CN203481801U - Battery charging and discharging protection circuit - Google Patents
Battery charging and discharging protection circuit Download PDFInfo
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- CN203481801U CN203481801U CN201320592762.6U CN201320592762U CN203481801U CN 203481801 U CN203481801 U CN 203481801U CN 201320592762 U CN201320592762 U CN 201320592762U CN 203481801 U CN203481801 U CN 203481801U
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Abstract
The utility model discloses a battery charging and discharging protection circuit, which comprises an overcharging protection circuit, an over discharging protection circuit and an auxiliary overcharging protection circuit, wherein the input end of the overcharging protection circuit is connected between the positive electrode and the negative electrode of a battery, and the output end is connected with the output end of a charging circuit; the input end of the over discharging protection circuit is also connected between the positive electrode and the negative electrode of the battery, and the output end is connected with the input end of a load circuit; and the input end of the auxiliary overcharging protection circuit is connected between the positive electrode and the negative electrode of the battery, and the output end is connected with the output end of the charging circuit. In the prior art, if breakdown and failure happen to the overcharging protection circuit due to reasons such as an external impact, the fact that charging the battery is carried out continuously by the charging circuit may results in a short-circuited battery, and explosion happens in the severe case. According to the battery charging and discharging protection circuit, in the case when overcharging happens to the battery and the overcharging protection circuit fails, the battery charging circuit is cut off through action of the auxiliary overcharging protection circuit, the battery can be prevented from being short-circuited due to overcharging, and the battery can be prevented from explosion.
Description
Technical field
The utility model relates to protective circuit, particularly a kind of battery charge/discharge protection circuit.
Background technology
In the use procedure of lithium battery, if lithium battery is overcharged and can cause lithium battery short circuit and electrolyte to reveal the problems such as burning, in the situation that seriously overcharging, lithium battery also may there is the danger of blast.If lithium battery over-discharge can make battery polarization, damage battery.So be typically provided with charge-discharge protection circuit in the use procedure of lithium battery, the charge or discharge that make lithium battery have just stopped charge or discharge to the threshold voltage of a setting later, thus protection lithium battery.Because over-charge of lithium battery can cause the short circuit of battery, when serious, also have the danger of blast, compare lithium battery and cross that to put danger larger.If the overcharge protection circuit of battery is because of the reasons such as foreign impacts causes puncturing inefficacy, and charging circuit continues lithium cell charging, likely can cause lithium battery short circuit, causes the leakage of electrolyte, and likely brings the danger of blast.
Summary of the invention
Problem to be solved in the utility model is to provide a kind of battery charge/discharge protection circuit; there is auxiliary overcharge protection circuit; in the situation that overcharge protection circuit loses efficacy, cut off charging circuit, and prevented over-charging of battery and cause battery short circuit, avoided the danger of battery explosion.
In order to solve the problems of the technologies described above, the utility model adopts following technical scheme: a kind of battery charge/discharge protection circuit, comprise overcharge protection circuit and over-discharge protection circuit, the input of described overcharge protection circuit is connected between the positive pole and negative pole of a battery, the output of overcharge protection circuit has connected the output of a charging circuit, the input of described over-discharge protection circuit is also connected between the positive pole and negative pole of described battery, the output of described over-discharge protection circuit connects the input of a load circuit, also comprise an auxiliary overcharge protection circuit, the input of described auxiliary overcharge protection circuit connects between the positive pole and negative pole of described battery, the output of auxiliary overcharge protection circuit also connects described charging circuit output.Described overcharge protection circuit is provided with the first overcharged voltage threshold values; in auxiliary overcharge protection circuit, be provided with the second overcharged voltage threshold values, the second overcharged voltage threshold values of described auxiliary overcharge protection circuit should be a little more than the first overcharged voltage threshold values of overcharged voltage protective circuit.If the second overcharged voltage threshold values exceeds, the first overcharged voltage threshold values is too many, and battery seriously overcharges, and diminishes battery life, and has the danger of battery short circuit.In the technical program, arrange the second overcharged voltage threshold values higher than the first overcharged voltage threshold values within the scope of 100 millivolts-200 millivolts.In the situation that overcharge protection circuit lost efficacy, the charging circuit of battery is cut off in described auxiliary overcharge protection circuit effect, prevents over-charging of battery.Concrete course of action is as follows: charging circuit to battery charging process in, if overcharge protection circuit detects the first overcharged voltage threshold values that the magnitude of voltage of battery is set higher than overcharge protection circuit, sending controling instruction cuts off the charging circuit of battery, avoid over-charging of battery, if auxiliary overcharge protection circuit detects the second overcharged voltage threshold values that cell voltage is set higher than auxiliary overcharge protection circuit, illustrate that overcharge protection circuit lost efficacy, described auxiliary overcharge protection circuit sending controling instruction cuts off the charging circuit of battery, prevent that battery from causing short circuit because overcharging, avoid dangerous generation.
As preferably; described auxiliary overcharge protection circuit comprises auxiliary overcharge testing circuit and control switch; the described auxiliary input that overcharges testing circuit connects between anode and negative pole; output is electrically connected to control switch, and described control switch is connected between battery cathode and charging circuit output.The second described overcharged voltage threshold values is arranged at auxiliary overcharging in testing circuit; in the situation that overcharge protection circuit lost efficacy; auxiliary overcharge voltage that testing circuit detects battery higher than the second overcharged voltage threshold values; send control command to auxiliary control switch, the charging circuit of battery is cut off in described auxiliary control switch action.
As preferably, described control switch is comprised of a controllable silicon and two fuses, described two fuses are composed in series fuse group, the two ends of described fuse group are connected between battery cathode and charging circuit output, described silicon controlled control end is connected in the auxiliary output that overcharges testing circuit, the positive pole of silicon controlled anodic bonding battery, silicon controlled negative electrode is connected to the tie point of two fuses.When auxiliary when overcharging testing circuit and cell voltage being detected and reach the second overcharged voltage threshold values, send high level to silicon controlled control end, controlled silicon conducting, two described fuses fuse because of the fusing value of On current higher than fuse, cut off the charging circuit of battery, avoided over-charging of battery.Controllable silicon has advantages of that control rate is fast, can receive auxiliary overcharge testing circuit output high level signal after conducting immediately, prevent over-charging of battery.
As preferably; described overcharge protection circuit comprises and overcharges testing circuit and controlled switch; the control end of described controlled switch overcharges testing circuit output described in being electrically connected to; and described controlled switch is connected between described battery cathode and charging circuit output, described in overcharge between the positive pole and negative pole that testing circuit input is connected in battery.The first overcharged voltage threshold values of described overcharge protection circuit is arranged at and overcharges in testing circuit, in battery charging process, by overcharging testing circuit, detect battery current voltage value, if battery voltage value exceeds the first overcharged voltage threshold values, sending controling instruction disconnects controlled switch, if now auxiliary, overcharge the voltage that testing circuit detects battery and illustrate that higher than the second overcharged voltage threshold values overcharge protection circuit lost efficacy because the reasons such as foreign impacts cause puncturing, the auxiliary testing circuit sending controling instruction that overcharges is to auxiliary control switch, by auxiliary control switch, cut off the charging circuit of battery, prevent over-charging of battery.
As preferably, described controlled switch comprises a N-type field effect transistor I, described in the grid of described N-type field effect transistor I is electrically connected on, overcharges testing circuit output, and drain electrode connects battery cathode, and source electrode is connected to charging circuit output.When overcharging testing circuit and cell voltage detected and reach the first overcharged voltage threshold values, transmission is the grid to N-type field effect transistor I lower than the low level of N-type field effect transistor I cut-in voltage, N-type field effect transistor I disconnects, and has cut off the charging circuit of battery, prevents over-charging of battery.N-type field effect transistor quick action, working stability, is applicable to the control to the circuit that for example this class change in voltage amplitude of over-charging of battery is less.
As further optimization, described controlled switch comprises relay one, describedly overcharge the base stage that testing circuit output connects a NPN triode I, the grounded emitter of described NPN triode I, the coil of collector connection relay one, the coil of described relay one is also connected to the positive pole of battery, and the normally-closed contact of described relay one is connected between battery cathode and charging circuit output.Described overcharging is provided with the first overcharged voltage threshold values in testing circuit, when overcharging testing circuit and cell voltage detected and reach the first overcharged voltage threshold values, send high level to NPN triode I, ground connection after NPN triode I conducting, the coil losing electricity of relay one, normally closed interlock disconnects, and has cut off the charging circuit of battery.
As preferably, described over-discharge protection circuit comprised puts testing circuit and described controlled switch, and described mistake is put testing circuit output and is electrically connected to described controlled switch, and crosses and put testing circuit input and be connected to anode and negative pole.Described mistake is put and in testing circuit, is provided with overdischarge pressure valve value, served as and put testing circuit and voltage detected in battery discharge procedure lower than overdischarge pressure valve value, cross and put testing circuit sending controling instruction disconnection controlled switch, cut off the load circuit of battery, prevent from that battery from crossing to put and affect useful life of battery.
As preferably, described controlled switch comprises a N-type field effect transistor II, and the grid of described N-type field effect transistor II is electrically connected on described mistake and puts testing circuit output, and source electrode connects battery cathode, and drain electrode is connected to load circuit output.Described mistake is put and in testing circuit, is provided with overdischarge pressure valve value, served as when putting testing circuit and cell voltage being detected and reach overdischarge pressure valve value, send low level to the grid of N-type field effect transistor II, N-type field effect transistor II disconnects, cut off the load circuit of battery, preventing that battery from crossing puts, and avoids causing the polarization of battery.
As preferably, described controlled switch comprises relay two, described mistake is put the base stage that testing circuit output connects a NPN triode II, the grounded emitter of described NPN triode II, the coil of collector connection relay two, the coil of described relay two is also connected to the positive pole of battery, and the normally-closed contact of described relay two is connected between battery cathode and load circuit input.Described mistake is put and in testing circuit, is provided with overdischarge pressure valve value, served as when putting testing circuit and cell voltage being detected and reach overdischarge pressure valve value, send high level to NPN triode II, ground connection after NPN triode II conducting, the coil losing electricity of relay two, normally closed interlock disconnects, and has cut off the load circuit of battery.
Adopt after technique scheme, the utlity model has following advantage:
In to battery charging process, when if overcharge protection circuit lost efficacy, overcharging appears in battery, auxiliary overcharge protection circuit can act on the charging circuit that cuts off battery in time, prevents over-charging of battery.The second overcharged voltage threshold values is larger than the first overcharged voltage threshold values, the charging circuit that battery is cut off in over-charging of battery action can be detected in time in the situation that overcharge protection circuit lost efficacy, and prevents that over-charging of battery from seriously causing danger.
Accompanying drawing explanation
Below in conjunction with accompanying drawing, embodiment of the present utility model is described further:
Fig. 1 is the utility model circuit connection schematic diagram;
Fig. 2 is the auxiliary chip used pin schematic diagram of testing circuit that overcharges;
Fig. 3 is embodiment 1 elementary diagram;
Fig. 4 is embodiment 2 elementary diagrams.
Embodiment
As shown in Figure 1; a kind of battery charge/discharge protection circuit; comprise overcharge protection circuit and over-discharge protection circuit; the input of described overcharge protection circuit is connected between the positive pole and negative pole of a battery; the output of overcharge protection circuit has connected the output of a charging circuit; the input of described over-discharge protection circuit is also connected between the positive pole and negative pole of described battery, and output connects the input of a load circuit.Between described charging circuit and battery, be also connected with an auxiliary overcharge protection circuit, the input of described auxiliary overcharge protection circuit connects between the positive pole and negative pole of described battery, and output also connects described charging circuit output.Described overcharge protection circuit is provided with the first overcharged voltage threshold values; in auxiliary overcharge protection circuit, be provided with the second overcharged voltage threshold values, the second overcharged voltage threshold values of described auxiliary overcharge protection circuit should be a little more than the first overcharged voltage threshold values of overcharged voltage protective circuit.In this preferred implementation, arrange the second overcharged voltage threshold values higher than the first overcharged voltage threshold values within the scope of 100 millivolts-200 millivolts.If the second overcharged voltage threshold values exceeds, the first overcharged voltage threshold values is too many, and battery seriously overcharges, and diminishes battery life, and has the danger of battery short circuit.
General charging and discharging lithium battery scope is between 2.5 volts-4.2 volts, in the situation that surpassing 4.2 volts or electric discharge lower than 2.5 volts, easily causes lithium cell charging the polarization of battery, shorten the life-span of battery, and over-charge of lithium battery can cause battery short circuit and electrolyte to reveal the problems such as burning, even also has the danger of blast.In the present embodiment, the first threshold voltage of overcharge protection circuit is arranged on 4.2 volts, and the second voltage threshold values of described auxiliary overcharge protection circuit is higher than within the scope of 100 millivolts-200 millivolts of the first threshold voltages, can be arranged on 4.3 volts.The threshold voltage of described over-discharge protection circuit is arranged on 2.5 volts.
Charging circuit to power source charges process in; if the magnitude of voltage that overcharge protection circuit detects battery is during higher than 4.2 volts of the first overcharged voltage threshold values; sending controling instruction cuts off the charging circuit of battery; avoid over-charging of battery; when if auxiliary overcharge protection circuit detects cell voltage higher than 4.3 volts of the second overcharged voltage threshold values; illustrate that overcharge protection circuit lost efficacy; described auxiliary overcharge protection circuit sending controling instruction cuts off the charging circuit of battery; prevent that battery from causing short circuit because overcharging, and avoids dangerous generation.In discharge process; if the magnitude of voltage that over-discharge protection circuit detects battery is during lower than 2.5 volts of the threshold voltages of over-discharge protection circuit, sending controling instruction cuts off the load circuit of battery, avoids battery to continue electric discharge; cause battery polarization, affect the useful life of battery.
A kind of optimal technical scheme as the present embodiment; described overcharge protection circuit comprises and overcharges testing circuit and controlled switch; the control end of described controlled switch overcharges testing circuit output described in being electrically connected to; and described controlled switch is connected between described battery cathode and charging circuit output, described in overcharge between the positive pole and negative pole that testing circuit input is connected in battery.Described over-discharge protection circuit comprised puts testing circuit and described controlled switch, and described mistake is put testing circuit output and is electrically connected to described controlled switch, and crosses and put testing circuit input and be connected between anode and negative pole.Described auxiliary overcharge protection circuit comprises auxiliary overcharge testing circuit and control switch; the described auxiliary input that overcharges testing circuit connects between anode and negative pole; output is electrically connected to control switch, and described control switch is connected between battery cathode and charging circuit output.The first described overcharged voltage threshold values is arranged at and overcharges in testing circuit, and the second described overcharged voltage threshold values is arranged at auxiliary overcharging in testing circuit, and the threshold voltage of described over-discharge protection circuit was arranged on to be put in testing circuit.In this preferred embodiment, the described auxiliary testing circuit that overcharges adopts the chip that Japanese Mei Shangmei company model is MM3563B07RRE.As shown in Figure 2, the first pin VDD of chip connects power supply, the 5th pin VSS ground connection, and the 4th pin V1 connects described anode, and the 6th pin OV is electrically connected on controlled switch, and remaining second pin V3 and three-prong V2 are all unsettled.
Charging circuit to battery charging process in; overcharge testing circuit and detect battery voltage value; when magnitude of voltage being detected and be greater than 4.2 volts of the first overcharged voltage threshold values; sending controling instruction is to controlled switch; controlled switch cuts off charging circuit; if now the auxiliary testing circuit that overcharges detects cell voltage and reaches 4.3 volts, illustrate that overcharge protection circuit fault does not work, and the reason of fault likely because causing circuit devcie to puncture, the reasons such as foreign impacts causes.In the situation that overcharge protection circuit lost efficacy, the 6th pin OV output high level of MM3563B07RRE chip, to the control end of control switch, is controlled and is cut off charging circuit by control switch, prevents over-charging of battery.
At battery, by load circuit discharge process, cross when putting testing circuit and cell voltage being detected lower than 2.5 volts, sending controling instruction cuts off the load circuit of battery to controlled switch, prevents that battery from putting and causing polarization because of mistake.
Described controlled switch can adopt following two kinds of embodiment, certainly can adopt other modes with identical function to replace.
Embodiment 1:
As shown in Figure 3, described controlled switch comprises N-type field effect transistor I M1 and N-type field effect transistor II M2, described in the grid of described N-type field effect transistor I M1 is electrically connected on, overcharge testing circuit output, drain electrode connects battery cathode, and source electrode is connected to charging circuit output.When overcharging testing circuit and cell voltage detected and reach 4.2 volts of the first overcharged voltage threshold values, transmission is the grid to N-type field effect transistor I M1 lower than the low level of N-type field effect transistor I M1 cut-in voltage, N-type field effect transistor I M1 disconnects, and has cut off the charging circuit of battery, prevents over-charging of battery.
The grid of described N-type field effect transistor II M2 is electrically connected on described mistake and puts testing circuit output, and source electrode connects battery cathode, and drain electrode is connected to load circuit output.Served as when putting testing circuit and cell voltage being detected and be worth 2.5 volts lower than overdischarge pressure valve, transmission is the grid to N-type field effect transistor II lower than the low level of N-type field effect transistor II cut-in voltage, N-type field effect transistor II disconnects, cut off the load circuit of battery, preventing that battery from crossing puts, and avoids causing the polarization of battery.
Embodiment 2:
As shown in Figure 4, described controlled switch comprises relay one and relay two, the described output that overcharges testing circuit connects the base stage of a NPN triode Q1, the grounded emitter of described NPN triode Q1, the coil J1 of collector connection relay one, the coil J1 of described relay one is connected to anode, and the normally-closed contact J1-1 of described relay one is connected between battery cathode and charging circuit output.When overcharging testing circuit and cell voltage detected and reach the first overcharged voltage threshold values 4.2V, to NPN triode Q1, send high level, ground connection after NPN triode Q1 conducting, relay one coil J1 dead electricity, described normally-closed contact JI-1 disconnects, and cuts off charging circuit.
The output that described mistake is put testing circuit connects the base stage of a NPN triode Q2, the grounded emitter of described NPN triode Q2, the coil J2 of collector connection relay two, the coil J2 of described relay two is connected to anode, and the normally-closed contact J2-1 of described relay two is connected between battery cathode and load circuit input.Served as when putting testing circuit and cell voltage being detected lower than overdischarge pressure valve value 2.5V, to NPN triode Q2, sent high level, ground connection after NPN triode Q2 conducting, relay two coil J2 dead electricity, described normally-closed contact J2-1 disconnects, and cuts off load circuit.
As another embodiment, described control switch is comprised of a controllable silicon SCR and two fuses, described two fuses are composed in series fuse group, the two ends of described fuse group are connected between battery cathode and charging circuit output, the control end of described controllable silicon SCR is connected in the auxiliary output that overcharges testing circuit, the positive pole of the anodic bonding battery of controllable silicon SCR, the negative electrode of controllable silicon SCR is connected to the tie point of two fuses.When auxiliary when overcharging testing circuit MM3563B07RRE chip detection and reaching 4.3 volts to cell voltage, control end by the 6th pin OV output high level to controllable silicon SCR, controllable silicon SCR conducting, two described fuses fuse because of the fusing value of On current higher than fuse, cut off the charging circuit of battery, avoided over-charging of battery.Controllable silicon SCR has advantages of that control rate is fast, can conducting immediately after the high level signal that receives the 6th pin OV output of MM3563B07RRE chip, prevent over-charging of battery.
Be provided with in addition short-circuit detecting circuit and over-current detection circuit, an input of described short-circuit detecting circuit and over-current detection circuit is connected anode, another input after testing resistance R 1 is connected to battery cathode, in addition, described short-circuit detecting circuit and over-current detection circuit also have an input to be connected directly to battery cathode, and its output is electrically connected to described controlled switch.Described controlled switch can adopt the N-type field effect transistor II M2 of embodiment 1 or the relay two in embodiment 2, by the connecting circuit of short-circuit detecting circuit and over-current detection circuit detection battery, whether there is the danger of short circuit and overcurrent, and by controlled switch, cut off load circuit in the situation that short circuit or overcurrent being detected, avoid dangerous and occur.
Generally battery is used with 3-5 joint composition one battery pack, can in every batteries of battery pack, connect respectively described battery charge/discharge protection circuit, protection battery pack.
Except above preferred embodiment, the utility model also has other execution mode, those skilled in the art can make various changes and distortion according to the utility model, only otherwise depart from spirit of the present utility model, all should belong to the defined scope of the utility model claims.
Claims (9)
1. a battery charge/discharge protection circuit, comprise overcharge protection circuit and over-discharge protection circuit, the input of described overcharge protection circuit is connected between the positive pole and negative pole of a battery, the output of overcharge protection circuit has connected the output of a charging circuit, the input of described over-discharge protection circuit is also connected between the positive pole and negative pole of described battery, the output of described over-discharge protection circuit connects the input of a load circuit, it is characterized in that: also comprise an auxiliary overcharge protection circuit, the input of described auxiliary overcharge protection circuit connects between the positive pole and negative pole of described battery, the output of auxiliary overcharge protection circuit is also connected to described charging circuit output.
2. battery charge/discharge protection circuit according to claim 1; it is characterized in that: described auxiliary overcharge protection circuit comprises auxiliary overcharge testing circuit and control switch; the described auxiliary input that overcharges testing circuit connects between anode and negative pole; output is electrically connected to control switch, and described control switch is connected between battery cathode and charging circuit output.
3. battery charge/discharge protection circuit according to claim 2; it is characterized in that: described control switch is comprised of a controllable silicon (SCR) and two fuses; described two fuses are composed in series fuse group; the two ends of described fuse group are connected between battery cathode and charging circuit output; the control end of described controllable silicon (SCR) is connected in the auxiliary output that overcharges testing circuit; the positive pole of the anodic bonding battery of controllable silicon (SCR), the negative electrode of controllable silicon (SCR) is connected to the tie point of two fuses.
4. battery charge/discharge protection circuit according to claim 1; it is characterized in that: described overcharge protection circuit comprises and overcharges testing circuit and controlled switch; the control end of described controlled switch overcharges testing circuit output described in being electrically connected to; and described controlled switch is connected between described battery cathode and charging circuit output, described in overcharge between the positive pole and negative pole that testing circuit input is connected in battery.
5. battery charge/discharge protection circuit according to claim 4; it is characterized in that: described controlled switch comprises a N-type field effect transistor I(M1); described N-type field effect transistor I(M1) described in being electrically connected on, grid overcharges testing circuit output; drain electrode connects battery cathode, and source electrode is connected to charging circuit output.
6. battery charge/discharge protection circuit according to claim 4; it is characterized in that: described in overcharge testing circuit output and connect a NPN triode I(Q1) base stage; the grounded emitter of described NPN triode I (Q1); the coil of collector connection relay one (J1); the coil of described relay one (J1) is also connected to the positive pole of battery, and the normally-closed contact of described relay one (J1-1) is connected between battery cathode and charging circuit output.
7. battery charge/discharge protection circuit according to claim 4; it is characterized in that: described over-discharge protection circuit comprised puts testing circuit and described controlled switch; described mistake is put testing circuit output and is electrically connected to described controlled switch, and crosses and put testing circuit input and be connected between anode and negative pole.
8. battery charge/discharge protection circuit according to claim 7; it is characterized in that: described controlled switch comprises a N-type field effect transistor II(M2); the grid of described N-type field effect transistor II (M2) is electrically connected on described mistake and puts testing circuit output; source electrode connects battery cathode, and drain electrode is connected to load circuit output.
9. battery charge/discharge protection circuit according to claim 7; it is characterized in that: described mistake is put testing circuit output and connected a NPN triode II(Q2) base stage; the grounded emitter of described NPN triode II (Q2); the coil of collector connection relay two (J2); the coil of described relay two (J2) is also connected to the positive pole of battery, and the normally-closed contact of described relay two (J2-1) is connected between battery cathode and load circuit input.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320592762.6U CN203481801U (en) | 2013-09-24 | 2013-09-24 | Battery charging and discharging protection circuit |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320592762.6U CN203481801U (en) | 2013-09-24 | 2013-09-24 | Battery charging and discharging protection circuit |
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| CN203481801U true CN203481801U (en) | 2014-03-12 |
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| CN201320592762.6U Expired - Fee Related CN203481801U (en) | 2013-09-24 | 2013-09-24 | Battery charging and discharging protection circuit |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104466917A (en) * | 2014-11-14 | 2015-03-25 | 浙江超威创元实业有限公司 | Electric vehicle lithium battery management system |
| CN110419152A (en) * | 2017-03-14 | 2019-11-05 | 株式会社杰士汤浅国际 | Protective device |
-
2013
- 2013-09-24 CN CN201320592762.6U patent/CN203481801U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104466917A (en) * | 2014-11-14 | 2015-03-25 | 浙江超威创元实业有限公司 | Electric vehicle lithium battery management system |
| CN110419152A (en) * | 2017-03-14 | 2019-11-05 | 株式会社杰士汤浅国际 | Protective device |
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