CN212676345U

CN212676345U - Solar street lamp lithium battery applied at low temperature

Info

Publication number: CN212676345U
Application number: CN202020891126.3U
Authority: CN
Inventors: 朱明海; 吴战宇; 董志成
Original assignee: Jiangsu Huafu Storage New Technology Development Co ltd; Huafu Jiangsu Lithium Electricity New Technology Co ltd
Current assignee: Jiangsu Huafu Storage New Technology Development Co ltd; Huafu Jiangsu Lithium Electricity New Technology Co ltd
Priority date: 2020-05-25
Filing date: 2020-05-25
Publication date: 2021-03-09
Anticipated expiration: 2030-05-25

Abstract

The utility model relates to a low-temperature application solar street lamp lithium battery, which comprises a lithium battery module, a protective plate, a heating control circuit and a temperature probe; one end of the temperature probe is connected with the heating control circuit, and the other end of the temperature probe is inserted into the lithium battery module; the lithium battery module comprises a plurality of battery cores and a plurality of heating sheets, and the battery cores and the heating sheets are arranged at intervals; the protection board is connected with the battery core to form a charging and discharging loop, and the heating control circuit is integrated at the protection board and connected with the temperature probe and the heating sheet to form a heating loop. The utility model discloses, combine temperature probe, protection shield and heating control circuit, implement the inside temperature of control lithium cell, prevent that it from appearing the low temperature phenomenon, and then avoided lithium battery capacity, the disconnected cliff formula decay of life-span, prick the diaphragm even and arouse the lithium cell short circuit, cause the incident. Meanwhile, the heating sheet is attached to the outside of the battery core, so that the battery core is heated uniformly, and the heat utilization rate is improved.

Description

Solar street lamp lithium battery applied at low temperature

Technical Field

The utility model relates to a solar street lamp lithium cell is used to low temperature belongs to lithium cell technical field.

Background

The solar street lamp has the advantages of environmental protection, energy conservation, convenient construction and maintenance, high safety and the like, is widely applied to non-arterial road illumination in parks, suburbs of cities, new rural areas and other areas, and particularly makes a contribution to solving the problem of non-electric road illumination in western regions, frontier defense, islands and the like. The solar street lamp is used in an outdoor environment, a lead-acid storage battery or a lithium battery is used as energy storage equipment, and the lithium battery has the electrical performance characteristics and advantages of strong over-discharge recovery capability, high charging and discharging efficiency, energy conservation, environmental protection, long service life and the like, and is gradually replacing the lead-acid battery.

However, the soft ribs of the lithium battery are difficult to charge in an environment below 0 ℃, and particularly, the lithium iron phosphate battery can hardly be charged. The lithium ion battery is charged in an environment below 0 ℃, the chemical activity of lithium ions is reduced in the reaction process, the migration speed is slowed, irreversible metal lithium dendrites are formed on the surface of a negative electrode before the lithium ion battery is embedded into an electrode, the capacity and the service life of the lithium battery are attenuated in a cliff mode, even a diaphragm is punctured, the lithium battery is short-circuited, and safety accidents are caused; heating energy is obtained from the lithium battery, the lighting time of the solar street lamp is shortened, the energy utilization rate of the solar component is low, and the configuration cost of the solar street lamp system is increased; the lithium battery module adopts the heating mode all around of cylinder box hat electricity core, and heat distribution is inhomogeneous and heat utilization rate is low, and lithium cell solar street lamp has received the restriction in the application in northern low temperature area. Therefore, a low temperature application solar street lamp lithium battery is proposed to solve the above problems.

SUMMERY OF THE UTILITY MODEL

In order to solve the technical problem, the utility model provides a solar street lamp lithium cell is used to low temperature, its concrete technical scheme as follows: the lithium battery comprises a lithium battery module, a protection plate, a temperature probe, a heat preservation layer and a lithium battery shell, wherein the lithium battery module, the protection plate, the temperature probe and the heat preservation layer are all installed inside the lithium battery shell, the lithium battery module comprises an electric core and a heating plate, the electric core comprises a first electric core, a second electric core and a third electric core, the heating plate comprises a first heating plate and a second heating plate, the first heating plate is pasted between the first electric core and the second electric core, the second heating plate is pasted between the second electric core and the third electric core, the temperature probe is arranged in the middle position of an electrode of the electric core, the heat preservation layer is pasted outside the lithium battery module, the heating control circuit is integrated on the protection plate, the anode of the lithium battery is directly led out from the anode of the lithium battery module, the P-contact of the protection plate is connected with the cathode of the lithium battery, the B-, The anode of the second heating sheet, the H-contact is connected with the first heating sheet and the cathode of the second heating sheet, and the NTC/NIC contact of the heating control circuit is respectively connected with the sampling line of the temperature probe.

The concrete during operation: only when solar photovoltaic power generation is carried out in the daytime, the heating control circuit detects the temperature of the lithium battery module through the temperature probe, when the detected temperature of the lithium battery module is lower than 0 +/-1 ℃, the heating loop is started, the solar photovoltaic power generation energy is preferentially supplied to the first heating sheet and the second heating sheet for heating, and the energy of the lithium battery module is not consumed; when the temperature of the lithium battery module rises to 6 +/-1 ℃, the heating loop is disconnected, and the solar photovoltaic power generation energy is supplied to charge the lithium battery module.

Further, the first battery cell, the second battery cell and the third battery cell are connected in series, and the positive electrode is NMC 433. The NMC433 is the weight ratio of the nickel-manganese-cobalt ternary material to the nickel-manganese-cobalt ternary material of 4:3: 3.

Furthermore, the first battery cell, the second battery cell and the third battery cell adopt a soft package flat structure of an aluminum-plastic film.

Furthermore, the first heating sheet and the second heating sheet are connected in parallel, the flexible film is composed of a resistance element generated by etching a metal foil and a polyimide insulating layer, the flexible film has a single-sided adhesive sticking function, the resistance value of a single sheet is 12 omega +/-1 omega at normal temperature, the thickness is 0.12 mm-0.15 mm, and the length and the width can be customized according to the size of the battery cell.

Furthermore, the heat preservation layer is made of flame-retardant EVA heat preservation cotton, and the thickness of the heat preservation layer is 10mm +/-1 mm. Lithium battery case protection grade IP 67.

Furthermore, the heating control circuit is integrated on the protection plate, the voltage range is 9V-12.6V, the heating loop can be started only when solar photovoltaic power generation is carried out in the daytime and the temperature of the lithium battery module is lower than 0 +/-1 ℃, the solar photovoltaic power generation energy is preferentially supplied to the first heating plate and the second heating plate for heating, and the energy of the lithium battery module is not consumed; when the temperature of the lithium battery module rises to 6 +/-1 ℃, the heating loop is disconnected, and the solar photovoltaic power generation energy is supplied to charge the lithium battery module.

The utility model has the advantages that: the utility model discloses, combine temperature probe, protection shield and heating control circuit, implement the inside temperature of control lithium cell, prevent that it from appearing the low temperature phenomenon, and then avoided lithium battery capacity, the disconnected cliff formula decay of life-span, prick the diaphragm even and arouse the lithium cell short circuit, cause the incident. Meanwhile, the heating sheet is attached to the outside of the battery core, so that the battery core is heated uniformly, and the heat utilization rate is improved.

Drawings

FIG. 1 is a schematic view of the overall structure of the present invention;

FIG. 2 is an exploded view of the overall structure of the present invention;

fig. 3 is a schematic view of the application of the present invention.

In the figure: 1-lithium battery module, 2-first battery cell, 3-second battery cell, 4-third battery cell, 5-first heating plate, 6-second heating plate, 7-insulating layer, 8-protective plate, 9-temperature probe, 10-lithium battery shell and 11-heating control circuit.

Detailed Description

The present invention will now be described in further detail with reference to the accompanying drawings. These drawings are simplified schematic drawings and illustrate the basic structure of the present invention only in a schematic manner, and thus show only the components related to the present invention.

As shown in fig. 1 and 2, the present invention includes a lithium battery case 10. The lithium battery shell 10 is internally provided with a lithium battery module 1, a protection plate 8, a temperature probe 9 and a heating control circuit 11. Lithium battery module 1 includes three battery core, is first electric core 2, second electric core 3 and third electric core 4 respectively, still includes two heating plates, is first heating plate 5 and second heating, 6 respectively. A first heating sheet 5 is pasted between the first battery cell 2 and the second battery cell 3, and a second heating sheet 6 is pasted between the second battery cell 3 and the third battery cell 4. Lithium battery module 1 is placed in lithium battery shell 10 bottom, and lithium battery module 1's outside is pasted with heat preservation 7. The top of lithium battery module 1 is equipped with protection shield 8, heating control circuit 11 is integrated on protection shield 8.

The lithium battery module 1 also comprises a module anode B + and a module cathode B-, the module anode B + is directly led out to penetrate through the lithium battery shell 10 to form a lithium battery anode P +, the module cathode B-is connected with a B-contact of the protection plate 8, and the lithium battery cathode P-extends out of the lithium battery shell 10 and is connected with the P-contact of the protection plate 8. The first heating plate 5 and the second heating plate 6 are respectively provided with two connecting wires, one connecting wire is connected with an H + contact of the heating control circuit 11, the other connecting wire is connected with an H-contact, and the NTC/NIC contact of the heating control circuit is respectively connected with a sampling wire of the temperature probe 9. The first battery cell 2, the second battery cell 3 and the third battery cell 4 are connected in series. The first heating plate 5 and the second heating plate 6 are connected in parallel.

As shown in fig. 3, which is an application schematic diagram of the present application, the solar street lamp electrical system is composed of 4 parts, such as a solar module, a storage battery, a controller, and an LED light source, etc., wherein the solar module converts solar energy into dc electrical energy based on the photovoltaic effect of a semiconductor during daytime, and the dc electrical energy is stored in the storage battery through the solar controller. The controller collects light-operated or time-controlled turn-on signals at night, the storage battery supplies power to the LED light source through the solar controller, the lighting function is achieved, the light source load brightness and power can be automatically adjusted according to the density of the stream of people and the stream of vehicles, and energy-saving control is achieved intelligently. And similarly, the storage battery and the LED light source loop are cut off by the light control or time control turn-off signal of the controller, so that the light-off function is realized. The whole switching process is completed by a light control and time control switch circuit of a built-in singlechip of the controller.

It will be understood by those skilled in the art that, 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 this application belongs. It will be further understood that terms, such as those defined in commonly used dictionaries, should be interpreted as having a meaning that is consistent with their meaning in the context of the prior art and will not be interpreted in an idealized or overly formal sense unless expressly so defined herein.

The meaning of "and/or" as used herein is intended to include both the individual components or both.

The term "connected" as used herein may mean either a direct connection between components or an indirect connection between components via other components.

In light of the foregoing, it will be apparent to those skilled in the art from this disclosure that various changes and modifications can be made without departing from the spirit and scope of the invention. The technical scope of the present invention is not limited to the content of the specification, and must be determined according to the scope of the claims.

Claims

1. The utility model provides a solar street lamp lithium cell is used to low temperature which characterized in that: the lithium battery protection device comprises a lithium battery module (1), a protection board (8), a heating control circuit (11) and a temperature probe (9); the protection plate (8) is positioned above the lithium battery module (1), the heating control circuit (11) is integrated on the protection plate (8), one end of the temperature probe (9) is connected with the heating control circuit (11), and the other end of the temperature probe is inserted into the lithium battery module (1); the lithium battery module (1) comprises a plurality of battery cores and a plurality of heating sheets, wherein the battery cores and the heating sheets are arranged at intervals; the protection plate (8) is connected with the battery cell to form a charge-discharge loop; and the heating control circuit (11) is connected with the temperature probe (9) and the heating sheet to form a heating loop.

2. The low temperature application solar street light lithium battery as claimed in claim 1, wherein: still include lithium battery case (10), lithium battery module (1), protection shield (8), heating control circuit (11) and temperature probe (9) all set up inside lithium battery case (10).

3. The low temperature application solar street light lithium battery as claimed in claim 1, wherein: the lithium battery module is characterized by further comprising a heat insulation layer (7), wherein the heat insulation layer (7) is pasted outside the lithium battery module (1).

4. The low temperature application solar street light lithium battery as claimed in claim 1, wherein: the battery cell comprises a first battery cell (2), a second battery cell (3) and a third battery cell (4), the heating plate comprises a first heating plate (5) and a second heating plate (6), the first heating plate (5) is pasted between the first battery cell (2) and the second battery cell (3), and the second heating plate (6) is pasted between the second battery cell (3) and the third battery cell (4).

5. The low temperature application solar street light lithium battery as claimed in claim 4, wherein: the temperature probe (9) is arranged in the middle of the second battery cell (3).

6. The low temperature application solar street light lithium battery as claimed in claim 4, wherein: the lithium battery module (1) comprises a module anode (B +) and a module cathode (B-), and the protection plate (8) comprises a B-contact and a P-contact; the positive pole (P +) of the lithium battery is directly led out from the positive pole (B +) of the module, a B-contact of the protection plate (8) is connected with a negative pole (B-) of the module, and a negative pole (P-) of the lithium battery is connected with a P-contact of the protection plate (8); the heating control circuit (11) comprises an H + contact, an H-contact and an NTC/NIC contact, and the first heating sheet (5) and the second heating sheet (6) are connected between the H + contact and the H-contact; the NTC/NIC contact is connected to a temperature probe (9).

7. The low temperature application solar street light lithium battery as claimed in claim 1, wherein: the plurality of battery cells are connected in series, and the positive electrode is made of NMC 433.

8. The low temperature application solar street light lithium battery as claimed in claim 1, wherein: the battery cell is of a soft package flat structure of an aluminum plastic film; the heating plates are connected in parallel, and the resistance elements generated by etching the metal foil and the polyimide insulating layer are selected as the heating plates to form the flexible film.

9. The low temperature application solar street light lithium battery as claimed in claim 2, wherein: the lithium battery shell (10) has a protection rating of IP 67.

10. The low temperature application solar street light lithium battery as claimed in claim 1, wherein: the heating control circuit (11) is integrated on the protective plate (8), the voltage range is 9-12.6V, solar photovoltaic power generation is carried out in the daytime, the temperature of the lithium battery module (1) is lower than 0 +/-1 ℃, a heating loop is started, and the solar photovoltaic power generation energy is supplied to the heating sheet for heating; when the temperature of the lithium battery module (1) rises to 6 +/-1 ℃, the heating loop is disconnected, and the solar photovoltaic power generation energy is supplied to the lithium battery module (1) for charging.