CN117039345A - Battery module and control method thereof - Google Patents
Battery module and control method thereof Download PDFInfo
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- CN117039345A CN117039345A CN202311119147.8A CN202311119147A CN117039345A CN 117039345 A CN117039345 A CN 117039345A CN 202311119147 A CN202311119147 A CN 202311119147A CN 117039345 A CN117039345 A CN 117039345A
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- 238000000034 method Methods 0.000 title claims abstract description 30
- 238000007599 discharging Methods 0.000 claims description 30
- 238000001816 cooling Methods 0.000 claims description 11
- 238000001514 detection method Methods 0.000 claims description 11
- 239000007788 liquid Substances 0.000 claims description 11
- 230000002159 abnormal effect Effects 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000004146 energy storage Methods 0.000 description 2
- 230000010354 integration Effects 0.000 description 1
- 238000002955 isolation Methods 0.000 description 1
- 239000004065 semiconductor Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Classifications
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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
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/50—Current conducting connections for cells or batteries
- H01M50/502—Interconnectors for connecting terminals of adjacent batteries; Interconnectors for connecting cells outside a battery casing
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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
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/50—Current conducting connections for cells or batteries
- H01M50/502—Interconnectors for connecting terminals of adjacent batteries; Interconnectors for connecting cells outside a battery casing
- H01M50/503—Interconnectors for connecting terminals of adjacent batteries; Interconnectors for connecting cells outside a battery casing characterised by the shape of the interconnectors
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/50—Current conducting connections for cells or batteries
- H01M50/502—Interconnectors for connecting terminals of adjacent batteries; Interconnectors for connecting cells outside a battery casing
- H01M50/509—Interconnectors for connecting terminals of adjacent batteries; Interconnectors for connecting cells outside a battery casing characterised by the type of connection, e.g. mixed connections
- H01M50/51—Connection only in series
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- 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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- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
Abstract
The embodiment of the application provides a battery module and a control method thereof. The tee joint module is provided with a first contact, a second contact and a third contact. The second contact and the third contact of any tee module are respectively and electrically connected with the first electrode and the second electrode of a plurality of electric cores, the first contact is electrically connected with the first electrode or the second electrode of another electric core or the first total electrode of the battery module, and when the first contact and the third contact of all tee modules are conducted, all the electric cores and the first total electrode are sequentially connected in series. When the first contact and the second contact of any three-way module are conducted, the three-way module can short-circuit the corresponding battery core so as to isolate the battery core from the series circuit of the battery module. The problem that the battery module cannot be used due to a certain battery cell fault can be avoided, and the problem of thermal runaway can be improved.
Description
Technical Field
The application relates to the technical field of secondary batteries, in particular to a battery module and a control method thereof.
Background
With the continuous development of new energy industries, secondary batteries are being continuously used by various industries as energy storage units.
However, the existing battery module is formed by electrically connecting a plurality of battery cells in a fixed series-parallel connection mode, the output voltage of the battery module is relatively fixed, and after one or a plurality of battery cells in the battery module fail, the connection mode can cause that the whole battery module cannot work normally, the cost for replacing or maintaining the battery module is higher, and sometimes the battery cells fail in a fault mode can cause the whole battery module to generate thermal runaway to cause safety problems during operation.
Therefore, how to reduce the influence of failure of a single battery cell on the whole battery module and avoid thermal runaway of the battery module caused by failure of the battery cell is a problem to be solved in industry.
Disclosure of Invention
The present application has an object to provide a battery module and a control method of the battery module, which can avoid the problem that the battery module cannot be used due to failure of a certain battery cell in the battery module and can improve the problem of thermal runaway, for example.
Embodiments of the application may be implemented as follows:
in a first aspect, the application provides a battery module, which comprises a plurality of electric cores and a plurality of tee modules corresponding to the electric cores one by one;
the tee joint module is provided with a first contact, a second contact and a third contact;
the second contact and the third contact utilized by any three-way module are respectively and electrically connected with the first electrodes and the second electrodes of a plurality of electric cores, the first contact is electrically connected with the first electrode or the second electrode of the other electric core or the first total electrode of the battery module, and when the first contact and the third contact of all the three-way modules are conducted, all the electric cores and the first total electrodes are sequentially connected in series;
when the first contact and the second contact of any three-way module are conducted, the three-way module can short the corresponding electric core so as to isolate the electric core from a series circuit of the battery module.
In an alternative embodiment, the battery module further comprises a three-way module having a first connection point, a second connection point, and a third connection point;
the first connection point and the second connection point are respectively connected with the first electrode and the second electrode of one battery cell, and the third connection point is connected with a second total electrode of the battery module;
when the first connection point is conducted with the third connection point and the first connection points and the third connection points of all the tee joint modules are conducted, the first total electrode, all the battery cells and the second total electrode are sequentially connected in series;
when the first contact and the second contact of the tee module corresponding to the battery cell which is electrically connected with the tee module are conducted, the second connection point and the third connection point are conducted, so that the first total electrode, the other battery cells and the second total electrode can be sequentially connected in series.
In an alternative embodiment, the battery module further includes a plurality of detection sensors and a controller;
the detection sensors are arranged on the battery cores in a one-to-one correspondence manner so as to detect operation parameters corresponding to the battery cores, and the operation parameters represent the real-time operation state of the battery cores;
the tee joint module is also electrically connected with the controller;
the controller is used for controlling the tee joint module according to the operation parameters so as to enable the first contact to be conducted with the second contact or the third contact.
In an alternative embodiment, the battery module further comprises an energy release module;
the energy discharging module is connected with the positive electrode and the negative electrode of the battery core and is connected with the controller;
the controller is used for controlling the operation of the energy discharging module according to the operation parameters so as to discharge the communicated battery cells.
In an optional embodiment, the energy discharging module includes a plurality of energy discharging modules, the plurality of energy discharging modules are connected to the anodes and cathodes of the plurality of electric cores in a one-to-one correspondence manner, and are connected to the controller, and the controller is used for controlling the energy discharging modules corresponding to the operation parameters to operate according to the operation parameters.
In an alternative embodiment, the detection sensor includes a temperature sensor and a voltage sensor, and each of the battery cells is provided with the temperature sensor and the voltage sensor.
In a second aspect, the present application provides a control method of a battery module for use in the control of the battery module according to any one of the foregoing embodiments, the method comprising;
acquiring operation parameters of all the battery cells, wherein the operation parameters comprise operation voltage and/or operation temperature;
judging whether the operation parameters are in a preset range or not;
if the operation parameters are not in the preset range, the battery cell is marked as a fault battery cell, the first contact and the second contact of the tee module corresponding to the fault battery cell are controlled to be conducted, and the first contact and the third contact of other tee modules are controlled to be conducted, so that the fault battery cell is isolated from a series circuit system of the battery module.
In an alternative embodiment, the battery module further comprises a three-way module having a first connection point, a second connection point, and a third connection point;
the first connection point and the second connection point are respectively connected with the first electrode and the second electrode of one battery cell, and the third connection point is connected with a second total electrode of the battery module;
when the first connection point is conducted with the third connection point and the first connection points and the third connection points of all the tee joint modules are conducted, the first total electrode, all the battery cells and the second total electrode are sequentially connected in series;
when the first contact and the second contact of the tee module corresponding to the tee module electrically connected with the battery core are conducted, the second connection point and the third connection point are conducted, so that the first total electrode, other battery cores and the second total electrode can be sequentially connected in series;
the control method further includes;
judging whether the fault battery cell is the battery cell electrically connected with the tee joint module;
if the fault battery cell is electrically connected with the three-way module, controlling the second connection point to be conducted with the third connection point;
and if the fault battery cell is not the battery cell electrically connected with the tee joint module, controlling the first connection point to be conducted with the third connection point.
In an alternative embodiment, the battery module further comprises a liquid cooling plate for cooling the battery cells;
the operating parameters include cell temperature;
the method further comprises;
acquiring the operation temperature of the fault battery cell;
judging whether the operation temperature of the fault battery cell is higher than a preset temperature;
and if the operating temperature of the battery cell is higher than the preset temperature, controlling the liquid cooling plate to operate so as to cool the fault battery cell.
In an alternative embodiment, the battery module further comprises an energy release module;
the energy discharging module is connected with the positive electrode and the negative electrode of the battery cell and is connected with the controller;
the controller is used for controlling the operation of the energy release module according to the operation parameters so as to discharge the communicated battery cells;
the operating parameters further include an operating voltage;
the method further comprises;
judging whether the operation voltage exceeds the maximum value of a preset voltage range and the temperature of the battery cell is smaller than the preset temperature or not;
and if the voltage of the battery cell exceeds the preset voltage and the temperature of the battery cell is smaller than the preset temperature, controlling the energy discharging module communicated with the fault battery cell to operate until the voltage of the fault battery cell is smaller than the preset voltage and controlling the energy discharging module communicated with the fault battery cell to stop operating.
The battery module and the control method thereof provided by the embodiment of the application have the beneficial effects that:
according to the application, the tee joint module is correspondingly arranged for each electric core, and the electric cores are connected in series through the tee joint module, so that when one electric core fails or fails, the conduction state of the tee joint module corresponding to the electric core can be switched, the failed electric core can be isolated from the series circuit of the battery module, and the battery module can also form a complete passage without influencing the use of the battery module. The isolated battery core liquid can not participate in the discharging or charging process of the battery module, so that the risk of thermal runaway of the battery module can be reduced. And secondly, under the condition that the battery module is normal, the number of the electric cores forming the series circuit in the battery module can be selected according to the user requirement, and the unnecessary electric cores are isolated from the series circuit of the battery module, so that the output voltage of the battery module can be adjusted, and the multipurpose use of the battery module is realized.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present application, 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 application 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 a schematic diagram of circuit connection of a battery module according to an embodiment of the present application;
fig. 2 is a schematic circuit connection diagram of another battery module according to an embodiment of the present application;
fig. 3 is a flowchart illustrating a control method of a battery module according to an embodiment of the present application;
fig. 4 is a flowchart illustrating a control method of a battery module according to an embodiment of the present application.
Icon: 100-battery module; 110-cell; 130-a tee module; 131-a first contact; 133-a second contact; 135-third contact; 150-a tee joint module; 151-a first connection point; 153-a second connection point; 155-a third connection point; 171-a second total electrode; 173-a first total electrode; 180-an energy release module; 190-liquid cooling plate.
Detailed Description
For the purpose of making the objects, technical solutions and advantages of the embodiments of the present application more apparent, the technical solutions of the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present application, and it is apparent that the described embodiments are some embodiments of the present application, but not all embodiments of the present application. The components of the embodiments of the present application generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.
Thus, the following detailed description of the embodiments of the application, as presented in the figures, is not intended to limit the scope of the application, as claimed, but is merely representative of selected embodiments of the application. All other embodiments, which can be made by those skilled in the art based on the embodiments of the application without making any inventive effort, are intended to be within the scope of the application.
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.
In the description of the present application, it should be noted that, if the terms "upper", "lower", "inner", "outer", and the like indicate an azimuth or a positional relationship based on the azimuth or the positional relationship shown in the drawings, or the azimuth or the positional relationship in which the inventive product is conventionally put in use, it is merely for convenience of describing the present application and simplifying the description, and it is not indicated or implied that the apparatus or element referred to must have a specific azimuth, be configured and operated in a specific azimuth, and thus it should not be construed as limiting the present application.
Furthermore, the terms "first," "second," and the like, if any, are used merely for distinguishing between descriptions and not for indicating or implying a relative importance.
It should be noted that the features of the embodiments of the present application may be combined with each other without conflict.
Examples
Referring to fig. 1 and 2, the present embodiment provides a battery module 100, where the battery module 100 can be used as a power source of a new energy automobile, and also used for preparing energy storage equipment or used as a mobile power source to supply power to electric equipment.
In this embodiment, the battery module 100 includes a plurality of battery cells 110 and a plurality of three-way modules 130 corresponding to the battery cells 110 one by one. The three-way module 130 has a first contact 131, a second contact 133, and a third contact 135. The second contact 133 and the third contact 135 of any three-way module 130 are electrically connected to the first electrode and the second electrode of the plurality of cells 110, respectively, the first contact 131 is electrically connected to the first electrode or the second electrode of another cell 110 or the first total electrode 173 of the battery module 100, and when the first contacts 131 and the third contacts 135 of all three-way modules 130 are turned on, all the cells 110 and the first total electrode 173 are sequentially connected in series. When the first contact 131 and the second contact 133 of any three-way module 130 are connected, the three-way module 130 can short-circuit the corresponding battery cell 110 to isolate the battery cell from the serial circuit of the battery module 100.
In this embodiment, the tee module 130 is correspondingly disposed for each battery cell 110, and the plurality of battery cells 110 are connected in series through the tee module 130, so that when one or more battery cells 110 fail or fail, the conduction state of the tee module 130 corresponding to the battery cell 110 can be switched, so that the failed battery cell 110 can be isolated from the series circuit of the battery module 100, and thus the battery module 100 can also form a complete path without affecting the use of the battery module 100. The isolated battery cell 110 liquid does not participate in the discharging or charging process of the battery module 100, so that the risk of thermal runaway of the battery module 100 can be reduced. Secondly, under the condition that the battery module 100 is normal, the number of the battery cells 110 forming the series circuit in the battery module 100 can be selected according to the user requirement, and the unnecessary battery cells 110 are isolated from the series circuit of the battery module 100, so that the output voltage of the battery module 100 can be adjusted, and the multipurpose use of the battery module 100 is realized.
One of the first electrode and the second electrode is a positive electrode of the battery cell 110, and the other is a negative electrode of the battery cell 110. The first total electrode 173 may be the total positive electrode or the total negative electrode of the battery module 100.
Referring to fig. 1 and 2, in the present embodiment, in order to ensure that the position of the second total electrode 171 of the battery module 100 is unchanged in any state, in the present embodiment, the battery module 100 further includes a three-way module 150, and the three-way module 150 has a first connection point 151, a second connection point 153, and a third connection point 155. The first and second connection points 151 and 153 are connected to the first and second electrodes of one battery cell 110, respectively, and the third connection point 155 is connected to the second total electrode 171 of the battery module 100. When the first connection point 151 is conducted with the third connection point 155 and the first connection points 131 and the third connection points 135 of all the three-way modules 130 are conducted, the first total electrodes 173, all the battery cells 110 and the second total electrodes 171 are sequentially connected in series. When the first contact 131 and the second contact 133 of the three-way module 130 corresponding to the battery cell 110 electrically connected to the three-way module 150 are turned on, the second connection point 153 and the third connection point 155 are turned on, so that the first total electrode 173, the other battery cells 110 and the second total electrode 171 can be sequentially connected in series.
The three-way module 150 is provided in this embodiment, so that when the battery cell 110 connected to the second total electrode 171 is isolated, it can be ensured that the second total electrode 171 also corresponds to the electrode of the corresponding serial circuit of the battery module 100, and the connection between the second total electrode 171 and the battery cell 110 does not need to be changed, so that a more scheme is used.
To facilitate understanding of the technical solution of the present embodiment, the present embodiment is described by taking the battery module 100 having six battery cells 110 as an example:
referring to fig. 1, specifically, the six electric cells 110 are numbered 1, 2, 3, 4, 5 and 6, and the six tee modules 130 corresponding to each other are numbered A, B, C, D, E and F. The second contact 133 of the three-way module 130 is connected to the positive electrode of the corresponding No. 1 cell 110, the third contact 135 is connected to the negative electrode of the No. 1 cell 110, and the first contact 131 is connected to the total negative electrode of the battery module 100. The second contact 133 of the three-way module 130 is connected to the positive electrode of the No. 2 cell 110 corresponding to the second contact, the third contact 135 is connected to the negative electrode of the No. 2 cell 110, and the first contact 131 is connected to the positive electrode of the No. 1 cell 110. The second contact 133 of the three-way module 130 is connected to the positive electrode of the No. 3 cell 110 corresponding to the second contact 133, the third contact 135 is connected to the negative electrode of the No. 3 cell 110, and the first contact 131 is connected to the positive electrode of the No. 2 cell 110. The second contact 133 of the three-way module 130 is connected to the positive electrode of the No. 4 cell 110 corresponding to the second contact, the third contact 135 is connected to the negative electrode of the No. 4 cell 110, and the first contact 131 is connected to the positive electrode of the No. 3 cell 110. The second contact 133 of the three-way module 130 is connected to the positive electrode of the No. 5 cell 110 corresponding to the second contact, the third contact 135 is connected to the negative electrode of the No. 5 cell 110, and the first contact 131 is connected to the positive electrode of the No. 4 cell 110. The second contact 133 of the three-way module 130 is connected to the positive electrode of the corresponding No. 6 cell 110, the third contact 135 is connected to the negative electrode of the No. 6 cell 110, and the first contact 131 is connected to the positive electrode of the No. 5 cell 110. The first connection point 151 of the three-way module 150 is conducted with the positive electrode of the No. 6 cell 110, the second connection point 153 is conducted with the negative electrode of the No. 6 cell 110, and the third connection point 155 is conducted with the total positive electrode of the battery module 100. Thus, when all the first and second contacts 131 and 133 of the three-way module 130 are turned on and the first and third connection points 151 and 155 of the three-way module 150 are turned on, all the cells 110 are connected in series between the total negative and positive electrodes.
In this embodiment, the first contact 131 is connected to the positive electrode of the next cell 110 or the total negative electrode of the battery module 100.
For example, when the No. 2 cell 110 needs to be isolated, the first contact 131 of the tee module 130 corresponding to the No. 2 cell 110 needs to be switched to be conductive with the third contact 135. When the number 6 battery cell 110 needs to be isolated, the first contact 131 of the three-way module 130 needs to be switched to be conducted with the third contact 135, and the second connection point 153 of the three-way module 150 is conducted with the third connection point 155 to isolate the number 6 battery cell 110, and the total positive electrode and the total negative electrode of the battery module 100 are not affected.
Of course, in other embodiments of the present application, the wiring of the tee module 130 and the tee module may be adjusted to achieve the above functions. Referring specifically to fig. 2, the principle is the same as that of the above embodiment, and the description of this embodiment is omitted.
In this embodiment, the battery module 100 further includes a plurality of detection sensors and a controller, where the plurality of detection sensors are installed on the plurality of electric cells 110 in a one-to-one correspondence manner, so as to detect the operation parameters of the corresponding electric cells 110, and the operation parameters characterize the real-time operation state of the electric cells 110. The tee module 130 is also electrically connected to the controller. The controller is used for controlling the three-way module 130 according to the operation parameter so as to conduct the first contact 131 with the second contact 133 or the third contact 135.
The control of the three-way module 130 is realized by using the detection sensor in the embodiment, so that when the operating parameters such as voltage, temperature and the like of the battery cell 110 are no longer in a preset range, the automatic isolation of the battery cell 110 can be realized, and the operation is more convenient.
In this embodiment, the controller is further electrically connected to the three-way module 150, and can control the third connection point 155 of the three-way module 150 to be selectively connected to the first connection point 151 or the second connection point 153.
In this embodiment, the tee module 130 and the tee module 150 may be relays, which can be selectively turned on by the high and low levels input by the controller. Thus, the control is more convenient, and the integration level is high.
Referring to fig. 1 and 2, in the present embodiment, the battery module 100 further includes an energy release module 180. The energy discharging module 180 is connected with the positive electrode and the negative electrode of the battery cell 110 and is connected with the controller. The controller is used for controlling the operation of the energy discharging module 180 according to the operation parameters so as to discharge the connected battery cells 110.
The present embodiment can release the electrical energy stored in the specific battery cell 110 by providing the energy release module 180, for example, so that the problem of thermal runaway can be avoided when the battery cell 110 is abnormal.
In this embodiment, the energy discharging module 180 includes a plurality of energy discharging modules 180, and the plurality of energy discharging modules 180 are connected to the positive electrodes and the negative electrodes of the plurality of electric cores 110 in a one-to-one correspondence manner, and are connected to a controller, and the controller is configured to control the energy discharging module 180 corresponding to the operation parameters to operate according to the operation parameters.
Of course, in other embodiments of the present application, the battery cells 110 in the entire battery module 100 may share one energy release module 180, and be connected to all the battery cells 110 through a switch circuit.
In this embodiment, the energy discharging module 180 is connected to a controller, and the controller can control the operation of the energy discharging module 180.
It should be noted that, the energy discharging module 180 may be a low-power electric device, which can convert electric energy into internal energy, mechanical energy, and the like. For example, the energy discharging module 180 may be a semiconductor refrigerating plate, which can convert the electric energy of the battery cell 110 into internal energy to cool the battery cell 110.
In the present embodiment, the detection sensors include a temperature sensor (not shown) and a voltage sensor (not shown), and each of the battery cells 110 is provided with the temperature sensor and the voltage sensor.
Referring to fig. 1 and 2, in the present embodiment, the battery module 100 further includes a liquid cooling plate 190 for cooling the battery cell 110, where the liquid cooling plate 190 is disposed between the positive electrode and the negative electrode of the battery cell 110, and can cool the battery cell 110 through a heat exchange medium.
Referring to fig. 3, next, the present embodiment further provides a control method of the battery module 100, for controlling the battery module 100 of the foregoing embodiment, including;
s1, acquiring operation parameters of all the battery cells 110, wherein the operation parameters comprise operation voltage and/or operation temperature;
in this embodiment, the operating parameters are detected by the detection sensor.
S2, judging whether the operation parameters are in a preset range or not;
it should be noted that the preset range is determined according to parameters of the battery cell 110, the use environment, and the like.
And S3, if the operation parameter is not in the preset range, marking the battery cell 110 corresponding to the operation parameter as a fault battery cell 110, controlling the first contact 131 and the second contact 133 of the tee module 130 corresponding to the fault battery cell 110 to be conducted, and enabling the first contact 131 and the third contact 135 of the other tee module 130 to be conducted so as to isolate the fault battery cell 110 from the series circuit system of the battery module 100.
And S4, if all the operation parameters are within the preset range, controlling the first contact 131 and the third contact 135 of all the three-way modules 130 to be conducted.
The control method also comprises the following steps;
s5, judging whether the fault battery cell 110 is the battery cell 110 electrically connected with the tee joint module 150;
s6, if the fault cell 110 is the cell 110 electrically connected with the tee module 150, controlling the second connection point 153 and the third connection point 155 of the tee module 150 to be conducted;
s7, if the failed cell 110 is not the cell 110 electrically connected to the three-way module 150, the first connection point 151 and the third connection point 155 of the three-way module 150 are controlled to be conducted.
Referring to fig. 4, in the present embodiment, the operation parameters include the temperature of the battery cell 110;
the method also comprises the following steps;
s8, acquiring the operation temperature of the fault battery cell 110;
s9, judging whether the operation temperature of the fault battery cell 110 is greater than a preset temperature;
s10, if the operation temperature of the battery cell 110 is greater than the preset temperature, the liquid cooling plate 190 is controlled to operate so as to cool down the fault battery cell 110.
In this embodiment, the operating parameters further include an operating voltage;
the method also comprises the following steps;
s11, acquiring the operation voltage of the fault battery cell 110;
s12, judging whether the operation voltage exceeds the maximum value of a preset voltage range and the temperature of the battery cell 110 is smaller than the preset temperature or not;
and S13, if the voltage of the battery cell 110 exceeds the preset voltage and the temperature of the battery cell 110 is less than the preset temperature, controlling the operation of the energy discharging module 180 communicated with the fault battery cell 110 until the voltage of the fault battery cell 110 is less than the preset voltage and controlling the operation of the energy discharging module 180 communicated with the fault battery cell 110 to stop.
According to the embodiment, the battery cells 110 with abnormal operation can be isolated from the series circuit of the battery module 100 by the control method, the battery cells 110 with abnormal operation can be cooled, and the battery cells 110 with higher voltage can be discharged after the temperature is reduced, so that thermal runaway of the battery cells 110 can be effectively avoided.
In summary, the working principle and beneficial effects of the battery module 100 and the control method of the battery module 100 provided in this embodiment include:
in this embodiment, the tee module 130 is correspondingly disposed for each cell 110, and the multiple cells 110 are connected in series through the tee module 130, so that when one of the cells 110 fails or fails, the conduction state of the tee module 130 corresponding to the cell 110 can be switched, so that the failed cell 110 can be isolated from the series circuit of the battery module 100, and thus the battery module 100 can form a complete path without affecting the use of the battery module 100. The isolated battery cell 110 liquid does not participate in the discharging or charging process of the battery module 100, so that the risk of thermal runaway of the battery module 100 can be reduced. Secondly, under the condition that the battery module 100 is normal, the number of the battery cells 110 forming the series circuit in the battery module 100 can be selected according to the user requirement, and the unnecessary battery cells 110 are isolated from the series circuit of the battery module 100, so that the output voltage of the battery module 100 can be adjusted, and the multipurpose use of the battery module 100 is realized.
The present application is not limited to the above embodiments, and any changes or substitutions that can be easily understood by those skilled in the art within the technical scope of the present application are intended to be included in the scope of the present application. Therefore, the protection scope of the application is subject to the protection scope of the claims.
Claims (10)
1. A battery module, characterized by comprising a plurality of electric cores (110) and a plurality of tee joint modules (130) which are in one-to-one correspondence with the electric cores (110);
the tee module (130) is provided with a first joint (131), a second joint (133) and a third joint (135);
the second contact (133) and the third contact (135) used by any three-way module (130) are respectively and electrically connected with the first electrode and the second electrode of a plurality of electric cores (110), the first contact (131) is electrically connected with the first electrode or the second electrode of another electric core (110) or the first total electrode (173) of the battery module, and when all the first contacts (131) and the third contacts (135) of the three-way module (130) are conducted, all the electric cores (110) and the first total electrodes (173) are sequentially connected in series;
when the first contact (131) and the second contact (133) of any three-way module (130) are conducted, the three-way module (130) can short the corresponding battery cell (110) so as to isolate the battery cell from a series circuit of the battery module.
2. The battery module according to claim 1, further comprising a three-way module (150), the three-way module (150) having a first connection point (151), a second connection point (153), and a third connection point (155);
the first connection point (151) and the second connection point (153) are respectively connected with the first electrode and the second electrode of one battery cell (110), and the third connection point (155) is connected with a second total electrode (171) of the battery module;
when the first connection point (151) is conducted with the third connection point (155) and all the first connection points (131) and the third connection points (135) of the three-way module (130) are conducted, the first total electrode (173), all the battery cells (110) and the second total electrode (171) are sequentially connected in series;
the first total electrode (173), the other battery cells (110) and the second total electrode (171) can be sequentially connected in series by conducting the first contact (131) and the second contact (133) of the three-way module (130) corresponding to the battery cells (110) electrically connected with the three-way module (150) and conducting the second connection point (153) and the third connection point (155).
3. The battery module according to claim 1 or 2, wherein the battery module further comprises a plurality of detection sensors and a controller;
the detection sensors are arranged on the battery cores (110) in a one-to-one correspondence manner so as to detect operation parameters corresponding to the battery cores (110), wherein the operation parameters represent real-time operation states of the battery cores (110);
the tee joint module (130) is also electrically connected with the controller;
the controller is used for controlling the tee joint module (130) according to the operation parameters so as to enable the first contact (131) to be conducted with the second contact (133) or the third contact (135).
4. The battery module according to claim 3, further comprising an energy release module (180);
the energy discharging module (180) is connected with the positive electrode and the negative electrode of the battery cell (110) and is connected with the controller;
the controller is used for controlling the operation of the energy release module (180) according to the operation parameters so as to discharge the communicated battery cells (110).
5. The battery module according to claim 4, wherein the energy discharging module (180) includes a plurality of energy discharging modules (180) connected to the positive electrodes and the negative electrodes of the plurality of electric cells (110) in a one-to-one correspondence manner, and connected to the controller, and the controller is configured to control the operation of the energy discharging module (180) corresponding to the operation parameter according to the operation parameter.
6. A battery module according to claim 3, wherein the detection sensor comprises a temperature sensor and a voltage sensor, each of the cells (110) being provided with the temperature sensor and the voltage sensor.
7. A control method of a battery module, characterized by being used for the control of the battery module according to any one of claims 1 to 6, the method comprising;
acquiring operation parameters of all the battery cells (110), wherein the operation parameters comprise an operation voltage and/or an operation temperature;
judging whether the operation parameters are in a preset range or not;
if the operation parameters are not in the preset range, the battery cell (110) is marked as a fault battery cell (110), the first contact (131) and the second contact (133) of the tee module (130) corresponding to the fault battery cell (110) are controlled to be conducted, and the first contact (131) and the third contact (135) of the other tee module (130) are controlled to be conducted, so that the fault battery cell (110) is isolated from a series circuit system of the battery module.
8. The battery module control method according to claim 7, wherein the battery module further comprises a three-way module (150), the three-way module (150) having a first connection point (151), a second connection point (153), and a third connection point (155);
the first connection point (151) and the second connection point (153) are respectively connected with the first electrode and the second electrode of one battery cell (110), and the third connection point (155) is connected with a second total electrode (171) of the battery module;
when the first connection point (151) is conducted with the third connection point (155) and all the first connection points (131) and the third connection points (135) of the three-way module (130) are conducted, the first total electrode (173), all the battery cells (110) and the second total electrode (171) are sequentially connected in series;
when the first contact (131) and the second contact (133) of the tee module (130) corresponding to the battery cell (110) electrically connected to the tee module (150) are conducted, the second contact (153) and the third contact (155) are conducted, so that the first total electrode (173), the other battery cell (110) and the second total electrode (171) can be sequentially connected in series;
the control method further includes;
judging whether the fault battery cell (110) is the battery cell (110) electrically connected with the tee joint module (150);
if the fault cell (110) is the cell (110) electrically connected with the tee module (150), controlling the second connection point (153) to be conducted with the third connection point (155);
and if the fault battery cell (110) is not the battery cell (110) electrically connected with the tee joint module (150), controlling the first connection point (151) to be conducted with the third connection point (155).
9. The control method of a battery module according to claim 7 or 8, characterized in that the battery module further comprises a liquid cooling plate (190) for cooling the battery cells (110);
the operating parameters include cell (110) temperature;
the method further comprises;
acquiring an operating temperature of the faulty cell (110);
judging whether the operation temperature of the fault battery cell (110) is higher than a preset temperature or not;
and if the operating temperature of the battery cell (110) is higher than the preset temperature, controlling the liquid cooling plate (190) to operate so as to cool the fault battery cell (110).
10. The control method of a battery module according to claim 9, wherein the battery module further comprises an energy release module (180);
the energy release module (180) is connected with the positive electrode and the negative electrode of the battery cell (110);
the operating parameters further include an operating voltage;
the method further comprises;
judging whether the operation voltage exceeds the maximum value of a preset voltage range and the temperature of the battery cell (110) is smaller than the preset temperature or not;
and if the voltage of the battery cell (110) exceeds the preset voltage and the temperature of the battery cell (110) is smaller than the preset temperature, controlling the energy discharging module (180) communicated with the fault battery cell (110) to operate until the voltage of the fault battery cell (110) is smaller than the preset voltage and controlling the energy discharging module (180) communicated with the fault battery cell to stop operating.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311119147.8A CN117039345A (en) | 2023-08-31 | 2023-08-31 | Battery module and control method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311119147.8A CN117039345A (en) | 2023-08-31 | 2023-08-31 | Battery module and control method thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN117039345A true CN117039345A (en) | 2023-11-10 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202311119147.8A Pending CN117039345A (en) | 2023-08-31 | 2023-08-31 | Battery module and control method thereof |
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| Country | Link |
|---|---|
| CN (1) | CN117039345A (en) |
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2023
- 2023-08-31 CN CN202311119147.8A patent/CN117039345A/en active Pending
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