CN203983422U - The large electric current lithium ion battery group with self-protection function and extensibility - Google Patents

The large electric current lithium ion battery group with self-protection function and extensibility Download PDF

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Publication number
CN203983422U
CN203983422U CN201420397175.6U CN201420397175U CN203983422U CN 203983422 U CN203983422 U CN 203983422U CN 201420397175 U CN201420397175 U CN 201420397175U CN 203983422 U CN203983422 U CN 203983422U
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lithium
battery
ion battery
cell stack
lithium ion
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CN201420397175.6U
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吴晓东
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Taizhou new Amperex Technology Limited
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SUZHOU SINLION BATTERY CO Ltd
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    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02EREDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/10Energy storage using batteries

Abstract

The utility model discloses a kind of large electric current lithium ion battery group with self-protection function and extensibility, comprising: the battery strings being formed by some lithium-ion cell stack series connection; The major loop high-current switch of connecting with this battery strings; In order to control the ON-OFF control circuit module of this major loop high-current switch conducting or disconnection, this ON-OFF control circuit module and this battery series-parallel connection; Control module, in order to the internal temperature of the terminal voltage according to this battery strings, this lithium ion battery group and any one in the size of current in this lithium ion battery group major loop whether in tolerance interval and control this major loop high-current switch and connect or disconnect; And this lithium ion battery group is also connected with charging module.The utility model can effectively be stopped the problems such as lithium ion battery group terminal voltage is too high, internal temperature is too high, electric current is excessive, battery cell overcharges or excessively put, and realizes the self-protection of lithium ion battery group, promotes and expand the serviceability of lithium ion battery group.

Description

The large electric current lithium ion battery group with self-protection function and extensibility
Technical field
The utility model relates to a kind of lithium ion battery group, and particularly a kind of large electric current lithium ion battery group with self-protection function and extensibility, belongs to technical field of new energies.
Background technology
Lithium ion battery is as the extensive use in a plurality of fields such as industry, agricultural, traffic of a kind of high performance energy storage device at present.Lithium ion battery is in charge and discharge process, and Li+ comes and goes and embeds and de-embedding between two electrodes, and wherein, during rechargable battery, Li+, from the de-embedding of positive pole, embeds negative pole through electrolyte, and negative pole is in rich lithium state; Contrary during electric discharge.Yet; existing lithium ion battery group is when application; often can meet with the fault causing because of battery pack terminal voltage is too high, internal temperature is too high, electric current is excessive, some or several battery cell overcharges or excessively put etc.; lithium ion battery group cannot normally be worked; even cause the damage of lithium ion battery group, and existing lithium ion battery group extensibility is poor.
Summary of the invention
For the deficiencies in the prior art, the purpose of this utility model is to provide a kind of large electric current lithium ion battery group with self-protection function and extensibility.
For achieving the above object, the utility model provides following technical scheme:
A large electric current lithium ion battery group with self-protection function and extensibility, comprising:
The battery strings mainly being formed by two above lithium-ion cell stack series connection,
The major loop high-current switch of connecting with described battery strings,
At least in order to control the ON-OFF control circuit module of the conducting of described major loop high-current switch or disconnection, described ON-OFF control circuit module and described battery series-parallel connection,
And control module, at least in order to according to the terminal voltage of described battery strings, any one in the size of current in the internal temperature of described lithium ion battery group and described lithium ion battery group major loop whether in tolerance interval and control described major loop high-current switch and connect or disconnect;
And described lithium ion battery group also with is at least connected in order to the charging module that described lithium ion battery group is charged.
Further, the tolerance interval of the terminal voltage of described battery strings is: the voltage tolerance interval upper limit that is above limited to described lithium-ion cell stack is multiplied by N, under be limited to described lithium-ion cell stack voltage tolerance interval lower limit be multiplied by N, wherein N is the quantity of lithium-ion cell stack in described battery strings.
Further, the tolerance interval of the internal temperature of described lithium ion battery group is: 45 ~ 60 ℃ of the upper limits, lower limit-10 ~ 0 ℃.
Further, the tolerance interval of the main circuit current size of described lithium ion battery group is for being less than or equal to 300A.
The large electric current lithium ion battery group further, with self-protection function and extensibility also comprises:
At least one balance module in parallel with arbitrary lithium-ion cell stack, at least in order to the terminal voltage at described lithium-ion cell stack during higher than set point, the terminal voltage that the electric weight of described lithium-ion cell stack is dissipated to described lithium-ion cell stack is equal to or less than described set point.
Further, the voltage unlatching scope of described balance module is 3.4 ~ 4.8V, and dissipation power is greater than 0.5W.
Further, the absolute value of the difference of the charging total voltage of described charging module and the cut-in voltage sum of each balance module is less than N*0.05mV, the quantity that wherein N is described lithium-ion cell stack.
Further, the scope of accepting of the terminal voltage of described lithium-ion cell stack is than high 0.05 ~ 1.0 V of equalizing voltage.
Further, the scope of accepting of the terminal voltage of described battery strings is than the high 0.05N ~ 1.0N of the equalizing voltage sum V of contained lithium-ion cell stack in described battery strings, and wherein, N is the quantity of lithium-ion cell stack in described battery strings.
Further, described lithium-ion cell stack comprises a lithium-ion battery monomer or two lithium-ion battery monomers that more parallel arranges.
Further, the capacity tolerance that forms each lithium-ion cell stack of described battery strings is less than 5% of arbitrary ion battery heap self capacity wherein.
Further, described major loop high-current switch can be selected from the relay often opened or the large contactor of normal off, but is not limited to this.
Further, described charging module comprises the DC power supply of outside directly access or accesses the rear DC power supply forming by the built-in AC/DC of described battery pack or the conversion of DC/DC modular converter by external power source.
Compared with prior art; advantage of the present utility model comprises: by adopting ON-OFF control circuit module, control module etc. to control major loop high-current switch; and coordinate charging module, balance module etc.; can effectively stop the problems such as large electric current lithium ion battery group terminal voltage is too high, internal temperature is too high, electric current is excessive, battery cell overcharges or excessively put; thereby realize self-protection and the Function Extension of lithium ion battery group, promoted the serviceability of lithium ion battery group.
Accompanying drawing explanation
In order to be illustrated more clearly in the utility model embodiment or technical scheme of the prior art, to the accompanying drawing of required use in embodiment or description of the Prior Art be briefly described below, apparently, the accompanying drawing the following describes is only some embodiment that record in the utility model, for those of ordinary skills, do not paying under the prerequisite of creative work, can also obtain according to these accompanying drawings other accompanying drawing.
Figure 1 shows that a kind of structural representation with the large electric current lithium ion battery group of self-protection function and extensibility in the utility model specific embodiment.
Embodiment
For making the purpose of this utility model, technical scheme and advantage clearer, below in conjunction with accompanying drawing, embodiment of the present utility model is elaborated.The example of these preferred implementations has been carried out illustration in the accompanying drawings.The execution mode of the present utility model of describing shown in accompanying drawing and is with reference to the accompanying drawings only exemplary, and the utility model is not limited to these execution modes.
At this, also it should be noted that, for fear of the details because of unnecessary fuzzy the utility model, only show in the accompanying drawings with according to the closely-related structure of scheme of the present utility model and/or treatment step, and omitted other details little with the utility model relation.
An aspect of the present utility model provides a kind of large electric current lithium ion battery group with self-protection function and extensibility, comprising:
The battery strings mainly being formed by two above lithium-ion cell stack series connection,
The major loop high-current switch of connecting with described battery strings,
At least in order to control the ON-OFF control circuit module of the conducting of described major loop high-current switch or disconnection, described ON-OFF control circuit module and described battery series-parallel connection,
And control module, at least in order to according to the terminal voltage of described battery strings, any one in the size of current in the internal temperature of described lithium ion battery group and described lithium ion battery group major loop whether in tolerance interval and control described major loop high-current switch and connect or disconnect;
And described lithium ion battery group also with is at least connected in order to the charging module that described lithium ion battery group is charged.
An aspect of the present utility model provides a kind of self-protection and charging method of large electric current lithium ion battery group, comprising:
The battery strings mainly being formed by two above lithium-ion cell stack series connection is provided,
The major loop of connecting with described battery strings high-current switch is provided,
ON-OFF control circuit module with described battery series-parallel connection is provided, and with the conducting of major loop high-current switch or disconnection described in described ON-OFF control circuit module controls,
Charging module is provided, in order to described lithium ion battery group is charged, and
Control module is provided, in order to according to the terminal voltage of described battery strings, any one in the size of current in the internal temperature of described lithium ion battery group and described lithium ion battery group major loop whether in tolerance interval and control described major loop high-current switch and connect or disconnect.
Below in conjunction with accompanying drawing and an exemplary embodiments, the technical solution of the utility model is further explained.
For example; refer to Fig. 1; in an embodiment of the present utility model; this large electric current lithium ion battery group (being called for short as follows battery pack) with self-protection function and extensibility is by two above lithium-ion cell stacks (being called for short as follows battery pile), major loop high-current switch; ON-OFF control circuit module, more than two balance module and control module form.Wherein, this battery pack is also connected with charging module.
Wherein, after these two above lithium-ion cell stacks form battery strings by series connection, connect with major loop high-current switch, the power output of whole battery pack is provided;
ON-OFF control circuit module and battery strings are in parallel, and the closed or control of disconnection capable of regulating battery strings to major loop high-current switch of ON-OFF control circuit module;
Control module is in order to control connecting or disconnecting of major loop high-current switch;
Charging module is in order to charge to this battery pack.
Wherein, control module is by checking that whether battery strings both end voltage is at tolerance interval, whether battery pack internal temperature is at tolerance interval, and whether the main circuit current of battery pack itself controls connecting or disconnecting of major loop high-current switch at tolerance interval.
Further, the tolerance interval of the terminal voltage of described battery strings is preferably: the voltage tolerance interval upper limit that is above limited to described lithium-ion cell stack is multiplied by N, under be limited to described lithium-ion cell stack voltage tolerance interval lower limit be multiplied by N, wherein N is the quantity of lithium-ion cell stack in described battery strings, exceed allowed band, control module will be sent signal, and major loop high-current switch is disconnected.
Further, the tolerance interval of the internal temperature of described lithium ion battery group is preferably: 45 ~ 60 ℃ of the upper limits, and lower limit-10 ~ 0 ℃, exceeds allowed band, and control module will signal major loop high-current switch will be disconnected.
Further, the tolerance interval of the main circuit current size of described lithium ion battery group is preferably and is less than or equal to 300A, exceeds allowed band, and control module will signal major loop high-current switch is disconnected.
Further, each lithium-ion cell stack balance module in parallel, described balance module can be in the terminal voltage of described lithium-ion cell stack during higher than set point, and the terminal voltage that the electric weight of corresponding lithium-ion cell stack is dissipated to this lithium-ion cell stack by dissipative element etc. is equal to or less than described set point.
Wherein, the voltage unlatching scope of described balance module is preferably 3.4 ~ 4.8V, and dissipation power is preferably greater than 0.5W.
Wherein, the absolute value of the difference of the charging total voltage of described charging module and the cut-in voltage sum of each balance module is less than N*0.05mV, and wherein N is the quantity of contained lithium-ion cell stack in described battery strings.
Wherein, the scope of accepting of the terminal voltage of described lithium-ion cell stack is than the high 0.05 ~ 1.0V of equalizing voltage.
Wherein, the scope of accepting of the terminal voltage of described battery strings is than the high 0.05N ~ 1.0N of the equalizing voltage sum V of contained lithium-ion cell stack in described battery strings, and wherein, N is the quantity of lithium-ion cell stack in described battery strings.
Wherein, the capacity tolerance that forms each lithium-ion cell stack of described battery strings is less than 5% of arbitrary ion battery heap self capacity wherein.
Wherein, lithium-ion cell stack can be comprised of or some lithium-ion battery monomers compose in parallel a lithium-ion battery monomer.
Wherein, charging module can be the DC power supply that aforementioned charging total voltage requires that meets by the outside directly access of described battery pack, can be also the DC power supply forming by the built-in AC/DC of described battery pack or the conversion of DC/DC modular converter after external power source access.
Wherein, major loop high-current switch can adopt the relay often opened or the large contactor of normal off, but is not limited to this.
Wherein, control module, ON-OFF control circuit module can be both simple switch, also can adopt automatic control module consisting of all kinds of devices with digital processing ability etc.
Finally also it should be noted that, term " comprises ", " comprising " or its any other variant are intended to contain comprising of nonexcludability, thereby the process, method, article or the equipment that make to comprise a series of key elements not only comprise those key elements, but also comprise other key elements of clearly not listing, or be also included as the intrinsic key element of this process, method, article or equipment.

Claims (10)

1. a large electric current lithium ion battery group with self-protection function and extensibility, is characterized in that comprising:
The battery strings mainly being formed by two above lithium-ion cell stack series connection,
The major loop high-current switch of connecting with described battery strings,
At least in order to control the ON-OFF control circuit module of the conducting of described major loop high-current switch or disconnection, described ON-OFF control circuit module and described battery series-parallel connection,
And control module, at least in order to according to the terminal voltage of described battery strings, any one in the size of current in the internal temperature of described lithium ion battery group and described lithium ion battery group major loop whether in tolerance interval and control described major loop high-current switch and connect or disconnect;
And described lithium ion battery group also with is at least connected in order to the charging module that described lithium ion battery group is charged.
2. the large electric current lithium ion battery group with self-protection function and extensibility according to claim 1, is characterized in that:
The tolerance interval of the terminal voltage of described battery strings is: the voltage tolerance interval upper limit that is above limited to described lithium-ion cell stack is multiplied by N, under be limited to described lithium-ion cell stack voltage tolerance interval lower limit be multiplied by N, wherein N is the quantity of lithium-ion cell stack in described battery strings;
The tolerance interval of the internal temperature of described lithium ion battery group is: 45 ~ 60 ℃ of the upper limits, lower limit-10 ~ 0 ℃;
The tolerance interval of the main circuit current size of described lithium ion battery group is for being less than or equal to 300A.
3. the large electric current lithium ion battery group with self-protection function and extensibility according to claim 1, characterized by further comprising:
At least one balance module in parallel with arbitrary lithium-ion cell stack, at least in order to the terminal voltage at described lithium-ion cell stack during higher than set point, the terminal voltage that the electric weight of described lithium-ion cell stack is dissipated to described lithium-ion cell stack is equal to or less than described set point.
4. the large electric current lithium ion battery group with self-protection function and extensibility according to claim 3, is characterized in that the voltage unlatching scope of described balance module is 3.4 ~ 4.8V, and dissipation power is greater than 0.5W.
5. the large electric current lithium ion battery group with self-protection function and extensibility according to claim 3; the absolute value that it is characterized in that the difference of the charging total voltage of described charging module and the cut-in voltage sum of each balance module is less than N*0.05mV, the quantity that wherein N is described lithium-ion cell stack.
6. the large electric current lithium ion battery group with self-protection function and extensibility according to claim 3, is characterized in that the scope of accepting of terminal voltage of described lithium-ion cell stack is than high 0.05 ~ 1.0 V of equalizing voltage.
7. the large electric current lithium ion battery group with self-protection function and extensibility according to claim 3; it is characterized in that the scope of accepting of terminal voltage of described battery strings is than the high 0.05N ~ 1.0N of the equalizing voltage sum V of contained lithium-ion cell stack in described battery strings; wherein, N is the quantity of lithium-ion cell stack in described battery strings.
8. according to the large electric current lithium ion battery group with self-protection function and extensibility described in any one in claim 1-7, it is characterized in that described lithium-ion cell stack comprises a lithium-ion battery monomer or two lithium-ion battery monomers that more parallel arranges.
9. according to the large electric current lithium ion battery group with self-protection function and extensibility described in any one in claim 1-7, the capacity tolerance that it is characterized in that forming each lithium-ion cell stack of described battery strings is less than 5% of arbitrary ion battery heap self capacity wherein.
10. according to the large electric current lithium ion battery group with self-protection function and extensibility described in any one in claim 1-7, it is characterized in that described major loop high-current switch adopts the relay often opened or the large contactor of normal off.
CN201420397175.6U 2014-07-17 2014-07-17 The large electric current lithium ion battery group with self-protection function and extensibility Active CN203983422U (en)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104143663A (en) * 2014-07-17 2014-11-12 苏州纳新新能源科技有限公司 High-current lithium ion battery pack with self-protective function and expansibility
WO2021078262A1 (en) * 2019-10-25 2021-04-29 深圳市道通智能航空技术有限公司 Charging apparatus, charging system and charging method

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104143663A (en) * 2014-07-17 2014-11-12 苏州纳新新能源科技有限公司 High-current lithium ion battery pack with self-protective function and expansibility
WO2021078262A1 (en) * 2019-10-25 2021-04-29 深圳市道通智能航空技术有限公司 Charging apparatus, charging system and charging method

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TR01 Transfer of patent right

Effective date of registration: 20170313

Address after: 225300 Taizhou East high tech Industrial Park, east side of the National Road East (West Road, science and technology on the west side of the road), Jiangsu

Patentee after: Taizhou new Amperex Technology Limited

Address before: 215021 Suzhou Industrial Park, Jiangsu Province alone villa lake higher education zone, if the waterway No. 398

Patentee before: Suzhou Sinlion Battery Co., Ltd.

TR01 Transfer of patent right