Balanced maintenance device for storage battery pack

Abstract

The utility model discloses a balance maintenance device for a storage battery pack, relates to the technical field of storage batteries, and aims to solve the problems that the phenomena of overcharge and undercharge are enhanced due to the fact that voltages of single batteries in the conventional storage battery pack influence each other and large fluctuation is generated, and the service life of the storage battery is influenced when the storage battery is in an overcharge or undercharge state for a long time. The number of the storage batteries is four, the upper ends of the four storage batteries are all provided with single monitoring modules, the single monitoring modules are bidirectionally and electrically connected with a total receiving module, a first wireless data transmission module is arranged in the total receiving module, and a second wireless data transmission module is arranged in the balance maintenance management system. The total receiving module is in bidirectional wireless connection with a second wireless data transmission module in the balance maintenance management system through a first wireless data transmission module, and a bidirectional isolation DC / DC module is installed in the monomer monitoring module.

Description

Technical Field

[0001] The utility model relates to the technical field of storage batteries, in particular to a battery pack balancing and maintenance device. Background Art

[0002] The floating charge voltage fluctuation of a single cell in a battery group may be large. The operating regulations provide a float charge voltage limit of ±50mV. Although the single cell voltage of some batteries does not exceed the limit, they deviate from the set voltage for a long time, which lays the hidden danger of battery failure. Through the analysis of battery operation data, we found that:

[0003] Too high a float charge voltage means overcharging the battery. If the battery is in an overcharged state for a long time, it will accelerate the corrosion of the positive plate and shorten the battery life.

[0004] Too low a float charge voltage means that the battery is undercharged. If the battery is undercharged for a long time, it will accelerate the corrosion of the negative plate and also affect the battery life.

[0005] The voltages of individual cells in the battery pack will affect each other, resulting in greater fluctuations and intensifying overcharging and undercharging.

[0006] In view of the above phenomenon, we have proposed a battery pack balancing maintenance device to solve the above problems. Utility Model Content

[0007] The purpose of the present utility model is to provide a battery pack balancing maintenance device to solve the problem raised in the above background technology that the voltages of the individual cells in the existing battery pack will affect each other, resulting in large fluctuations, thereby intensifying the overcharging and undercharging phenomena. The battery is in an overcharged or undercharged state for a long time, which will affect the service life.

[0008] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a battery pack balancing maintenance device, comprising a battery, a total receiving module and a balancing maintenance management system;

[0009] Also includes:

[0010] There are four batteries, and a single-cell monitoring module is installed on the upper end of each of the four batteries. The single-cell monitoring module is bidirectionally electrically connected to the total receiving module. The total receiving module has a built-in first wireless data transmission module, and the balancing maintenance and management system has a built-in second wireless data transmission module. The total receiving module is bidirectionally wirelessly connected to the second wireless data transmission module in the balancing maintenance and management system through the first wireless data transmission module. A bidirectional isolated DC / DC module is installed inside the single-cell monitoring module.

[0011] Preferably, a patch temperature sensor is installed at the front end of the cell monitoring module, and the patch temperature sensor is attached to the outer wall of the battery, and the output end of the patch temperature sensor is electrically connected to the input end of the cell monitoring module.

[0012] Preferably, both the front and rear faces of the battery are provided with strip-shaped heat dissipation grooves, and a plurality of strip-shaped heat dissipation grooves are provided, and the plurality of strip-shaped heat dissipation grooves are distributed equidistantly in the longitudinal direction.

[0013] Preferably, brackets are installed on both sides of the battery, a heat sink is installed on the outer wall of the bracket, two fan slots are provided inside the heat sink, a cooling fan is installed inside the fan slot, and protective nets are installed at the front and rear ends of the cooling fan.

[0014] Preferably, the four corners of the lower end of the battery are equipped with lifting legs.

[0015] Compared with the prior art, the beneficial effects of the present invention are:

[0016] 1. The utility model sets a single-cell monitoring module on the battery. Each single-cell monitoring module is equipped with a bidirectional isolated DC / DC module. The single-cell monitoring module can remotely feed back the detection voltage to the balancing maintenance management system through the main receiving module. The balancing maintenance management system compares the received single-cell voltage value with the average voltage. When the average difference is greater than the set balancing start threshold, it will feed back a signal to the main receiving module, so that the single cell with high voltage will be boosted to V by the bidirectional isolated DC / DC module on the single-cell monitoring module. The balancing current is about A. The modules supply power to the low-voltage module through the communication line, and the low-voltage The single cell monitoring module steps down the voltage to the average voltage of the battery pack through the bidirectional isolated DC / DC module to charge the battery. This process transfers the energy of the high-voltage battery to the low-voltage battery. The low-voltage battery voltage returns to the average voltage state and no balancing is required. The bidirectional isolated DC / DC module can complete balancing in the battery pack's equalization, floating charge, and offline states. The batteries are independent of each other and do not affect each other, thereby effectively achieving the purpose of balancing. This solves the problem that the voltages of the single cells in the existing battery pack will affect each other, resulting in large fluctuations, thereby intensifying overcharging and undercharging. The problem that the battery is in an overcharged or undercharged state for a long time will affect its service life.

[0017] 2. The single-cell monitoring module of the present invention has a temperature detection and adjustment function. It can feed back the real-time temperature emitted by the battery shell to the main receiving module through the patch temperature sensor, and the main receiving module remotely feeds back the temperature to the balancing maintenance management system. When the temperature value received by the balancing maintenance management system is greater than the built-in threshold, it indicates that the temperature is too high. At this time, it will feed back a signal to the main receiving module to control the single-cell monitoring module to drive the cooling fans on both sides of the battery to run, and cooperate with the multiple strip heat dissipation slots at the front and rear ends of the battery to achieve side air induction and heat dissipation, so as to avoid the occurrence of excessively high operating temperatures of the battery. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0019] Figure 2 This is a schematic diagram of the partial structure of the battery of the present utility model;

[0020] Figure 3 This is a diagram of the balancing working principle of the utility model;

[0021] In the figure: 1. Battery; 2. Single-cell monitoring module; 3. Main receiving module; 4. First wireless data transmission module; 5. Balanced maintenance management system; 6. Second wireless data transmission module; 7. SMD temperature sensor; 8. Strip heat sink; 9. Lifting foot; 10. Bracket; 11. Heat sink; 12. Fan slot; 13. Protective net; 14. Bidirectional isolated DC / DC module. DETAILED DESCRIPTION

[0022] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0023] See also Figure 1-3 The present invention provides an embodiment of a battery pack balancing maintenance device, comprising a battery 1, a total receiving module 3 and a balancing maintenance management system 5;

[0024] Also includes:

[0025] There are four batteries 1, and a single-cell monitoring module 2 is installed on the upper end of each of the four batteries 1. The single-cell monitoring module 2 is bidirectionally electrically connected to the total receiving module 3. The total receiving module 3 has a built-in first wireless data transmission module 4, and the balancing maintenance management system 5 has a built-in second wireless data transmission module 6. The total receiving module 3 is bidirectionally wirelessly connected to the second wireless data transmission module 6 in the balancing maintenance management system 5 through the first wireless data transmission module 4. A bidirectional isolated DC / DC module 14 is installed inside the single-cell monitoring module 2.

[0026] See also Figure 2 A patch temperature sensor 7 is installed at the front end of the single-cell monitoring module 2, and the patch temperature sensor 7 is attached to the outer wall of the battery 1. The output end of the patch temperature sensor 7 is electrically connected to the input end of the single-cell monitoring module 2. The patch temperature sensor 7 can detect the temperature emitted by the battery 1 shell in real time and feed it back to the single-cell monitoring module 2.

[0027] See also Figure 2 The front and rear faces of the battery 1 are both provided with strip-shaped heat dissipation grooves 8. There are multiple strip-shaped heat dissipation grooves 8, and the multiple strip-shaped heat dissipation grooves 8 are evenly distributed longitudinally. The strip-shaped heat dissipation grooves 8 can increase the contact area between the front and rear faces of the battery 1 and the air, thereby improving the natural heat dissipation efficiency.

[0028] See also Figure 2 A bracket 10 is installed on both sides of the battery 1, and a heat sink 11 is installed on the outer wall of the bracket 10. Two fan slots 12 are provided inside the heat sink 11. A heat sink fan is installed inside the fan slot 12, and a protective net 13 is installed at the front and rear ends of the heat sink fan. The heat sink fans on both sides of the battery 1 can directly exhaust and dissipate heat from the side of the battery 1 shell, and can indirectly guide the heat dissipated from the strip heat sink 8 to flow to both sides to improve the heat dissipation efficiency.

[0029] See also Figure 2 The four corners of the lower end of the battery 1 are equipped with lifting legs 9, which make the battery 1 have a certain height from the ground to avoid excessive humidity affecting the use of the battery 1.

[0030] Working principle: When in use, the single cell monitoring module 2 on the battery 1 can be used to balance the battery voltage of each group. A bidirectional isolated DC / DC module 14 is designed inside each single cell monitoring module 2. The single cell monitoring module 2 can remotely feed back the detection voltage to the balancing maintenance management system 5 through the main receiving module 3. The balancing maintenance management system 5 compares the received single cell voltage value with the average voltage. When the average difference is greater than the set balancing start threshold, it will feed back a signal to the main receiving module 3, so that the single cell with high voltage will be boosted to 12V through the bidirectional isolated DC / DC module 14 on the single cell monitoring module 2, and the balancing current is about 1A. The modules supply power to the low-voltage module through the communication line, and the low-voltage single cell monitoring module 2 will be stepped down to the average voltage of the battery pack through the bidirectional isolated DC / DC module 14 to charge the battery.

[0031] The single-cell monitoring module 2 also has a temperature detection and adjustment function. It can feed back the real-time temperature emitted by the battery 1 shell to the main receiving module 3 through the patch temperature sensor 7, and the main receiving module 3 remotely feeds back to the balancing maintenance management system 5. When the temperature value received by the balancing maintenance management system 5 is greater than the built-in threshold, it means that the temperature is too high. At this time, it will feed back a signal to the main receiving module 3, so that it controls the single-cell monitoring module 2 to drive the cooling fans on both sides of the battery 1 to run, and cooperate with the multiple strip heat dissipation slots 8 at the front and rear ends of the battery 1 to achieve side-induced air dissipation.

[0032] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above and that the present invention can be implemented in other specific forms without departing from the spirit or essential characteristics of the present invention. Therefore, the embodiments should be considered in all respects as illustrative and non-restrictive, and the scope of the present invention is defined by the appended claims, not the foregoing description, and all variations within the meaning and range of equivalents of the claims are intended to be encompassed within the present invention. Any reference sign in a claim should not be construed as limiting the claim to which it relates.

Claims

1. A battery pack balancing maintenance device, comprising a battery (1), a total receiving module (3) and a balancing maintenance management system (5); Its characteristics are: Also includes: Four storage batteries (1) are provided, and a single-unit monitoring module (2) is installed on the upper end of each of the four storage batteries (1). The single-unit monitoring module (2) is bidirectionally electrically connected to a total receiving module (3). The total receiving module (3) has a built-in first wireless data transmission module (4). The balancing maintenance management system (5) has a built-in second wireless data transmission module (6). The total receiving module (3) is bidirectionally wirelessly connected to the second wireless data transmission module (6) in the balancing maintenance management system (5) via the first wireless data transmission module (4). A bidirectional isolation DC / DC module (14) is installed inside the single-unit monitoring module (2).

2. The battery pack balancing maintenance device according to claim 1, characterized in that: A patch-type temperature sensor (7) is installed at the front end of the cell monitoring module (2), and the patch-type temperature sensor (7) is attached to the outer wall of the battery (1), and the output end of the patch-type temperature sensor (7) is electrically connected to the input end of the cell monitoring module (2).

3. The battery pack balancing maintenance device according to claim 1, characterized in that: The front and rear faces of the battery (1) are both provided with strip-shaped heat dissipation grooves (8), a plurality of strip-shaped heat dissipation grooves (8) are provided, and the plurality of strip-shaped heat dissipation grooves (8) are distributed at equal intervals in the longitudinal direction.

4. The battery pack balancing maintenance device according to claim 1, characterized in that: Brackets (10) are installed on both sides of the battery (1), a heat sink (11) is installed on the outer wall of the bracket (10), two fan slots (12) are provided inside the heat sink (11), a heat sink fan is installed inside the fan slots (12), and protective nets (13) are installed at the front and rear ends of the heat sink fan.

5. The battery pack balancing maintenance device according to claim 1, characterized in that: The four corners of the lower end of the battery (1) are all equipped with lifting legs (9).

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