | BMS devices for low-speed electronic car |
| CN109435771A (en) * | 2017-08-31 | 2019-03-08 | 比亚迪股份有限公司 | Battery equalization method, system, vehicle, storage medium and electronic equipment |
| CN109435771B (en) * | 2017-08-31 | 2021-06-18 | 比亚迪股份有限公司 | Battery equalization method, system, vehicle, storage medium and electronic device |
| CN110764006A (en) * | 2019-12-30 | 2020-02-07 | 杭州华塑加达网络科技有限公司 | Battery management system |
| CN111969680A (en) * | 2020-08-10 | 2020-11-20 | 傲普(上海)新能源有限公司 | Optimized BMS passive equalization method |
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