CN205724851U - A kind of power battery of electric vehicle secondary protection system - Google Patents

A kind of power battery of electric vehicle secondary protection system Download PDF

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Publication number
CN205724851U
CN205724851U CN201620329134.2U CN201620329134U CN205724851U CN 205724851 U CN205724851 U CN 205724851U CN 201620329134 U CN201620329134 U CN 201620329134U CN 205724851 U CN205724851 U CN 205724851U
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China
Prior art keywords
management system
power
battery management
control module
power battery
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CN201620329134.2U
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Chinese (zh)
Inventor
任焕
李振文
王艳
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Shenzhen Smart Li-Ion Energy Technology Co Ltd
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Shenzhen Smart Li-Ion Energy Technology Co Ltd
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Abstract

The utility model discloses a kind of power battery of electric vehicle secondary protection system, including battery management system, power control module, current sample module and secondary protector, power battery pack is sampled by battery management system, power control module is for occurring overcharging in power battery pack, output is stopped when over-discharge or supercurrent output, current sample module is for sampling to the electric current of bus, secondary protector is connected with described battery management system, for starting second time defencive function when described power control module is in failure state, the described secondary protector also other end with described power battery pack is connected, described secondary protector is also connected with the forward outfan of bus.Implement power battery of electric vehicle secondary protection system of the present utility model, have the advantages that the level of security that can solve the security risk after power control module lost efficacy, electric motor car can be improved.

Description

A kind of power battery of electric vehicle secondary protection system
Technical field
This utility model relates to electric automobiles, particularly to a kind of power battery of electric vehicle secondary protection system.
Background technology
Electrokinetic cell is the power supply in powered tools source, refers to as electric automobile, electric train, electricity more Dynamic bicycle, golf cart provide the accumulator of power.Its main distinction is in for car engine start Starting battery.Many employing sealing valve port formula lead-acid accumulators, opened type tube type lead-acid accumulator and phosphoric acid Ferrum lithium storage battery.When to the monitoring state of power battery of electric vehicle, general use cell tube system (BMS) to its monitoring state, generally, the power control module of battery management system is controlled The output of electrokinetic cell, if the short-circuit situation that lost efficacy occurs in power control module.Whole power current Pond group will appear from situation the most out of control, thus causes potential safety hazard.And can't well solve merit at present Security risk after the inefficacy of rate control module, the level of security of electric motor car is relatively low.
Utility model content
The technical problems to be solved in the utility model is, above-mentioned for prior art not can solve The defect that security risk after power control module inefficacy, the level of security of electric motor car are relatively low, it is provided that Yi Zhongneng Well solve the security risk after power control module lost efficacy, level of security electronic of electric motor car can be improved Car electrokinetic cell secondary protection system.
This utility model solves its technical problem and be the technical scheme is that structure a kind of electrical vehicular power electricity Pond secondary protection system, protects including battery management system, power control module, current sample module and secondary Protection unit, described battery management system is connected with power battery pack, samples described power battery pack, Described power control module is connected with described battery management system, for occurring excessively in described power battery pack Output, described current sample module and described battery management is stopped when charging, over-discharge or supercurrent output System connects, for the electric current of bus is sampled, described current sample module also by bus with described One end of power battery pack connects, and described current sample module is also by bus with described power control module even Connecing, described power control module is also connected with the negative sense outfan of bus, and described secondary protector is with described Battery management system connects, for starting second time protection when described power control module is in failure state Function, the described secondary protector also other end with described power battery pack is connected, and described second protection fills Put and be also connected with the forward outfan of bus.
In power battery of electric vehicle secondary protection system described in the utility model, described secondary protector is Chopper.
In power battery of electric vehicle secondary protection system described in the utility model, described battery management system sets Having power model to control foot position, described power control module controls foot position and described electricity by described power model Pond management system connects.
In power battery of electric vehicle secondary protection system described in the utility model, described battery management system sets Having second time protection to control foot position, described secondary protector controls foot position with described by described second protection Battery management system connects.
In power battery of electric vehicle secondary protection system described in the utility model, described chopper uses artificial Can reforestation practices.
In power battery of electric vehicle secondary protection system described in the utility model, described power battery pack bag Including the electrokinetic cell of multiple series connection, the two ends of each described electrokinetic cell are the most all with described battery management system the most even Connect.
Implement power battery of electric vehicle secondary protection system of the present utility model, have the advantages that by In being provided with secondary protector, when failure state occurs in power control module, battery management system is permissible Control secondary protector and cut off major loop, thus eliminating the need the potential safety hazard after power control module lost efficacy, So it can solve the security risk after power control module lost efficacy, can improve the safe level of electric motor car Not.
Accompanying drawing explanation
In order to be illustrated more clearly that this utility model embodiment or technical scheme of the prior art, below by right In embodiment or description of the prior art, the required accompanying drawing used is briefly described, it should be apparent that below, Accompanying drawing in description is only embodiments more of the present utility model, for those of ordinary skill in the art, On the premise of not paying creative work, it is also possible to obtain other accompanying drawing according to these accompanying drawings.
Fig. 1 is the structural representation in one embodiment of this utility model power battery of electric vehicle secondary protection system Figure.
Detailed description of the invention
Below in conjunction with the accompanying drawing in this utility model embodiment, to the technical side in this utility model embodiment Case is clearly and completely described, it is clear that described embodiment is only that this utility model part is real Execute example rather than whole embodiments.Based on the embodiment in this utility model, ordinary skill people The every other embodiment that member is obtained under not making creative work premise, broadly falls into this utility model The scope of protection.
In this utility model power battery of electric vehicle secondary protection system embodiment, its power battery of electric vehicle The structural representation of secondary protection system is as shown in Figure 1.In Fig. 1, this power battery of electric vehicle second protection System includes battery management system BMS, power control module, current sample module and secondary protector, Battery management system BMS is connected with power battery pack, is used for sampling power battery pack, the most right The state of power battery pack is sampled, such as: overcharge power battery pack, over-discharge or electricity Stream output situation is sampled, and in the present embodiment, power battery pack includes the electrokinetic cell of multiple series connection, often The two ends of individual electrokinetic cell are the most all connected with battery management system.Power control module and battery management system BMS connects, for occurring overcharging in power battery pack, over-discharge or stop during supercurrent output defeated Go out, say, that battery management system BMS obtains the data of power battery pack by sampling, works as power current Overcharging occurs in pond group, over-discharge or during supercurrent output situation, battery management system BMS can control Power control module outputs it stopping, thus protects the safety of power battery pack.
In the present embodiment, current sample module is connected with battery management system BMS, for the electric current to bus Sampling, current sample module is connected with one end of power battery pack also by bus, current sample module Be connected with power control module also by bus, power control module also with the negative sense outfan of bus-be connected, Secondary protector is connected with battery management system BMS, for when power control module is in failure state Starting second time defencive function, secondary protector is also connected with the other end of power battery pack, second protection Device also with the forward outfan of bus+be connected.It is noted that in the present embodiment, secondary protector For chopper.Certainly, under the certain situation of the present embodiment, secondary protector can also be chopper it The outer protection device playing cutting-off controlling effect, the selection of secondary protector is more flexible.
In the present embodiment, battery management system BMS is provided with power model and controls foot position, and power control module leads to Overpower module controls foot position and is connected with battery management system BMS.Battery management system BMS is additionally provided with Second protection controls foot position, and secondary protector controls foot position and battery management system BMS by second protection Connect.
In the present embodiment, if battery management system BMS monitors any electrokinetic cell in power battery pack and goes out Show and overcharged or over-discharge, and battery management system BMS has had been sent from switch-off power control module The instruction of output, but battery management system BMS can also detect the feelings still having electric current to export on whole bus (battery management system BMS by carrying out current sample to C point, and carries out judging system), cell tube under condition Reason system BMS will judge power control module already at failure conditions, at this moment battery management system BMS Chopper (B point) will be started and cut off whole loop.Thus reach to protect the safety of whole power battery pack Purpose.
Equally, if battery management system BMS monitors the feelings arbitrarily needing to carry out switch-off power control module During condition, battery management system BMS can also monitor in the case of also having electric current (on bus) on major loop, Battery management system BMS can think that power control module is in runaway condition.So, battery management system BMS can start secondary protector and carry out protecting for the second time.Prevent because any exception causes damaging power The situation of set of cells occurs.Use power battery of electric vehicle secondary protection system of the present utility model, can be very Good solves the security risk after power control module lost efficacy, thus improves the level of security of whole electric motor car, It can solve above-mentioned security hidden trouble.
It is noted that in the present embodiment, when, after circuit breaker trip major loop, needing to solve power and control After the hidden danger of Module Fail, by recovering manually, namely chopper use manually can reforestation practices, extensive The normal work of power battery pack is ensured that after Fu.
In a word, in the present embodiment, above-mentioned power battery of electric vehicle secondary protection system can well solve Security risk after power control module inefficacy, thus improve the level of security of whole electric motor car, which solve Second protection under the power control module failure conditions of electric motor car, thoroughly avoids above-mentioned security hidden trouble Generation.
The foregoing is only preferred embodiment of the present utility model, not in order to limit this utility model, All within spirit of the present utility model and principle, any modification, equivalent substitution and improvement etc. made, all Within protection domain of the present utility model should be included in.

Claims (6)

1. a power battery of electric vehicle secondary protection system, it is characterised in that include battery management system, Power control module, current sample module and secondary protector, described battery management system and electrokinetic cell Group connects, samples described power battery pack, described power control module and described battery management system Connect, for occurring overcharging in described power battery pack, over-discharge or stop during supercurrent output defeated Going out, described current sample module is connected with described battery management system, is used for sampling the electric current of bus, Described current sample module is connected also by one end of bus with described power battery pack, described current sample mould Block is connected with described power control module also by bus, and described power control module is also defeated with the negative sense of bus Going out end to connect, described secondary protector is connected with described battery management system, for controlling when described power Start second time defencive function when module is in failure state, described secondary protector also with described power current The other end of pond group connects, and described secondary protector is also connected with the forward outfan of bus.
Power battery of electric vehicle secondary protection system the most according to claim 1, it is characterised in that institute Stating secondary protector is chopper.
Power battery of electric vehicle secondary protection system the most according to claim 1 and 2, it is characterised in that Described battery management system is provided with power model and controls foot position, and described power control module passes through described power mould Block controls foot position and is connected with described battery management system.
Power battery of electric vehicle secondary protection system the most according to claim 1 and 2, it is characterised in that Described battery management system is provided with second time protection and controls foot position, and described secondary protector passes through described secondary Protection controls foot position and is connected with described battery management system.
Power battery of electric vehicle secondary protection system the most according to claim 2, it is characterised in that institute Stating chopper employing manually can reforestation practices.
Power battery of electric vehicle secondary protection system the most according to claim 1, it is characterised in that institute Stating power battery pack and include the electrokinetic cell of multiple series connection, the two ends of each described electrokinetic cell are the most all with described Battery management system connects.
CN201620329134.2U 2016-04-18 2016-04-18 A kind of power battery of electric vehicle secondary protection system Active CN205724851U (en)

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CN201620329134.2U CN205724851U (en) 2016-04-18 2016-04-18 A kind of power battery of electric vehicle secondary protection system

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Application Number Priority Date Filing Date Title
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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105790224A (en) * 2016-04-18 2016-07-20 深圳市智锂能源科技有限公司 Electric vehicle power battery secondary protection system and method
CN110391644A (en) * 2018-04-19 2019-10-29 凹凸电子(武汉)有限公司 Battery protection system, battery pack and guard method

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105790224A (en) * 2016-04-18 2016-07-20 深圳市智锂能源科技有限公司 Electric vehicle power battery secondary protection system and method
CN110391644A (en) * 2018-04-19 2019-10-29 凹凸电子(武汉)有限公司 Battery protection system, battery pack and guard method
US10978867B2 (en) 2018-04-19 2021-04-13 02Micro Inc. Battery protection systems
CN110391644B (en) * 2018-04-19 2022-04-26 凹凸电子(武汉)有限公司 Battery protection system, battery pack and protection method

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