CN117317453A - Lithium ion battery pack with high-power heating function - Google Patents
Lithium ion battery pack with high-power heating function Download PDFInfo
- Publication number
- CN117317453A CN117317453A CN202311320793.0A CN202311320793A CN117317453A CN 117317453 A CN117317453 A CN 117317453A CN 202311320793 A CN202311320793 A CN 202311320793A CN 117317453 A CN117317453 A CN 117317453A
- Authority
- CN
- China
- Prior art keywords
- heating
- battery pack
- lithium ion
- parallel
- socket
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 238000010438 heat treatment Methods 0.000 title claims abstract description 80
- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 title claims abstract description 22
- 229910001416 lithium ion Inorganic materials 0.000 title claims abstract description 22
- 238000007599 discharging Methods 0.000 claims abstract description 10
- 230000001681 protective effect Effects 0.000 claims description 2
- 238000005070 sampling Methods 0.000 claims description 2
- 230000006698 induction Effects 0.000 abstract description 2
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 description 3
- 229910052744 lithium Inorganic materials 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 230000003446 memory effect Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000013021 overheating Methods 0.000 description 1
- 230000008054 signal transmission Effects 0.000 description 1
Classifications
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- 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
- H01M10/05—Accumulators with non-aqueous electrolyte
- H01M10/052—Li-accumulators
- H01M10/0525—Rocking-chair batteries, i.e. batteries with lithium insertion or intercalation in both electrodes; Lithium-ion batteries
-
- 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
- H01M10/63—Control systems
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/50—Current conducting connections for cells or batteries
- H01M50/502—Interconnectors for connecting terminals of adjacent batteries; Interconnectors for connecting cells outside a battery casing
Abstract
The invention provides a lithium ion battery pack with high-power heating; the battery pack module comprises a plurality of single lithium ion batteries, wherein the same number of single lithium ion batteries are connected in series and then connected in parallel, the anode after being connected in parallel is connected with an anode discharging socket and an anode charging socket, and the cathode after being connected in parallel is connected with a cathode discharging socket and a cathode charging socket; the heating module comprises a plurality of heating belts which are uniformly arranged around the battery pack, and each heating belt is respectively connected with a temperature relay in series. The invention adopts the grouping parallel temperature control mode of the heating belt, even if the heating loop is successively switched on and off, the single-path heating current is kept unchanged due to the parallel mode, the problem that high-power heating cannot be realized due to the over-current limit of the temperature relay is solved, and the invention has the advantages of fewer components, sensitive induction, high reliability and adaptability to high-power heating.
Description
Technical Field
The invention relates to a lithium ion battery pack with high-power heating.
Background
The lithium ion battery has the advantages of high energy density, good cycle performance, no memory effect, low self-discharge rate, good environmental compatibility and the like, and is widely applied to the fields of aviation, aerospace, electric vehicles, electric tools and the like. The lithium ion battery is often applied in the environment with extremely low temperature, and in order to ensure the normal output of the battery performance, a heating system is required to be designed in the battery pack to heat the battery stack, wherein the heating system mainly comprises a heating belt and a temperature control device, the heating voltage is usually 28V, and the heating power is related to factors such as the weight of the battery stack, the heating temperature, the heating time and the like. The heating temperature needs to be controlled by a temperature control device, and when the temperature is heated to a set temperature value, a heating loop is cut off in time, so that the safety problem of the battery stack caused by overheating is avoided. The temperature control device is generally in two modes, one is to monitor the temperature of the battery through a temperature sensor or a thermistor and transmit temperature information to a heating control module, when the temperature reaches a set value, the control module cuts off a heating loop, and the mode needs to collect temperature information, signal transmission, signal judgment, heating loop control and the like, so that the temperature control steps are more, the components are more, and the reliability is relatively poor; the other is to directly control the temperature through the temperature relay, when the temperature relay senses the temperature of the battery stack to reach a set value, the heating loop is directly disconnected, and the device has the advantages of few components, sensitive sensing and high reliability, but the overcurrent of the selected temperature relay is generally smaller than 6A, when the battery stack is heavier and needs high-power heating, the heating current is larger, and the temperature relay often needs to be matched with the electromagnetic relay to control the heating loop, so that the components are excessive and the reliability is reduced. The heating circuit of the lithium battery disclosed by the publication No. CN112421150B is characterized in that the control module drives the heating driving module to control the on-off of the first switch tube according to the temperature of the lithium battery, and the heating module is connected to the two ends of the lithium battery and the solar device, so that the battery and the solar device can be reasonably utilized to supply power to the heating device. But it does not limit the power of the heating module, which may cause the battery to overheat and burn.
Disclosure of Invention
In order to solve the technical problems, the invention provides a lithium ion battery pack with high-power heating.
The invention is realized by the following technical scheme.
The invention provides a lithium ion battery pack with high-power heating; the battery pack module comprises a plurality of single lithium ion batteries, wherein the same number of single lithium ion batteries are connected in series and then connected in parallel, the anode after being connected in parallel is connected with an anode discharging socket and an anode charging socket, and the cathode after being connected in parallel is connected with a cathode discharging socket and a cathode charging socket; the heating module comprises a plurality of heating belts which are uniformly arranged around the battery pack, and each heating belt is respectively connected with a temperature relay in series.
The battery also comprises a protection board, the positive electrode discharging socket, the positive electrode charging socket, the negative electrode discharging socket and the negative electrode charging socket are all connected with the protection board, and the single lithium ion batteries are respectively connected with the protective plate.
The heating belt adopts an external power supply.
The resistance value of the heating belt is fixed.
The heating belts are also provided with current sampling lines.
The invention has the beneficial effects that: the parallel heating mode is adopted, so that the single-path heating current is kept unchanged due to the parallel mode even if the heating loop is successively switched on and off, the problem that high-power heating cannot be realized due to the overcurrent limitation of the temperature relay is solved, and the parallel heating device has the advantages of few components, sensitive induction, high-power heating adaptability and high reliability.
Drawings
FIG. 1 is a schematic diagram of the structure of the present invention;
Detailed Description
The technical solution of the present invention is further described below, but the scope of the claimed invention is not limited to the above.
As shown in FIG. 1, the design of the battery circuit is shown in FIG. 1, wherein X1 is a discharge positive electrode socket, X2 is a discharge negative electrode socket, X3 is a charging socket, X4 is a heating socket, B is a protection plate, K1-K3 are temperature relays, R1-R3 are heating strips, and G is a battery stack.
In order to realize high-reliability high-power heating of the lithium ion battery pack, the adopted control method comprises the following steps:
1. the battery pack circuit is designed with a heating system, and comprises a heating belt and a temperature relay, wherein the heating belt is a heating device with a certain resistance value, and the temperature relay is used for controlling a heating loop.
2. The heating power is provided from the outside, the battery stack is heated by the heating system, and when the temperature is heated to a set value, the heating circuit is disconnected.
3. The heating belts and the temperature relays adopt a grouping parallel connection temperature control mode, namely the heating belts are divided into a plurality of groups, each group is connected with the temperature relay in series, and then the heating belts of the plurality of groups are connected in parallel.
4. The grouping number of the heating belts is determined according to specific heating currents, each group of heating currents is guaranteed not to exceed the limit current of the temperature relay, for example, the heating voltage is 28V, the heating currents are 15A, the heating belts can be divided into 3 groups, each group of heating currents is designed to be 5A, and each group of heating belts is connected with the temperature relay in series.
Claims (5)
1. A lithium ion battery pack with high power heating, characterized in that: the battery pack module comprises a plurality of single lithium ion batteries, wherein the same number of single lithium ion batteries are connected in series and then connected in parallel, the anode after being connected in parallel is connected with an anode discharging socket and an anode charging socket, and the cathode after being connected in parallel is connected with a cathode discharging socket and a cathode charging socket; the heating module comprises a plurality of heating belts which are uniformly arranged around the battery pack, and each heating belt is respectively connected with a temperature relay in series.
2. The lithium-ion battery pack with high power heating of claim 1, wherein: the battery also comprises a protection board, the positive electrode discharging socket, the positive electrode charging socket, the negative electrode discharging socket and the negative electrode charging socket are all connected with the protection board, and the single lithium ion batteries are respectively connected with the protective plate.
3. The lithium-ion battery pack with high power heating of claim 1, wherein: the heating belt adopts an external power supply.
4. The lithium-ion battery pack with high power heating of claim 1, wherein: the resistance value of the heating belt is fixed.
5. The lithium-ion battery pack with high power heating of claim 1, wherein: the heating belts are also provided with current sampling lines.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311320793.0A CN117317453A (en) | 2023-10-12 | 2023-10-12 | Lithium ion battery pack with high-power heating function |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311320793.0A CN117317453A (en) | 2023-10-12 | 2023-10-12 | Lithium ion battery pack with high-power heating function |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN117317453A true CN117317453A (en) | 2023-12-29 |
Family
ID=89260045
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202311320793.0A Pending CN117317453A (en) | 2023-10-12 | 2023-10-12 | Lithium ion battery pack with high-power heating function |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN117317453A (en) |
-
2023
- 2023-10-12 CN CN202311320793.0A patent/CN117317453A/en active Pending
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