CN211790897U - Battery device, battery power supply device, and electronic apparatus - Google Patents
Battery device, battery power supply device, and electronic apparatus Download PDFInfo
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- CN211790897U CN211790897U CN202020388395.8U CN202020388395U CN211790897U CN 211790897 U CN211790897 U CN 211790897U CN 202020388395 U CN202020388395 U CN 202020388395U CN 211790897 U CN211790897 U CN 211790897U
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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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Abstract
The embodiment of the utility model discloses battery device, battery power supply unit and electronic equipment, this battery device includes: the device comprises a charging and discharging battery, a thermoelectric assembly and a power supply control circuit; the thermoelectric module comprises an inner surface attached to the surface of a case of the charge and discharge battery and an outer surface exposed to the external environment, and generates a first current when the temperature of the outer surface is higher than that of the inner surface; the input end of the power supply control circuit is connected with the thermoelectric assembly, the output end of the power supply control circuit is connected with the charge-discharge battery, and the power supply control circuit is used for charging the charge-discharge battery by utilizing the current generated by the thermoelectric assembly. The technical scheme of the utility model be the hot junction through being the external environment, the surface temperature of battery is the cold junction, utilizes the electric current that thermoelectric module produced to charge to the battery to reduce the increase of battery capacity decay and battery internal resistance that leads to because of high temperature environment, make the battery can keep higher SOC etc..
Description
Technical Field
The utility model relates to a battery technology field especially relates to a battery device, battery power supply unit and electronic equipment.
Background
Under high temperature environment such as outdoor insolation or indoor car in summer, the self-discharge rate of the battery in the high temperature environment is increased, and the capacity of the battery is rapidly reduced. For some occasions with infrequent use, such as emergency portable charging devices (i.e., charge pal), etc., there may be no power available for use when the user needs to use due to the increased self-discharge rate; in some frequently used occasions, such as a starting battery and a starting and stopping battery of an automobile, the battery capacity of the battery may be further reduced due to high-temperature self-discharge, so that the battery operates in a low State of charge (SOC) to reflect the remaining capacity of the battery, which may lead to a substantial reduction in the service life of the battery. Therefore, it is very meaningful to provide a technical solution to maintain the SOC of the battery as high as possible in a high temperature environment.
SUMMERY OF THE UTILITY MODEL
In view of the above, the present invention is directed to solve the above technical problems and to provide a battery device, a battery power supply device and an electronic apparatus.
An embodiment of the utility model provides a battery device, include: the device comprises a charging and discharging battery, a thermoelectric assembly and a power supply control circuit;
the thermoelectric module comprises an inner surface attached to the surface of a shell of the charge-discharge battery and an outer surface exposed to the external environment, and generates a first current when the temperature of the outer surface is higher than that of the inner surface;
the input end of the power supply control circuit is connected with the thermoelectric assembly, the output end of the power supply control circuit is connected with the charge-discharge battery, and the power supply control circuit is used for charging the charge-discharge battery by utilizing the current generated by the thermoelectric assembly.
Further, in the above battery device, the thermoelectric module generates a second current in a direction opposite to the first current when the temperature of the inner surface is higher than that of the outer surface;
the power supply control circuit comprises a rectifying unit connected with the thermoelectric assembly, and the rectifying unit is used for rectifying the current generated by the thermoelectric assembly and then charging the charging and discharging battery.
Further, in the above battery device, the thermoelectric module includes at least one pair of P-type thermoelectric thin films and N-type thermoelectric thin films, first surfaces of the P-type thermoelectric thin films and the N-type thermoelectric thin films in the same pair are respectively attached to a surface of a case of the charge and discharge battery, and second surfaces of the P-type thermoelectric thin films and the N-type thermoelectric thin films are connected by a conductive material.
Further, in the above battery device, the conductive material is a conductive sheet, and the conductive sheet is attached to the second surface of each of the P-type thermoelectric thin film and the N-type thermoelectric thin film.
Further, in the above battery device, the power supply control circuit includes a voltage boost unit, an input end of the voltage boost unit is connected to the thermoelectric module or connected to the thermoelectric module through the rectifier unit, and an output end of the voltage boost unit is connected to two ends of the charge and discharge battery.
Further, in the above battery device, the charge/discharge battery may be detachably attached to the thermoelectric module.
Another embodiment of the utility model provides a battery power supply unit, include: the thermoelectric module comprises an inner surface and an outer surface, wherein the inner surface is attached to the surface of a shell of the battery, the outer surface is exposed to the external environment, and a first current is generated when the temperature of the outer surface is higher than that of the inner surface;
the input end of the power supply control circuit is connected with the thermoelectric component, and the output end of the power supply control circuit is used for connecting a power supply object; the power supply control circuit is used for supplying power to the power supply object by using the current generated by the thermoelectric component.
Further, in the above battery power supply apparatus, the thermoelectric module generates a second current in a direction opposite to the first current when the temperature of the inner surface is higher than that of the outer surface;
the power supply control circuit comprises a rectifying unit connected with the thermoelectric assembly, and the rectifying unit is used for rectifying the current generated by the thermoelectric assembly and then supplying power to the power supply object.
Further, in the above battery power supply device, the thermoelectric module includes at least one set of a P-type thermoelectric thin film and an N-type thermoelectric thin film, first surfaces of the P-type thermoelectric thin film and the N-type thermoelectric thin film in the same set are respectively attached to a surface of a case of the battery, and second surfaces of the P-type thermoelectric thin film and the N-type thermoelectric thin film are connected by an electrically conductive material.
Another embodiment of the present invention provides an electronic device, including the above battery power supply apparatus.
The embodiment of the utility model has the following advantage:
the utility model discloses technical scheme is through the surface and the design power supply control circuit with thermoelectric module laminating in the battery for when the battery is in high temperature environment, be the hot junction with the external environment promptly, the surface temperature of battery is the cold junction, utilizes the electric current that thermoelectric module produced to charge to the battery, thereby reduces the high temperature environment and leads to the decay of battery capacity and the increase of battery internal resistance, enables the battery and keeps higher SOC and does not influence its use etc..
Drawings
In order to illustrate the technical solution of the present invention more clearly, the attached drawings needed to be used in the embodiments are briefly introduced below, and it should be understood that the following drawings only show some embodiments of the present invention, and therefore should not be considered as limiting the scope of the present invention. Like components are numbered similarly in the various figures.
Fig. 1 shows a schematic structural diagram of a battery device according to an embodiment of the present invention;
fig. 2 is a schematic diagram illustrating an application of a thermoelectric module of a battery device according to an embodiment of the present invention;
fig. 3 shows a schematic diagram of a series connection of membrane modules of a thermoelectric module of a battery device according to an embodiment of the present invention;
fig. 4 shows a schematic diagram of a parallel connection of the membrane modules of the thermoelectric module of the battery device according to the embodiment of the present invention;
fig. 5 is a schematic structural diagram illustrating a power supply control circuit of a battery device according to an embodiment of the present invention;
fig. 6 shows a schematic structural diagram of a battery power supply device according to an embodiment of the present invention.
Description of the main element symbols:
1-a battery device; 10-a battery powered device; 11-a charge-discharge battery; 12-a thermoelectric module; 13-a power supply control circuit; 121-a conductive material; 131-a boosting unit; 132-rectifying unit.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments.
The components of embodiments of the present invention, as 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 present invention, presented in the accompanying drawings, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. Based on the embodiment of the present invention, all other embodiments obtained by the person skilled in the art without creative work belong to the protection scope of the present invention.
Hereinafter, the terms "including", "having", and their derivatives, which may be used in various embodiments of the present invention, are only intended to indicate specific features, numbers, steps, operations, elements, components, or combinations of the foregoing, and should not be construed as first excluding the existence of, or adding to, one or more other features, numbers, steps, operations, elements, components, or combinations of the foregoing.
Furthermore, the terms "first," "second," "third," and the like are used solely to distinguish one from another, and are not to be construed as indicating or implying relative importance.
Unless otherwise defined, all terms (including technical and scientific terms) used herein have the same meaning as commonly understood by one of ordinary skill in the art to which the various embodiments of the present invention belong. The terms (such as those defined in commonly used dictionaries) should be interpreted as having a meaning that is consistent with their contextual meaning in the relevant art and will not be interpreted in an idealized or overly formal sense unless expressly so defined herein in various embodiments of the present invention.
Example 1
Referring to fig. 1, the present embodiment provides a battery device 1, which can be used to solve the problem that the battery capacity is apt to decay rapidly when the rechargeable battery is in an external high-temperature environment.
As shown in fig. 1, the battery device 1 will be described in detail.
In this embodiment, the battery device 1 mainly includes a charge/discharge battery 11, a thermoelectric module 12, and a power supply control circuit 13, wherein the thermoelectric module 12 includes an inner surface attached to a case surface of the charge/discharge battery 11 and an outer surface exposed to the external environment. The input end of the power supply control circuit 13 is connected to the thermoelectric module 12, and the output end thereof is connected to the two ends of the charge/discharge battery 11.
Because the inner surface of the thermoelectric module 12 is attached to the surface of the case of the battery, the temperature of the inner surface is always in equilibrium with the temperature of the surface of the case of the battery; and the external surface exposed to the external environment can be used for sensing the temperature change of the external environment. It will be appreciated that if the temperature of the external environment is different from the temperature of the cell's housing surface, then there will be a temperature difference between the inner and outer surface temperatures of the thermoelectric module 12.
According to the seebeck effect, when the contact points of two different thermoelectric materials are at different temperatures, a voltage difference is generated between the two thermoelectric materials. For a loop of these two pyroelectric materials, when the temperatures of the two contact points are different, a current will appear in the loop, the direction of the current at that time depending on the direction of the temperature gradient. This is because under the temperature gradient, the carriers in the material conductor will move from the hot end to the cold end and accumulate at the cold end, thereby forming a potential difference inside the material.
With the thermoelectric module 12 described above, when the temperature of the outer surface thereof is higher than the temperature of the inner surface thereof, that is, when the temperature of the external environment is higher than the case surface temperature of the charge and discharge battery 11, a first current will be generated in the circuit in which the battery device 1 is located. Furthermore, the power supply control circuit 13 is configured to charge the charge/discharge battery 11 with the first current generated by the thermoelectric module 12.
Preferably, the thermoelectric material in the thermoelectric module 12 is made into a film function device and covered on the surface of the casing of the battery to have a good bonding effect. Exemplarily, as shown in fig. 2, the thermoelectric module 12 includes at least one group of P-type thermoelectric thin films and N-type thermoelectric thin films, first surfaces of the P-type thermoelectric thin films and the N-type thermoelectric thin films in the same group are respectively attached to a surface of the case of the charge and discharge battery 11, and second surfaces of the P-type thermoelectric thin films and the N-type thermoelectric thin films are connected by a conductive material 121. The thermoelectric module 12 includes two extraction electrodes for connecting the thermoelectric module 12 and the power supply control circuit 13. As shown in fig. 2, one extraction electrode is located between the P-type thermoelectric film and the surface of the case of the battery, and the other extraction electrode is located between the N-type thermoelectric film and the surface of the case of the battery.
It should be understood that the number of the film groups composed of the above-described P-type thermoelectric thin films and N-type thermoelectric thin films may be determined according to the actual area size of the battery, etc. When a plurality of thermoelectric thin films are adopted, the thermoelectric thin films can be arranged and attached to the surface of the shell of the battery in a series connection mode or a parallel connection mode.
For example, fig. 3 shows a series connection in which the N-type thermoelectric thin films in the former group and the P-type thermoelectric thin films in the latter group are connected in sequence on the same battery case surface, and a voltage is output from the P-type thermoelectric thin films in the first group and the N-type thermoelectric thin films in the last group, where the output voltage is the sum of the voltages output from the respective groups of the cells. Alternatively, a plurality of membrane modules may be connected in parallel as shown in fig. 4.
As for the conductive material 121, for example, a conductive sheet or the like may be used, and the conductive sheet is attached to the second surfaces of the P-type thermoelectric thin films and the N-type thermoelectric thin films in the same group to form a loop. It should be understood that the thickness of the conductive sheet is not limited in particular, and if the thickness is small, the conductive sheet may be referred to as a conductive film.
In this embodiment, the power supply control circuit 13 is mainly used for charging the charging/discharging battery 11 by using the first current generated by the thermoelectric module 12. Exemplarily, as shown in fig. 1, the power supply control circuit 13 includes a voltage boosting unit 131, an input end of the voltage boosting unit 131 is connected to the thermoelectric module 12, and an output end is connected to two ends of the charge and discharge battery 11.
Generally, when the temperature difference between the external environment and the surface of the battery case is small, the generated current and voltage are also small, and in order to ensure that the charging and discharging battery 11 can be charged normally, the voltage generated by the thermoelectric module 12 can be boosted and stabilized to a voltage meeting the requirement by the boosting unit 131, and then input to the two ends of the battery.
For example, the boosting unit 131 may employ a DC-DC boosting circuit, such as separately-excited Boost boosting, self-excited Boost boosting, and the like. In consideration of the small input voltage of the boosting unit 131 and the relatively fixed charging voltage of the charging and discharging battery 11, it is preferable that the boosting unit 131 employs a self-excited Boost boosting circuit, that is, boosting is realized by using the principles of self-excited oscillation and triode amplification voltage stabilization, which not only has a simple circuit structure but also can reduce the cost and the like.
Alternatively, if there are multiple sets of P-type thermoelectric thin films and N-type thermoelectric thin films connected in series in the thermoelectric module 12, the power supply control circuit 13 may be a voltage stabilizing unit instead of a voltage boosting unit, for example, may be composed of a voltage stabilizing tube, mainly because if there are enough sets of films connected in series, the output voltage may be close to the charging voltage of the charging and discharging battery 11, and then no voltage boosting process is needed.
In another embodiment, in the case where the temperature of the inner surface of the thermoelectric module 12 is higher than the temperature of the outer surface thereof, i.e., when the temperature of the case surface of the charge and discharge battery 11 is higher than the external ambient temperature, the thermoelectric module 12 generates a second current in the opposite direction to the first current. For example, the first current shown in fig. 2 is clockwise, then the second current will be counter-clockwise.
In this case, the power supply control circuit 13 further includes a rectifying unit 132 connected to the thermoelectric module 12, and the rectifying unit 132 is configured to rectify the current generated by the thermoelectric module 12 and charge the charge/discharge battery 11. For example, the rectifying unit 132 may be implemented by a rectifying bridge composed of four discrete diodes or an integrated rectifying chip. For example, as shown in fig. 5, the boosting unit 131 in the power supply control circuit 13 may be connected to the thermoelectric module 12 through the rectifying unit 132, that is, the current generated by the thermoelectric module 12 is firstly passed through the rectifying unit 132 and then input to the boosting unit 131 for boosting.
When the rectifying unit 132 is included, the battery device 1 can utilize the heat energy generated between the external high temperature environment and the battery, or utilize the heat energy generated by the battery with a temperature higher than the external environment to convert the heat energy into electric energy to charge the rechargeable battery. It should be understood that the electricity generated in the two temperature difference conditions can be used not only for charging the rechargeable battery, but also for supplying power to other external loads. For example, the driving device may be used for circulating water, a fan, or the like for driving the charge/discharge battery 11.
Since the thermoelectric material in the thermoelectric module 12 is an insulating material, if the battery is discharged in a large size, considering that the risk of battery accidents may be increased if the heat on the surface of the battery cannot be dissipated in time, the charging and discharging battery 11 is detachably attached to the thermoelectric module 12, for example, the thermoelectric module 12 may be configured like a clamp or a box, so that the thermoelectric module 12 and the charging and discharging battery 11 can be separated. For example, the thermoelectric module 12 may be removed when a battery is used for high current discharge; in other cases, the charging/discharging battery 11 and the thermoelectric module 12 may be attached again.
In the above-described embodiment, the charge and discharge cell 11 refers to a cell or a battery pack that can be subjected to secondary charging, and may include, but is not limited to, a cadmium nickel cell, a hydrogen nickel cell, a lithium ion cell, a secondary alkaline zinc-manganese cell, or the like.
The battery device provided by the embodiment uses the thermoelectric material to use the external environment as the hot end, uses the charge-discharge battery as the cold end, and based on the seebeck effect and the corresponding power supply control circuit, when the external environment is a high-temperature environment, the heat energy generated by the high temperature of the external environment is converted into electricity to charge the battery, so that the surface temperature of the battery can be effectively reduced, the irreversible change of the positive electrode and the negative electrode in the battery can be reduced, the capacity attenuation and the internal resistance increase of the battery caused by the high-temperature environment can be reduced, and the battery can keep a higher SOC and the like for a longer time.
Example 2
Referring to fig. 6, the present embodiment provides a battery-powered device 10, where the battery-powered device 10 includes: a thermoelectric module 12 and a power supply control circuit 13, wherein the thermoelectric module 12 includes an inner surface attached to a case surface of the battery and an outer surface exposed to the external environment; the input end of the power supply control circuit 13 is connected to the thermoelectric module 12, and the output end is used for connecting to a power supply object.
Illustratively, the first electrical current will be generated when the temperature of the outer surface of the thermoelectric assembly 12 is higher than the temperature of the inner surface thereof. At this time, the power supply control circuit 13 supplies power to the power supply target by the current generated by the thermoelectric module 12.
In another embodiment, when the temperature of the thermoelectric module 12 is higher at its inner surface than at its outer surface, a second current is generated in a direction opposite to the first current. In this case, the power supply control circuit 13 includes a rectifying unit connected to the thermoelectric module 12 for rectifying the current generated by the thermoelectric module 12 and supplying power to the power supply target.
Preferably, the thermoelectric module 12 includes at least one set of P-type thermoelectric thin films and N-type thermoelectric thin films, the respective first surfaces of the P-type thermoelectric thin films and N-type thermoelectric thin films in the same set are respectively attached to the surface of the case of the battery, and the respective second surfaces of the P-type thermoelectric thin films and N-type thermoelectric thin films in the same set are connected by the conductive material 121.
In this embodiment, the battery may be a rechargeable battery or an irreversible discharge battery, and for the irreversible battery in an external high-temperature environment, the generated temperature difference may be used to supply power to other loads, such as a fan, circulating water, and an indicator light in the current battery system. It is understood that the powered object may include, but is not limited to, a rechargeable battery, other loads as described above, and the like.
It can be understood that the battery power supply device 10 and the battery are detachable, wherein the thermoelectric module and the power supply control circuit in the battery power supply device 10 correspond to the thermoelectric module and the power supply control circuit in the above embodiment 1, respectively. The alternatives of embodiment 1 described above are equally applicable to this embodiment and will not be described again here.
Another embodiment of the present invention also provides an electronic device including the battery device 1 in embodiment 1 above.
In the embodiments provided in the present application, it should be understood that the disclosed apparatus and method can be implemented in other ways. The apparatus embodiments described above are merely illustrative and, for example, the flowchart and block diagrams in the figures illustrate the architecture, functionality, and operation of possible implementations of apparatus, methods and computer program products according to various embodiments of the present invention.
In addition, each functional module or unit in the embodiments of the present invention may be integrated together to form an independent part, or each module may exist separately, or two or more modules may be integrated to form an independent part.
The above description is only for the specific embodiments of the present invention, but the protection scope of the present invention is not limited thereto, and any person skilled in the art can easily think of the changes or substitutions within the technical scope of the present invention, and all should be covered within the protection scope of the present invention.
Claims (10)
1. A battery device, comprising: the device comprises a charging and discharging battery, a thermoelectric assembly and a power supply control circuit;
the thermoelectric module comprises an inner surface attached to the surface of the case of the charge and discharge battery and an outer surface exposed to the external environment, and generates a first current when the temperature of the outer surface is higher than that of the inner surface;
the input end of the power supply control circuit is connected with the thermoelectric assembly, the output end of the power supply control circuit is connected with the charge-discharge battery, and the power supply control circuit is used for charging the charge-discharge battery by utilizing the current generated by the thermoelectric assembly.
2. The battery device of claim 1, wherein the thermoelectric assembly generates a second current in a direction opposite to the first current when the temperature of the inner surface is higher than the outer surface;
the power supply control circuit comprises a rectifying unit connected with the thermoelectric assembly, and the rectifying unit is used for rectifying the current generated by the thermoelectric assembly and then charging the charging and discharging battery.
3. The battery device according to claim 1 or 2, wherein the thermoelectric module comprises at least one group of P-type thermoelectric thin films and N-type thermoelectric thin films, wherein the first surfaces of the P-type thermoelectric thin films and the N-type thermoelectric thin films in the same group are respectively attached to the surface of the case of the charge and discharge battery, and the second surfaces of the P-type thermoelectric thin films and the N-type thermoelectric thin films are connected through a conductive material.
4. The battery device of claim 3, wherein the electrically conductive material is an electrically conductive sheet that is adhered to the second surface of each of the P-type thermoelectric thin film and the N-type thermoelectric thin film.
5. The battery device according to claim 2, wherein the power supply control circuit comprises a voltage boosting unit, an input end of the voltage boosting unit is connected with the thermoelectric component or is connected with the thermoelectric component through the rectifying unit, and an output end of the voltage boosting unit is connected with two ends of the charging and discharging battery.
6. The battery device of claim 1, wherein the charge and discharge battery is removably attached to the thermoelectric assembly.
7. A battery powered device, comprising: the thermoelectric module comprises an inner surface and an outer surface, wherein the inner surface is attached to the surface of a shell of the battery, the outer surface is exposed to the external environment, and a first current is generated when the temperature of the outer surface is higher than that of the inner surface;
the input end of the power supply control circuit is connected with the thermoelectric component, and the output end of the power supply control circuit is used for connecting a power supply object; the power supply control circuit is used for supplying power to the power supply object by using the current generated by the thermoelectric component.
8. The battery powered device of claim 7, wherein the thermoelectric assembly generates a second current in a direction opposite to the first current when the temperature of the inner surface is higher than the outer surface;
the power supply control circuit comprises a rectifying unit connected with the thermoelectric assembly, and the rectifying unit is used for rectifying the current generated by the thermoelectric assembly and then supplying power to the power supply object.
9. The battery-powered device of claim 7 or 8, wherein the thermoelectric module comprises at least one set of P-type thermoelectric thin films and N-type thermoelectric thin films, wherein the first surfaces of the P-type thermoelectric thin films and the N-type thermoelectric thin films in the same set are respectively attached to the surface of the casing of the battery, and the second surfaces of the P-type thermoelectric thin films and the N-type thermoelectric thin films are connected by an electrically conductive material.
10. An electronic device characterized by comprising the battery device according to any one of claims 1 to 6.
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| CN202020388395.8U CN211790897U (en) | 2020-03-24 | 2020-03-24 | Battery device, battery power supply device, and electronic apparatus |
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| CN202020388395.8U CN211790897U (en) | 2020-03-24 | 2020-03-24 | Battery device, battery power supply device, and electronic apparatus |
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| CN113097586A (en) * | 2021-03-16 | 2021-07-09 | 电子科技大学 | Intelligent thermoelectric-battery integrated structure |
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| CN113097586A (en) * | 2021-03-16 | 2021-07-09 | 电子科技大学 | Intelligent thermoelectric-battery integrated structure |
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