CN205407294U - Battery measurement protection system , battery module and car - Google Patents
Battery measurement protection system , battery module and car Download PDFInfo
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- CN205407294U CN205407294U CN201521071404.6U CN201521071404U CN205407294U CN 205407294 U CN205407294 U CN 205407294U CN 201521071404 U CN201521071404 U CN 201521071404U CN 205407294 U CN205407294 U CN 205407294U
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Abstract
The utility model provides a battery measurement protection system, battery module and car, including the control circuit who establishes ties and have battery module, relay and charging and discharging module's charge -discharge major loop and be used for the control relay break -make in proper order, wherein, control circuit is including the coil of the control source of establishing ties in proper order, relay and be used for responding to the PTC thermistor of battery module temperature. The utility model provides an among the battery measurement protection system, need not to sample to the temperature of battery, also need not handle and compare sample data, reduced intermediate link, the possibility that has reduced the malfunction and be failure to actuate, more direct, more accurate realization is to the control of circuit, can cross at battery module and fill or cross under the condition of putting, under the condition of battery module high temperature, can in time react and control relay disconnection charge -discharge major loop.
Description
Technical field
This utility model relates to electrokinetic cell protection field, particularly relates to a kind of battery charging and discharging protection system, battery modules and automobile.
Background technology
In recent years, new-energy automobile quickly grows, and the use of new-energy automobile is more and more universal；In new-energy automobile, the security performance of electrokinetic cell is also more and more higher, therefore, on traditional electrokinetic cell basis, design safety is monitored or protection system, it is ensured that the safety in electrokinetic cell use procedure, also becomes a direction of electrokinetic cell development.
In the use procedure of electrokinetic cell, usually cause that temperature of powered cell raises because of overcharge or overdischarge, if can not detect and realize overcharging or crossing the control put timely, then it is likely to cause electrokinetic cell because temperature is too high or crosses the generation of the situations such as spontaneous combustion or blast that conductance causes.
In prior art, in electrokinetic cell detection and protection, it is generally adopted the break-make of BMS dynamics of management battery charge and discharge process; by signals such as the BMS battery temperatures collected, by the analysis of BMS, when or mistake overheated at battery flows; control electrokinetic cell disconnecting circuit, cut off circuit in time.BMS can be passed through and directly control switching on-off of loop, electrokinetic cell place, the break-make that BMS management is connected on the relay in loop, electrokinetic cell place can also be passed through, concrete, switch can be set in the control loop of relay, control the opening and closing of switch again through BMS, and then control the break-make of relay.And in the existing mode by BMS management control circuit break-make, once BMS breaks down, whether action failure or signal processing fault, capital causes loop is kept normal open, or major loop is constantly on, or the contact of relay connects always, and namely major loop is constantly on, the abnormality of electrokinetic cell can not be released in time, the appearance of the situation caught fire or explode may finally be caused.
In recent years, market occurs in that many cases electric motor car in use, such as, in the process of charge or discharge, BMS manages Module Fail, cause that the battery of electric motor car is when overcharging or excessively put, BMS can not cut off circuit in time, and then causes vehicle fire, the accident even caused casualties.
Summary of the invention
It is intended to solve above-mentioned technical problem to a certain extent at this utility model; there is provided a kind of can when battery module overcharge or cross put; when battery module temperature is too high, it is possible to react and control the battery charging and discharging protection system of relay disconnection discharge and recharge major loop in time.
This utility model provides a kind of battery charging and discharging protection system, and discharge and recharge major loop, described discharge and recharge major loop includes first interface, the second interface and is connected on the battery module between first interface and the second interface and relay；Controlling loop, described control loop is for controlling the break-make of described relay；Wherein, what described control loop included being sequentially connected in series control power supply, relay coil and for the PTC thermistor of induced cell module temperature.
In this utility model, battery charging and discharging protection system includes discharge and recharge major loop and for controlling the control loop of relay on-off；Discharge and recharge major loop is exactly charging and discharging circuit in general sense, and when first interface and the second interface access external loading, battery module is that load is powered, and by the break-make of Control battery module powering load circuit；When first interface and the second interface access external recharging apparatus, when being further civil power, charging module or city supply electricity to charging battery module, and by the break-make of Control charging circuit.Whether charging or electric discharge, is all formed with the discharge and recharge major loop of relay of connecting outside battery module, and can pass through the break-make of Control discharge and recharge major loop.Meanwhile, controlling of relay being controlled loop includes being sequentially connected in series control power supply, relay coil and for the PTC thermistor of induced cell module temperature.Controlling power supply is the coil power supply of relay, and then the contact of relay is produced the suction-combining force, turns on whole discharge and recharge major loop；Put or when other abnormal conditiones cause battery module temperature to raise because overcharging or crossing when battery module, the temperature that PTC thermistor senses raises, PTC thermistor resistance is raised, and then reduce the electric current controlled in loop, the coil suction controlling in loop is declined, so that the contact of relay disconnects, cut off the electric current of discharge and recharge major loop.In the battery charging and discharging protection system that this utility model provides; directly PTC thermistor is set in the control loop of relay; allow the temperature of this PTC thermistor induced cell module; as long as battery module temperature raises; resistance increases because temperature raises just to make PTC thermistor; and then reduce control loop current, disconnect the contact of relay.In above process, it is not necessary to the temperature of battery is sampled, without sampled data being processed and comparison, decrease intermediate link, reduce misoperation and the probability being failure to actuate, realize the control to circuit more directly, more accurately；Can when battery module overcharge or cross put, when battery module temperature is too high, it is possible to react in time and control relay disconnect discharge and recharge major loop.
Further, described first interface and the second interface are used for connecting external loading or charging device.
Further, described battery charging and discharging protection system also includes management module, and described control loop is in series with switch module, and described management module is connected with described switch module, and described management module is for controlling the break-make of described switch module.
Preferably, described management module and described control power sources in series, described control power supply is described management module for power supply.
Preferably, being in series with DC-DC module between described battery module and described management module, described battery module is described management module for power supply by DC-DC module.
Further, described management module gathers the temperature of battery module by described PTC thermistor.
Further, described PTC thermistor is multiple, and the plurality of PTC thermistor is connected in series；Described battery module includes multiple cell, and each PTC thermistor gathers the temperature of a cell.
Further, described PTC thermistor is bonded on battery module by thermal plastic insulation.
Preferably, described battery module is made up of multiple cells, and described PTC thermistor is multiple, and the corresponding PTC thermistor of each cell, described PTC thermistor is bonded on corresponding cell by thermal plastic insulation.
This utility model additionally provides a kind of battery modules, and this battery modules includes the battery charging and discharging protection system that this utility model provides.
This utility model additionally provides a kind of automobile, including the battery modules that this utility model provides.
Additional aspect of the present utility model and advantage will part provide in the following description, and part will become apparent from the description below, or is recognized by practice of the present utility model.
Accompanying drawing explanation
Above-mentioned and/or additional aspect of the present utility model and advantage are from conjunction with will be apparent from easy to understand the accompanying drawings below description to embodiment, wherein:
Fig. 1 is the system composition schematic diagram of battery charging and discharging protection system in an embodiment.
Fig. 2 is the system composition schematic diagram of battery charging and discharging protection system in another embodiment.
Fig. 3 is the system composition schematic diagram of battery charging and discharging protection system in another embodiment.
Accompanying drawing labelling
Battery module 10；Relay 20；Contact 201；Coil 202；First interface 301；Second interface 302；PTC thermistor 40；Control power supply 50；Management module 60；Switch module 601；DC-DC module 602.
Detailed description of the invention
Being described below in detail embodiment of the present utility model, the example of described embodiment is shown in the drawings, and wherein same or similar label represents same or similar element or has the element of same or like function from start to finish.The embodiment described below with reference to accompanying drawing is illustrative of, it is intended to be used for explaining this utility model, and it is not intended that to restriction of the present utility model.
In description of the present utility model, it will be appreciated that, term " length ", " width ", " thickness ", " on ", D score, " front ", " afterwards ", " left side ", " right side ", " vertically ", " level ", " top ", " end ", " interior ", orientation or the position relationship of the instruction such as " outward " are based on orientation shown in the drawings or position relationship, it is for only for ease of description this utility model and simplifies description, rather than the device of instruction or hint indication or element must have specific orientation, with specific azimuth configuration and operation, therefore it is not intended that to restriction of the present utility model.Additionally, term " first ", " second " are only for descriptive purposes, and it is not intended that indicate or imply relative importance or the implicit quantity indicating indicated technical characteristic.Thus, define " first ", the feature of " second " can express or implicitly include one or more these features.In description of the present utility model, " multiple " are meant that two or more, unless otherwise expressly limited specifically.
In this utility model, unless otherwise clearly defined and limited, the term such as term " installation ", " being connected ", " connection ", " fixing " should be interpreted broadly, for instance, it is possible to it is fixing connection, it is also possible to be removably connect, or connect integratedly；Can be mechanically connected, it is also possible to be electrical connection；Can be joined directly together, it is also possible to be indirectly connected to by intermediary, it is possible to be the connection of two element internals.For the ordinary skill in the art, it is possible to understand above-mentioned term concrete meaning in this utility model as the case may be.
As shown in Figure 1; this utility model provides a kind of battery charging and discharging protection system; discharge and recharge major loop, described discharge and recharge major loop includes first interface the 301, second interface 302 and is connected on the battery module 10 between first interface 301 and the second interface 302 and relay 20；Controlling loop, described control loop is for controlling the break-make of described relay；Wherein, control that loop includes being sequentially connected in series control power supply 50, relay 20 coil 202 and for the PTC thermistor 40 of induced cell module 10 temperature.
In this utility model, battery charging and discharging protection system includes discharge and recharge major loop and for controlling the control loop of relay 20 break-make, and discharge and recharge major loop is exactly charging and discharging circuit in general sense.When first interface 301 and the second interface 302 connect external loading, battery module 10 is powered for load, and is controlled the break-make of battery module 10 powering load circuit by relay 20；When first interface 301 and the second interface 302 connect external recharging apparatus, when being further civil power, charging device or city supply electricity to battery module 10 and charge, and are controlled the break-make of charging circuit by relay 20.Whether charging or electric discharge, at the outer discharge and recharge major loop being all formed with relay 20 of connecting of battery module 10, and can control the break-make of discharge and recharge major loop by relay 20.
In particular, the contact 201 of relay 20 is used for being switched on or switched off discharge and recharge major loop, it is achieved the break-make of discharge and recharge major loop is controlled by relay 20.
Meanwhile, controlling of relay 20 being controlled loop includes being sequentially connected in series control power supply 50, relay 20 coil 202 and for the PTC thermistor 40 of induced cell module 10 temperature.Control the coil 202 that power supply 50 is relay 20 to power, and then the contact 201 of relay 20 is produced the suction-combining force, turn on whole discharge and recharge major loop；Put or when other abnormal conditiones cause battery module 10 temperature to raise because overcharging or crossing when battery module 10, the temperature that PTC thermistor 40 senses raises, PTC thermistor 40 resistance is raised, and then reduce the electric current controlled in loop, coil 202 suction controlling in loop is declined, so that the contact 201 of relay 20 disconnects, cut off the electric current of discharge and recharge major loop.In the battery charging and discharging protection system that this utility model provides; directly PTC thermistor 40 is set in the control loop of relay 20; allow the temperature of this PTC thermistor 40 induced cell module 10; as long as battery module 10 temperature raises; resistance increases because temperature raises just to make PTC thermistor 40; and then reduce control loop current, disconnect the contact 201 of relay 20.In above process, it is not necessary to the temperature of battery is sampled, without sampled data being processed and comparison, decrease intermediate link, reduce misoperation and the probability being failure to actuate, realize the control to circuit more directly, more accurately.Generally, PTC thermistor 40 is fit together by thermal plastic insulation and battery module 10, so that the temperature obtaining battery module 10 surface that PTC thermistor 40 can be sensitiveer, in time, action accurately；Can when battery module overcharge or cross put, when battery module temperature is too high, it is possible to react in time and control relay disconnect discharge and recharge major loop.
In embodiments more of the present utility model, it is possible to control the break-make of relay 20 to replace the break-make of relay 20 is controlled by prior art by management module 60 with being connected on the PTC thermistor 40 controlled on loop.In other words, cancel management module 60 and the break-make of relay 20 is controlled, substitute by the PTC thermistor 40 being connected on control loop completely.In such manner, it is possible to realize to major loop more directly, more accurately break-make control.
Certainly, except the mode substituted, as in a preferred embodiment of the present utility model, it is possible in the battery charging and discharging protection system with management module 60, add above-mentioned PTC thermistor 40；That is; on the basis of technique scheme, battery charging and discharging protection system also includes management module 60, is in series with switch module 601 on control loop simultaneously; management module 60 is connected with switch module 601, and this management module 60 is for controlling the break-make of switch module 601.In actual design process, the break-make of switch module 601 can be controlled temperature and be set smaller than the temperature of PTC thermistor 40 action, so, in certain temperature range, can pass through to manage the module 60 effect to switch module 601, control the break-make of relay 20；During beyond this temperature range, time management module 60 goes wrong again simultaneously, it is possible to by the change of PTC thermistor 40, realize the break-make to relay 20 and control.In such scheme; the duplicate protection to discharge and recharge major loop can be realized; no matter it is PTC thermistor 40 or management module 60; it is all realize the control to relay 20 break-make; and then reduce the probability that accident occurs; even if when some parts go wrong or damage, be still able to discharge and recharge major loop is played good break-make control action, improve the security performance of battery.
In an embodiment of the present utility model, above-mentioned management module 60 can directly utilize the control power supply 50 controlled in loop, as the power source of management module 60；Save the arrangement of circuit, meanwhile, also allow for design.
As it is shown on figure 3, in an embodiment, the feeder ear (i.e. two ends up and down in figure) of management module 60 is connected to the two ends controlling power supply 50 controlling in loop, powered for management module 60 by controlling power supply 50；Meanwhile, management module gathers the temperature of battery module 10 by PTC thermistor 40, to realize the control to switch module 601.In figure, one end being connected with PTC thermistor 40 on the left of management module 60, it is possible to be considered as signals collecting end；And manage the one end being connected on the downside of module 60 with switch module 601, it is possible to it is considered as controlling end.
In a preferred embodiment, controlling power supply 50 can be connected in discharge and recharge major loop by DC-DC module 602, is in series with another switch module 601 between control power supply 50 and discharge and recharge major loop simultaneously.In the present embodiment, it is possible to by closing switch module 601, it is charged controlling power supply 50 with battery module 10.
In another embodiment of the present utility model, above-mentioned management module 60 can also use the electricity in discharge and recharge major loop；By arranging DC-DC module 602 between discharge and recharge major loop and management module 60, after being reduced by the voltage in discharge and recharge major loop, it is powered to management module 60.
Simultaneously, it is possible to for above-mentioned management module 60, special sampling structure is set, such as conventional in electrokinetic cell field sampling terminal etc.；It addition, a preferred mode of the present utility model, it is also possible to directly use above-mentioned PTC thermistor 40 as the sampling structure of management module 60.Management module 60 is connected with PTC thermistor 40, and in more detail, the sampling input of management module 60 or its BIC is connected with PTC thermistor 40, is gathered the temperature of battery module 10 by PTC thermistor 40.Ensure that the judgement/action foundation in management module 60, consistent with the control action temperature of PTC thermistor 40, to ensure the stability of System Operation.
As a preferred embodiment of the present utility model, PTC thermistor 40 can be multiple, and multiple PTC thermistor 40 are connected in series；Meanwhile, battery module 10 includes multiple cell, and each PTC thermistor 40 gathers the temperature of a cell.These PTC thermistor 40 are connected on one and control in loop, when the temperature that wherein any one PTC thermistor 40 senses reaches given requirements, the resistance of this PTC thermistor 40 can increase rapidly, thus reducing the electric current in whole control loop, disconnect the relay 20 being connected in discharge and recharge major loop.That is, the temperature of each cell is detected, and for the cell of diverse location, the transformation temperature of the PTC thermistor 40 of its correspondence is also not quite similar.Even so, by the way, there is the situation that temperature is too high in any cell, can directly control the break-make of discharge and recharge major loop, to ensure the general safety of battery module 10.
In another embodiment of the present utility model, first interface 301 and the second interface 302 multiple load of external connection, it is connected in parallel with each other between multiple loads, a relay 20 it is in series with between each load and battery module 10, the corresponding control loop being used for controlling relay 20 break-make of each relay 20, shares a PTC thermistor 40 in multiple control loops.Contrary with the mode of multiple PTC thermistor 40, in the present embodiment, adopt a PTC thermistor 40, for multiple control loops；When this situation is used in a battery module 10 for multiple loaded work piece, such as a battery module 10 is that multiple multiple loads parallel with one another are powered；So in actual use, as long as a PTC thermistor 40 controls the power supply of multiple load, once the temperature of battery module 10 is too high, the resistance of PTC thermistor 40 sharply increases, relay 20 in multiple control loops is all disconnected simultaneously, so that the load disconnecting circuit of multiple parallel connections is connected, quit work.In the present embodiment, achieve the break-make to multiple power supply circuits by a PTC thermistor 40 and control, provide cost savings, improve action consistency, it is ensured that the security performance of battery module 10.
In embodiment of the present utility model, PTC thermistor 40 is bonded on battery module 10 by thermal plastic insulation, includes here on the inclusion of battery module 10 or the surface of shell of each cell in battery module 10, is all possible.
Further, in a preferred embodiment of the present utility model, battery module 10 is made up of multiple cells, PTC thermistor 40 is multiple, the corresponding PTC thermistor 40 of each cell, wherein, PTC thermistor 40 is bonded on corresponding cell by thermal plastic insulation, and multiple PTC thermistor 40 are connected on control loop.As in figure 2 it is shown, two PTC thermistor 40 are connected on control loop, two PTC thermistor 40 are bonded on corresponding cell by thermal plastic insulation simultaneously；Certainly, in addition, it is also possible to be three, four or more PTC thermistor 40.In this case, the break-make to relay 20 can not only be realized by management module 60 to control, and the temperature of each cell, the condition controlling relay 20 break-make can be become, so, in battery module 10, any joint cell occurs in that the situation that temperature is too high, can control relay 20 in time and disconnect, reduce battery module 10 because of overheated spontaneous combustion or blast possibility, improve the safe application performance of electrokinetic cell.
In embodiments more of the present utility model, the number of relay 20 is not by PTC thermistor 40 number quantitative limitation, it is possible to be that a relay 20 is controlled by even individual PTC thermistor 40, it is also possible to be that multiple relay 20 is controlled by a PTC thermistor 40.As long as can guarantee that, in use, PTC thermistor 40 resistance is sufficiently small, the contact 201 of the enough closing relays 20 of suction that coil 202 electric current produces；When temperature raises, PTC thermistor 40 increases, and coil 202 electric current declines, and makes contact 201 disconnect.
In the battery charging and discharging protection system that this utility model provides, except battery module 10 is managed control by BMS management module 60, it is also provided with PTC thermistor 40；Even if management module 60 lost efficacy, electric motor car occurs in that overheat condition, or can pass through PTC thermistor 40 block system relay 20, it is ensured that the usage safety performance of battery module 10.
In embodiments more of the present utility model, PTC thermistor 40 preferentially selects the material that Curie temperature is relatively low, more specifically, it is preferable that Curie temperature is between 60-120 degree.This interval be battery module 10 can the scope of normal operation, PTC thermistor 40 is as, while sensor, also functioning to control the effect of relay 20 break-make；When temperature exceedes certain value, this value is considered as the safe handling temperature upper limit of battery module 10, then PTC thermistor 40 resistance sharply increases so that relay 20 coil 202 electric current declines, thus disconnecting relay 20, cuts off major loop.
More specifically, as shown in the figures 1 and 2, relay 20 includes the contact 201 being connected in discharge and recharge major loop, and when contact 201 closes, discharge and recharge major loop turns on；When contact 201 separates, discharge and recharge major loop disconnects；And with the PTC thermistor 40 in the coil 202 composition control loop being wound around on relay 20 and control power supply 50 and switch module 601, be all located on control loop.Under normal condition, the electric current in coil 202 provides enough suction can to contact 201 so that contact 201 closes, and then discharge and recharge major loop is turned on；When battery module 10 temperature is too high, PTC thermistor 40 resistance increases so that the current reduction in coil 202, and then the suction on contact 201 is reduced so that contact 201 separately, disconnects discharge and recharge major loop, plays a protective role.
This utility model additionally provides a kind of battery modules; including the battery charging and discharging protection system that this utility model provides; in other words; various parts in the battery charging and discharging protection system that this utility model provides; it is all disposed within battery modules, and collectively constitutes the battery charging and discharging protection system that this utility model provides.
Meanwhile, this utility model additionally provides a kind of automobile, and this automobile is mounted with above-mentioned battery modules.
In the description of this specification, specific features, structure, material or feature that the description of reference term " embodiment ", " some embodiments ", " example ", " concrete example " or " some examples " etc. means in conjunction with this embodiment or example describe are contained at least one embodiment of the present utility model or example.In this manual, the schematic representation of above-mentioned term is not necessarily referring to identical embodiment or example.And, the specific features of description, structure, material or feature can combine in an appropriate manner in any one or more embodiments or example.
Although above it has been shown and described that embodiment of the present utility model, it is understandable that, above-described embodiment is illustrative of, it is not intended that to restriction of the present utility model, above-described embodiment can be changed in scope of the present utility model when without departing from principle of the present utility model and objective, revises, replace and modification by those of ordinary skill in the art.
Claims (11)
1. a battery charging and discharging protection system, including
Discharge and recharge major loop, described discharge and recharge major loop includes first interface, the second interface and is connected on the battery module between first interface and the second interface and relay；
Controlling loop, described control loop is for controlling the break-make of described relay；
It is characterized in that, what described control loop included being sequentially connected in series control power supply, relay coil and for the PTC thermistor of induced cell module temperature.
2. battery charging and discharging according to claim 1 protection system, it is characterised in that described first interface and the second interface are used for connecting external loading or charging device.
3. battery charging and discharging according to claim 1 protection system, it is characterised in that described battery charging and discharging protection system also includes management module, and described control loop is in series with switch module, and described management module is for controlling the break-make of described switch module.
4. battery charging and discharging according to claim 3 protection system, it is characterised in that described management module and described control power sources in series, described control power supply is described management module for power supply.
5. battery charging and discharging according to claim 3 protection system, it is characterised in that being in series with DC-DC module between described battery module and described management module, described battery module is described management module for power supply by DC-DC module.
6. battery charging and discharging according to claim 3 protection system, it is characterised in that described management module gathers the temperature of battery module by described PTC thermistor.
7. battery charging and discharging according to claim 1 protection system, it is characterised in that described PTC thermistor is multiple, and the plurality of PTC thermistor is connected in series；Described battery module includes multiple cell, and each PTC thermistor gathers the temperature of a cell.
8. battery charging and discharging according to claim 6 protection system, it is characterised in that described PTC thermistor is bonded on battery module by thermal plastic insulation.
9. battery charging and discharging according to claim 8 protection system; it is characterized in that; described battery module is made up of multiple cells; described PTC thermistor is multiple; the corresponding PTC thermistor of each cell; described PTC thermistor is bonded on corresponding cell by thermal plastic insulation, and the plurality of PTC thermistor is connected on described control loop.
10. a battery modules, it is characterised in that include the battery charging and discharging protection system described in claim 1-9 any one.
11. an automobile, it is characterised in that described automobile includes the battery modules described in claim 10.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201521071404.6U CN205407294U (en) | 2015-12-21 | 2015-12-21 | Battery measurement protection system , battery module and car |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201521071404.6U CN205407294U (en) | 2015-12-21 | 2015-12-21 | Battery measurement protection system , battery module and car |
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| CN205407294U true CN205407294U (en) | 2016-07-27 |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109687541A (en) * | 2017-10-19 | 2019-04-26 | 新盛力科技股份有限公司 | Battery powdered device |
| CN113165528A (en) * | 2018-12-28 | 2021-07-23 | 柏恩氏株式会社 | Secondary battery circuit and control method thereof |
| CN113381086A (en) * | 2020-11-09 | 2021-09-10 | 深圳市优瑞特检测技术有限公司 | Lithium battery overheating protection system and method |
-
2015
- 2015-12-21 CN CN201521071404.6U patent/CN205407294U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109687541A (en) * | 2017-10-19 | 2019-04-26 | 新盛力科技股份有限公司 | Battery powdered device |
| CN113165528A (en) * | 2018-12-28 | 2021-07-23 | 柏恩氏株式会社 | Secondary battery circuit and control method thereof |
| CN113381086A (en) * | 2020-11-09 | 2021-09-10 | 深圳市优瑞特检测技术有限公司 | Lithium battery overheating protection system and method |
| CN113381086B (en) * | 2020-11-09 | 2022-06-10 | 深圳市优瑞特检测技术有限公司 | Lithium battery overheating protection system and method |
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