CN114497817A - Battery and heating method thereof - Google Patents
Battery and heating method thereof Download PDFInfo
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- CN114497817A CN114497817A CN202210060557.9A CN202210060557A CN114497817A CN 114497817 A CN114497817 A CN 114497817A CN 202210060557 A CN202210060557 A CN 202210060557A CN 114497817 A CN114497817 A CN 114497817A
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- 238000010438 heat treatment Methods 0.000 title claims abstract description 63
- 238000000034 method Methods 0.000 title claims abstract description 36
- 238000012544 monitoring process Methods 0.000 claims description 24
- 238000010586 diagram Methods 0.000 description 4
- 230000005669 field effect Effects 0.000 description 3
- 239000004065 semiconductor Substances 0.000 description 3
- 239000011149 active material Substances 0.000 description 2
- 238000007599 discharging Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
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- 229910052744 lithium Inorganic materials 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
- H01M10/60—Heating or cooling; Temperature control
- H01M10/61—Types of temperature control
- H01M10/615—Heating or keeping warm
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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
- H01M10/44—Methods for charging or discharging
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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
- H01M10/44—Methods for charging or discharging
- H01M10/443—Methods for charging or discharging in response to temperature
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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
- H01M50/531—Electrode connections inside a battery casing
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- Secondary Cells (AREA)
- Battery Mounting, Suspending (AREA)
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
Abstract
The embodiment of the application relates to the field of batteries and discloses a heating method of a battery and the battery, wherein the battery comprises a battery core and a first switch unit, the battery core comprises a positive plate and a negative plate, the positive plate comprises two positive lugs and a current collector connected between the two positive lugs, or the negative plate comprises two negative lugs and a current collector connected between the two negative lugs, and a heating loop at which the current collector is arranged is switched on when the battery core needs to be heated, so that the current collector can generate heat, and the battery is heated.
Description
Technical Field
The embodiment of the application relates to the field of batteries, in particular to a battery heating circuit and a battery heating method.
Background
Modern life rhythm is faster and faster, and the consumer demand to the quick speed of charging of battery also improves thereupon, however, single battery charge speed is limited because self physicochemical characteristic influences the speed of charging, and under the low temperature condition, lithium cell dynamics becomes worse, and the charging capacity is also worse, can't charge even, realizes charging at low temperature to quick charge has become the problem that awaits solution urgently.
Disclosure of Invention
The embodiment of the application provides a battery and a heating method of the battery, and the problem that the battery cannot be charged at low temperature can be solved.
The purpose of the embodiment of the application is realized by the following technical scheme:
in order to solve the above technical problem, in a first aspect, an embodiment of the present application provides a battery, including: the battery comprises a battery core, wherein the battery core comprises a positive plate and a negative plate, the negative plate comprises a negative lug connected with the negative output end of the battery, the positive plate comprises a first positive lug and a second positive lug, the first positive lug is connected with the first positive output end of the battery, and a current collector is connected between the first positive lug and the second positive lug; the first switch unit is connected between the second positive lug and the negative output end and is configured to be conducted when the battery core needs to be heated, so that the first positive output end, the first positive lug, the current collector, the second positive lug and the negative output end form a heating loop.
In some embodiments, the battery further comprises: the temperature monitoring unit is configured to acquire temperature data of the battery cell; the input end of the logic control unit is connected with the temperature monitoring unit, and the first control end of the logic control unit is connected with the first switch unit and is configured to control the on-off of the switch unit according to the temperature data.
In some embodiments, the second positive tab is connected to the second positive output end of the battery cell, and the battery further includes: the second switch unit is connected between the second positive lug and the second positive output end and is configured to be turned off when the battery core needs to be heated; and a second control end of the logic control unit is connected with the second switch unit and is configured to control the on-off of the second switch unit according to the temperature data.
In some embodiments, the battery further comprises: the third switching unit is connected between the negative electrode lug and the negative electrode output end and is configured to be turned off when the battery cell needs to be heated; and a third control end of the logic control unit is connected with the third switch unit and is configured to control the on-off of the third switch unit according to the temperature data.
In some embodiments, the battery further comprises: the fourth switch unit is connected in series with the third switch unit and then connected between the negative electrode lug and the negative electrode output end, and is configured to be turned off when the battery core needs to be heated; and the output end of the protection unit is connected with the control end of the fourth switch unit and is configured to control the on-off of the fourth switch unit.
In some embodiments, the fourth control end of the logic control unit is connected to the enable end of the protection unit, and the logic control unit is further configured to supply power to the protection unit after the temperature data is lower than a preset threshold, so that the protection unit controls the fourth switching unit to be turned off.
In order to solve the above technical problem, in a second aspect, an embodiment of the present application provides a battery, including: the battery comprises a battery core and a battery cover, wherein the battery cover comprises a first cover plate and a second cover plate, the first cover plate comprises a first cover plate and a second cover plate, the second cover plate comprises a second cover plate and a second cover plate, the first cover plate is connected with the second cover plate, the second cover plate is connected with the first cover plate, the second cover plate is connected with the second cover plate, and the second cover plate is connected with the second cover plate; and the first switch unit is connected between the second negative electrode lug and the positive electrode output end and is configured to be switched on when the battery core needs to be heated, so that the first negative electrode output end, the first negative electrode lug, the current collector, the second negative electrode lug and the first positive electrode output end form a heating loop.
In some embodiments, the battery further comprises: a temperature monitoring unit configured to acquire temperature data of the battery cell; and the input end of the logic control unit is connected with the temperature monitoring unit, and the first control end of the logic control unit is connected with the first switch unit and is configured to control the on-off of the switch unit according to the temperature data.
In some embodiments, the battery further comprises: the second switch unit is connected between the positive lug and the positive output end and is configured to be turned off when the battery cell needs to be heated; and a second control end of the logic control unit is connected with the second switch unit and is configured to control the on-off of the second switch unit according to the temperature data.
In some embodiments, the second negative tab is connected to a second negative output of the battery, the battery further comprising: a third switching unit connected between the second negative tab and the second negative output terminal and configured to be turned off when the battery cell needs to be heated; and a third control end of the logic control unit is connected with the third switch unit and is configured to control the on-off of the third switch unit according to the temperature data.
In some embodiments, the battery further comprises: a fourth switching unit connected between the first negative tab and the first negative output end and configured to be turned on when the battery cell needs to be heated; a fifth switching unit which is connected in series with the third switching unit and then connected between the second negative electrode tab and the second negative electrode output end, and is configured to be turned on when the battery cell needs to be heated; the output end of the first protection unit is connected with the control end of the fourth switch unit and is configured to control the on-off of the fourth switch unit; and the output end of the second protection unit is connected with the control end of the fifth switch unit and is configured to control the on-off of the fifth switch unit.
In some embodiments, the fourth control terminal of the logic control unit is connected to the enable terminal of the first protection unit, the fifth control terminal of the logic control unit is connected to the enable terminal of the second protection unit, and the logic control unit is further configured to supply power to the first protection unit and the second protection unit after the temperature data is lower than a preset threshold, so that the first protection unit controls the fourth switch unit to be turned on, and the second protection unit controls the fifth switch unit to be turned on.
In order to solve the above technical problem, in a third aspect, an embodiment of the present application provides a method for heating a battery, which is applied to the battery according to the first aspect or the second aspect, and the method includes: when the battery core needs to be heated, the first switch unit is controlled to be switched on, or the first switch unit, the fourth switch unit and the fifth switch unit are controlled to be switched on, so that the heating loop is switched on, and the current collector is heated.
In some embodiments, the method further comprises: if the battery does not need to be heated, controlling the heating loop to be disconnected; and closing the second control unit and the fourth switch unit, or closing the second switch unit, the third switch unit, the fourth switch unit and the protection unit to control the positive lug of the battery cell and the conductive loop of the positive output end of the battery, and control the negative lug of the battery cell and the conductive loop of the negative output end of the battery to be conducted, so that the battery is charged and discharged.
In some embodiments, when the battery includes two positive tabs and one negative tab, before controlling the first switching unit to conduct the first conductive loop, the method further includes: and disconnecting the second switch unit, the third switch unit and the fourth switch unit, or disconnecting the second switch unit and the fourth switch unit to disconnect one of the positive tab and the positive output end of the battery and the negative tab and the negative output end of the battery.
In some embodiments, when the battery includes one positive tab and two negative tabs, before controlling the first switching unit to be turned on to turn on the first conductive loop, the method further includes: and disconnecting the second switch unit, the third switch unit, the fourth switch unit and the protection unit so as to disconnect the connection between the positive lug and the positive output end of the battery and the connection between the negative lug and the negative output end of the battery.
Compared with the prior art, the invention has the beneficial effects that: different from the situation of the prior art, the embodiment of the application provides a heating method for a battery and a battery, the battery comprises a battery core and a first switch unit, the battery core comprises a positive plate and a negative plate, the positive plate comprises two positive lugs and a current collector connected between the two positive lugs, or the negative plate comprises two negative lugs and a current collector connected between the two negative lugs, a heating loop where the current collector is located is switched on when the battery core needs to be heated, so that the current collector can generate heat, and the battery is heated.
Drawings
One or more embodiments are illustrated by the accompanying figures in the drawings that correspond thereto and are not to be construed as limiting the embodiments, wherein elements/modules and steps having the same reference numerals are represented by like elements/modules and steps, unless otherwise specified, and the drawings are not to scale.
Fig. 1 is a schematic structural diagram of a battery provided in an embodiment of the present application;
fig. 2 is a schematic structural diagram of another battery provided in the first embodiment of the present application;
fig. 3 is a schematic structural diagram of a battery provided in the second embodiment of the present application;
fig. 4 is a schematic structural diagram of another battery provided in the second embodiment of the present application;
fig. 5 is a schematic flow chart of a heating method for a battery according to a third embodiment of the present application;
fig. 6 is a schematic flow chart of another battery heating method provided in the third embodiment of the present application;
fig. 7 is a schematic flow chart of another method for heating a battery according to the third embodiment of the present application;
fig. 8 is a schematic flow chart of another battery heating method provided in the third embodiment of the present application.
Detailed Description
The present invention will be described in detail with reference to specific examples. The following examples will assist those skilled in the art in further understanding the invention, but are not intended to limit the invention in any way. It should be noted that variations and modifications can be made by persons skilled in the art without departing from the spirit of the invention. All falling within the scope of the present invention.
In order to make the objects, technical solutions and advantages of the present application more apparent, the present application is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present application and are not intended to limit the present application.
It should be noted that, if not conflicted, the various features of the embodiments of the present application may be combined with each other within the scope of protection of the present application. Additionally, while functional block divisions are performed in apparatus schematics, with logical sequences shown in flowcharts, in some cases, steps shown or described may be performed in sequences other than block divisions in apparatus or flowcharts. Further, the words "first", "second", "third", "fourth", "fifth", and the like, as used herein do not limit the data and the order of execution, but merely distinguish between the same or similar items that have substantially the same function and effect. It will be understood that 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 be present.
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 in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.
In addition, the technical features involved in the embodiments of the present invention described below may be combined with each other as long as they do not conflict with each other.
In order to solve the problem that the charging capability of the current battery is poor at low temperature, the embodiment of the application provides a heating method for the battery and the battery, the battery comprises an electric core and a first switch unit, the electric core comprises a positive plate and a negative plate, the positive plate comprises two positive lugs, a current collector is connected between the two positive lugs, or the negative plate comprises two negative lugs, a current collector is connected between the two negative lugs, a heating loop where the current collector is located is switched on when the electric core needs to be heated, so that the current collector can generate heat, and the battery is heated.
Specifically, the embodiments of the present application will be further explained below with reference to the drawings.
Example one
The present embodiment provides a battery, please refer to fig. 1, which shows a structure of the battery provided by the present embodiment, wherein the dashed arrows in fig. 1 indicate flowing directions of currents, and each electronic device flowing through the currents indicated by the dashed arrows forms the heating circuit, and the battery 10 includes: a battery cell 11 and a first switching unit 12. Further, the battery 10 may further include a temperature monitoring unit 13, a logic control unit 14, a second switching unit 15, a third switching unit 16, a fourth switching unit 17, and a protection unit 18.
The battery core 11 comprises a positive plate and a negative plate, the negative plate comprises a negative tab B-connected with a negative output end P-of the battery 10, the positive plate comprises a first positive tab B1+ and a second positive tab B2+, the first positive tab B1+ is connected with a first positive output end P1+ of the battery 10, and a current collector r is connected between the first positive tab B1+ and the second positive tab B2 +; the current collector r is a current collector coated with an active material inside the battery cell 11, and current passes through the current collector from the first positive electrode tab B1+, then reaches the second positive electrode tab B2+, and finally is directly pulled to the negative electrode output end P-from a circuit on the protection plate.
The first switch unit 12 is connected between the second positive tab B-and the negative output terminal P-, and is configured to be turned on when the battery cell 11 needs to be heated, so that the first positive output terminal P1+, the first positive tab B1+, the current collector r, the second positive tab B2+, and the negative output terminal P-form a heating loop. Specifically, the first switch unit 12 may be a Metal-Oxide-Semiconductor Field Effect Transistor (MOSFET), which is also called a switch Q2 in fig. 1.
In some embodiments, please continue to refer to fig. 1, the temperature monitoring unit 13 is configured to collect temperature data of the battery cell 11; in particular, the temperature monitoring unit 13 may be a temperature sensor. The input end of the logic control unit 14 is connected to the temperature monitoring unit 13, and the first control end of the logic control unit 14 is connected to the first switch unit 12 and is configured to control the on/off of the first switch unit 12 according to the temperature data. Specifically, after it is detected that the temperature of the battery cell 11 is lower than a preset threshold, the first switch unit 12 is controlled to be turned on, so that the heating loop is formed and works, and the preset threshold may be set according to actual needs. For example, when the application scenario is a mobile phone, in order to prevent the mobile phone from being shut down due to too low temperature and unable to work normally, the preset threshold may be set to zero degrees centigrade, and when the temperature is detected to be lower than zero degrees centigrade, the first switch unit 12 is controlled to be turned on to heat the battery of the mobile phone, and the preset threshold may be specifically set according to actual needs and the application scenario, and does not need to be restricted by the limitation of the embodiment of the present application.
In some embodiments, with continued reference to fig. 1, the second positive tab B2+ is connected to the second positive output terminal P2+ of the battery cell 11, and the second switch unit 15 is connected between the second positive tab B2+ and the second positive output terminal P2+ and is configured to be turned off when the battery cell 11 needs to be heated; a second control end of the logic control unit 14 is connected to the second switch unit 15, and is configured to control on/off of the second switch unit 15 according to the temperature data. After it is detected that the temperature of the battery cell 11 is lower than a preset threshold, the second switching unit 15 is controlled to be turned off, specifically, in fig. 1, the second switching unit 15 is a switching tube Q10.
In some embodiments, with continued reference to fig. 1, the third switching unit 16 is connected between the negative tab B-and the negative output terminal P-and is configured to be turned off when the battery cell 11 needs to be heated; a third control end of the logic control unit 14 is connected to the third switching unit 16, and is configured to control on/off of the third switching unit 16 according to the temperature data. After it is detected that the temperature of the battery cell 11 is lower than a preset threshold, the third switching unit 16 is controlled to be turned off, specifically, in fig. 1, the third switching unit 16 is a switching tube Q4.
In some embodiments, with continued reference to fig. 1, the fourth switching unit 17 is connected in series with the third switching unit 16 and then connected between the negative tab B-and the negative output terminal P-, and is configured to be turned off when the battery cell 11 needs to be heated; the output end of the protection unit 18 is connected to the control end of the fourth switching unit 17, and is configured to be able to control on/off of the fourth switching unit 17. After the temperature of the battery cell 11 is detected to be lower than the preset threshold, the fourth switching unit 17 is controlled to be turned off, specifically, in fig. 1, the fourth switching unit 17 is composed of a switching tube Q1 and a switching tube Q3 which are connected in series.
When the circuit structure shown in fig. 1 provided in the embodiment of the present application is in operation, the temperature monitoring unit 13 monitors the temperature of the battery cell 11 in the charging process, and transmits the monitored temperature data to the logic determination control unit 14 to determine whether the current temperature reaches the preset threshold, so as to determine whether to perform a heating operation or a charging operation: charging if the current temperature reaches a preset threshold value; and if the current temperature does not reach the set charging temperature, heating. The heating logic judgment control unit 14 controls the switching tube Q10 (i.e. the second switching unit 15) to be turned off, so that the connection between B2+ and P2+ is disconnected; then the switching tube Q4 (i.e. the third switching unit 16) is controlled to be turned off; then, the switching tube Q2 (namely the first switching unit 12) is controlled to be switched on, so that a positive lug is connected to the negative output end P-; after the operation, the two positive lugs are respectively connected to the positive and negative output ends, and the current flows through the current collector r between the positive lugs through the positive and negative output ends, so that the heating purpose is achieved. When the temperature monitoring unit 13 monitors that the temperature reaches the preset threshold value, the logic judgment control unit 14 sequentially turns off the switch tube Q2 and the switch tube Q10, and then supplies power to the enable pin of the protection unit 18, so that the positive tab is restored to be connected to the positive output end, and the negative tab is connected to the negative output end, and normal charging is performed.
In some embodiments, please refer to fig. 2, which illustrates another structure of the battery provided in the embodiment of the present application, wherein dashed arrows in fig. 2 indicate flowing directions of currents, and each electronic device through which the current indicated by each dashed arrow forms the heating circuit, the example shown in fig. 2 is different from the example shown in fig. 1 in that the fourth switching unit 17 is not present, and the fourth control terminal of the logic control unit 14 is further connected to the enable terminal of the protection unit 18, and the logic control unit 14 is further configured to supply power to the protection unit 18 after the temperature data is lower than a preset threshold, so that the protection unit 18 controls the fourth switching unit 17 to be turned off.
In practical cases, the protection unit 18 and the logic control unit 14 may be two independent processors and chips, and their structures and control circuits are as shown in fig. 1 when there is no control logic relationship between the protection unit 18 and the logic control unit 14, and as shown in fig. 2 when there is a control logic relationship between the protection unit 18 and the logic control unit 14; alternatively, the protection unit 18 and the logic control unit 14 may be disposed in a chip or a processor, and in this case, the control circuit thereof is as shown in fig. 2.
When the circuit structure shown in fig. 2 provided in the embodiment of the present application is in operation, the temperature monitoring unit 13 monitors the temperature of the battery cell 11 in the charging process, and transmits the monitored temperature data to the logic determination control unit 14 to determine whether the current temperature reaches the preset threshold, so as to determine whether to perform a heating operation or a charging operation: charging if the current temperature reaches a preset threshold value; and if the current temperature does not reach the set charging temperature, heating. The heating logic judgment control unit 14 controls the switching tube Q10 (i.e. the second switching unit 15) to be turned off, so as to disconnect the connection between B2+ and P2 +; then, the protection unit 18 is controlled to enable the pin to power off the protection chip, so that the switching tube Q1 and the switching tube Q3 (i.e. the fourth switching unit 17) are turned off; then the switching tube Q2 (i.e. the first switching unit 12) is controlled to be switched on, so that the second positive lug B2+ is connected to the negative output end P-; after the operation, the two positive lugs are respectively connected to the positive and negative output ends, and the current flows through the current collector r between the positive lugs through the positive and negative output ends, so that the heating purpose is achieved. When the temperature monitoring unit 13 monitors that the temperature reaches the preset threshold value, the logic judgment control unit 14 sequentially turns off the switch tube Q2 and the switch tube Q10, and then supplies power to the enable pin of the protection unit 18, so that the positive tab is restored to be connected to the positive output end, and the negative tab is connected to the negative output end, and normal charging is performed.
Example two
The present embodiment provides a battery, please refer to fig. 3, which shows a structure of the battery provided by the present embodiment, wherein the dashed arrows in fig. 3 indicate flowing directions of currents, and each electronic device flowing through the currents indicated by the dashed arrows forms the heating circuit, and the battery 10 includes: a battery cell 11 and a first switching unit 12. Further, the battery 10 may further include a temperature monitoring unit 13, a logic control unit 14, a second switching unit 15, a third switching unit 16, a fourth switching unit 17, a fifth switching unit 18, a first protection unit 19a, and/or a second protection unit 19 b.
The battery cell 11 comprises a positive plate and a negative plate, the positive plate comprises a positive tab B + connected with a positive output end P + of the battery 10, the negative plate comprises a first negative tab B1-and a second negative tab B2-, the first negative tab B1-is connected with a first negative output end P1-of the battery 10, and a current collector r is connected between the first negative tab B1-and the second negative tab B2-; the current collector r is a current collector coated with an active material inside the battery cell 11, current is input from the positive electrode output end P +, and is directly pulled to the second negative electrode tab B2-from a circuit on the protection plate, then passes through the current collector, and then reaches the first negative electrode tab B1-, and finally forms a loop through the negative electrode output end P-.
The first switch unit 12 is connected between the second negative tab B2 "and the positive output terminal P +, and is configured to be turned on when the battery cell 11 needs to be heated, so that the positive output terminal P +, the second negative tab B2", the current collector r, the first negative tab B1 ", and the first negative output terminal P1" form a heating loop. Specifically, the first switch unit 12 may be a Metal-Oxide-Semiconductor Field Effect Transistor (MOSFET), which is a Metal-Oxide-Semiconductor Field-Effect Transistor (MOSFET), that is, a switch Q8 in fig. 3.
In some embodiments, please continue to refer to fig. 3, the temperature monitoring unit 13 is configured to collect temperature data of the battery cell 11; in particular, the temperature monitoring unit 13 may be a temperature sensor. The input end of the logic control unit 14 is connected to the temperature monitoring unit 13, and the first control end thereof is connected to the first switch unit 12, and is configured to control the on/off of the first switch unit 12 according to the temperature data. Specifically, after it is detected that the temperature of the battery cell 11 is lower than a preset threshold, the first switch unit 12 is controlled to be turned on, so that the heating loop is formed and works, and the preset threshold may be set according to actual needs. For example, when the application scenario is a mobile phone, in order to prevent the mobile phone from being shut down due to too low temperature and unable to work normally, the preset threshold value may be set to zero, and when the temperature is detected to be lower than zero, the first switch unit 12 is controlled to be turned on to heat the battery of the mobile phone, and the preset threshold value may be specifically set according to actual needs and the application scenario, and does not need to be limited by the embodiment of the present application.
In some embodiments, continuing to refer to fig. 3, the battery 10 further comprises: a second switch unit 15 connected between the positive tab B + and the positive output terminal P +, and configured to be turned off when the battery cell 11 needs to be heated; a second control end of the logic control unit 14 is connected to the second switch unit 15, and is configured to control on/off of the second switch unit 15 according to the temperature data. After it is detected that the temperature of the battery cell 11 is lower than a preset threshold, the second switching unit 15 is controlled to be turned off, specifically, in fig. 3, the second switching unit 15 is a switching tube Q9.
In some embodiments, with continued reference to fig. 3, the second negative tab B2-is connected to the second negative output terminal P2-of the battery 10, and the battery 10 further comprises: a third switching unit 16 connected between the second negative tab B2-and the second negative output terminal P2-and configured to be turned off when the battery cell 11 needs to be heated; a third control end of the logic control unit 14 is connected to the third switching unit 16, and is configured to control on/off of the third switching unit 16 according to the temperature data. After it is detected that the temperature of the battery cell 11 is lower than a preset threshold, the third switching unit 16 is controlled to be turned off, specifically, in fig. 3, the third switching unit 16 is a switching tube Q7. The third switching unit 16 is used to prevent the positive output terminal and the negative output terminal of the battery 10 from being short-circuited through external connection.
In some embodiments, continuing to refer to fig. 3, the battery 10 further comprises: a fourth switching unit 17 connected between the first negative tab B1-and the first negative output terminal P1-, and configured to be turned on when the battery cell 11 needs to be heated; a fifth switching unit 18 connected in series with the third switching unit 16 and then connected between the second negative tab B2-and the second negative output terminal P2-, and configured to be turned on when the battery cell 11 needs to be heated; a first protection unit 19a, an output end of which is connected to the control end of the fourth switching unit 17 and is configured to be able to control on/off of the fourth switching unit 17; and an output end of the second protection unit 19b is connected to the control end of the fifth switch unit 18, and is configured to control on/off of the fifth switch unit 18. After the temperature of the battery cell 11 is detected to be lower than the preset threshold, the fourth switching unit 17 and the fifth switching unit 18 are controlled to be turned on to form a heating loop in the current direction indicated by a dotted line, specifically, in fig. 3, the fourth switching unit 17 is composed of a switching tube Q1 and a switching tube Q3 which are connected in series, and the fifth switching unit 18 is composed of a switching tube Q5 and a switching tube Q6 which are connected in series.
When the circuit structure shown in fig. 3 provided in the embodiment of the present application is in operation, the temperature monitoring unit 13 monitors the temperature of the battery cell 11 in the charging process, and transmits the monitored temperature data to the logic determination control unit 14 to determine whether the current temperature reaches the preset threshold, so as to determine whether to perform a heating operation or a charging operation: charging if the current temperature reaches a preset threshold value; and if the current temperature does not reach the set charging temperature, heating. During heating, the logic judgment control unit 14 controls the switching tube Q7 (namely, the third switching unit 16) and the switching tube Q9 (namely, the second switching unit 15) to be turned off, the connection between the second negative pole lug B2-and the second negative pole output end P2-and the connection between the positive pole lug B + and the positive pole output end P + are disconnected, and then controls the switching tube Q8 (namely, the first switching unit 12) to be turned on, so that one negative pole lug is connected to the positive pole output end P +; after the operation, the two negative electrode lugs are respectively connected to the positive and negative output ends, and current flows through the current collector r between the negative electrode lugs through the positive and negative output ends to achieve the purpose of heating. When the temperature monitoring unit 13 monitors that the temperature reaches the preset threshold value, the logic judgment control unit 14 turns off the switching tube Q8, and then turns on the switching tube Q7 and the switching tube Q9 in sequence, so as to recover the positive electrode tab to be connected to the positive electrode output end, and the negative electrode tab to be connected to the negative electrode output end, thereby performing normal charging.
In some embodiments, please refer to fig. 4, which shows another structure of the battery provided by the embodiments of the present application, wherein the dotted arrows in fig. 4 indicate the flowing direction of the current, the respective electronic devices through which the current indicated by the respective dotted arrows flows constitute the heating circuit, the fourth control terminal of the logic control unit 14 is connected to the enable terminal of the first protection unit 19a, the fifth control terminal of the logic control unit 14 is connected to the enable terminal of the second protection unit 19b, the logic control unit 14 is further configured to supply power to the first protection unit 19a and the second protection unit 19b after the temperature data is lower than a preset threshold, so that the first protection unit 19a controls the conduction of the fourth switching unit 17 and the second protection unit 19b controls the conduction of the fifth switching unit 18.
In the example shown in fig. 4, the fifth switching unit 18 further includes a switching tube Q11, and the switching tube Q11 is connected in parallel to two ends of the switching tube Q5 and the switching tube Q6 that are connected in series, in this case, the switching tube Q5 and the switching tube Q6 are configured to be turned off when the battery cell 11 needs to be heated, and the switching tube Q11 is configured to be turned on when the battery cell 11 needs to be heated, so that the fifth switching unit 18 is turned on when the battery cell 11 needs to be heated, and a conducting loop of the heating loop is formed.
In practical cases, the first protection unit 19a and the second protection unit 19b and the logic control unit 14 may be processors and chips independent of each other, and their structures and control circuits are as shown in fig. 3 when the first protection unit 19a and the second protection unit 19b do not have a control logic relationship with the logic control unit 14, and as shown in fig. 2 when the first protection unit 19a and the second protection unit 19b have a control logic relationship with the logic control unit 14; alternatively, the first protection unit 19a, the second protection unit 19b and the logic control unit 14 may be disposed in a chip or a processor, and in this case, the control circuit thereof is as shown in fig. 4.
When the circuit structure shown in fig. 4 provided in the embodiment of the present application is in operation, the temperature monitoring unit 13 monitors the temperature of the battery cell 11 in the charging process, and transmits the monitored temperature data to the logic determination control unit 14 to determine whether the current temperature reaches the preset threshold, so as to determine whether to perform a heating operation or a charging operation: charging if the current temperature reaches a preset threshold value; and if the current temperature does not reach the set charging temperature, heating. During heating, the logic judgment control unit 14 controls the switching tube Q7 (namely, the third switching unit 16) and the switching tube Q9 (namely, the second switching unit 15) to be turned off, disconnects the connection between the second negative pole lug B2-and the second negative pole output end P2-and the connection between the positive pole lug B + and the positive pole output end P +, and then controls the switching tube Q11 (namely, the fifth switching unit 18) and the switching tube (namely, the first switching unit 12) to be turned on, so that one negative pole lug is connected to the positive pole P + of the output end; after the operation, the two negative electrode lugs are respectively connected to the positive and negative output ends, and current flows through the current collector r between the negative electrode lugs through the positive and negative output ends to achieve the purpose of heating. When the temperature monitoring unit 13 monitors that the temperature reaches the preset threshold value, the logic judgment control unit 14 disconnects the switching tube Q11 and the switching tube Q8, then closes the switching tube Q7 and the switching tube Q9 in sequence, restores the positive tab to be connected to the positive output end, and restores the negative tab to be connected to the negative output end, so that normal charging is performed.
EXAMPLE III
An embodiment of the present application provides a method for heating a battery, which may be applied to the battery described in the first embodiment or the second embodiment, please refer to fig. 5, which shows a flow of the method for heating a battery provided in the embodiment of the present application, where the method includes:
step S1: when the battery core needs to be heated, the first switch unit is controlled to be switched on, or the first switch unit, the fourth switch unit and the fifth switch unit are controlled to be switched on, so that the heating loop is switched on, and the current collector is heated.
In this application embodiment, when it is detected that the electric core temperature is lower than the preset threshold value, the first switch unit connected between the positive electrode tab and the negative electrode tab is controlled to be turned on, or the first switch unit, the fourth switch unit and the fifth switch unit connected between the positive electrode tab and the negative electrode tab are controlled to be turned on, so that the current collectors between the two positive electrode tabs or the current collectors between the two negative electrode tabs can generate heat, and the heating of the battery is realized.
In some embodiments, please refer to fig. 6, which illustrates a flow chart of another method for heating a battery provided in an embodiment of the present application, the method further includes:
step S2: if the battery does not need to be heated, controlling the heating loop to be disconnected;
step S3: and closing the second control unit and the fourth switch unit, or closing the second switch unit, the third switch unit and the fourth switch unit to control the conductive loop comprising the positive lug of the battery cell and the positive output end of the battery and control the conductive loop comprising the negative lug of the battery cell and the negative output end of the battery to be conducted so as to charge and discharge the battery.
In this application embodiment, when the temperature of the electric core of battery is not less than preset threshold value, the battery need not heat, and at this moment, control first switch unit disconnection, in order to control heating circuit disconnection to closed second control unit and fourth switch unit, perhaps, closed second switch unit, third switch unit, fourth switch unit and protection unit, in order to control the positive ear of electric core with the positive output of battery switches on, controls the negative ear of electric core with the negative output of battery switches on, makes electric core in the battery can normal charge-discharge.
In some embodiments, please refer to fig. 7, which illustrates a flow chart of a heating method for a battery provided in an embodiment of the present application, where the battery includes two positive tabs and one negative tab, before controlling the first switching unit to be turned on to turn on the first conductive loop, the method further includes:
step S4: and disconnecting the second switch unit, the third switch unit and the fourth switch unit, or disconnecting the second switch unit and the fourth switch unit to disconnect one of the positive tab and the positive output end of the battery and the negative tab and the negative output end of the battery.
In the embodiment of the present application, when there are two positive tabs, that is, in the case shown in the first embodiment, the second switch unit, the third switch unit, and the fourth switch unit need to be disconnected, or the second switch unit and the fourth switch unit need to be disconnected, so as to disconnect one positive tab from the positive output end of the battery and the negative tab from the negative output end of the battery, so as to avoid potential safety hazard caused by charging and discharging while heating the battery.
In some embodiments, please refer to fig. 8, which illustrates a flow chart of a heating method for a battery provided in an embodiment of the present application, where the battery includes one positive tab and two negative tabs, before controlling the first switching unit to be turned on to turn on the first conductive loop, the method further includes:
step S5: and disconnecting the second switch unit, the third switch unit, the fourth switch unit and the protection unit so as to disconnect the connection between the positive lug and the positive output end of the battery and the connection between the negative lug and the negative output end of the battery.
In the embodiment of the present application, when there are two negative electrode tabs, that is, in the case of the second embodiment, the second switch unit, the third switch unit, the fourth switch unit, and the protection unit need to be disconnected to disconnect one of the positive electrode tabs from the positive electrode output end of the battery and the negative electrode tab from the negative electrode output end of the battery, so as to avoid potential safety hazards due to charging and discharging while the battery is heated.
The embodiment of the application provides a battery and a heating method of the battery, the battery comprises an electric core and a first switch unit, the electric core comprises a positive plate and a negative plate, the positive plate comprises two positive lugs and a current collector is connected between the two positive lugs, or the negative plate comprises two negative lugs and a current collector is connected between the two negative lugs, a heating loop where the current collector is located is conducted when the electric core needs to be heated, so that the current collector can generate heat, and the battery is heated.
It should be noted that the above-described device embodiments are merely illustrative, where the units described as separate parts may or may not be physically separate, and the parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on multiple network units. Some or all of the modules may be selected according to actual needs to achieve the purpose of the solution of the present embodiment.
Finally, it should be noted that: the above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; within the idea of the invention, also technical features in the above embodiments or in different embodiments may be combined, steps may be implemented in any order, and there are many other variations of the different aspects of the invention as described above, which are not provided in detail for the sake of brevity; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention.
Claims (16)
1. A battery, comprising:
the battery comprises a battery core, wherein the battery core comprises a positive plate and a negative plate, the negative plate comprises a negative lug connected with the negative output end of the battery, the positive plate comprises a first positive lug and a second positive lug, the first positive lug is connected with the first positive output end of the battery, and a current collector is connected between the first positive lug and the second positive lug;
the first switch unit is connected between the second positive lug and the negative output end and is configured to be conducted when the battery core needs to be heated, so that the first positive output end, the first positive lug, the current collector, the second positive lug and the negative output end form a heating loop.
2. The battery of claim 1, further comprising:
the temperature monitoring unit is configured to acquire temperature data of the battery cell;
the input end of the logic control unit is connected with the temperature monitoring unit, and the first control end of the logic control unit is connected with the first switch unit and is configured to control the on-off of the first switch unit according to the temperature data.
3. The battery of claim 2, wherein the second positive tab is connected to the second positive output of the cell, and wherein the battery further comprises:
the second switch unit is connected between the second positive lug and the second positive output end and is configured to be turned off when the battery core needs to be heated;
and a second control end of the logic control unit is connected with the second switch unit and is configured to control the on-off of the second switch unit according to the temperature data.
4. The battery of claim 2, further comprising:
the third switching unit is connected between the negative electrode lug and the negative electrode output end and is configured to be turned off when the battery cell needs to be heated;
and a third control end of the logic control unit is connected with the third switch unit and is configured to control the on-off of the third switch unit according to the temperature data.
5. The battery of claim 4, further comprising:
the fourth switch unit is connected in series with the third switch unit and then connected between the negative electrode lug and the negative electrode output end, and is configured to be turned off when the battery core needs to be heated;
and the output end of the protection unit is connected with the control end of the fourth switch unit and is configured to control the on-off of the fourth switch unit.
6. The battery according to claim 5,
the fourth control end of the logic control unit is connected with the enable end of the protection unit, and the logic control unit is further configured to supply power to the protection unit when the temperature data is lower than a preset threshold value, so that the protection unit controls the fourth switch unit to be turned off.
7. A battery, comprising:
the battery comprises a battery core and a battery cover, wherein the battery cover comprises a first cover plate and a second cover plate, the first cover plate comprises a first cover plate and a second cover plate, the second cover plate comprises a second cover plate and a second cover plate, the first cover plate is connected with the second cover plate, the second cover plate is connected with the first cover plate, the second cover plate is connected with the second cover plate, and the second cover plate is connected with the second cover plate;
and the first switch unit is connected between the second negative electrode lug and the positive electrode output end and is configured to be switched on when the battery core needs to be heated, so that the first negative electrode output end, the first negative electrode lug, the current collector, the second negative electrode lug and the first positive electrode output end form a heating loop.
8. The battery of claim 7, further comprising:
a temperature monitoring unit configured to acquire temperature data of the battery cell;
and the input end of the logic control unit is connected with the temperature monitoring unit, and the first control end of the logic control unit is connected with the first switch unit and is configured to control the on-off of the first switch unit according to the temperature data.
9. The battery of claim 8, further comprising:
the second switch unit is connected between the positive lug and the positive output end and is configured to be turned off when the battery cell needs to be heated;
and a second control end of the logic control unit is connected with the second switch unit and is configured to control the on-off of the second switch unit according to the temperature data.
10. The battery of claim 8, wherein the second negative tab is connected to a second negative output of the battery, the battery further comprising:
a third switching unit connected between the second negative tab and the second negative output terminal and configured to be turned off when the battery cell needs to be heated;
and a third control end of the logic control unit is connected with the third switch unit and is configured to control the on-off of the third switch unit according to the temperature data.
11. The battery of claim 10, further comprising:
a fourth switching unit connected between the first negative electrode tab and the first negative electrode output end and configured to be turned on when the battery cell needs to be heated;
a fifth switching unit which is connected in series with the third switching unit and then connected between the second negative electrode tab and the second negative electrode output end, and is configured to be turned on when the battery cell needs to be heated;
the output end of the first protection unit is connected with the control end of the fourth switch unit and is configured to control the on-off of the fourth switch unit;
and the output end of the second protection unit is connected with the control end of the fifth switch unit and is configured to control the on-off of the fifth switch unit.
12. The battery according to claim 11,
the fourth control end of the logic control unit is connected with the enabling end of the first protection unit, the fifth control end of the logic control unit is connected with the enabling end of the second protection unit, the logic control unit is further configured to be powered by the first protection unit and the second protection unit after the temperature data is lower than a preset threshold value, so that the first protection unit controls the fourth switch unit to be switched on, and the second protection unit controls the fifth switch unit to be switched on.
13. A method for heating a battery, the method being applied to a battery according to any one of claims 1 to 12, the method comprising:
when the battery core needs to be heated, the first switch unit is controlled to be switched on, or the first switch unit, the fourth switch unit and the fifth switch unit are controlled to be switched on, so that the heating loop is switched on, and the current collector is heated.
14. The battery of claim 13, wherein the method further comprises:
if the battery does not need to be heated, controlling the heating loop to be disconnected;
and closing the second control unit and the fourth switch unit, or closing the second switch unit, the third switch unit and the fourth switch unit to control the conductive loop comprising the positive lug of the battery cell and the positive output end of the battery and control the conductive loop comprising the negative lug of the battery cell and the negative output end of the battery to be conducted so as to charge and discharge the battery.
15. The battery of claim 13, wherein when the battery includes two positive tabs and one negative tab, prior to controlling the first switching unit to conduct the first conductive loop, the method further comprises:
and disconnecting the second switch unit, the third switch unit and the fourth switch unit, or disconnecting the second switch unit and the fourth switch unit to disconnect one of the positive tab and the positive output end of the battery and the negative tab and the negative output end of the battery.
16. The battery of claim 13, wherein when the battery includes one positive tab and two negative tabs, before controlling the first switching unit to conduct the first conductive loop, the method further comprises:
and disconnecting the second switch unit, the third switch unit, the fourth switch unit and the protection unit so as to disconnect the connection between the positive lug and the positive output end of the battery and the connection between the negative lug and the negative output end of the battery.
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| CN202210060557.9A CN114497817A (en) | 2022-01-19 | 2022-01-19 | Battery and heating method thereof |
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| CN202210060557.9A CN114497817A (en) | 2022-01-19 | 2022-01-19 | Battery and heating method thereof |
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