CN203674347U - Lithium-ion battery and lead-acid battery hybrid system - Google Patents
Lithium-ion battery and lead-acid battery hybrid system Download PDFInfo
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- CN203674347U CN203674347U CN201320703561.9U CN201320703561U CN203674347U CN 203674347 U CN203674347 U CN 203674347U CN 201320703561 U CN201320703561 U CN 201320703561U CN 203674347 U CN203674347 U CN 203674347U
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- 239000002253 acid Substances 0.000 title claims abstract description 141
- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 title claims abstract description 77
- 229910001416 lithium ion Inorganic materials 0.000 title claims abstract description 77
- 229910052744 lithium Inorganic materials 0.000 claims abstract description 20
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 claims abstract description 13
- 208000028659 discharge Diseases 0.000 claims description 97
- 238000000034 method Methods 0.000 claims description 26
- 230000008569 process Effects 0.000 claims description 15
- 150000001875 compounds Chemical class 0.000 claims description 13
- 230000015572 biosynthetic process Effects 0.000 claims description 2
- 230000008901 benefit Effects 0.000 abstract description 4
- 238000012360 testing method Methods 0.000 description 46
- 230000008859 change Effects 0.000 description 21
- 238000004519 manufacturing process Methods 0.000 description 13
- 238000010586 diagram Methods 0.000 description 8
- 239000005955 Ferric phosphate Substances 0.000 description 7
- 229940032958 ferric phosphate Drugs 0.000 description 7
- WBJZTOZJJYAKHQ-UHFFFAOYSA-K iron(3+) phosphate Chemical compound [Fe+3].[O-]P([O-])([O-])=O WBJZTOZJJYAKHQ-UHFFFAOYSA-K 0.000 description 7
- 229910000399 iron(III) phosphate Inorganic materials 0.000 description 7
- 229910052493 LiFePO4 Inorganic materials 0.000 description 6
- 238000007599 discharging Methods 0.000 description 6
- 238000009826 distribution Methods 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 4
- 229910018095 Ni-MH Inorganic materials 0.000 description 2
- 229910018477 Ni—MH Inorganic materials 0.000 description 2
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 230000003203 everyday effect Effects 0.000 description 2
- 239000000446 fuel Substances 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 239000000178 monomer Substances 0.000 description 2
- 238000003860 storage Methods 0.000 description 2
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 238000003908 quality control method Methods 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
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Abstract
The utility model provides a lithium-ion battery and lead-acid battery hybrid system. The system comprises a lithium-ion battery pack and a lead-acid battery pack, wherein the lithium-ion battery pack is formed by serial connection, parallel connection or serial and parallel mixed connection of a plurality of lithium batteries, and the lead-acid battery pack is formed by serial connection of a plurality of lead-acid batteries; the lithium-ion battery pack and the lead-acid battery pack are connected in parallel to form a hybrid system module; and the hybrid battery system comprises one or more hybrid system modules. Compared with pure lead-acid battery system, the hybrid system has the advantage that electrical property characteristics such as constant power discharge, high power pulse discharge, the cycle lifeand the like are improved significantly.
Description
Technical field
The utility model relates to different electrochemical system battery hybrid systems, specially refers to the application in low-speed electronic automobile, electric automobile field of lithium ion battery and lead-acid battery hybrid system.
Background technology
In recent years, Domestic Automotive Industry fast development, wherein in car, the ratio of home-use car accounts for more than 60%, and the distance travelled of every day is mostly in 50 kilometer range, and playground is also mainly at downtown roads, and average overall travel speed is 50-60 kilometer/hour.By 12000 kilometers of calculating of each home-use car year operation, 800 liters of the minimum fuel consumption of fuel-engined vehicle, if there is 20% home-use car to change electric passenger vehicle into, annual fuel consumption of saving is huge.Due to the restriction of existing battery technology, even if there is the government subsidy of great number, current electric automobile cost performance is still very limited, development " low-speed electronic automobile " is as transition of trend " electric automobile "---and more feasible and social cost is smaller, this is to be more suitable for Chinese electric automobile realizing route.
Electromobile battery mainly contains: lead-acid battery, Ni-MH battery, lithium ion battery etc., consider that equal capacity Ni-MH battery price is more than the twice of lead-acid battery, the cost of lithium ion battery is higher, on low-speed electronic automobile accessories take lead-acid battery as main.
The advantage of lead-acid battery:
Safe and reliable, voltage platform is better, and mature production technology is cheap, abundant raw materials and can reclaiming utilization.
The shortcoming of lead-acid battery:
1, all lower (being generally 35Wh/kg and 70Wh/L) of specific energy and volumetric specific energy;
2, self-discharge rate higher (reducing by 1% every day under the condition of 25 ℃ of ambient temperatures);
3, cycle life relatively low (deeply fill and deeply put cycle-index ≈ 300 times);
4, because sulfuric acid corrosion electrode is not easy to long term storage, be not suitable for heavy-current discharge, under the operating state of high-power and heavy-current discharge, the battery actual average operating time significantly reduces, and does not reach user's specification especially.
Having the following advantages of lithium ion battery:
1, there is higher specific energy 120Wh/Kg, volumetric specific energy 300Wh/L;
2, voltage is high, and self discharge is little, can long storage time;
3, extra long life, particularly ferric phosphate lithium cell, under 25 ℃ of environment, 1C charge and discharge circulation life reaches more than 1500 times.
Lithium ion battery there is following shortcoming:
1, lithium ion battery safety performance is poor, particularly the in the situation that of heavy-current discharge or charging;
2, the too high even security incident of lithium ion battery bulging that easily makes of charging voltage, causes and cannot use, and plate needs protection in use.
In a word, current battery technology is not perfect, in current electric automobile field, cannot between F-Zero, charging times and battery cost, reach gratifying level simultaneously.
Summary of the invention
The purpose of this utility model is in order to overcome lead-acid battery and lithium ion battery the deficiencies in the prior art, the hybrid system of a kind of lithium ion battery and lead-acid battery combination is provided, contrast pure Acid Battery System, hybrid system has significant lifting in electrical property features such as permanent power discharge, highpowerpulse electric discharge and cycle lives.For this reason, the utility model is by the following technical solutions:
By a hybrid system for lithium ion battery and lead-acid battery combination, it is characterized in that: it comprises
Lithium ion battery group, is formed by series, parallel or series-parallel connection by multiple lithium batteries;
Lead-acid battery group, is formed by series connection by multiple lead-acid batteries;
Described lithium ion battery group and described lead-acid battery group formation in parallel hybrid system module;
Described hybrid battery system contains one or more above-mentioned hybrid system modules.
Owing to adopting the technical solution of the utility model, according to the battery of two kinds of different electrochemical systems of lithium ion battery and lead-acid battery at different SOC(State Of Charge, charged state) DC internal resistance, OCV(Open Circuit Voltage under state), the difference of other electrical properties, in hybrid system module, the electric current in lithium ion battery group and lead-acid battery group loop can automatically regulate under different SOC states, prevents that lithium ion battery from occurring overcharging, crossing and the abuse phenomenon such as put; And in the process of shelving, the meeting of lithium ion battery group and lead-acid battery group are carried out mutual automatic equalization, are conducive to slow down failure mode and disable velocity between cell, thereby improve the consistency of cell; Hybrid system module will obviously be better than pure lead-acid battery module in the performance such as heavy-current discharge, cycle life simultaneously.
Wherein, the compound mode of multiple hybrid system modules comprises " first in parallel after series connection " compound mode or " first series connection after parallel connection " compound mode.Like this, this hybrid system is all to be combined by the series-parallel connection of hybrid system module, is convenient to the isoparametric monitoring of voltage, electric current, temperature of whole hybrid system inside; The installation of the hybrid system module of hybrid system inside is convenient with replacing; Combine the parameter such as capacity, overall dimension of reduction cell that can be suitable by series-parallel connection, be conducive to conforming lifting between the quality control of cell and battery; For serial hybrid system after hybrid system in parallel after first connecting or first parallel connection, the unit for electrical property parameters of hybrid system will obviously be better than pure Acid Battery System.
Further, in hybrid system module, the capacity of lithium ion battery accounts for 5%-40% of lead-acid battery capacity, and optimum value is 10%-20%.
Further, in hybrid system module, the charge-discharge magnification of lithium ion battery is required to meet:
C’=[(1+x)C
lead×N×n]÷（C
lead×x）
C
lead: lead-acid battery nominal capacity;
X: lithium ion battery nominal capacity accounts for lead-acid battery nominal capacity ratio, 5%≤x≤40%;
C
lead× (1+x): the nominal capacity of hybrid system module;
N: the charge-discharge magnification of hybrid battery system in actual condition uses, 0 < N≤3;
N: hybrid system module accounts for the ratio of total current in charge and discharge process by the electric current of lithium ion battery branch road, 0 < n < 0.6;
I
li: by the electric current of lithium ion branch road, I
li=(1+x) × C
lead× N × n;
C ': the charge-discharge magnification of lithium ion battery.
In technique scheme, this hybrid system module is in identical permanent power discharge test, when lithium ion battery nominal capacity account for lead-acid battery nominal capacity 5% time, the permanent power discharge time of this hybrid system module exceeded more than 5% than the permanent power discharge time of pure lead-acid battery module; When lithium ion battery nominal capacity account for lead-acid battery nominal capacity 40% time, the permanent power discharge time of this hybrid system module exceeded more than 50% than the permanent power discharge time of pure lead-acid battery module; In high current pulsed discharge test, when lithium ion battery nominal capacity account for lead-acid battery nominal capacity 5% time, the average power of the high current pulsed discharge of the pure lead-acid battery module of average power ratio of the high current pulsed discharge of this hybrid system module exceeds more than 5%; When lithium ion battery nominal capacity account for lead-acid battery nominal capacity 40% time, the average power of the high current pulsed discharge of the pure lead-acid battery module of average power ratio of the high current pulsed discharge of this hybrid system module exceeds more than 40%; At 100%DOD(DOD:Depth Of Discharge) in degree of depth loop test, the cycle-index of the pure lead-acid battery module of cycle ratio of its hybrid system module will exceed 40%-60%.
In technique scheme, when the nominal capacity of lithium ion battery account for lead-acid battery nominal capacity 10% time, hybrid system is compared with pure Acid Battery System, the former has promoted approximately 15.0% in the discharge time of permanent power test; Promote approximately 13.0% in the average power of high current pulsed discharge; In 100%DOD degree of depth loop test, cycle life has promoted approximately 50.0%
Accompanying drawing explanation
Fig. 1 is the structural representation of the utility model hybrid system module;
Fig. 2 is lithium ion battery charge/discharge state DC internal resistance variation diagram under different SOC states of embodiment 2 provided by the utility model;
Fig. 3 is lead-acid battery charge/discharge state DC internal resistance variation diagram under different SOC states of embodiment 2 provided by the utility model;
Fig. 4 is hybrid system module lithium ion battery branch road and the lead-acid battery branch road charging capacity variation corresponding relation schematic diagram in charging process of embodiment 2 provided by the utility model;
Fig. 5 is hybrid system module lithium ion battery branch road and the lead-acid battery branch road discharge capacity variation corresponding relation schematic diagram in discharge process of embodiment 2 provided by the utility model;
Fig. 6 be the hybrid system module of embodiment 2 provided by the utility model in charging process, the current distributing figure in each branch road of lead-acid battery and lithium ion battery;
Fig. 7 be the hybrid system module of embodiment 2 provided by the utility model in discharge process, the current distributing figure in each branch road of lead-acid battery and lithium ion battery;
Fig. 8 is the hybrid system module of embodiment 2 provided by the utility model and the pure lead-acid battery module charging and discharging curve comparison diagram in same current;
Fig. 9 is the permanent power discharge curve comparison figure of hybrid system module and the pure lead-acid battery module of embodiment 2 provided by the utility model;
Figure 10 is the high current pulsed discharge curve comparison figure of hybrid system module and the pure lead-acid battery module of embodiment 2 provided by the utility model;
Figure 11 is the 100%DOD cycle life test comparison figure of hybrid system module and the pure lead-acid battery module of embodiment 2 provided by the utility model;
Figure 12 is the schematic diagram that the tandem compound of the utility model hybrid system module becomes hybrid battery system;
Figure 13 is the schematic diagram that after the utility model hybrid system module is first connected, parallel combination becomes hybrid battery system;
Figure 14 is the schematic diagram that after the first parallel connection of the utility model hybrid system module, tandem compound becomes hybrid battery system.
Embodiment
In order more clearly to understand above-mentioned purpose of the present utility model, feature and advantage, below in conjunction with the drawings and specific embodiments, the utility model is further described in detail.Be appreciated that the utility model also can adopt other to be different from other modes described here and implement, therefore, the utility model is not limited to the restriction of following public specific embodiment.
Embodiment 1: lithium ion battery nominal capacity accounts for 5% of lead-acid battery nominal capacity.
As shown in Figure 1, the utility model provides a kind of hybrid battery device, comprise: a lithium ion battery group Isosorbide-5-Nitrae LiFePO4 rectangular cell (production firm: Zhejiang Prov NanDou Power motor Co., Ltd, nominal capacity is 10Ah) form lithium ion battery group 1 by series connection; Lead- acid battery group 2,2 lead-acid battery (production firms: Zhejiang Prov NanDou Power motor Co., Ltd, nominal capacity is 200Ah) form lead-acid battery group 2 by series connection, described ferric phosphate lithium cell group 1 composes in parallel hybrid system module 3 with described lead-acid battery group 2.
In technique scheme, under identical testing scheme, testing equipment, test environment conditions, the permanent power discharge time of this utility model hybrid system module has more 5.3% than the permanent power discharge time of pure lead-acid battery module; In 600A continuous discharge interpretation of result in 3 minutes, the average discharge power of its hybrid system module increases by 6.3% than pure lead-acid battery module; In the loop test of 100%DOD state, the cycle-index of the pure lead-acid battery module of the cycle ratio of hybrid system module exceeds 38.8%, and test data is in table 1.
Embodiment 2: lithium ion battery nominal capacity accounts for 10% of lead-acid battery nominal capacity.
As shown in Figure 1, the utility model provides a kind of hybrid battery device, comprising: and a lithium battery group Isosorbide-5-Nitrae LiFePO4 rectangular cell (production firm: Zhejiang Prov NanDou Power motor Co., Ltd, nominal capacity is 20Ah) form lithium battery group 1 by series connection; Lead- acid battery group 2,2 lead-acid battery (production firms: Zhejiang Prov NanDou Power motor Co., Ltd, nominal capacity is 200Ah) form lead-acid battery group 2 by series connection, described ferric phosphate lithium cell group 1 composes in parallel hybrid system module 3 with described lead-acid battery group 2.
In technique scheme, in the constant current charge stage of hybrid system module, charging current is distributed between lithium ion battery group and lead-acid battery group automatically, when lead-acid battery charges to 5%SOC-35%SOC, the charging of lithium ion battery group completes 5%-95%SOC, in constant current charge later stage and the constant voltage charge stage of hybrid system, charging current is mainly charged to lead-acid battery group 2, thereby play the effect that prevents that lithium ion battery from overcharging, as shown in Figure 4 and Figure 6, wherein in Fig. 4, charging capacity changes in distribution situation in each battery pack branch road in the charging measurement of hybrid system module in embodiment 2, 4-01 represents 4 string LFP battery pack branch roads charging capacity in different time, 4-02 represents 2 string lead-acid battery group branch roads charging capacity in different time, 4-03 represents the charging capacity change curve of 4 string LFP battery pack, 4-04 represents the charging change curve of 2 string lead-acid battery groups.In Fig. 6, CURRENT DISTRIBUTION situation of change in each battery pack branch road in the charging measurement of hybrid system module in embodiment 2,6-01 is illustrated in constant current 73.3A charging process by the curent change curve of 2 string lead-acid battery group branch roads, 6-02 is illustrated in constant current 73.3A charging process by the curent change curve of 4 string LFP battery pack branch roads, 6-03 is illustrated in the curent change curve that passes through 2 string lead-acid battery group branch roads in constant current 150A charging process, and 6-04 is illustrated in constant current 150A charging process by the curent change curve of 4 string LFP battery pack branch roads.And in constant current or permanent power discharge stage of hybrid system, electric current is distributed between lithium ion battery group and lead-acid battery group automatically, lithium ion battery shunting accounts for 30%-60% of total current, and gradually reduce, in the time that lithium ion battery completes electric discharge, lead-acid battery discharge capacity accounts for the 5%SOC-40%SOC of its nominal capacity, in the electric discharge middle and later periods, discharging current is by lead-acid battery branch road, as shown in Fig. 5 and Fig. 7, wherein in Fig. 5, discharge capacity changes in distribution situation in each battery pack branch road in the discharge test of hybrid system module in embodiment 2, 5-01 represents 2 string lead-acid battery group branch roads discharge capacity in different time, 5-02 represents 4 string LFP battery pack branch roads discharge capacity in different time, 5-03 represents the discharge capacity change curve of 4 string LFP battery pack, 5-04 represents the electric discharge change curve of 2 string lead-acid battery groups.In Fig. 7, CURRENT DISTRIBUTION situation of change in each battery pack branch road in the discharge test of hybrid system module in embodiment 2,7-01 is illustrated in constant current 73.3A discharge process by the curent change curve of 4 string LFP battery pack branch roads, 7-02 is illustrated in constant current 73.3A discharge process by the curent change curve of 2 string lead-acid battery group branch roads, 7-03 is illustrated in the curent change curve that passes through 4 string LFP battery pack branch roads in constant current 150A discharge process, and 7-04 is illustrated in constant current 150A discharge process by the curent change curve of 2 string lead-acid battery group branch roads.
In technique scheme, selecting monomer lead-acid battery and monomer lithium ion battery important technological parameters is DC internal resistance, OCV.The DC internal resistance of lithium ion battery under different SOC states comprises Charging state DC internal resistance and electric discharge state DC internal resistance, lithium ion battery 10%SOC-90%SOC Charging state DC internal resistance is greater than the internal resistance of lead-acid battery 10%SOC-70%SOC Charging state, lithium ion battery 10%SOC-90%SOC electric discharge state DC internal resistance is greater than lead-acid battery 10%SOC-90%SOC electric discharge state DC internal resistance, as shown in Figures 2 and 3.Fig. 2 represents the change curve under the corresponding different SOC states of the DC internal resistance of 4 string LFP battery pack, and 2-01 represents the change curve under the corresponding different SOC states of Charging state DC internal resistance, and 2-02 represents the change curve discharging under the corresponding different SOC states of state DC internal resistance; Fig. 3 represents the change curve under the corresponding different SOC states of the DC internal resistance of 2 string lead-acid battery groups, and 3-01 represents the change curve under the corresponding different SOC states of Charging state DC internal resistance, and 3-02 represents the change curve discharging under the corresponding different SOC states of state DC internal resistance.
In technique scheme, under identical testing scheme, testing equipment, test environment conditions, the permanent power discharge time of this utility model hybrid system module has more 12.6% than the permanent power discharge time of pure lead-acid battery module.As shown in Figure 9, Fig. 9 represents that in embodiment 2, hybrid system module and lead-acid battery group are in the contrast of permanent power discharge curve, and 9-01 represents the permanent power discharge curve of hybrid system module, and 9-02 represents the permanent power discharge curve of lead-acid battery group; In 600A continuous discharge interpretation of result in 3 minutes, the average discharge power of its hybrid system module increases by 10.0% than pure lead-acid battery module.As shown in figure 10, Figure 10 represents in embodiment 2 that hybrid system module and lead-acid battery group contrast at high current pulsed discharge test curve, 10-01 represents the high current pulsed discharge curve of hybrid system module, and 10-02 represents the high current pulsed discharge curve of lead-acid battery group; In the loop test of 100%DOD state, the cycle-index of the pure lead-acid battery module of the cycle ratio of hybrid system module exceeds 45.2%, and test data is in table 1.As shown in figure 11, Figure 11 represents hybrid system module and lead-acid battery cycle life test curve contrast under 100%DOD state in embodiment 2, and 11-01 represents hybrid system module cycle life test curve, and 11-02 represents lead-acid battery cycle life test curve.
In technique scheme, the embodiment of this utility model hybrid system module can draw at charging later stage and electric discharge initial stage in the discharge test of volume test, different batteries, significantly variation of voltage platform appearance, as shown in Figure 8.Fig. 8 represents hybrid system module and the charging and discharging curve contrast of lead-acid battery group under identical charging and discharging currents test in embodiment 2.8-01 represents the charging curve of lead-acid battery group, and 8-02 represents the discharge curve of lead-acid battery group, and 8-03 represents the charging curve of hybrid system module, and 8-04 represents the discharge curve of hybrid system module.
Embodiment 3: lithium ion battery nominal capacity accounts for 40% of lead-acid battery nominal capacity.
As shown in Figure 1, the utility model provides a kind of hybrid battery device, comprising: and a lithium battery group Isosorbide-5-Nitrae LiFePO4 rectangular cell (production firm: Zhejiang Prov NanDou Power motor Co., Ltd, nominal capacity is 80Ah) form lithium battery group 1 by series connection; Lead- acid battery group 2,2 lead-acid battery (production firms: Zhejiang Prov NanDou Power motor Co., Ltd, nominal capacity is 200Ah) form lead-acid battery group 2 by series connection, described ferric phosphate lithium cell group 1 composes in parallel hybrid system module 3 with described lead-acid battery group 2.
In technique scheme, under identical testing scheme, testing equipment, test environment conditions, the permanent power discharge time of this utility model hybrid system module has more 50.9% than the permanent power discharge time of pure lead-acid battery module; In 600A continuous discharge interpretation of result in 3 minutes, the average discharge power of its hybrid system module increases by 44.7% than pure lead-acid battery module; In the loop test of 100%DOD state, the cycle-index of the pure lead-acid battery module of the cycle ratio of hybrid system module exceeds 59.0%, and test data is in table 1.
Embodiment 4: hybrid system module tandem compound becomes hybrid system.
As shown in figure 12, the utility model provides a kind of hybrid system, comprising: and a lithium battery group Isosorbide-5-Nitrae LiFePO4 rectangular cell (production firm: Zhejiang Prov NanDou Power motor Co., Ltd, nominal capacity is 20Ah) form lithium battery group 1 by series connection; Lead- acid battery group 2,2 lead-acid battery (production firms: Zhejiang Prov NanDou Power motor Co., Ltd, nominal capacity is 200Ah) form lead-acid battery group 2 by series connection, described ferric phosphate lithium cell group 1 composes in parallel hybrid system module 3 with described lead-acid battery group 2, then becomes hybrid system 4 by 3 hybrid system module 3 tandem compounds.
In technique scheme, under identical testing scheme, testing equipment, test environment conditions, the permanent power discharge time of this hybrid system 4 has more 15.6% than the permanent power discharge time of pure Acid Battery System; In 600A continuous discharge interpretation of result in 3 minutes, the average discharge power of this hybrid system 4 increases by 12.3% than pure Acid Battery System; In the loop test of 100%DOD state, the cycle-index of the pure Acid Battery System of cycle ratio of this hybrid system 4 exceeds 48.0%, and test data is in table 1.
Embodiment 5: hybrid system module first connect after parallel combination hybrid system.
As shown in figure 13, the utility model provides a kind of hybrid system, comprising: and a lithium battery group Isosorbide-5-Nitrae LiFePO4 rectangular cell (production firm: Zhejiang Prov NanDou Power motor Co., Ltd, nominal capacity is 5Ah) form lithium battery group 1 by series connection; Lead- acid battery group 2,2 lead-acid battery (production firms: Zhejiang Prov NanDou Power motor Co., Ltd, nominal capacity is 50Ah) form lead-acid battery group 2 by series connection, described ferric phosphate lithium cell group 1 composes in parallel hybrid system module 3 with described lead-acid battery group 2, become hybrid system 5 by 3 hybrid system module 3 tandem compounds, then become hybrid system 6 by 4 hybrid system 5 parallel combinations.
In technique scheme, under identical testing scheme, testing equipment, test environment conditions, the permanent power discharge time of this hybrid system 6 has more 16.1% than the permanent power discharge time of pure lead-acid battery; In 600A continuous discharge interpretation of result in 3 minutes, the average discharge power of this hybrid system 6 increases by 13.2% than pure lead-acid battery; In the loop test of 100%DOD state, the cycle-index of the pure lead-acid battery of cycle ratio of this hybrid system 6 exceeds 50.1%, and test data is in table 1.
Embodiment 6: hybrid system module first rear tandem compound in parallel becomes hybrid system.
As shown in figure 14, the utility model provides a kind of hybrid system, comprising: and a lithium battery group Isosorbide-5-Nitrae LiFePO4 rectangular cell (production firm: Zhejiang Prov NanDou Power motor Co., Ltd, nominal capacity is 5Ah) form lithium battery group 1 by series connection; Lead- acid battery group 2,2 lead-acid battery (production firms: Zhejiang Prov NanDou Power motor Co., Ltd, nominal capacity is 50Ah) form lead-acid battery group 2 by series connection, described ferric phosphate lithium cell group 1 composes in parallel hybrid system module 3 with described lead-acid battery group 2, become hybrid system 7 by 4 hybrid system module 3 parallel combinations, then become hybrid system 8 by 3 hybrid system 7 tandem compounds.
In technique scheme, under identical testing scheme, testing equipment, test environment conditions, the permanent power discharge time of this hybrid system 8 has more 15.9% than the permanent power discharge time of pure lead-acid battery; In 600A continuous discharge interpretation of result in 3 minutes, the average discharge power of this hybrid system 8 increases by 12.7% than pure lead-acid battery; In the loop test of 100%DOD state, the cycle-index of the pure lead-acid battery of cycle ratio of this hybrid system 8 exceeds 50.3%, and test data is in table 1.
Table 1: embodiment evaluates the contrast of contrast test project data
Claims (7)
1. lithium ion battery and a lead-acid battery hybrid system, is characterized in that: described hybrid system comprises:
Lithium ion battery group, is formed by series, parallel or series-parallel connection by multiple lithium batteries;
Lead-acid battery group, is formed by series connection by multiple lead-acid batteries;
Described lithium ion battery group and described lead-acid battery group formation in parallel hybrid system module;
Described hybrid battery system contains one or more described hybrid system modules.
2. a kind of lithium ion battery according to claim 1 and lead-acid battery hybrid system, is characterized in that: lithium ion battery nominal capacity accounts for 5%-40% of lead-acid battery nominal capacity.
3. a kind of lithium ion battery according to claim 1 and lead-acid battery hybrid system, is characterized in that: in hybrid system module, to account for the optimum value of lead-acid battery nominal capacity be 10%-20% to lithium ion battery nominal capacity.
4. a kind of lithium ion battery according to claim 1 and lead-acid battery hybrid system, is characterized in that: in hybrid system module, the charge-discharge magnification of lithium ion battery is required to meet: C '=[(1+x) C
lead× N × n] ÷ (C
lead× x)
C
lead: lead-acid battery nominal capacity;
X: lithium ion battery nominal capacity accounts for lead-acid battery nominal capacity ratio, 5%≤x≤40%;
C
lead× (1+x): the nominal capacity of hybrid system module;
N: the charge-discharge magnification of hybrid battery system in actual condition uses, 0 < N≤3;
N: hybrid system module accounts for the ratio of total current in charge and discharge process by the electric current of lithium ion battery branch road, 0 < n < 0.6;
I
li: by the electric current of lithium ion branch road, I
li=(1+x) × C
lead× N × n;
C ': the charge-discharge magnification of lithium ion battery.
5. a kind of lithium ion battery according to claim 1 and lead-acid battery hybrid system, it is characterized in that: in hybrid system module, the parameter that discharges and recharges of lead-acid battery and lithium ion battery meets, in the constant current charge stage of hybrid battery system, when lead-acid battery charges to 5%SOC-35%SOC, the charging of lithium ion battery completes 5%SOC-95%SOC, and in constant current or permanent power discharge stage of hybrid battery system, lithium ion battery shunting accounts for 30%-60% of total current, and gradually reduce, in the time that lithium ion battery completes electric discharge, lead-acid battery discharge capacity accounts for the 5%SOC-40%SOC of its nominal capacity.
6. a kind of lithium ion battery according to claim 1 and lead-acid battery hybrid system, it is characterized in that: in hybrid system module, the DC internal resistance of lithium ion battery under different SOC states comprises Charging state DC internal resistance and electric discharge state DC internal resistance, the DC internal resistance that discharges and recharges of lead-acid battery and lithium ion battery meets: lithium ion battery 10%SOC-90%SOC Charging state DC internal resistance is greater than the internal resistance of lead-acid battery 10%SOC-70%SOC Charging state, and lithium ion battery 10%SOC-90%SOC electric discharge state DC internal resistance is greater than lead-acid battery 10%SOC-90%SOC electric discharge state DC internal resistance.
7. according to a kind of lithium ion battery and lead-acid battery hybrid system described in claim 1,2,3,4,5 or 6, it is characterized in that: described hybrid battery system contains multiple described hybrid system modules, the compound mode of multiple hybrid system modules adopts " in parallel after first connecting " compound mode or " first rear series connection in parallel " compound mode.
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105048538A (en) * | 2015-07-07 | 2015-11-11 | 国网上海市电力公司 | Storage battery system of distribution automatic terminal and testing method thereof |
| WO2016123969A1 (en) * | 2015-02-06 | 2016-08-11 | 中兴通讯股份有限公司 | Storage battery device, and charging-discharging monitoring method, device and system thereof |
| CN108140868A (en) * | 2015-09-29 | 2018-06-08 | 株式会社村田制作所 | Accumulator group |
| CN108988372A (en) * | 2018-07-30 | 2018-12-11 | 内蒙古工业大学 | The Poewr control method and device of the mixed energy storage system of directly driven wind-powered unit |
| US10770914B2 (en) | 2018-11-05 | 2020-09-08 | C.E. Niehoff & Co. | Dual control loop for charging of batteries |
| CN115037020A (en) * | 2022-08-12 | 2022-09-09 | 四川嘉逸新能源科技有限公司 | Photovoltaic electric vehicle charging method and photovoltaic electric vehicle |
| US11811248B2 (en) | 2016-07-21 | 2023-11-07 | C.E. Niehoff & Co. | Vehicle generator using battery charging profiles |
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2013
- 2013-11-08 CN CN201320703561.9U patent/CN203674347U/en not_active Expired - Lifetime
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
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| WO2016123969A1 (en) * | 2015-02-06 | 2016-08-11 | 中兴通讯股份有限公司 | Storage battery device, and charging-discharging monitoring method, device and system thereof |
| US10784541B2 (en) | 2015-02-06 | 2020-09-22 | Zte Corporation | Storage battery device, and charging-discharging monitoring method, device and system thereof |
| CN105048538A (en) * | 2015-07-07 | 2015-11-11 | 国网上海市电力公司 | Storage battery system of distribution automatic terminal and testing method thereof |
| CN108140868A (en) * | 2015-09-29 | 2018-06-08 | 株式会社村田制作所 | Accumulator group |
| CN108140868B (en) * | 2015-09-29 | 2021-03-23 | 株式会社村田制作所 | Accumulator battery |
| US11811248B2 (en) | 2016-07-21 | 2023-11-07 | C.E. Niehoff & Co. | Vehicle generator using battery charging profiles |
| CN108988372A (en) * | 2018-07-30 | 2018-12-11 | 内蒙古工业大学 | The Poewr control method and device of the mixed energy storage system of directly driven wind-powered unit |
| US10770914B2 (en) | 2018-11-05 | 2020-09-08 | C.E. Niehoff & Co. | Dual control loop for charging of batteries |
| CN115037020A (en) * | 2022-08-12 | 2022-09-09 | 四川嘉逸新能源科技有限公司 | Photovoltaic electric vehicle charging method and photovoltaic electric vehicle |
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