CN211455907U - Battery cell module and battery system - Google Patents
Battery cell module and battery system Download PDFInfo
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- CN211455907U CN211455907U CN202020331291.3U CN202020331291U CN211455907U CN 211455907 U CN211455907 U CN 211455907U CN 202020331291 U CN202020331291 U CN 202020331291U CN 211455907 U CN211455907 U CN 211455907U
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- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
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Abstract
The utility model provides an electricity core module and battery system, electricity core module includes: n battery cells, wherein N is a positive integer; the resistance curing film is independently coated on each battery cell, and when N is equal to 1, a first electrode and a second electrode are led out of the resistance curing film on the battery cells; when N is larger than 1, the resistance curing films on the N battery cells are connected in series, the first terminal is led out from the resistance curing film at the head position, and the second terminal is led out from the resistance curing film at the tail position; the heating circuit comprises a first output end and a second output end, when N is equal to 1, the first output end is connected with the first electrode, and the second output end is connected with the second electrode; when N is greater than 1, the first output terminal is connected to the first terminal, and the second output terminal is connected to the second terminal. According to the utility model discloses electric core module, electric core surface coating resistance curing membrane, its adhesive force is strong, the pliability is good, heat conduction efficiency is high, the heating homogeneity is good, preparation simple process.
Description
Technical Field
The utility model relates to a lithium cell technical field, concretely relates to electricity core module and battery system.
Background
From the temperature characteristics of the lithium ion battery, when the lithium ion battery is charged in a low-temperature environment, the capacity release is low, the battery negative electrode is easy to precipitate in the form of Li + metallic lithium, and lithium dendrites are formed, the growing lithium dendrites have the risk of puncturing the isolation film to cause short circuit of the battery, and the reaction is irreversible.
In order to avoid the risk, the lithium battery needs to be thermally managed in a low-temperature environment so as to ensure that the lithium battery can be efficiently, reliably and quickly charged and discharged. At present, the conventional heating method is to arrange PTC Thermistors (PTC) on the side, surface and bottom of the battery cell for heating. However, in the heating process, if the PTC is arranged on the side surface and the bottom of the battery cell, the contact area between the battery cell and the PTC is small, the heat conduction efficiency is low, the heating time is long, the temperature difference between different positions of the battery cell is large, and the heating uniformity is difficult to ensure; and if the PTC is arranged on the surface of the battery cell, the problems of increased PTC number and cost, thick PTC thickness, large volume, high design difficulty and the like exist, and the problems of high hardness, large internal stress, low energy consumption conversion rate and the like also exist in the PTC.
SUMMERY OF THE UTILITY MODEL
In view of this, the utility model provides an electricity core module and battery system to solve among the prior art the big scheduling problem of the heat conduction efficiency of electricity core heating structure low, the heating homogeneity is poor, the design preparation degree of difficulty.
In order to solve the technical problem, the utility model discloses a following technical scheme:
an embodiment of the utility model provides an electric core module, include:
n battery cells, wherein N is a positive integer;
the resistance curing film is independently coated on each electric core, and when N is equal to 1, a first electrode and a second electrode are led out of the resistance curing film on the electric core; when N is larger than 1, the resistance curing films on the N battery cells are connected in series, a first terminal is led out from the resistance curing film at the head position, and a second terminal is led out from the resistance curing film at the tail position;
the heating circuit comprises a first output end and a second output end, when N is equal to 1, the first output end is connected with the first electrode, and the second output end is connected with the second electrode; and when the N is larger than 1, the first output end is connected with the first terminal, and the second output end is connected with the second terminal.
Optionally, the resistance curing film is an electric heating coating curing film.
Optionally, the thickness of the resistance curing film is 0.05 mm-1 mm.
Optionally, the heating circuit further includes a first input terminal and a second input terminal, and the first input terminal and the second input terminal are used for connecting a power supply.
Optionally, the power supply is the N battery cells, and when N is equal to 1, the first input end is connected to the positive electrode of the battery cell, and the second input end is connected to the negative electrode of the battery cell; when N is larger than 1, the N battery cells are connected in series, and two ends of the N battery cells connected in series are respectively connected with the first input end and the second input end.
Optionally, the power supply is an external power supply, the first input end is connected to a first power end of the external power supply, and the second input end is connected to a second power end of the external power supply.
Optionally, the heating circuit further comprises at least one relay for controlling the heating circuit to be switched on or off.
Optionally, the number of the relays is two, one of the relays is connected between the first input end and the first output end, and the other relay is connected between the second input end and the second output end.
Optionally, the heating circuit further comprises a fuse connected in series between the first input terminal and the first output terminal.
An embodiment of another aspect of the present invention further provides a battery system, which includes the battery cell module as described in any one of the above embodiments.
The utility model discloses above-mentioned technical scheme's beneficial effect as follows:
according to the utility model discloses electric core module, electric core surface coating resistance curing membrane, its adhesive force is strong, the pliability is good, heat conduction efficiency is high, the heating homogeneity is good, preparation simple process.
Drawings
Fig. 1 is a schematic structural diagram of an electrical core and a resistance cured film thereon in an embodiment of the present invention;
fig. 2 is a schematic diagram of the connection between the heating circuit and the battery cell and between the heating circuit and the resistance curing film in the embodiment of the present invention.
Detailed Description
In order to make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the drawings of the embodiments of the present invention are combined below to clearly and completely describe the technical solution of the embodiments of the present invention. It is to be understood that the embodiments described are only some of the embodiments of the present invention, and not all of them. All other embodiments, which can be derived from the description of the embodiments of the present invention by a person skilled in the art, are within the scope of the present invention.
When the lithium battery is in a low-temperature environment, the lithium battery needs to be subjected to heat management so as to ensure that the lithium battery can be charged and discharged efficiently, reliably and quickly. At present, the conventional heating method is to arrange a PTC Thermistor (PTC) on the side, surface and bottom of the battery cell for heating. However, in the heating process, if the PTC is arranged on the side surface and the bottom of the battery cell, the contact area between the battery cell and the PTC is small, the heat conduction efficiency is low, the heating time is long, the temperature difference between different positions of the battery cell is large, and the heating uniformity is difficult to ensure; and if the PTC is arranged on the surface of the battery cell, the problems of increased PTC number and cost, thick PTC thickness, large volume, high design difficulty and the like exist, and the problems of high hardness, large internal stress, low energy consumption conversion rate and the like also exist in the PTC.
Therefore, the embodiment of the utility model provides an electricity core module, electricity core module can include:
the resistance curing film 12 is independently coated on each of the battery cells 11, and when N is equal to 1, a first electrode 131 and a second electrode 132 are led out from the resistance curing film 12 on the battery cell 11; when N is greater than 1, the resistance curing films 12 on the N battery cells 11 are connected in series, a first terminal is led out from the resistance curing film 12 at the head, and a second terminal is led out from the resistance curing film 12 at the tail;
a heating circuit comprising a first output terminal connected to the first electrode 131 and a second output terminal connected to the second electrode 132 when N is equal to 1; and when the N is larger than 1, the first output end is connected with the first terminal, and the second output end is connected with the second terminal.
That is to say, the battery cell module in the embodiment of the present invention includes at least one battery cell 11, each battery cell 11 is independently coated with the resistance cured film 12, the pattern of the resistance cured film 12 coated on the surface of the battery cell 11 can be adjusted according to actual requirements, and the resistance cured film 12 can cover part of the surface of the battery cell 11, and can also cover the whole surface of the battery cell 11; preferably, for example, if the battery cell 11 is in a rectangular parallelepiped shape, the resistance cured film 12 may be coated on a larger surface of the battery cell 11, so as to ensure a certain heating area and avoid cost increase and overlarge battery cell module volume caused by all coating; when N is greater than 1, pile up the range mutually between the electric core 11, then resistance curing membrane 12 can coat in any of two faces of adjacent electric core 11 laminating mutually, and one deck resistance curing membrane 12 can heat the binding face of two adjacent electric cores 11 from this to improve heating efficiency, practice thrift the membrane cost of making, reduce the volume of electric core module.
In the embodiment of the present invention, the battery cell module further includes a heating circuit, the heating circuit is used for being connected with the resistance cured film 12 to enable the resistance cured film 12 to be electrified and generate heat, the heating circuit includes a first output end and a second output end, when N equals 1, that is, when there is only one battery cell 11 in the battery cell module, it means that there is only one resistance cured film 12, a first electrode 131 and a second electrode 132 are led out from the resistance cured film 12 on the surface of the battery cell 11, the first output end of the heating circuit is connected with the first electrode 131, and the second output end is connected with the second electrode 132, therefore, when the heating circuit can output current to pass through the resistance cured film 12, the battery cell 11 is heated; preferably, the first electrode 131 and the second electrode 132 may be respectively located at two points of the resistive cured film 12 that are far away from each other, so as to ensure heating uniformity; when N is greater than 1, that is, when there is more than one cell 11 in the cell module, it means that there is more than one resistance curing film 12, and in order to conveniently utilize the heating circuit to perform on/off control on multiple resistance curing films 12 at the same time, the resistance curing films 12 on N cells 11 are connected in series (one resistance curing film 12 is equivalent to one resistance), and the resistance curing film 12 located at the head of the series part leads out a first terminal, and the resistance curing film 12 located at the tail leads out a second terminal (actually, the head and the tail are relative, when one end of the series part is the head, the other end is the tail, or vice versa), the first output end of the heating circuit is connected with the first terminal, and the second output end is connected with the second terminal, so that the heating circuit can simultaneously energize the resistance curing films 12 on all the cells 11; of course, the embodiment of the utility model provides an in, resistance curing membrane 12 on N electric core 11 also can be connected with heating circuit alone, perhaps resistance curing membrane 12 on several electric core 11 is connected with heating circuit again after establishing ties, and its specific connection condition is no longer repeated here one by one.
The embodiment of the utility model provides an in, adopt the coating of electricity to generate heat on at least one face of electric core 11 during resistance curing membrane 12, treat that it forms after solidifying, the embodiment of the utility model provides an electricity generate heat coating specifically adopts graphite-carbon black series's non-metal thick film type conducting material, resistance curing membrane 12 can generate heat after the circular telegram to heat electric core 11, and adopt electricity to generate heat coating preparation resistance curing membrane 12 and have preparation simple process, the pattern shape of resistance curing membrane 12 who makes is various, adhesive force is strong, the pliability is good, heat conduction efficiency is high, energy conversion is high, thickness is thin, small, heating uniformity is good, material and preparation cost numerous advantages such as low. The coating process is simple, only need place electric core 11 in automatic coating machine frock clamp, install the copper sheet electrode additional to set up the relevant setup parameter of automatic coating machine, electric core 11 surface alright even coating electricity generate heat the coating, the coating can be prepared into various patterns and the resistance curing membrane 12 of different power (mainly through the thickness of adjustment coating), makes its temperature that generates heat in the within range of design, and the coating is accomplished the back, moves to fixed region and places to the solidification can. Preferably, the embodiment of the utility model provides an in 12 thickness of resistance curing membrane can set up to 0.05mm ~ 1mm to avoid the rete too thick and lead to electric core module volume increase too much when guaranteeing certain heating efficiency.
In other embodiments of the present invention, the heating circuit further includes a first input terminal and a second input terminal, the first input terminal and the second input terminal are used for connecting the power supply, that is, the first input terminal and the second input terminal of the heating circuit are connected to the power supply, and output current to the resistance curing film 12 through the first output terminal and the second output terminal.
In some embodiments of the present invention, the power supply source may be N of the electric cores 11, that is, N electric cores 11 energize the resistance cured film 12 to generate heat, at this time, if N is 1, that is, in the case of only one electric core 11, the first input end is connected to the positive electrode of the electric core 11, and the second input end is connected to the negative electrode of the electric core 11, so that the electric core 11 discharges to heat the resistance cured film 12 and then heat the electric core 11; if N is greater than 1, that is, in the case of more than one battery cell 11, the N battery cells 11 are connected in series to form an internal power supply, and then both ends of the N battery cells 11 connected in series are respectively connected to the first input end and the second input end to ensure that sufficient current is output to ensure the heating efficiency of the resistance cured film 12.
In other embodiments of the present invention, the power supply is an external power supply, the first input terminal of the heating circuit is connected to the first power terminal of the external power supply, and the second input terminal is connected to the second power terminal of the external power supply, so that the external power supply is used to connect the heating circuit to energize the resistor-curing film 12 to generate heat. The external power supply can be alternating current or direct current.
Preferably, the embodiment of the utility model provides a power supply both can be N electric core 11, also can be external power supply, also there are two kinds of connection structure of foretell coexistence simultaneously, to make it heat electric core 11 to resistance curing membrane 12 circular telegram with external power supply under the circumstances that has external power supply, practice thrift the electric quantity in the electric core 11, and do not utilize electric core 11 self electric quantity to make it heat electric core 11 to resistance curing membrane 12 circular telegram under external power supply's the circumstances, two kinds of circular telegram modes can switch over each other.
The embodiment of the utility model provides an in, in order to realize the control of resistance curing membrane 12 break/break, heating circuit still including being used for controlling at least one relay that heating circuit switched on or turn-off, the relay is established ties in heating circuit to conveniently realize the control heating and stop heating. Preferably, to reduce the risk of sticking of the relays, the heating circuit comprises two relays, wherein the first relay 211 is connected between the first input and the first output of the heating circuit and the second relay 212 is connected between the second input and the second output.
The utility model discloses an in some embodiments, heating circuit still includes fuse 22, fuse 22 establishes ties in heating circuit, specifically, fuse 22 concatenate in first input with between the first output to can the quick fusing separation when preventing that heating circuit is unusual or short circuit, in order to ensure electric core 11's safety.
The utility model discloses an in other embodiments, heating circuit can be controlled by battery management system to heating process to resistance curing membrane 12 carries out whole control and control, in order to guarantee the fail safe nature when electric core 11 heats.
According to the utility model discloses electric core module, through applying paint with a brush on electric core surface with electricity generating heat, have that adhesive force is strong, the pliability is good, heat conduction efficiency is high, energy conversion is high, thickness is thin small, heating homogeneity is good, material and preparation cost low grade advantage.
The utility model provides a further aspect embodiment provides a battery system, battery system includes the electric core module in above-mentioned arbitrary embodiment, because the electric core module in above-mentioned embodiment has that adhesive force is strong, the pliability is good, heat conduction efficiency is high, energy conversion is high, thickness is thin small, heating uniformity is good, material and preparation cost advantage such as low, consequently the utility model provides an in embodiment battery system also correspond and have these advantages, no longer describe herein.
The foregoing is a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, a plurality of improvements and decorations can be made without departing from the principle of the present invention, and these improvements and decorations should also be regarded as the protection scope of the present invention.
Claims (10)
1. The utility model provides a battery cell module which characterized in that includes:
n battery cells, wherein N is a positive integer;
the resistance curing film is independently coated on each electric core, and when N is equal to 1, a first electrode and a second electrode are led out of the resistance curing film on the electric core; when N is larger than 1, the resistance curing films on the N battery cells are connected in series, a first terminal is led out from the resistance curing film at the head position, and a second terminal is led out from the resistance curing film at the tail position;
the heating circuit comprises a first output end and a second output end, when N is equal to 1, the first output end is connected with the first electrode, and the second output end is connected with the second electrode; and when the N is larger than 1, the first output end is connected with the first terminal, and the second output end is connected with the second terminal.
2. The battery cell module of claim 1, wherein the resistive cured film is an electrically exothermic coating cured film.
3. The battery cell module of claim 1, wherein the thickness of the cured resistive film is 0.05mm to 1 mm.
4. The battery cell module of claim 1, wherein the heating circuit further comprises a first input terminal and a second input terminal, and the first input terminal and the second input terminal are used for connecting a power supply.
5. The battery cell module of claim 4, wherein the power supply source is the N battery cells, and when N is equal to 1, the first input terminal is connected to a positive electrode of the battery cell, and the second input terminal is connected to a negative electrode of the battery cell; when N is larger than 1, the N battery cells are connected in series, and two ends of the N battery cells connected in series are respectively connected with the first input end and the second input end.
6. The battery cell module of claim 4, wherein the power supply is an external power supply, the first input end is connected to a first power end of the external power supply, and the second input end is connected to a second power end of the external power supply.
7. The battery cell module of claim 4, wherein the heating circuit further comprises at least one relay for controlling the heating circuit to turn on or off.
8. The battery cell module of claim 7, wherein the number of the relays is two, one of the relays is connected between the first input terminal and the first output terminal, and the other relay is connected between the second input terminal and the second output terminal.
9. The cell module of claim 4, wherein the heating circuit further comprises a fuse connected in series between the first input and the first output.
10. A battery system comprising the cell module of any one of claims 1-9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020331291.3U CN211455907U (en) | 2020-03-17 | 2020-03-17 | Battery cell module and battery system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020331291.3U CN211455907U (en) | 2020-03-17 | 2020-03-17 | Battery cell module and battery system |
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| CN211455907U true CN211455907U (en) | 2020-09-08 |
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| CN202020331291.3U Active CN211455907U (en) | 2020-03-17 | 2020-03-17 | Battery cell module and battery system |
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