CN106646264B - Battery discharge tester - Google Patents
Battery discharge tester Download PDFInfo
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- CN106646264B CN106646264B CN201710041615.2A CN201710041615A CN106646264B CN 106646264 B CN106646264 B CN 106646264B CN 201710041615 A CN201710041615 A CN 201710041615A CN 106646264 B CN106646264 B CN 106646264B
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- 238000001514 detection method Methods 0.000 claims abstract description 40
- 238000012360 testing method Methods 0.000 claims abstract description 14
- 239000003990 capacitor Substances 0.000 claims description 18
- 238000004146 energy storage Methods 0.000 claims description 9
- 238000007599 discharging Methods 0.000 claims description 2
- 238000004519 manufacturing process Methods 0.000 abstract description 5
- 229910052744 lithium Inorganic materials 0.000 description 13
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 description 11
- 230000006872 improvement Effects 0.000 description 8
- 239000000243 solution Substances 0.000 description 8
- 230000032683 aging Effects 0.000 description 6
- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 description 4
- 238000010586 diagram Methods 0.000 description 4
- 229910001416 lithium ion Inorganic materials 0.000 description 4
- 230000017525 heat dissipation Effects 0.000 description 2
- 229910000733 Li alloy Inorganic materials 0.000 description 1
- 238000009825 accumulation Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 230000006870 function Effects 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 239000001989 lithium alloy Substances 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 230000003446 memory effect Effects 0.000 description 1
- 230000006386 memory function Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000007773 negative electrode material Substances 0.000 description 1
- 239000011255 nonaqueous electrolyte Substances 0.000 description 1
- 230000010355 oscillation Effects 0.000 description 1
- 238000013021 overheating Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 230000003014 reinforcing effect Effects 0.000 description 1
- 239000000523 sample Substances 0.000 description 1
- 230000001360 synchronised effect Effects 0.000 description 1
- 230000000007 visual effect Effects 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/36—Arrangements for testing, measuring or monitoring the electrical condition of accumulators or electric batteries, e.g. capacity or state of charge [SoC]
- G01R31/392—Determining battery ageing or deterioration, e.g. state of health
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Secondary Cells (AREA)
- Tests Of Electric Status Of Batteries (AREA)
Abstract
The battery discharge tester comprises an interface end, a load unit, a detection unit, a control unit, a storage unit and an output unit: the interface end is used for being connected with the anode and the cathode of the battery to be tested; the load unit is used for consuming the electric energy of the battery to be tested; the detection unit is used for detecting the voltage and the discharge current of the battery to be detected and transmitting detection values to the control unit, the storage unit and the output unit; the control unit compares the discharge current detection value with a preset value, and adjusts the discharge current of the battery to be tested according to the comparison result; the storage unit is used for storing the test data of the detection unit; the output unit is used for outputting the test data of the detection unit. The invention provides a battery discharge tester which has simple structure, easy manufacture and low cost.
Description
Technical Field
The invention belongs to the technical field of testing instruments, and particularly relates to a battery discharge tester.
Background
Lithium batteries are a type of batteries using a nonaqueous electrolyte solution with lithium metal or a lithium alloy as a negative electrode material. Lithium batteries can be broadly divided into two categories: lithium metal batteries and lithium ion batteries. Wherein the lithium ion battery does not contain lithium in a metallic state and is rechargeable.
With the wide use of digital products such as mobile phones and notebook computers, lithium ion batteries are widely used in such products with excellent performance, and gradually develop into other product application fields, so that the lithium ion batteries are currently becoming the main stream products of lithium batteries.
The lithium battery has no memory effect, so the cycle times are large, and the service life is long. At the same time, lithium batteries also have drawbacks, such as the inability to overcharge or overdischarge, which would otherwise greatly impair the life of the lithium battery.
In order to ensure the quality of the lithium battery, the lithium battery needs to be subjected to a strict aging test before leaving the factory, so as to ensure that the discharge performance of the lithium battery under the aging condition reaches the standard. The traditional aging test mainly uses a comprehensive measuring instrument, the price of the measuring instrument is high, and the measuring instrument causes great burden on the manufacturing cost of the lithium battery.
Disclosure of Invention
In order to overcome the defects of the prior art, the invention provides a battery discharge tester which has extremely high cost performance.
The aim of the invention is achieved by the following technical scheme:
the battery discharge tester comprises an interface end, a load unit, a detection unit, a control unit, a storage unit and an output unit:
the interface end is used for being connected with the anode and the cathode of the battery to be tested;
the load unit is used for consuming the electric energy of the battery to be tested;
the detection unit is used for detecting the voltage and the discharge current of the battery to be detected and transmitting detection values to the control unit, the storage unit and the output unit;
the control unit compares the discharge current detection value with a preset value, and adjusts the discharge current of the battery to be tested according to the comparison result;
the storage unit is used for storing the test data of the detection unit;
the output unit is used for outputting the test data of the detection unit.
As an improvement of the above technical solution, an LC energy storage unit is disposed between the load unit and the battery to be tested, and the LC energy storage unit is configured to store discharge energy of the battery to be tested, and use the discharge energy to discharge the load unit.
As a further improvement of the technical scheme, the LC energy storage unit comprises an inductor and a capacitor, wherein the inductor is connected in series between the positive electrode of the battery to be tested and the capacitor, the other end of the capacitor is connected with the negative electrode of the battery to be tested, and two ends of the capacitor are respectively connected with two ends of the load unit.
As a further improvement of the above technical solution, the detection unit includes:
a voltage detector for detecting the voltage of the battery to be tested;
a current detector for detecting a discharge current of the battery to be measured;
and the temperature detector is used for detecting the temperature of the battery discharge tester.
As a further improvement of the above technical solution, the control unit includes a voltage controller, a current controller, and a temperature controller:
the voltage controller is used for comparing the detection value of the voltage detector with the lower limit value of the discharge voltage, and adjusting the discharge state of the battery to be tested according to the comparison result;
the current controller is used for comparing the detection value of the current detector with a preset discharge current value, and adjusting the discharge current of the battery to be tested according to the comparison result;
and the temperature controller is used for comparing the detection value of the temperature detector with a temperature threshold value, and adjusting the discharge state of the battery to be detected according to the comparison result.
As a further improvement of the above technical solution, the battery discharge tester further comprises a power supply unit for providing a constant operating voltage for the battery discharge tester.
As a further improvement of the above technical solution, the battery discharge tester further includes an operation unit for a user to input an adjustment instruction to the battery discharge tester.
As a further development of the above-mentioned solution, the load unit comprises a resistor.
As a further improvement of the above technical solution, the load unit is connected with a heat dissipation unit for dissipating heat of the load unit.
As a further improvement of the technical scheme, the battery discharge tester further comprises an alarm unit for alarming or prompting.
The beneficial effects of the invention are as follows: the battery discharge tester is simple in structure, easy to manufacture and low in cost.
In order to make the above objects, features and advantages of the present invention more comprehensible, preferred embodiments accompanied with figures are described in detail below.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are needed in the embodiments will be briefly described below, it being understood that the following drawings only illustrate some embodiments of the present invention and therefore should not be considered as limiting the scope, and other related drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
Fig. 1 is an overall schematic diagram of a battery discharge tester provided in embodiment 1 of the present invention;
fig. 2 is a first schematic diagram of a battery discharge tester according to embodiment 1 of the present invention;
fig. 3 is a second schematic view of the battery discharge tester provided in embodiment 1 of the present invention;
fig. 4 is a third schematic diagram of the battery discharge tester provided in embodiment 1 of the present invention;
fig. 5 is a fourth schematic diagram of the battery discharge tester provided in embodiment 1 of the present invention. Description of main reference numerals:
1000-battery discharge tester, 0100-interface terminal, 0200-load unit, 0300-detection unit, 0310-voltage detector, 0320-current detector, 0330-temperature detector, 0400-control unit, 0410-voltage controller, 0420-current controller, 0430-temperature controller, 0500-storage unit, 0600-output unit, 0700-LC energy storage unit, 0710-inductance, 0720-capacitance, 0730-relay, 0740-diode, 0750-MOS tube, 0800-power supply unit, 0810-reference voltage module, 0820-PWM control chip, 0900-alarm unit.
Detailed Description
In order to facilitate an understanding of the present invention, a battery discharge tester will be more fully described with reference to the accompanying drawings. A preferred embodiment of a battery discharge tester is shown in the drawings. However, the battery discharge tester may be implemented in many different forms and is not limited to the embodiments described herein. Rather, the purpose of these embodiments is to provide a more thorough and complete disclosure of the battery discharge tester.
It will be understood that when an element is referred to as being "fixed to" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. In contrast, when an element is referred to as being "directly on" another element, there are no intervening elements present. The terms "vertical," "horizontal," "left," "right," and the like are used herein for illustrative purposes only.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used herein in the description of the battery discharge tester is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "and/or" as used herein includes any and all combinations of one or more of the associated listed items.
Example 1
Referring to fig. 1 and fig. 2 in combination, the battery discharge tester 1000 includes an interface 0100, a load unit 0200, a detection unit 0300, a control unit 0400, a storage unit 0500, and an output unit 0600.
Preferably, the battery discharge tester 1000 is provided with a closed housing for protecting each functional unit of the battery discharge tester 1000 and improving the moving convenience and application range of the battery discharge tester 1000.
Referring to fig. 3, the battery discharge tester 1000 preferably further includes a power supply unit 0800, and the power supply unit 0800 is used for providing a constant operation voltage to the battery discharge tester 1000.
Further preferably, the power supply unit 0800 includes a reference voltage module 0810 and a PWM (pulse width modulation) control chip 0820. The reference voltage module 0810 is used for acquiring voltage from the battery to be tested and supplying power to the PWM control chip 0820, and the PWM control chip 0820 is used for modulating and providing stable operation voltage to the battery discharge tester 1000. Generally, the PWM control chip 0820 can be self-designed or can be purchased from a market as a standard finished product.
Thus, the function of the battery discharge tester 1000 can be realized without adding an additional power supply.
The interface terminal 0100 is used for connecting with the anode and the cathode of the battery to be tested. Specifically, the interface end 0100 may be a connector or a jack disposed on the closed casing of the battery discharge tester 1000, and the connection between the battery discharge tester 1000 and the battery to be tested can be achieved only by simple plugging.
The load unit 0200 is used for consuming the electric energy of the battery to be tested. Specifically, the load unit 0200 has a load for realizing discharge of the battery to be tested, thereby realizing aging test of the battery to be tested. The aging test refers to a process of performing corresponding condition reinforcing experiments on the aging condition of the product by simulating various factors involved in the practical use condition of the product.
Preferably, the load unit 0200 comprises a resistor. The resistor is also called a resistor, absorbs the energy of the battery to be tested and converts the energy into heat energy to be dissipated. The resistor acts as a load, is safer than a transistor without the possibility of breakdown or avalanche damage, is quite low in cost, and effectively reduces the manufacturing cost of the battery discharge tester 1000.
Further preferably, the resistor is a load resistor. The load resistor has ultralow inductance, does not generate oscillation, and avoids damage to other elements in the loop. Meanwhile, the load resistor has good heat dissipation performance, and heat accumulation is avoided to cause heat damage to the battery discharge tester 1000.
Referring to fig. 4, preferably, an LC energy storage unit 0700 is disposed between the load unit 0200 and the battery to be tested, the LC energy storage unit 0700 is used for storing discharge energy of the battery to be tested, and the stored discharge energy is used for discharging the load unit 0200.
Further preferably, the LC energy storage unit 0700 includes an inductor 0710 and a capacitor 0720, the inductor 0710 is connected in series between the positive electrode of the battery to be tested and the capacitor 0720, the other end of the capacitor 0720 is connected with the negative electrode of the battery to be tested, and two ends of the capacitor 0720 are respectively connected with two ends of the load unit 0200.
Still more preferably, a relay 0730 and a diode 0740 connected in parallel are further arranged between the inductor 0710 and the positive electrode of the battery to be tested. Further, a positive temperature coefficient thermistor (PTC) is connected in series to the diode 0740, and the loop is protected by temperature control. In addition, diode 0740 and PTC are serially connected to precharge capacitor 0720, avoiding damage to relay 0730 and other devices.
Still more preferably, a MOS tube 0750 is further disposed between the negative electrode of the load unit 0200 and the negative electrode of the capacitor 0720. The MOS tube 0750 is preferably an N-channel MOS tube, the source of which is connected to the negative electrode of the capacitor 0720, the drain is connected to the negative electrode of the load unit 0200, and the gate is connected to the control unit 0400.
When the interface terminal 0100 is initially connected with the battery to be tested, the relay 0730 is disconnected, the inductor 0710 is directly connected with the positive electrode of the battery to be tested through the diode 0740 and the PTC, and the capacitor 0720 is charged and the voltage is gradually increased.
When the voltage of the capacitor 0720 is close to the voltage of the battery to be tested, the control unit 0400 sends a control signal to the relay 0730 to enable the relay 0730 to be closed. At this time, the inductor 0710 is connected to the battery to be measured mainly through the relay 0730, and the capacitor 0720 keeps synchronous with the voltage of the battery to be measured and supplies power to the load unit 0200.
Meanwhile, the control unit 0400 outputs a PWM signal to the MOS tube 0750. The MOS tube 0750 controls the current of the path of the load unit 0200 according to the PWM signal, so that the current is kept constant, and constant current control of discharge current is realized.
Preferably, the load unit 0200 is connected with a heat radiating unit for radiating heat of the load unit 0200. Specifically, the heat dissipating unit may be in the form of a heat dissipating fan, a heat dissipating fin, or the like, to timely dissipate heat to the external environment.
The detecting unit 0300 is used for detecting the voltage and the discharge current of the battery to be detected, and transmitting the detected value to the control unit 0400, the storage unit 0500 and the output unit 0600.
Referring to fig. 5, preferably, the detection unit 0300 includes:
a voltage detector 0310 for detecting the voltage of the battery to be measured.
The current detector 0320 is used for detecting the discharge current of the battery to be tested. Specifically, the current detector 0320 is connected to the load cell 0200, and measures the discharge current by measuring the current of the load cell 0200.
A temperature detector 0330 for detecting the temperature of the battery discharge tester 1000. Specifically, the temperature detector 0330 may be in the form of a temperature probe, a thermistor, or the like, and is configured to prevent the battery discharge tester 1000 from overheating by mainly measuring the temperature of the MOS tube 0750 and the power supply unit 0800.
The control unit 0400 compares the detected discharge current value with a preset value, and adjusts the discharge current of the battery to be tested according to the comparison result.
Preferably, the control unit 0400 includes a voltage controller 0410, a current controller 0420, a temperature controller 0430:
the voltage controller 0410 is used for comparing the detection value of the voltage detector 0310 with the lower limit value of the discharge voltage, and adjusting the discharge state of the battery to be tested according to the comparison result.
Specifically, when the detection value of the voltage detector 0310 is smaller than the lower limit value of the discharge voltage, which indicates that the voltage of the battery to be tested is insufficient, the control unit 0400 controls the discharge loop to be kept open, so as to prevent over-discharge damage to the battery to be tested.
The current controller 0420 is used for comparing the detection value of the current detector 0320 with a preset discharge current value, and adjusting the discharge current of the battery to be tested according to the comparison result.
Specifically, the control unit 0400 controls the current of the load unit 0200 to be constant through the MOS tube 0750 according to the detection value of the current detector 0320, thereby keeping the discharge current of the battery to be measured constant.
The temperature controller 0430 is used for comparing the detection value of the temperature detector 0330 with a temperature threshold value, and adjusting the discharge state of the battery to be detected according to the comparison result.
Specifically, when the detection value of the temperature detector 0330 is greater than the temperature threshold value, it is indicated that the battery discharge tester 1000 is already in an overheat dangerous state. Thus, the temperature controller 0430 cuts off the discharge circuit of the battery to be measured, so that the battery discharge tester 1000 can rest and cool down.
The storage unit 0500 is used for storing test data of the detection unit 0300 for subsequent inspection and maintenance.
Preferably, the memory unit 0500 includes an EEPROM. EEPROM (Electrically Erasable Programmable Read-Only Memory), which is an electrically erasable programmable read-Only Memory, is a Memory chip which does not lose data after power failure.
When the battery discharge tester 1000 is powered down, the EEPROM records the current last recorded parameters immediately for direct checking after the next re-energizing. Therefore, the battery discharge tester 1000 can realize a power-down memory function and reduce accidental damage caused by power failure.
The output unit 0600 is used for outputting the test data of the detection unit 0300, and may also include other parameters of the battery discharge tester 1000.
Specifically, the output unit 0600 may be a display screen, and is used for displaying the test data of the detection unit 0300 externally, so that the user can view and adjust instantly.
The battery discharge tester 1000 further includes an operation unit for a user to input an adjustment instruction to the battery discharge tester 1000.
Specifically, the operation unit may be in the form of a button, a knob, or the like, and is provided on the surface of the closed casing, further improving the operation convenience.
The battery discharge tester 1000 further includes an alarm unit 0900 for alarming or prompting, and the alarm unit 0900 may be in the form of a buzzer, an LED lamp, an audible and visual alarm, etc.
Specifically, when the detection data of the detection unit 0300 exceeds the alarm threshold, the control unit 0400 sends an alarm signal to the alarm unit 0900, so that the alarm unit 0900 sends alarm information such as sound and light to draw the attention of the user.
In conclusion, the battery discharge tester 1000 is manufactured by adopting common components, has a simple composition structure, and is low in cost and easy to manufacture.
Any particular values in all examples shown and described herein are to be construed as merely illustrative and not a limitation, and thus other examples of exemplary embodiments may have different values.
It should be noted that: like reference numerals and letters denote like items in the following figures, and thus once an item is defined in one figure, no further definition or explanation thereof is necessary in the following figures.
The above examples merely represent a few embodiments of the present invention, which are described in more detail and are not to be construed as limiting the scope of the present invention. It should be noted that it will be apparent to those skilled in the art that several variations and modifications can be made without departing from the spirit of the invention, which are all within the scope of the invention. Accordingly, the scope of the invention should be assessed as that of the appended claims.
Claims (8)
1. The battery discharge tester is characterized by comprising an interface end, a load unit, a detection unit, a control unit, a storage unit and an output unit:
the interface end is used for being connected with the anode and the cathode of the battery to be tested;
the load unit is used for consuming the electric energy of the battery to be tested;
the detection unit is used for detecting the voltage and the discharge current of the battery to be detected and transmitting detection values to the control unit, the storage unit and the output unit;
the control unit compares the discharge current detection value with a preset value, and adjusts the discharge state of the battery to be tested according to the comparison result;
the storage unit is used for storing the test data of the detection unit and comprises an EEPROM;
the output unit is used for outputting the test data of the detection unit;
an LC energy storage unit is arranged between the load unit and the battery to be tested, and is used for storing the discharge energy of the battery to be tested and discharging the discharge energy to the load unit;
the LC energy storage unit comprises an inductor and a capacitor, wherein the inductor is connected in series between the positive electrode of the battery to be detected and the capacitor, the other end of the capacitor is connected with the negative electrode of the battery to be detected, two ends of the capacitor are respectively connected with two ends of the load unit, a relay, a positive temperature coefficient thermistor and a diode are further arranged between the inductor and the positive electrode of the battery to be detected, the positive electrode of the diode is connected with the positive electrode of the battery to be detected, the negative electrode of the diode is connected with one end of the positive temperature coefficient thermistor, the input end of the relay is connected with the positive electrode of the diode, and the output end of the relay is connected with the other end of the positive temperature coefficient thermistor.
2. The battery discharge tester according to claim 1, wherein the detection unit includes:
a voltage detector for detecting the voltage of the battery to be tested;
a current detector for detecting a discharge current of the battery to be measured;
and the temperature detector is used for detecting the temperature of the battery discharge tester.
3. The battery discharge tester of claim 2 wherein the control unit comprises a voltage controller, a current controller, a temperature controller:
the voltage controller is used for comparing the detection value of the voltage detector with the lower limit value of the discharge voltage, and adjusting the discharge state of the battery to be tested according to the comparison result;
the current controller is used for comparing the detection value of the current detector with a preset discharge current value, and adjusting the discharge current of the battery to be tested according to the comparison result;
and the temperature controller is used for comparing the detection value of the temperature detector with a temperature threshold value, and adjusting the discharge state of the battery to be detected according to the comparison result.
4. The battery discharge tester of claim 1 further comprising a power supply unit for providing a constant operating voltage to the battery discharge tester.
5. The battery discharge tester of claim 1 further comprising an operation unit for a user to input an adjustment instruction to the battery discharge tester.
6. The battery discharge tester of claim 1 wherein the load cell comprises a resistor.
7. The battery discharge tester according to claim 1, wherein the load unit is connected with a heat radiating unit for radiating heat from the load unit.
8. The battery discharge tester of claim 1 further comprising an alarm unit for alerting or prompting.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710041615.2A CN106646264B (en) | 2017-01-20 | 2017-01-20 | Battery discharge tester |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710041615.2A CN106646264B (en) | 2017-01-20 | 2017-01-20 | Battery discharge tester |
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| CN106646264A CN106646264A (en) | 2017-05-10 |
| CN106646264B true CN106646264B (en) | 2024-03-22 |
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| CN201710041615.2A Active CN106646264B (en) | 2017-01-20 | 2017-01-20 | Battery discharge tester |
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Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109189616A (en) * | 2018-07-26 | 2019-01-11 | 上海与德通讯技术有限公司 | A kind of discharge test method and terminal to be measured |
| CN109669141A (en) * | 2018-12-18 | 2019-04-23 | 成都纵横大鹏无人机科技有限公司 | A kind of discharge test method, device and equipment |
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| CN201797341U (en) * | 2010-09-01 | 2011-04-13 | 张爱民 | Discharge output circuit device for vanadium cell |
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| CN206400077U (en) * | 2017-01-20 | 2017-08-11 | 深圳市木村机电有限公司 | battery discharge tester |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102010061537A1 (en) * | 2010-12-23 | 2012-06-28 | Sma Solar Technology Ag | Safety discharge device for an electrical storage element |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1182222A (en) * | 1996-09-03 | 1998-05-20 | 三洋电机株式会社 | Electronic camera and battery voltage controlling method employed therein |
| CN201797341U (en) * | 2010-09-01 | 2011-04-13 | 张爱民 | Discharge output circuit device for vanadium cell |
| CN102842937A (en) * | 2012-09-27 | 2012-12-26 | 苏州市曦煜光电有限公司 | Charging/discharging controlling system of serial storage battery set and charging/discharging optimizing method |
| CN103033760A (en) * | 2012-12-15 | 2013-04-10 | 安徽工程大学 | Battery charging and discharging tester |
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| CN206400077U (en) * | 2017-01-20 | 2017-08-11 | 深圳市木村机电有限公司 | battery discharge tester |
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| CN106646264A (en) | 2017-05-10 |
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