CN220914973U - Safety equalization circuit for parallel connection of battery packs - Google Patents
Safety equalization circuit for parallel connection of battery packs Download PDFInfo
- Publication number
- CN220914973U CN220914973U CN202322574517.9U CN202322574517U CN220914973U CN 220914973 U CN220914973 U CN 220914973U CN 202322574517 U CN202322574517 U CN 202322574517U CN 220914973 U CN220914973 U CN 220914973U
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- China
- Prior art keywords
- battery
- transistor switch
- equalization
- equalization circuit
- safety
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- 239000000446 fuel Substances 0.000 claims abstract description 13
- 230000005611 electricity Effects 0.000 claims abstract description 7
- 230000005669 field effect Effects 0.000 claims description 6
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 claims description 2
- 229910052744 lithium Inorganic materials 0.000 claims description 2
- 230000003111 delayed effect Effects 0.000 abstract description 3
- 230000000694 effects Effects 0.000 abstract description 3
- 238000000034 method Methods 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 239000004065 semiconductor Substances 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000000295 complement effect Effects 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Classifications
-
- 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 utility model discloses a safety equalization circuit for parallel connection of battery packs, which comprises a plurality of battery packs arranged in parallel, wherein each battery pack comprises a battery body, a battery fuel gauge and an equalization module, the battery fuel gauge controls the equalization module, and the equalization module limits the charging current of the battery body. The equalization module comprises a resistor R1, an inductor L1 and a transistor switch Q1. When the battery equalization is needed, the switch control pin PCHG of the battery electricity meter opens the transistor switch Q1 and the equalization module M starts to work. The current charges the battery body along the inductance L1 and the resistance R1. Due to the existence of the inductor L1, the rapid increase of the battery current can be effectively delayed, and the effect of the maximum balanced current is limited.
Description
Technical Field
The utility model relates to a charging control circuit, in particular to a safety equalization circuit for parallel connection of battery packs.
Background
With the continuous development of new energy automobiles, the charging technology of power batteries is the most concerned problem. In the current parallel battery pack, because the voltage consistency of each battery is not good, the batteries cannot be effectively discharged together, each battery module can only be discharged in sequence, and the high-power discharge requirement cannot be met.
At present, an effective method is not available, which can solve the problem of safe parallel connection of each battery, and only can charge or discharge each battery to the same voltage for parallel connection, thereby increasing corresponding charge and discharge procedures and increasing energy consumption.
Disclosure of utility model
In view of the above, it is necessary to provide a safety equalization circuit in which battery packs are connected in parallel.
In order to solve the technical problems, the utility model adopts the following technical scheme:
The battery pack parallel safe equalization circuit is characterized by comprising a plurality of battery packs which are arranged in parallel, wherein each battery pack comprises a battery body, a battery fuel gauge and an equalization module, the battery fuel gauge controls the equalization module, and the equalization module limits the charging current of the battery body.
As a preferred embodiment of the present utility model, the SCL pin of the battery gauge is connected to the system clock signal line SCL, and the SDA pin of the battery gauge is connected to the system data signal line SDA.
As a preferred embodiment of the present utility model,
The positive electrode of the battery body is connected with a charging positive electrode terminal P+ through a transistor switch Q2 and a transistor switch Q3, the negative electrode of the battery body is connected with a charging negative electrode terminal P-through a resistor R2,
The switch control pin CHG of the battery fuel gauge is connected to the control electrode of the transistor switch Q2, and the switch control pin DSG of the battery fuel gauge is connected to the control electrode of the transistor switch Q3.
As a preferred embodiment of the present utility model, the equalization module is disposed between the positive electrode of the battery body and the common electrode of the transistor switch Q2 and the transistor switch Q3.
As a preferred embodiment of the present utility model, the equalization module includes a resistor R1, an inductor L1, and a transistor switch Q1.
As a preferred embodiment of the present utility model, the resistor R1, the inductor L1 and the transistor switch Q1 are arranged in series.
As a preferred embodiment of the present utility model, the control electrode of the transistor switch Q1 is connected to the switch control pin PCHG of the battery power meter.
As a preferred embodiment of the present utility model, the transistor switch Q1, the transistor switch Q2 and the transistor switch Q3 are field effect transistors.
As a preferred embodiment of the utility model, the SRP pin of the battery fuel gauge is connected with one end of the resistor R2, and the SRN pin of the battery fuel gauge is connected with the other end of the resistor R2.
As a preferred embodiment of the present utility model, the battery body is a lithium battery.
Compared with the prior art, the utility model has the following beneficial effects:
The utility model provides a safety equalization circuit with parallel battery packs, which is characterized in that when battery equalization is needed, a switch control pin PCHG of a battery fuel gauge 2 opens a transistor switch Q1 and an equalization module M to start working. The current charges the battery body 1 along the inductance L1 and the resistance R1. Due to the existence of the inductor L1, the rapid increase of the battery current can be effectively delayed, and the effect of the maximum balanced current is limited.
Drawings
In order to more clearly illustrate the solution of the present utility model, a brief description will be given below of the drawings required for the description of the embodiments, it being obvious that the drawings in the following description are some embodiments of the present utility model, and that other drawings may be obtained from these drawings without inventive effort for a person skilled in the art.
Fig. 1 is a schematic diagram of module connection of a safety equalization circuit of the battery pack of the present utility model connected in parallel;
FIG. 2 is a circuit diagram of a safety equalization circuit of the present utility model with the battery packs connected in parallel, showing the overall layout;
FIG. 3 is a circuit diagram of a safety equalization circuit of the present utility model with the battery packs connected in parallel, showing a partial layout;
The labels in the figures are illustrated below: 1. a battery body; 2. a battery electricity meter; m, an equalization module; s, a battery pack.
Description of the embodiments
The preferred embodiments of the present utility model will be described in detail below with reference to the accompanying drawings so that the advantages and features of the present utility model can be more easily understood by those skilled in the art, thereby making clear and defining the scope of the present utility model.
As shown in fig. 1, the safety equalization circuit of the battery pack comprises a plurality of battery packs S arranged in parallel, wherein each battery pack S comprises a battery body 1, a battery fuel gauge 2 and an equalization module M, the battery fuel gauge 2 controls the equalization module M, and the equalization module M limits the charging current of the battery body 1.
As shown in fig. 2 and 3, the SCL pin of the battery gauge 2 is connected to the system clock signal line SCL, and the SDA pin of the battery gauge 2 is connected to the system data signal line SDA.
The positive pole of the battery body 1 is connected with a charging positive terminal P+ through a transistor switch Q2 and a transistor switch Q3, the negative pole of the battery body 1 is connected with a charging negative terminal P-through a resistor R2,
The switch control pin CHG of the battery gauge 2 is connected to the control electrode of the transistor switch Q2, and the switch control pin DSG of the battery gauge 2 is connected to the control electrode of the transistor switch Q3.
The equalization module M is disposed between the positive electrode of the battery body 1 and the common electrode of the transistor switch Q2 and the transistor switch Q3.
The equalization module M includes a resistor R1, an inductor L1, and a transistor switch Q1. It should be noted that other numbers of resistors, inductors, and transistor switches may be disposed in the equalization module M.
The resistor R1, the inductor L1 and the transistor switch Q1 are arranged in series.
The control electrode of the transistor switch Q1 is connected to the switch control pin PCHG of the battery gauge 2.
In addition, the transistor switch Q1, the transistor switch Q2 and the transistor switch Q3 are field effect transistors, and may be N-type transistors (such as N-Metal-Oxide-Semiconductor field effect transistors (NMOS)), or P-type Metal-Oxide-Semiconductor field effect transistors, complementary Metal-Oxide-Semiconductor field effect transistors, and other circuit structure types may be used.
The operation of the safety equalization circuit for parallel connection of the battery pack will be described below.
When the battery equalization is required, the switch control pin PCHG of the battery electricity meter 2 turns on the transistor switch Q1 and the equalization module M starts to operate. The current charges the battery body 1 along the inductance L1 and the resistance R1. Due to the existence of the inductor L1, the rapid increase of the battery current can be effectively delayed, and the effect of the maximum balanced current is limited.
In addition, in the charging process, the switch control pin PCHG of the battery electricity meter 2 outputs a pulse signal, and the pulse width is adjusted along with the voltage difference, so that the maximum current in the whole balancing process can be effectively controlled, the battery electricity meter can operate in a safe balancing current range, and the loss generated during battery balancing can be effectively reduced.
Without being limited thereto, any changes or substitutions that are not contemplated by the inventors are intended to be included within the scope of the present utility model. Therefore, the protection scope of the present utility model should be subject to the protection scope defined by the claims.
Claims (10)
1. The battery pack parallel safe equalization circuit is characterized by comprising a plurality of battery packs (S) which are arranged in parallel, wherein each battery pack (S) comprises a battery body (1), a battery fuel gauge (2) and an equalization module (M), the battery fuel gauge (2) controls the equalization module (M), and the equalization module (M) limits the charging current of the battery body (1).
2. The battery pack parallel safety equalization circuit of claim 1, wherein the SCL pin of the battery gauge (2) is connected to the system clock signal line SCL and the SDA pin of the battery gauge (2) is connected to the system data signal line SDA.
3. The battery pack parallel safety equalization circuit of claim 1, wherein,
The positive electrode of the battery body (1) is connected with a charging positive electrode terminal P+ through a transistor switch Q2 and a transistor switch Q3, the negative electrode of the battery body (1) is connected with a charging negative electrode terminal P-through a resistor R2,
The switch control pin CHG of the battery electricity meter (2) is connected to the control electrode of the transistor switch Q2, and the switch control pin DSG of the battery electricity meter (2) is connected to the control electrode of the transistor switch Q3.
4. A safety equalization circuit as defined in claim 3, wherein the battery pack is connected in parallel,
The balancing module (M) is arranged between the anode of the battery body (1) and the common poles of the transistor switch Q2 and the transistor switch Q3.
5. The battery pack parallel safety equalization circuit as set forth in claim 4, wherein said equalization module (M) comprises a resistor R1, an inductor L1 and a transistor switch Q1.
6. The battery pack parallel safety equalization circuit according to claim 5, wherein the resistor R1, the inductor L1, and the transistor switch Q1 are arranged in series.
7. The battery pack parallel safety equalization circuit according to claim 5, wherein the control electrode of the transistor switch Q1 is connected to the switch control pin PCHG of the battery gauge (2).
8. The battery pack parallel safety equalization circuit according to claim 5, wherein the transistor switch Q1, the transistor switch Q2, and the transistor switch Q3 are field effect transistors.
9. A battery pack parallel safety equalization circuit as set forth in claim 3, wherein said SRP pin of said battery gauge (2) is connected to one end of said resistor R2, and said SRN pin of said battery gauge (2) is connected to the other end of said resistor R2.
10. The safety equalization circuit for parallel connection of battery packs according to claim 1, wherein the battery body (1) is a lithium battery.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322574517.9U CN220914973U (en) | 2023-09-21 | 2023-09-21 | Safety equalization circuit for parallel connection of battery packs |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322574517.9U CN220914973U (en) | 2023-09-21 | 2023-09-21 | Safety equalization circuit for parallel connection of battery packs |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220914973U true CN220914973U (en) | 2024-05-07 |
Family
ID=90915282
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202322574517.9U Active CN220914973U (en) | 2023-09-21 | 2023-09-21 | Safety equalization circuit for parallel connection of battery packs |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220914973U (en) |
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2023
- 2023-09-21 CN CN202322574517.9U patent/CN220914973U/en active Active
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