CN112599930A - Marine battery module and detection method for voltage and temperature of single battery cell of marine battery module - Google Patents
Marine battery module and detection method for voltage and temperature of single battery cell of marine battery module Download PDFInfo
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- 238000001514 detection method Methods 0.000 title abstract description 15
- 229910052782 aluminium Inorganic materials 0.000 claims abstract description 45
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims abstract description 45
- 238000000034 method Methods 0.000 claims abstract description 8
- 238000012360 testing method Methods 0.000 description 12
- 239000000178 monomer Substances 0.000 description 9
- 230000017525 heat dissipation Effects 0.000 description 4
- GELKBWJHTRAYNV-UHFFFAOYSA-K lithium iron phosphate Chemical compound [Li+].[Fe+2].[O-]P([O-])([O-])=O GELKBWJHTRAYNV-UHFFFAOYSA-K 0.000 description 4
- 238000005070 sampling Methods 0.000 description 4
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 3
- 239000004411 aluminium Substances 0.000 description 3
- 230000002238 attenuated effect Effects 0.000 description 3
- 229910052802 copper Inorganic materials 0.000 description 3
- 239000010949 copper Substances 0.000 description 3
- 230000005611 electricity Effects 0.000 description 3
- 238000005259 measurement Methods 0.000 description 3
- 229910052751 metal Inorganic materials 0.000 description 3
- 239000002184 metal Substances 0.000 description 3
- 230000002159 abnormal effect Effects 0.000 description 2
- 239000002253 acid Substances 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 238000007599 discharging Methods 0.000 description 2
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- 238000012544 monitoring process Methods 0.000 description 2
- 238000012546 transfer Methods 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 238000003466 welding Methods 0.000 description 2
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 description 1
- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 description 1
- 208000012266 Needlestick injury Diseases 0.000 description 1
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- 229910052799 carbon Inorganic materials 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000009792 diffusion process Methods 0.000 description 1
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- 238000005516 engineering process Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000004880 explosion Methods 0.000 description 1
- 230000004927 fusion Effects 0.000 description 1
- 229910052744 lithium Inorganic materials 0.000 description 1
- 229910001416 lithium ion Inorganic materials 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
- H01M10/4207—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells for several batteries or cells simultaneously or sequentially
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
- H01M10/48—Accumulators combined with arrangements for measuring, testing or indicating the condition of cells, e.g. the level or density of the electrolyte
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
- H01M10/48—Accumulators combined with arrangements for measuring, testing or indicating the condition of cells, e.g. the level or density of the electrolyte
- H01M10/486—Accumulators combined with arrangements for measuring, testing or indicating the condition of cells, e.g. the level or density of the electrolyte for measuring temperature
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
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- Secondary Cells (AREA)
Abstract
The invention belongs to the field of detection of marine batteries, and particularly relates to a marine battery module and a method for detecting voltage and temperature of a single battery cell of the marine battery module. The battery module includes: the battery pack comprises a first module and a second module which are connected in series, wherein the first module comprises a first battery pack, a second battery pack and a third battery pack which are connected through an aluminum plate, the first battery pack is provided with a plurality of battery cells, and the battery cells are connected in parallel; and the second battery pack and the third battery pack are internally provided with the same number of electric cores connected in parallel as the first battery pack. Based on the battery module, each single battery cell is measured only by measuring the voltage and the temperature of the aluminum plate on the positive electrode and the negative electrode of the first battery pack. The invention has the advantages that the cost for measuring voltage and temperature can be greatly reduced, and the problem that the temperature of a high-capacity multi-cell battery module is difficult to detect is solved.
Description
Technical Field
The invention belongs to the field of detection of marine batteries, and particularly relates to a marine battery module and a method for detecting voltage and temperature of a single battery cell of the marine battery module.
Background
With the social progress and the industrial development, the environmental protection pressure is more and more severe. In order to recover green water of the green hills, realize sustainable development and respond to the national strategy for developing green, low-carbon, energy-saving and emission-reducing energy sources. The electric drive of the ship and the new energy ship are used as the emerging industrial directions, firstly, strategic cooperation is carried out on the Yangtze river channel, the pure battery propulsion channel cruise ship project is developed for cooperation, the green Yangtze river channel construction is jointly dedicated, and the pure electromotion of the Yangtze river channel business, passenger transport and touring ships is jointly promoted.
The pure electric channel cruise boat is basically the same as a conventional mother ship, and the biggest difference is that the whole boat is powered by a battery, the battery is composed of a large-capacity multi-cell lithium iron phosphate power battery pack, and the conventional diesel engine is replaced by electric propulsion. The lithium battery is developed fast in the fields of passenger cars, energy storage, aviation and the like, the ship-level specification of China is lagged compared with the results of Europe, America and the like, and only lead-acid batteries and lithium iron phosphate batteries are allowed to be used as ship power batteries at present. Lead-acid batteries are not highly popularized due to low energy density; the lithium iron phosphate is relatively good in stability, energy density and economy when used as a ship power supply.
The ship is different from a passenger car, and accidents easily occur when the ship floats and parks randomly along with surge and water flow after losing power. Very strict standards are internationally set for the safety guarantee of lithium ion power batteries. The cell should not be subject to fire or explosion under conditions of disconnection, overcharge, needle stick, flat impact, etc. The ship-level specification has quite strict requirements on the product certification of the power battery shipment. The standard requires that power battery group must detect battery monomer, the charge-discharge process of battery module, branch road current, series parameters such as electric core level temperature, electric core level voltage, because marine group battery electric core is huge in quantity, if carry out electric core level and detect must every electric core and all arrange corresponding temperature, voltage detection sensor, it is big to detect the degree of difficulty, with high costs, BMS data processing volume is big.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provides a voltage and temperature equivalent detection method for a marine multi-cell iron phosphate lithium battery.
In order to achieve the purpose, the invention provides the following technical scheme:
a battery module for a ship, the battery module comprising: the device comprises a first module and a second module, wherein the first module and the second module are connected in series;
the first module comprises a first battery pack, a second battery pack and a third battery pack, wherein the first battery pack is provided with a plurality of battery cells, and the battery cells are in a parallel connection state; the second battery pack and the third battery pack are internally provided with electric cores which are connected in parallel and have the same number as that of the first battery pack;
the positive electrodes and the negative electrodes of a plurality of battery cells in the first battery pack are respectively connected and fixed through an aluminum plate;
the cathodes of the plurality of battery cells in the second battery pack are connected with the cathodes of the plurality of battery cells in the first battery pack through aluminum plates, the anodes of the plurality of battery cells in the second battery pack are connected with the anodes of the plurality of battery cells in the third battery pack through aluminum plates, and the cathodes of the plurality of battery cells in the third battery pack are fixedly connected through aluminum plates;
the structure that sets up of electric core is the same with first module in the second module.
Further, the negative poles of a plurality of electric cores of the first battery pack of the second module and the negative poles of a plurality of electric cores of the third battery pack of the first module are connected through an aluminum plate.
Further, the number of the electric cores in the first battery pack, the second battery pack and the third battery pack is 8.
Further, the height of the battery module is the height of a single cell.
Further, the thickness of the aluminum plate was 3 mm.
Further, the battery cell is a cylindrical battery cell.
And further, the current collectors of the positive electrode and the negative electrode of the battery cell are welded through metal copper in the axial direction.
The invention also provides a detection method for measuring the voltage and the temperature of the single battery cell in the marine battery module, which comprises the following steps:
based on the voltage detection method for the single battery cell in the marine battery module, the voltages of the aluminum plates mounted on the positive electrode and the negative electrode of the plurality of battery cells in the first battery pack are measured, and the voltages are equivalent voltages of each single battery cell in the battery module.
Based on the temperature detection method for the single battery cell in the marine battery module, the temperature of the aluminum plates mounted on the positive electrode and the negative electrode of the plurality of battery cells in the first battery pack is measured, and the temperature is the equivalent temperature of each single battery cell in the battery module.
Compared with the prior art, the technical scheme provided by the invention has the following beneficial effects:
the positive electrode positive and negative electrode negative of the single battery cell are formed by connecting aluminum plates in parallel. The resistivity is very small, and the positive pole bus plate, the negative pole bus plate and the positive and negative poles can be regarded as equivalent potential bodies, so that the voltage of the parallel-connected battery cells is basically equal to that of the bus bar. The voltage of each electric core can be obtained by measuring the voltage of the aluminum bus plates of the parallel electric cores, so that the problem that the voltage of a high-capacity multi-electric-core battery module is difficult to detect is solved.
Because the battery cell in the battery module is a cylindrical battery cell, the axial heat conduction performance of the battery cell is relatively excellent, the axial heat dissipation is more prominent than that of the axial heat dissipation, the thermal resistance and the thermal capacity of the aluminum bus plate are smaller, the heat conducted from the geometric center of the battery cell to the aluminum bus plate can quickly reach the thermal balance, and the aluminum bus plates of the serial and parallel connection of the battery cell and the positive and negative electrodes can be regarded as isothermal surfaces. Therefore, the temperature of the single battery cell is actually measured by measuring the temperature of the aluminum plates of the positive electrode and the negative electrode of the battery pack. The temperature of each battery cell in the module can be measured by detecting the temperature of each battery cell string and the aluminum plate connected in parallel, so that the problem that the temperature of a high-capacity and multi-battery-cell battery module is difficult to detect is solved.
Drawings
Fig. 1 is a schematic view of a marine battery module according to the present invention.
Wherein: 1 is an aluminum plate; and 2 is a voltage detection point.
Detailed Description
The invention is described in further detail below with reference to the accompanying drawings:
referring to fig. 1, a battery module for a ship, the battery module comprising: the device comprises a first module and a second module, wherein the first module and the second module are connected in series;
the first module comprises a first battery pack, a second battery pack and a third battery pack, wherein the first battery pack is provided with a plurality of battery cells, and the battery cells are in a parallel connection state; the second battery pack and the third battery pack are internally provided with electric cores which are connected in parallel and have the same number as that of the first battery pack;
the positive electrodes and the negative electrodes of a plurality of battery cells in the first battery pack are respectively connected and fixed through an aluminum plate 1;
the cathodes of a plurality of cells in the second battery pack are connected with the cathodes of a plurality of cells in the first battery pack through an aluminum plate 1, the anodes of a plurality of cells in the second battery pack are connected with the anodes of a plurality of cells in the third battery pack through the aluminum plate 1, and the cathodes of a plurality of cells in the third battery pack are fixedly connected through the aluminum plate 1;
the structure that sets up of electric core is the same with first module in the second module.
Further, the negative poles of a plurality of electric cores of the first group battery of the second module and the negative poles of a plurality of electric cores of the third group battery of the first module are connected through aluminum plate 1.
Further, the number of the electric cores in the first battery pack, the second battery pack and the third battery pack is 8.
Specifically, the cells in the first battery pack, the second battery pack and the third battery pack are all 8P1S (S represents series connection, and P represents parallel connection), while the first module is 8P3S, as is the second module.
Further, the height of the battery module is the height of a single cell.
Further, the aluminum plate 1 had a thickness of 3 mm.
Further, the battery cell is a cylindrical battery cell.
Specifically, the current of the single battery cell is 28AH, the voltage is 3.2V, the large cylindrical full-lug technology is adopted, all current collectors of the positive electrode and the negative electrode of the battery cell are axially connected with the battery cell electrode by metal copper through laser welding, and the joint is provided with a safety flexible connecting strip. The connection between the batteries is integrated by laser fusion welding.
And further, the current collectors of the positive electrode and the negative electrode of the battery cell are welded through metal copper in the axial direction.
The invention also provides a detection method for measuring the voltage and the temperature of the single battery cell in the marine battery module, which comprises the following steps:
based on the voltage detection method for single battery cells in the marine battery module, the voltages of the aluminum plates 1 mounted on the positive electrodes and the negative electrodes of the multiple battery cells in the first battery pack are measured, and the voltages are equivalent voltages of each single battery cell in the battery module, and are shown as voltage detection points 2 in fig. 1.
Specifically, since the unit cells are arranged in the battery box in the order of the cell heights, the detection of the voltage of the unit cells is actually to measure the voltage of the positive and negative terminals of the 8P1S module (i.e., the first battery pack). The positive electrode positive and negative electrode negative of 8 monomer battery cores are formed by connecting 3mm aluminum plates 1 in parallel. The resistivity is very small, and the positive pole bus plate, the negative pole bus plate and the positive and negative poles can be regarded as equivalent potential bodies, so that the voltage of the parallel-connected battery cells is basically equal to that of the bus bar. Therefore, the voltage of each cell can be obtained by measuring the voltage of the aluminum bus plates of the cells connected in parallel.
The voltage of the single cell is measured by the multimeter by using the equivalent method, positive and negative meter pens of the multimeter are respectively connected with positive and negative bus plates of the 8P1S battery module, the voltage of the 8P1S module during 0.5C (100A) discharge is measured, and the experimental measurement values of the voltage of the 8P1S module terminal and the voltage of each cell are shown in Table 1.
TABLE 1 cell Voltage measurements
And (4) test conclusion:
in the 0.5C discharge state, the minimum cell voltage of 8P1S is 3.295V, the maximum cell voltage is 3.297V, the differential pressure is 2mV and is less than BMS sampling precision (5mV), so that the real voltage of each cell can be reflected by measuring the voltage of the positive and negative aluminum bus plates of the 8P1S module.
Based on the above method for detecting the temperature of the single battery cell in the marine battery module, the temperature of the aluminum plates 1 mounted on the positive electrode and the negative electrode of the plurality of battery cells in the first battery pack is measured, and the temperature is the equivalent temperature of each single battery cell in the battery module.
Specifically, the battery cell selected by the invention is a cylindrical battery cell, the axial heat conduction performance of the battery cell is relatively excellent, the axial heat dissipation is more prominent than that of the battery cell in the radial direction, the thermal resistance and the thermal capacity of the aluminum bus plate are small, the heat conducted from the geometric center of the battery cell to the aluminum bus plate can quickly reach the thermal balance, and the aluminum bus plates of the serial connection and parallel connection of the battery cell and the positive and negative electrodes can be regarded as isothermal surfaces. Therefore, the cell temperature is actually detected by measuring the temperature of the positive and negative electrode aluminum busbar plates 1 of the 8P1S module (i.e., the first battery pack). The temperature of each battery cell in the module can be measured by detecting the temperature of each battery cell string and the temperature of each parallel connection aluminum bus board.
Specifically, the temperature of the 8P1S module is measured by the temperature tester by the equivalent method, three temperature measuring points in the middle of the cylindrical shell of the single cell, namely the positive electrode bus plate, the negative electrode bus plate and the single cell, are selected, the probe is fixed on the temperature measuring points by an adhesive tape, the measurement is carried out by discharging at 0.5C at room temperature, a single cell is selected, and the short-circuit fault is manufactured by the short-circuit tester 20S after the test is started. Laying aside for 1h, recording each temperature measuring point and temperature change, wherein the recorded temperature change curve is shown in the figure.
(1) The short circuit is carried out 20 seconds after the timing is started, and as can be seen from the temperature recording curve, the temperature of the soft positive connection part (the positive pole post of the test monomer battery cell) of the short circuit test monomer battery cell rises fastest, and the positive pole bus plate explains that the heat of the short circuit test monomer battery cell is firstly conducted to the positive pole post of the monomer battery cell and then conducted to the positive pole bus plate. And the temperature of the single cell shell in the short circuit test is radial heat transfer, and the temperature rise is slow compared with the temperature rise of the first two temperature measuring points. Before 110 seconds (within 90 seconds after short circuit), the temperature of the positive electrode bus plate rises to be higher than the temperature of the single cell shell in the short circuit test.
(2) During the temperature rise of the single cell in the short circuit test (continuous analysis for 70 seconds), the temperature of the positive electrode bus plate rises from 25 ℃ to 110 ℃, and the temperature rise rate is 1.2 ℃/s.
(3) At timing 90 seconds time point, the short circuit discharge ends, and the inside heat production of short circuit test monomer electricity core stops, nevertheless because 8 electricity core anodes utilize the aluminium cylinder manifold to link together, and other 7 normal batteries of festival and negative pole cylinder manifold will continue to be conducted to the heat of anodal cylinder manifold, and normal monomer temperature and cylinder manifold temperature begin to rise. However, due to time change, heat is diffused in the air, and the temperature of the soft connection position of the positive electrodes of the single battery cells and the temperature of the positive electrode bus plate in the short-circuit test start to decrease.
(4) It can be seen from the temperature curve of record that positive pole cylinder manifold temperature change is faster than the temperature change of negative pole cylinder manifold and normal battery case, because the heat dissipation, when positive pole cylinder manifold temperature dropped, negative pole cylinder manifold and normal battery case's temperature still can continue to rise, slowly tends to steadily.
(5) Because each battery cell is provided with the plastic outer sleeve and has the heat preservation effect, the temperature of the shell of the single battery cell in the short circuit test is slowly reduced, so that the heat conduction between the positive electrode and the negative electrode of the battery cell is faster than the diffusion of the shell, and the temperature change of the battery cell can be equivalently detected by testing the temperature of the positive electrode collecting plate and the negative electrode collecting plate.
According to the invention, the 8P6S battery module is measured, three temperature measuring points are arranged on three negative bus plates at the temperature detecting points, four temperature measuring points are arranged on four positive bus plates, and 7 temperature measuring points are arranged on the whole 8P6S battery module. The BMS sampling period is 1s, the temperature abnormality of the single battery core caused by the fault can be judged within 5s through the temperature rise rate and the comparison with the temperatures of other batteries, and corresponding alarming and safety measures are taken; the monomer electricity core all arranges according to electric core height order, and 8P6S battery module only needs to set up 6 voltage monitoring points. The differential pressure is 2mV, which is less than the BMS sampling precision (5 mV); compared with 48 battery cores, the number of the single temperature monitoring points is 41, and the number of the voltage detecting points is 42. The whole system cost is saved by 30%, the volume is reduced by nearly 50%, and practical and applicable effects are achieved.
Detection and judgment principle of temperature and voltage under abnormal condition of battery cell
By means of the failure case of the vehicle-mounted battery of the passenger vehicle, the abnormal mode of the battery core in the battery module mainly comprises: the capacity of the single battery cell is weak, the inside of the single battery cell is open, the inside of the single battery cell is short-circuited, the inside of the single battery cell is overheated and the like.
(1) If one or more than one of the cells connected in parallel are seriously capacity-attenuated, the capacity of the cell connected in parallel is lower than that of other cells connected in parallel, and according to the characteristics of the dry battery, the cell is firstly saturated in the charging stage and is also firstly discharged in the discharging stage. Therefore, there will be a significant voltage difference at the terminal voltage compared to other cells. If the problem occurs, the battery management system BMS can easily judge that the capacity of the parallel battery cell is attenuated or opened, and carry out alarm prompt so as to confirm the position of the attenuated battery cell.
(2) If a cell in the parallel cells has an internal short circuit, the connection between the positive and negative electrodes is equivalent to the connection of a wire, potential difference does not exist between the positive and negative electrodes, the voltage at the parallel cell can instantly and quickly fall off, and because the sampling period reaction time of the BMS for detecting the voltage at the cell terminal is generally millisecond level, the voltage change of the parallel cell can be quickly detected, the internal short circuit of the parallel cell can be judged, and the control contactor for alarming and cutting off the cluster of direct current buses is protected.
(3) If individual electric core is because the electrical property worsens, results in inside a large amount of heats that produce, because the cylinder manifold heat-transfer property is better, the heat can conduct to the parallelly connected aluminium cylinder manifold of electric core rapidly, and this parallelly connected aluminium cylinder manifold of electric core temperature rises fast, will have obvious difference in temperature with other normal electric core temperatures, and BMS can judge this parallelly connected electric core temperature too high, reports to the police and cuts off control contactor and protect before taking place thermal runaway (electric core temperature reaches 130 ℃).
Claims (8)
1. A battery module for a ship, the battery module comprising: the device comprises a first module and a second module, wherein the first module and the second module are connected in series;
the first module comprises a first battery pack, a second battery pack and a third battery pack, wherein the first battery pack is provided with a plurality of battery cells, and the battery cells are in a parallel connection state; the second battery pack and the third battery pack are internally provided with electric cores which are connected in parallel and have the same number as that of the first battery pack;
the positive electrodes and the negative electrodes of a plurality of battery cells in the first battery pack are respectively connected and fixed through an aluminum plate;
the cathodes of the plurality of battery cells in the second battery pack are connected with the cathodes of the plurality of battery cells in the first battery pack through aluminum plates, the anodes of the plurality of battery cells in the second battery pack are connected with the anodes of the plurality of battery cells in the third battery pack through aluminum plates, and the cathodes of the plurality of battery cells in the third battery pack are fixedly connected through aluminum plates;
the structure that sets up of electric core is the same with first module in the second module.
2. The marine battery module of claim 1, wherein the negative electrodes of the cells of the first battery pack of the second module are connected to the negative electrodes of the cells of the third battery pack of the first module by an aluminum plate.
3. The marine battery module of claim 2, wherein the number of cells in the first battery pack, the second battery pack, and the third battery pack is 8.
4. The marine battery module of claim 1, wherein the height of the battery module is the height of a single cell.
5. The marine battery module of claim 1, wherein the cells are cylindrical cells.
6. The marine battery module of claim 4, wherein the aluminum plate has a thickness of 3 mm.
7. The method for detecting the voltage of the single cell in the marine battery module according to claim 1, wherein the voltage of the aluminum plates mounted on the positive electrode and the negative electrode of the plurality of cells in the first battery pack is measured, and the voltage is an equivalent voltage of each single cell in the battery module.
8. The method for detecting the temperature of the single battery cell in the marine battery module according to claim 1, wherein the temperature of the aluminum plates mounted on the positive electrode and the negative electrode of the plurality of battery cells in the first battery pack is measured, and the temperature is an equivalent temperature of each single battery cell in the battery module.
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| CN209266474U (en) * | 2019-01-21 | 2019-08-16 | 武汉船用电力推进装置研究所（中国船舶重工集团公司第七一二研究所） | A kind of high security lithium ion battery module peculiar to vessel |
| CN111628243A (en) * | 2020-05-27 | 2020-09-04 | 武汉船用电力推进装置研究所（中国船舶重工集团公司第七一二研究所） | Battery module structure |
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