CN203839453U - Metal expansion type memory switch protector based lithium battery module - Google Patents

Metal expansion type memory switch protector based lithium battery module Download PDF

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Publication number
CN203839453U
CN203839453U CN201420278305.4U CN201420278305U CN203839453U CN 203839453 U CN203839453 U CN 203839453U CN 201420278305 U CN201420278305 U CN 201420278305U CN 203839453 U CN203839453 U CN 203839453U
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CN
China
Prior art keywords
lithium battery
memory switch
module
expansion
switch protector
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Withdrawn - After Issue
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CN201420278305.4U
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Chinese (zh)
Inventor
樊朝晖
瞿洪桂
贾尚碧
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ZHONGTOU XIANNENG TECHNOLOGY (SUZHOU) Co Ltd
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ZHONGTOU XIANNENG TECHNOLOGY (SUZHOU) Co Ltd
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Priority to CN201420278305.4U priority Critical patent/CN203839453U/en
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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 metal expansion type memory switch protector based lithium battery module. The metal expansion type memory switch protector based lithium battery module comprises a module housing which is provided with an anode polar column and a cathode polar column; the module housing is divided into a left chamber and a right chamber; a battery pack which is formed by four lithium battery cells through series connection is arranged in the left chamber which is filled with a thermal insulating layer; a metal expansion type memory switch protector is arranged in the right chamber; a cathode of the battery pack is connected with the cathode polar column; an anode of the battery pack is connected with the anode polar column through the metal expansion type memory switch protector; the metal expansion type memory switch protector comprises five cell monitoring signal receiving ends which are connected with anodes and cathodes of the four lithium battery cells in turn; the module housing is provided with an emergency manual recovery button. According to the metal expansion type memory switch protector based lithium battery module, the modular processing is performed on lithium batteries through the metal expansion type memory switch protector and accordingly the direct application can be performed, the series and parallel connection application within a certain range can also be performed, the use is safe and reliable and simple and durable, and the traditional complex use mode of lithium battery packs is thoroughly overturned.

Description

Lithium battery module based on expansion of metal formula memory switch protector
Technical field
The utility model relates to a kind of lithium battery, relates in particular to a kind of lithium battery module based on expansion of metal formula memory switch protector.
Background technology
Nowadays, power lithium-ion battery is applied in the middle of various device more and more widely, comprises automobile, UPS, electric power energy storage, field use.It is large that it has capacity, and the advantage that volume is little is progressively substituting traditional lead-acid battery, is the main flow in current battery market.But lithium ion battery, when the abnormal conditions such as run into short circuit, overcharge, easily causes that battery acutely heats up, if now there is no safeguard measure, will blast, the serious accident such as burning, this is also one of main technological difficulties of current lithium ion battery.So the necessary solar obligation overvoltage of lithium ion battery, excess temperature, overcurrent protective device, to guarantee the safe operation of battery.
In applications such as mobile phone, electric tools, be to adopt special circuit to detect the relevant parameters such as voltage, charging and discharging currents of battery.When these parameters surpass limit value, thereby disconnect the charging and discharging circuit that the switching devices such as relay, MOSFETs, IGBT cut off battery, battery stops discharging and recharging, to be guaranteed the safe operation of battery.Although disconnect the switching device applying flexibles such as relay, MOSFETs, be swift in motion, but because peripheral control and drive circuit are complicated, cause the global reliability of system lower, and there is the problems such as poor anti jamming capability, resistance to rush of current ability in the semiconductor device such as MOSFETs, IGBT; Relay has the defects such as slow movement, drive current is large, device volume is huge.
Existing lithium ion battery group is in process in groups, and control point is very many, power lithium-ion battery in needs connection in series-parallel is used, manage very complicated, a set of battery pack system often, it is over half that the cost of protection system accounts for total cost.On the other hand, at electric tool, electric bicycle, the applications such as small-sized energy storage just can reach the desired voltage of application and capacity owing to must using the battery core of some to carry out connection in series-parallel, but above-mentioned relay, MOSFETs, the switching device life-spans such as IGBT are short, poor stability, a little less than antijamming capability, the defects such as high-voltage resistance capability is weak, the moment of the orthodox car igniting of using as 12V storage battery, peak current reaches 400A, generally, be difficult to traditional protection device and can have born this surge current, as MOSFET is often impacted by this class surge current, easily damage.
In sum, the defect because the overvoltage of existing lithium ion battery, excess temperature, overcurrent protective device exist, has seriously limited the application and development of lithium ion battery in fields such as automobile, UPS, electric power energy storage, field uses.At present the physical protection device of battery being replaced to traditional protection device has become a new research direction, mentions that expansion of metal formula memory switch protector adopts two gold plaques in marmem as break protective switch in the utility model.According to object rising-heat contracting-cold principle, rising-heat contracting-cold is the general character of object, but the degree varies sample of its rising-heat contracting-cold of different objects.The two sides of two gold plaques is conductors of different material, thereby at the temperature changing, because both-sided conductor expansion-contraction degree is different, makes two gold plaques crooked, encounters contact or the switch of setting, and the circuit (protection) of setting is started working.
Utility model content
The defect existing for overcoming prior art, the purpose of this utility model is to provide a kind of safe, reliable, durable normalized lithium battery modules, can be applicable to field widely.
For realizing above-mentioned technical purpose, reach above-mentioned technique effect, the utility model is achieved through the following technical solutions:
A kind of lithium battery module based on expansion of metal formula memory switch protector, comprise a module shell, described module shell inside is divided into left chamber and right chamber, in described left chamber, be provided with the battery pack that the lithium battery electric core by 4 12V is in series, between described battery pack and described left chamber, be filled with insulating layer, in described right chamber, be provided with an expansion of metal formula memory switch protector, be positioned on the described module shell of described left chamber top and be provided with negative pole pole, be positioned on the described module shell of right chamber top and be provided with Positive Poles, the negative pole of described battery pack is connected with described negative pole pole, the positive pole of described battery pack is connected with the input of described expansion of metal formula memory switch protector, the output of described expansion of metal formula memory switch protector is connected with described Positive Poles, described expansion of metal formula memory switch protector comprises 5 battery core monitor signal receiving terminals, 5 described battery core monitor signal receiving terminals are connected in turn on the both positive and negative polarity of 4 described lithium battery electric cores, carry out Real-Time Monitoring, on described module shell, be provided with an emergency manual recovery button, described emergency manual recovery button is connected with described expansion of metal formula memory switch protector.
Further, described expansion of metal formula memory switch protector is comprised of with electric heating control module switch module, 2 ceramic heaters and battery core monitoring; Described switch module comprises a switch housing, described switch housing inside is provided with an aluminium heat-conducting plate and a memorial alloy switch, described memorial alloy switch consists of movable contact end and stationary contact end, described movable contact end is made by two gold plaques, and the switching of described movable contact end and described stationary contact end is determined by the temperature in described switch housing; The fire end of two described ceramic heaters and described aluminium heat-conducting plate close contact, in described battery core monitoring and electric heating control module, comprise 5 battery core monitor signal receiving terminals and 2 heating signal outputs, 2 described heating signal outputs are electrically connected to two described ceramic heaters respectively, and 5 described battery core monitor signal receiving terminals are electrically connected to the both positive and negative polarity of described 4 lithium battery electric cores successively; One end of described memorial alloy switch is connected with described Positive Poles, and the other end is connected with the positive pole of described battery pack, and the pole of positive and negative electrode described in application directly connects load and forms loop; Described expansion of metal formula memory switch protector is last barrier, under extreme conditions turn-offs battery and thoroughly protects.
Further, described module shell adopts fire proofing.
Further, in 2 described ceramic heaters, one is primary heater, and another is auxiliary heater.
Further, battery core monitoring can also overcharge inhibition by gathering the euqalizing current of described lithium battery electric core or described lithium battery module with electric heating control module, during charging, suppresses electric current and produces, and battery is carried out to equilibrium reparation; Extreme abnormal charging meeting finally triggers memory switch and thoroughly protects, and certainly recovers backsight battery and repairs situation, until repaired, memory switch can recover to allow battery enter normal work.
Further, in described battery core monitoring and electric heating control module, comprise 2 communication interfaces, described communication interface can be photoelectrical coupler signaling interface, RS232 interface or 485 interfaces etc., all can realize described lithium battery module and neutralize other module communication in connection in series-parallel, also can link and communicate by letter with charger, controller simultaneously, even can communicate with intelligent load, signal transmission, show battery status, battery core state, for large-scale series-parallel intelligent monitoring, promote accurate control ability.
Further, described movable contact end and described stationary contact end top layer are silver-plated.
Further, the standardized module that described lithium battery module is 12V, can realize the connection in series-parallel of a plurality of described lithium battery modules and use, and thoroughly abandons traditional sophisticated electronic BMS.
Compared with prior art, the beneficial effects of the utility model are:
1, lithium battery module of the present utility model has adopted expansion of metal formula memory switch protector; when lithium ion battery is running into short circuit meeting and cut off rapidly the charge-discharge circuit of lithium battery module; when the abnormal conditions such as overcharging; battery first suppresses to overcharge and repair battery; when battery suppresses to overcharge damage without effect or battery essence; to directly cut off charging and discharging lithium battery road; thereby avoided acutely heating up because of lithium battery electric core; and the serious accidents such as the blast causing, burning, to guarantee the safe operation of battery.
2, lithium battery module of the present utility model adopts the design application design of traditional lead acid batteries, the actual lithium battery electric core that packs into, and increased intelligent monitoring, employing be the principle that first suppresses rear triggering.When lithium battery module overcharges or excessively puts, first battery core monitoring in expansion of metal formula memory switch protector and electric heating control module are used the battery core that in battery pack, voltage is higher to drive ceramic heater work, heater switch assembly, the electric current of balancing battery group, directly suppresses to overcharge or cross the generation of putting; When ceramic heater continues to switch module heating, when temperature reaches set temperature value, the memorial alloy switch that directly sets out, open circuit, the safety of protection lithium battery, this point is also the mode that is different from the direct trigger protection of traditional lithium battery completely.
3, battery core monitoring of the present utility model can also overcharge inhibition by gathering the euqalizing current of lithium battery electric core or lithium battery module with electric heating control module; During charging, suppress electric current and produce, battery is carried out to equilibrium reparation, its euqalizing current scope is effective greatly, can reach 1-60A, exceeds much more than 100 times of effect promoting than the electric current of the passive balanced 30mA of tradition; Extreme abnormal charging meeting finally triggers memory switch and thoroughly protects, and certainly recovers backsight battery and repairs situation, until repaired, memory switch can recover to allow battery enter normal work.
4, lithium battery module of the present utility model separates space mounting by expansion of metal formula memory switch protector with the battery core of connecting, and suppresses the function of current at the expansion of metal formula memory switch protector in other space.The serviceability of lithium battery module is significantly improved, overcome the very complicated difficult problem of conventional batteries heat management.
5, the expansion of metal formula memory switch protector that the utility model adopts utilizes marmem as break protective switch; simplify the protection system of traditional lithium ion battery complexity; anti-interference, anti-high pressure ability that marmem has, the characteristic that passive conveyance capacity is strong; overcome that short, poor stability of the life-span that electronic semi-conductor's switch (as MOSFET) exists, antijamming capability are weak, a little less than high-voltage resistance capability; the defects such as resistance to conveyance capacity is poor; improve the reliability of protective switch of the short circuit, effectively solved the safety issue of lithium ion battery.
6, the utility model is processed lithium battery moduleization, makes the standard battery module of 12V, except can directly applying, also can carry out any connection in series-parallel application of certain limit, and without additional assembly battery management system.As the battery module of two 12V 40Ah can directly be connected into the battery pack of 24V 40Ah, also can in parallel become the battery pack of 12V 80Ah, it is very simple that its application becomes, and thoroughly overturned the complicated occupation mode of lithium battery group tradition.
7, the utility model has been abandoned traditional lithium battery applications pattern; battery protection is directly made in to each independently in battery module; utilize the weak resistance of metal structure; act directly on the lithium ionic cell module of stop voltage; energy is limited to the space of limited sealing; improve safety and reliability, any connection in series-parallel truly realizing under lithium ionic cell module is used comprehensively, and fail safe and use simplicity are integrated.
8, current driving force lithium battery is in needs connection in series-parallel is used, manage very complicated, often a set of dynamic lithium battery group system cost accounts for total cost more than 50%, adopts technology of the present utility model directly the existing cost reduction of power lithium-ion battery system to be surpassed to 40%.
9, existing lithium battery group is in process in groups, control contact very many, and lithium battery module of the present utility model is only controlled 8 controllable dot of single module in principle, independent in module respectively, reliability is very high like this, lithium battery module can be accomplished to use as conventional batteries, and the folding life-span of actual measurement memorial alloy reaches 120,000 times.By adding of the utility model lithium battery module, following lithium ion battery can be accomplished to use as conventional batteries, the economic benefits that simplification user's use brings are very huge, reduce a large amount of social cost, for power lithium-ion battery, at aspects such as automobile, UPS, electric power energy storage, field uses, bring the all-round popularization effect of practical significance.
Above-mentioned explanation is only the general introduction of technical solutions of the utility model, in order to better understand technological means of the present utility model, and can be implemented according to the content of specification, below with preferred embodiment of the present utility model and coordinate accompanying drawing to be described in detail as follows.Embodiment of the present utility model is provided in detail by following examples and accompanying drawing thereof.
Accompanying drawing explanation
Accompanying drawing described herein is used to provide further understanding of the present utility model, forms the application's a part, and schematic description and description of the present utility model is used for explaining the utility model, does not form improper restriction of the present utility model.In the accompanying drawings:
Fig. 1 is overall structure schematic diagram of the present utility model;
Fig. 2 is circuit theory schematic diagram of the present utility model;
Fig. 3 is the structural representation of memorial alloy switch under normal temperature;
Fig. 4 is the structural representation of memorial alloy switch under memory temperature.
Number in the figure explanation: 1, module shell; 2, lithium battery electric core; 3, insulating layer; 4, expansion of metal formula memory switch protector; 5, negative pole pole; 6, Positive Poles; 7, emergency manual recovery button; 41, switch module; 42, ceramic heater; 43, battery core monitoring and electric heating control module; 411, switch housing; 412, aluminium heat-conducting plate; 413, memorial alloy switch; 4131, movable contact end; 4132, stationary contact end; 431, battery core monitor signal receiving terminal; 432, heating signal output; 433, communication interface.
Embodiment
Below with reference to the accompanying drawings and in conjunction with the embodiments, describe the utility model in detail.
Shown in Figure 1, a kind of lithium battery module based on expansion of metal formula memory switch protector, the module shell 1 that comprises an employing fire proofing, described module shell 1 inside is divided into left chamber and right chamber, in described left chamber, be provided with the battery pack that the lithium battery electric core 2 by 4 12V is in series, between described battery pack and described left chamber, be filled with insulating layer 3, in described right chamber, be provided with an expansion of metal formula memory switch protector 4, be positioned on the described module shell 1 of described left chamber top and be provided with negative pole pole 5, be positioned on the described module shell 1 of right chamber top and be provided with Positive Poles 6, the negative pole of described battery pack is connected with described negative pole pole 5, the positive pole of described battery pack is connected with the input of described expansion of metal formula memory switch protector 4, the output of described expansion of metal formula memory switch protector 4 is connected with described Positive Poles 6, described expansion of metal formula memory switch protector 4 comprises 5 battery core monitor signal receiving terminals 431, 5 described battery core monitor signal receiving terminals 431 are connected in turn on the both positive and negative polarity of 4 described lithium battery electric cores 2, carry out Real-Time Monitoring, on described module shell 1, be provided with an emergency manual recovery button 7, described emergency manual recovery button 7 is connected with described expansion of metal formula memory switch protector 4, described in application just, negative pole pole 6, 5 directly connect load forms loop, described expansion of metal formula memory switch protector 4 is last barrier, under extreme conditions turn-offs battery and thoroughly protects.
Further, shown in Figure 2, described expansion of metal formula memory switch protector 4 is comprised of with electric heating control module 43 41,2 ceramic heaters 42 of switch module and battery core monitoring.
Described switch module 41 comprises a switch housing 411, and described switch housing 411 inside are provided with an aluminium heat-conducting plate 412 and a memorial alloy switch 413; Described memorial alloy switch 413 consists of movable contact end 4131 and stationary contact end 4132, described movable contact end 4131 is made by two gold plaques, described movable contact end 4131 is determined by the temperature in described switch housing 4101 with the switching of described stationary contact end 4132, and silver-plated at described movable contact end 4131 and described stationary contact end 4132 top layers respectively, realize arc extinguishing, guarantee effectively opening circuit in deformation process.Shown in Figure 3, under normal temperature, described movable contact end 4131 contacts with described stationary contact end 4132, shown in Figure 4, and while reaching memory temperature, two gold plaques of described movable contact end 4131 are due to its physical characteristic, and refresh memory shape is separated with described stationary contact end 4132.
Further, the standardized module that described lithium battery module is 12V, except can directly applying, also can carry out any connection in series-parallel application of certain limit, and without additional assembly battery management system, thoroughly abandon traditional sophisticated electronic BMS.As the battery module of two 12V 40Ah can directly be connected into the battery pack of 24V 40Ah, also can in parallel become the battery pack of 12V 80Ah, it is very simple that its application becomes, and thoroughly overturned the complicated occupation mode of lithium battery group tradition.
The fire end of 2 described ceramic heaters 42 and described aluminium heat-conducting plate 412 close contacts, in described battery core monitoring and electric heating control module 43, comprise 431,2 heating signal outputs 432 of 5 battery core monitor signal receiving terminals and 2 communication interfaces 433,2 described heating signal outputs 432 are electrically connected to 2 described ceramic heaters 42 respectively, and 5 described battery core monitor signal receiving terminals 431 are electrically connected to the both positive and negative polarity of described 4 lithium battery electric cores 2 successively; One end of described memorial alloy switch 413 is connected with described Positive Poles 6, and the other end is connected with the positive pole of described battery pack.
Further, described battery core monitoring can be photoelectrical coupler signaling interface, RS232 interface or 485 interfaces etc. with 2 communication interfaces 433 in electric heating control module 43, all can realize described lithium battery module and neutralize other module communication in connection in series-parallel, also can link and communicate by letter with charger, controller, even can communicate with intelligent load signal transmission simultaneously, show battery status, battery core state, for large-scale series-parallel intelligent monitoring, promotes accurate control ability.
2 described ceramic heaters, one of them is primary heater PTC, another is auxiliary heater NTC.Main its feature of ceramic heater PTC is for constantly raising when temperature, and its internal resistance increases.Coordinate and can keep a relative constant ampere level load with NTC.Its voltage that gathers whole pack module 12v left and right carries out work, and in the time of can effectively suppressing whole Battery pack charging in process, voltage raises because overcharging fast.When the tandem working of many pack modules, suppressing action can be by high-voltage module in waiting for, low-voltage module voltage is raised to and approaches with high-voltage module is that total voltage arrives.This is the random series-parallel basis of module, and the battery pack after modularization can be simplified a large amount of monitoring costs, and improves reliability and the fail safe of application.
Auxiliary ceramic heater is that NTC, its feature are for constantly raising when temperature, its internal resistance constantly reduces, this device is except providing supplemental heat for memorial alloy switch, in process, in fact gathering the highest battery core of voltage in 4 string modular batteries discharges, consistency (the level of current domestic battery core that can balance in work becomes battery pack mould, generally after battery is used 1 year due to the fine difference of self discharge can cause group in battery core consistency decline, hydraulic performance decline), keep battery status stable.
The utility model adopts the design application design of traditional lead acid batteries, the actual lithium battery electric core that packs into, and increased intelligent monitoring.The safety of lead-acid battery emphasis except deriving from material own be be full of soon electric in, its internal resistance meeting significantly increases, and has directly limited the generation of battery overcharge, realizes between module balanced gradually.And lithium battery module employing of the present utility model is the principle that first suppresses rear triggering, when lithium cell charging enters the link overcharging, the trigger current that battery core monitoring and thermoelectricity control module produce an ampere level impels ceramic heater work, for switch module sealing heating, directly suppress the generation overcharging, this is first element.Intensification gradually because of ceramic heater subsequently reaches design load, directly triggers memorial alloy switch protection, stops charging and the safety of protection lithium battery, and this point is also different from the mode of traditional direct trigger protection of lithium battery completely.
The foregoing is only preferred embodiment of the present utility model, be not limited to the utility model, for a person skilled in the art, the utility model can have various modifications and variations.All within spirit of the present utility model and principle, any modification of doing, be equal to replacement, improvement etc., within all should being included in protection range of the present utility model.

Claims (7)

1. the lithium battery module based on expansion of metal formula memory switch protector, it is characterized in that: comprise a module shell (1), described module shell (1) inside is divided into left chamber and right chamber, in described left chamber, be provided with the battery pack that the lithium battery electric core (2) by 4 12V is in series, between described battery pack and described left chamber, be filled with insulating layer (3), in described right chamber, be provided with an expansion of metal formula memory switch protector (4), be positioned on the described module shell (1) of described left chamber top and be provided with negative pole pole (5), be positioned on the described module shell (1) of right chamber top and be provided with Positive Poles (6), the negative pole of described battery pack is connected with described negative pole pole (5), the positive pole of described battery pack is connected with the input of described expansion of metal formula memory switch protector (4), the output of described expansion of metal formula memory switch protector (4) is connected with described Positive Poles (6), described expansion of metal formula memory switch protector (4) comprises 5 battery core monitor signal receiving terminals (431), described 5 battery core monitor signal receiving terminals (431) are connected in turn on the both positive and negative polarity of described 4 lithium battery electric cores (2), carry out Real-Time Monitoring, on described module shell (1), be provided with an emergency manual recovery button (7), described emergency manual recovery button (7) is connected with described expansion of metal formula memory switch protector (4).
2. the lithium battery module based on expansion of metal formula memory switch protector according to claim 1, is characterized in that: described expansion of metal formula memory switch protector (4) is comprised of with electric heating control module (43) switch module (41), 2 ceramic heaters (42) and battery core monitoring; Described switch module (41) comprises a switch housing (411), described switch housing (411) inside is provided with an aluminium heat-conducting plate (412) and a memorial alloy switch (413), described memorial alloy switch (413) consists of movable contact end (4131) and stationary contact end (4132), described movable contact end (4131) is made by two gold plaques, and described movable contact end (4131) is determined by the temperature in described switch housing (411) with the switching of described stationary contact end (4132); The fire end of described two ceramic heaters (42) and described aluminium heat-conducting plate (4102) close contact, in described battery core monitoring and electric heating control module (43), comprise 5 battery core monitor signal receiving terminals (431) and 2 heating signal outputs (432), described 2 heating signal outputs (432) are electrically connected to described two ceramic heaters (42) respectively, and described 5 battery core monitor signal receiving terminals (431) are electrically connected to the both positive and negative polarity of described 4 lithium battery electric cores (2) successively; One end of described memorial alloy switch (413) is connected with described Positive Poles (6), and the other end is connected with the positive pole of described battery pack.
3. the lithium battery module based on expansion of metal formula memory switch protector according to claim 1, is characterized in that: described module shell (1) adopts fire proofing.
4. the lithium battery module based on expansion of metal formula memory switch protector according to claim 2, is characterized in that: in described 2 ceramic heaters (42), one is primary heater, and another is auxiliary heater.
5. the lithium battery module based on expansion of metal formula memory switch protector according to claim 2; it is characterized in that: in described battery core monitoring and electric heating control module (43), comprise 2 communication interfaces (433), described communication interface (433) is any one in photoelectrical coupler signaling interface, RS232 interface or 485 interface photoelectrical coupler signaling interfaces.
6. the lithium battery module based on expansion of metal formula memory switch protector according to claim 2, is characterized in that: described movable contact end (4131) and described stationary contact end (4132) top layer are silver-plated.
7. according to the lithium battery module based on expansion of metal formula memory switch protector described in any one in claim 1-6; it is characterized in that: the standardized module that described lithium battery module is 12V, can realize the connection in series-parallel of a plurality of described lithium battery modules and use.
CN201420278305.4U 2014-05-28 2014-05-28 Metal expansion type memory switch protector based lithium battery module Withdrawn - After Issue CN203839453U (en)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103985834A (en) * 2014-05-28 2014-08-13 中投仙能科技(苏州)有限公司 Lithium battery module based on metal expansion memory switch protector
CN104734309A (en) * 2015-04-21 2015-06-24 中投仙能科技(苏州)有限公司 Temperature-control charging device for lithium batteries for rail transit

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103985834A (en) * 2014-05-28 2014-08-13 中投仙能科技(苏州)有限公司 Lithium battery module based on metal expansion memory switch protector
CN104734309A (en) * 2015-04-21 2015-06-24 中投仙能科技(苏州)有限公司 Temperature-control charging device for lithium batteries for rail transit

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