CN205017076U - Battery management system falls line inefficacy detection circuitry - Google Patents
Battery management system falls line inefficacy detection circuitry Download PDFInfo
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- CN205017076U CN205017076U CN201520821594.2U CN201520821594U CN205017076U CN 205017076 U CN205017076 U CN 205017076U CN 201520821594 U CN201520821594 U CN 201520821594U CN 205017076 U CN205017076 U CN 205017076U
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- Y—GENERAL 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
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
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Abstract
The utility model relates to a battery management system falls line inefficacy detection circuitry, including battery module, filter module, switch matrix, switching power supply, sampling module and control module, control module respectively with switching power supply switch matrix and the sampling module be connected, switching power supply with switch matrix be connected, the sampling module with switch matrix be connected, switch matrix with filter module and battery module be connected, filter module with battery module be connected. Adopt the battery management system falls line inefficacy detection circuitry of this kind of structure, whether the external pencil that both can detect out BMS voltage acquisition circuit and voltage balancing circuit has the line of falling, and whether the contact that can detect out the BMS connector again is good, and can also detect out BMS self voltage acquisition circuit and whether the voltage balancing circuit function lost efficacy in addition, and the range of application is comparatively extensive.
Description
Technical field
The utility model relates to Vehicle Engineering, particularly relates to battery management system, specifically refers to that a kind of battery management system goes offline failure detection circuit.
Background technology
Along with the fast development of modern social economy, the vehicle on road gets more and more, and which results in environmental pollution day by day serious, traditional energy faces the possibility of petering out, and this makes the development of new energy vehicle be rapidly developed.There is numerous critical system in new energy vehicle, wherein just comprise the electrokinetic cell system of vehicle, and battery management system (BATTERYMANAGEMENTSYSTEM, BMS) is exactly one of subsystem in electrokinetic cell system.
Battery management system is the communication tie of power battery pack and vehicle control device, the real-time status of power battery pack can be informed vehicle control device, ensure that the routine health of power battery pack uses, improve the service efficiency of power battery pack, extend its useful life.Under usual conditions, BMS possesses at least two kinds of functions, battery voltage acquisition function and battery voltage balanced function.Battery voltage acquisition function can the using state of monitoring battery group monomer voltage in real time, prevents cell from occurring super-charge super-discharge phenomenon, improves battery utilance; Battery voltage balanced function can make cell in battery pack keep good consistency, extends the useful life of cell.
Along with a large amount of uses of BMS, BMS in use occurs that external connection line bundle goes offline or the battery voltage acquisition function of BMS self and battery balanced disabler sometimes, now for some non-integration chip solution BMS, the failure detection circuit that just needs to go offline carries out detection to these situations and judges.
Utility model content
The purpose of this utility model is the shortcoming overcoming above-mentioned prior art, and providing one can according to self-demand, and the battery management system that whether operating state of monitoring BMS exists the failure state that goes offline in real time goes offline failure detection circuit.
To achieve these goals, the battery management system of the present utility model failure detection circuit that goes offline has following formation:
This battery management system goes offline failure detection circuit, its main feature is, described circuit comprises battery module, filtration module, switch arrays, Switching Power Supply, sampling module and control module, described control module respectively with described Switching Power Supply, described switch arrays and described sampling module are connected, described Switching Power Supply is connected with described switch arrays, described sampling module is connected with described switch arrays, described switch arrays are connected with described filtration module and described battery module, described filtration module is connected with described battery module.
Further, described Switching Power Supply is DC-DC Switching Power Supply.
Further, described battery module is lithium battery group.
The battery management system that have employed in this utility model goes offline failure detection circuit, both can detect whether the external wire harness of BMS voltage collection circuit and voltage balance circuit goes offline, can detect that again whether the contact of BMS connector is good, can also detect whether BMS its voltage Acquisition Circuit and voltage balance circuit function lost efficacy in addition.
Accompanying drawing explanation
Fig. 1 is that battery management system of the present utility model goes offline the structural representation of failure detection circuit.
Fig. 2 is that battery management system in an embodiment of the present utility model goes offline the application schematic diagram of failure detection circuit.
Embodiment
In order to more clearly describe technology contents of the present utility model, conduct further description below in conjunction with specific embodiment.
Refer to shown in Fig. 1, the battery management system of the present utility model failure detection circuit that goes offline mainly comprises DC-DC Switching Power Supply, filter circuit, switch arrays, sample circuit and MCU.Simultaneously these circuit also constitute battery equalizing circuit and battery Acquisition Circuit, and cooperatively interacting between the two jointly completes BMS and to go offline function of failure detection.
The failure detection circuit that goes offline of the present utility model, in line with the principle effectively utilizing available circuit, by certain control strategy, makes existing battery equalizing circuit and battery Acquisition Circuit in BMS jointly can form the failure detection circuit that effectively goes offline.
Wherein battery equalizing circuit is jointly made up of DC-DC Switching Power Supply, switch arrays and MCU, and this equalizing circuit can save cell to each and mend electricity separately, makes the consistency that the cell of power battery pack keeps good in real time.MCU passes through the unlatching of control switch array and DC-DC Switching Power Supply, can complete the equalizing charge for battery pack batteries, carry out equalizing charge for a long time can at ordinary times battery pack.
Battery Acquisition Circuit is jointly made up of switch arrays, filter circuit, sample circuit and MCU, this Acquisition Circuit constantly can carry out independent image data to each joint cell, can carry out the voltage sample of cell at ordinary times for a long time to battery pack, but battery Acquisition Circuit and battery equalizing circuit cannot carry out simultaneously.
The process of function of failure detection work of going offline first opens battery equalizing circuit function, separately to the of short duration equalizing charge of certain batteries, then by battery Acquisition Circuit, voltage data collection sampling is carried out to the battery of correspondence, collection result feeds back to MCU and judges, according to certain judgment criterion, can show whether the outside of BMS and the rat tail of power battery pack go offline and exist by judged result, or can judge whether a certain road function of battery equalizing circuit in BMS and battery Acquisition Circuit lost efficacy.
Gather the judgement of cell data through MCU, judgment criterion is as follows:
If 1 image data is greater than a certain set point Va, can judge that external wire harness goes offline or equalization function circuit malfunction;
If 2 image data are greater than a certain set point Vb (Va>Vb), can judge that voltage acquisition functional circuit lost efficacy;
If 3 image data and battery cell voltage Vc (Vb>Vc) basically identical, can judge that BMS can normally work;
If 4 image data are lower than a certain set point Vd (Vc>Vd), can judge that voltage acquisition functional circuit lost efficacy;
If 5 go offline measuring ability when starting image data do not change, equalization function circuit malfunction can be judged.
According to above judgment criterion, the whole deterministic process of a kind of disabler of special citing.
Vehicle is after normal startup, BMS periodically will open the function of failure detection that goes offline, the highest and the minimum cell data of each detection all will compare with every Battery pack mean value, during cell data value a certain below or above battery pack mean value, the MCU of BMS will make corresponding judgement according to the BMS control strategy of setting.
Such as, data display in Fig. 2, the detected value of Section 10 battery data is lower than battery pack more than mean value 20mV, by the MCU of BMS, Section 10 battery data that this is on the low side is judged that the voltage acquisition functional circuit that batteries is corresponding for this reason goes wrong, i.e. battery voltage acquisition disabler, this result is fed back to entire car controller by CAN communication, makes vehicle make corresponding function adjustment.
The battery management system that have employed in this utility model goes offline failure detection circuit, both can detect whether the external wire harness of BMS voltage collection circuit and voltage balance circuit goes offline, can detect that again whether the contact of BMS connector is good, can also detect whether BMS its voltage Acquisition Circuit and voltage balance circuit function lost efficacy in addition.
Battery management system of the present utility model goes offline in the technical scheme of failure detection circuit, each wherein included functional module and modular unit all can correspond to the particular hardware circuit in integrated circuit structure, therefore the improvement of particular hardware circuit is only related to, hardware components not only belongs to the carrier performing control software design or computer program, therefore solve corresponding technical problem and obtain the application that corresponding technique effect do not relate to any control software design or computer program yet, that is, the utility model only utilizes the improvement of the hardware circuit aspect involved by these modules and unit namely can solve technical problem to be solved, and obtain corresponding technique effect, and do not need auxiliary namely can realize corresponding function with specific control software design or computer program.
Above-described embodiment is this patent preferred embodiment; not be used for limiting practical range of the present utility model; those skilled in the art is under the prerequisite not departing from the utility model principle; the improvement done, change, combination, substitute etc., all belong within the utility model claim scope required for protection.
In this description, the utility model is described with reference to its specific embodiment.But, still can make various amendment and conversion obviously and not deviate from spirit and scope of the present utility model.Therefore, specification and accompanying drawing are regarded in an illustrative, rather than a restrictive.
Claims (3)
1. a battery management system goes offline failure detection circuit, it is characterized in that, described circuit comprises battery module, filtration module, switch arrays, Switching Power Supply, sampling module and control module, described control module respectively with described Switching Power Supply, described switch arrays and described sampling module are connected, described Switching Power Supply is connected with described switch arrays, described sampling module is connected with described switch arrays, described switch arrays are connected with described filtration module and described battery module, described filtration module is connected with described battery module.
2. battery management system according to claim 1 goes offline failure detection circuit, and it is characterized in that, described Switching Power Supply is DC-DC Switching Power Supply.
3. battery management system according to claim 1 goes offline failure detection circuit, and it is characterized in that, described battery module is lithium battery group.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520821594.2U CN205017076U (en) | 2015-10-22 | 2015-10-22 | Battery management system falls line inefficacy detection circuitry |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520821594.2U CN205017076U (en) | 2015-10-22 | 2015-10-22 | Battery management system falls line inefficacy detection circuitry |
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| CN205017076U true CN205017076U (en) | 2016-02-03 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111273176A (en) * | 2018-12-05 | 2020-06-12 | 宁德时代新能源科技股份有限公司 | Fault diagnosis optimization method, device, system and storage medium |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111273176A (en) * | 2018-12-05 | 2020-06-12 | 宁德时代新能源科技股份有限公司 | Fault diagnosis optimization method, device, system and storage medium |
| CN111273176B (en) * | 2018-12-05 | 2022-03-25 | 宁德时代新能源科技股份有限公司 | Fault diagnosis optimization method, device, system and storage medium |
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