CN216904388U - Direct current power supply system for storage battery pack - Google Patents
Direct current power supply system for storage battery pack Download PDFInfo
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- CN216904388U CN216904388U CN202123071497.0U CN202123071497U CN216904388U CN 216904388 U CN216904388 U CN 216904388U CN 202123071497 U CN202123071497 U CN 202123071497U CN 216904388 U CN216904388 U CN 216904388U
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- battery pack
- charging unit
- storage battery
- circuit breaker
- power supply
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- 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 direct-current power supply system for a storage battery pack, which comprises a charging unit, a controller and a first breaker, wherein the charging unit is used for charging a direct-current bus and is connected with the storage battery pack serving as a standby power supply in parallel; the first charging unit is connected with the first direct-current bus through the second circuit breaker, the second charging unit is connected with the second direct-current bus through the third circuit breaker, the first circuit breaker, the second circuit breaker and the third circuit breaker are controlled to be opened and closed by the controller, the controller is connected with the monitoring unit, and the monitoring unit is used for monitoring the running states of the first charging unit, the second charging unit, the first storage battery pack and the second storage battery pack. By the aid of the method, the risk that the storage battery pack cannot supply power when the charging unit breaks down can be reduced.
Description
Technical Field
The utility model belongs to the field of power equipment, and particularly relates to a direct-current power supply system for a storage battery pack.
Background
In order to ensure uninterrupted on-line power supply, a storage battery pack serving as a standby power supply is generally arranged for a charging unit, the standby power supply is connected with the charging unit in parallel, the charging unit supplies power to a load on a direct-current bus when in normal operation, the storage battery pack is charged in a floating mode, and when the charging unit fails, the storage battery pack undertakes the task of supplying power to the load on the direct-current bus until the failure is relieved and the charging unit recovers power supply. However, in the current mode, certain problems exist, and in some cases, when the charging unit fails, the electric energy accumulated by the storage battery pack is not enough to support enough time to wait for the charging unit to recover normal power supply, so that the direct-current load loses power. In addition, in order to detect the capacity of the storage battery pack, the storage battery pack needs to be charged and discharged in a checking manner regularly, and if a charging unit fails in the process, the storage battery pack cannot timely play a role of a standby power supply, and the direct-current load is also subjected to power loss. In addition, the problems of open circuit of lead-acid storage batteries, swelling and leakage of lithium ion batteries, thermal runaway and fire and the like frequently occur in the direct current power supply systems at home and abroad at present, the safe and reliable operation of the direct current power supply system for the station is influenced, and serious challenges are brought to operation inspection personnel and fire fighters.
SUMMERY OF THE UTILITY MODEL
The utility model aims to provide a direct-current power supply system for a storage battery pack, which can effectively solve the problem that the storage battery pack cannot guarantee uninterrupted power supply when a charging unit in the prior art breaks down.
In order to solve the technical problem, the utility model adopts the following technical scheme: a direct-current power supply system for a storage battery pack comprises a charging unit for charging a direct-current bus, a controller and a first breaker arranged on the direct-current bus, wherein the charging unit is connected with the storage battery pack serving as a standby power supply in parallel; the first charging unit is connected with the first direct current bus through the second circuit breaker, the second charging unit is connected with the second direct current bus through the third circuit breaker, the first circuit breaker, the second circuit breaker and the third circuit breaker are controlled to be opened and closed by the controller, the controller is connected with the monitoring unit, and the monitoring unit is used for monitoring the running states of the first charging unit, the second charging unit, the first storage battery pack and the second storage battery pack.
Preferably, the first storage battery pack is connected with the first direct current bus through a fourth circuit breaker, the second storage battery pack is connected with the second direct current bus through a fifth circuit breaker, and the fourth circuit breaker and the fifth circuit breaker are controlled to be opened and closed by the controller.
Preferably, the dc power supply system further includes a third charging unit, the third charging unit is connected to the first dc bus through a sixth circuit breaker, the third charging unit is further connected to the second dc bus through a seventh circuit breaker, and the sixth circuit breaker and the seventh circuit breaker are controlled by the controller to be turned on and off. The third charging unit can be used for charging and discharging the first storage battery pack or the second storage battery pack, so that the burden of the first charging unit and the burden of the second charging unit are reduced, and the risk of failure of the first charging unit and the second charging unit are reduced.
Preferably, the third charging unit is connected in series with the first storage battery pack through an eighth breaker, the third charging unit is further connected in series with the second storage battery pack through a ninth breaker, and the eighth breaker and the ninth breaker are controlled to be opened and closed by the controller.
Preferably, a first check diode is arranged between the first storage battery pack and the fourth circuit breaker, and a second check diode is arranged between the second storage battery pack and the fifth circuit breaker.
Preferably, the battery pack is a solid state battery pack. The solid-state battery adopts the inorganic diaphragm and the solid electrolyte, thereby reducing the probability of thermal runaway fire explosion and avoiding the problems of open circuit of the lead-acid storage battery, swelling and leakage of the lithium ion battery, thermal runaway fire and the like which often occur in the traditional direct-current power supply system.
Compared with the prior art, the utility model has the following beneficial effects:
1. the two groups of charging units are arranged, and the first breaker is arranged to divide the direct current bus into two sections, so that the first charging unit supplies power to the first direct current bus and the second charging unit supplies power to the second direct current bus respectively, and the fault of any section of bus in the first direct current bus or the second direct current bus cannot influence the other section of bus, so that the power failure risk is dispersed;
2. the first charging unit and the second charging unit can be mutually used as standby power supplies, and when one of the first charging unit and the second charging unit fails, the first charging unit and the second charging unit can be replaced by the other one in time, so that the power failure risk is further reduced;
3. meanwhile, when one group of storage battery pack is charged and discharged, the other group of storage battery pack is ensured to be used for emergency standby on line, and the power failure risk is further reduced.
Drawings
Fig. 1 is a schematic diagram of a dc power supply system for a battery pack according to an embodiment of the present invention;
fig. 2 is a schematic diagram of an operating principle of a dc power supply system for a secondary battery pack according to a second embodiment.
Wherein: 1. the charging device comprises a first charging unit, a second charging unit, a third charging unit, a first storage battery pack, a second storage battery pack, a first direct-current bus, a second direct-current bus, a first breaker, a second breaker, a third breaker, a fourth breaker, a fifth breaker, a sixth breaker, a seventh breaker, a eighth breaker, a ninth breaker, a first check diode, a second check diode, a third breaker, a fourth breaker, a fifth breaker, a sixth breaker, a seventh breaker, a sixth breaker, a ninth breaker, a first check diode, and a second check diode.
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings. The embodiments described below with reference to the drawings are illustrative and intended to be illustrative of the utility model and are not to be construed as limiting the utility model.
In the description of the present invention, it is to be understood that the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance; the terms "mounted," "connected," "fixed," and the like are to be construed broadly and may, for example, be fixedly connected or detachably connected or integrated; may be mechanically coupled, may be electrically coupled or may be in communication with each other; may be directly connected or indirectly connected through an intermediate, unless otherwise specifically limited. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
The first embodiment is as follows: the embodiment provides a direct current power supply system for a storage battery pack, as shown in fig. 1, the direct current power supply system includes a charging unit for charging a direct current bus, the charging unit is connected in parallel with the storage battery pack as a standby power supply, the direct current power supply system further includes a controller and a first breaker 8 arranged on the direct current bus, the first breaker 8 is used for dividing the direct current bus into two sections of a first direct current bus 6 and a second direct current bus 7 which are connected in series, the charging unit includes a first charging unit 1 and a second charging unit 2, the storage battery pack includes a first storage battery pack 4 and a second storage battery pack 5, the first storage battery pack 4 is connected in parallel with the first charging unit 1, and the second storage battery pack 5 is connected in parallel with the second charging unit 2; the first charging unit 1 is connected with the first direct current bus 6 through a second breaker 9, the second charging unit 2 is connected with the second direct current bus 7 through a third breaker 10, the first breaker 8, the second breaker 9 and the third breaker 10 are controlled to be opened and closed by a controller, the controller is connected with a monitoring unit, and the monitoring unit is used for monitoring the running states of the first charging unit 1, the second charging unit 2, the first storage battery pack 4 and the second storage battery pack 5. The monitoring unit comprises a BMS monitoring module and can be used for uninterruptedly monitoring the voltage, the current, the storage capacity, the temperature and other parameters of the charging unit or the storage battery pack. In this embodiment, the first battery pack 4 is further connected to the first dc bus 6 through a fourth circuit breaker 11, the second battery pack 5 is connected to the second dc bus 7 through a fifth circuit breaker 12, and the fourth circuit breaker 11 and the fifth circuit breaker 12 are controlled by the controller to be turned on and turned off.
In the direct-current power supply system provided by the embodiment, two groups of charging units are arranged, and the first breaker 8 is arranged to divide the direct-current bus into two sections, so that the first charging unit 1 supplies power to the first direct-current bus 6, the second charging unit 2 supplies power to the second direct-current bus 7, and the fault of any one section of bus in the first direct-current bus 6 or the second direct-current bus 7 does not affect the other section of bus, so that the power failure risk is dispersed; the first charging set 1 and the second charging set 2 can be mutually used as standby power supplies, and when one of the first charging set and the second charging set fails, the first charging set and the second charging set can be replaced in time through the other one, so that the power failure risk is further reduced; meanwhile, when one group of storage battery pack is charged and discharged, the other group of storage battery pack is ensured to be used for emergency standby on line, and the power failure risk is further reduced.
The storage battery pack in the embodiment is a solid-state battery pack, and the solid-state battery adopts an inorganic diaphragm and solid electrolyte, so that the probability of thermal runaway fire explosion is reduced, and the problems that the conventional direct-current power supply system is frequently subjected to open circuit of a lead-acid storage battery, swelling and leakage of a lithium ion battery, thermal runaway fire and the like are avoided.
Example two: the present embodiment also provides a dc power supply system for a battery pack, as shown in fig. 2, the present embodiment is different from the above embodiments in that the present embodiment further includes a third charging set 3, the third charging set 3 is connected to the first dc bus 6 through a sixth breaker 13, the third charging set 3 is further connected to the second dc bus 7 through a seventh breaker 14, and both the sixth breaker 13 and the seventh breaker 14 are controlled by the controller to open and close. The third charging set 3 can be used for charging and discharging the first storage battery set 4 or the second storage battery set 5, so that the burden of the first charging set 1 and the second charging set 2 is reduced, and the risk of failure of the first charging set and the second charging set is reduced. When the third charging unit 3 is required to charge the first storage battery pack 4 or the second storage battery pack 5, in order to prevent the first charging unit 1 or the second charging unit 2 from reversely charging the corresponding first storage battery pack 4 or the second storage battery pack 5, a first check diode 17 is further arranged between the first storage battery pack 4 and the fourth circuit breaker 11, and a second check diode 18 is arranged between the second storage battery pack 5 and the fifth circuit breaker 12 in this embodiment.
Further, in this embodiment, the third charging unit 3 is connected in series with the first battery pack 4 through an eighth breaker 15, the third charging unit 3 is connected in series with the second battery pack 5 through a ninth breaker 16, and the eighth breaker 15 and the ninth breaker 16 are controlled by the controller to be opened and closed.
The application process of the dc power supply system described above with reference to fig. 2 is described as follows:
under the normal operating condition, the controller controls the first charging unit 1 and the second charging unit 2 to respectively charge the first direct current bus 6 and the second direct current bus 7, and the controller controls the first breaker 8 to be disconnected, so that the fault of any one section of direct current bus cannot affect the other section of direct current bus. The controller controls the fourth breaker 11 and the fifth breaker 12 to be switched on, so that the first storage battery pack 4 and the second storage battery pack 5 are respectively used as emergency standby power supplies of the first charging unit 1 and the second charging unit 2.
When the first charging unit 1 fails, the controller controls the sixth circuit breaker 13 to be switched on, so that the third charging unit 3 supplies power to the first direct current bus 6; when the second charging unit 2 fails, the controller controls the seventh circuit breaker 14 to be switched on, so that the third charging unit 3 supplies power to the second direct current bus 7; in an extreme case, when the first charging unit 1 and the second charging unit 2 both have faults, the controller controls the sixth circuit breaker 13 and the seventh circuit breaker 14 to be switched on, so that the third charging unit 3 supplies power to the first direct current bus 6 and the second direct current bus 7; when the first charging unit 1 and the third charging unit 3 have faults, the controller controls the first breaker 8 to be switched on, so that the second charging unit 2 supplies power to the first direct current bus 6 and the second direct current bus 7; when the second charging unit 2 and the third charging unit 3 have faults, the controller controls the first circuit breaker 8 to be switched on, so that the first charging unit 1 supplies power to the first direct current bus 6 and the second direct current bus 7.
When the monitoring unit monitors that the electric quantity of the first storage battery pack 4 is lower than a set value, the controller sequentially controls the first circuit breaker 8 to be switched on, the fourth circuit breaker 11 to be switched off and the eighth circuit breaker 15 to be switched on, the third charging unit 3 charges the first storage battery pack 4, when the monitoring unit monitors that the electric quantity of the second storage battery pack 5 is lower than the set value, the controller sequentially controls the first circuit breaker 8 to be switched on, the fifth circuit breaker 12 to be switched off and the ninth circuit breaker 16 to be switched on, and the third charging unit 3 charges the second storage battery pack 5. In the charging process, the single-cell charging cut-off voltage is set to be 4.18V, the total charging voltage of the solid battery pack of the 110V direct-current power supply system is set to be 121V, the total charging voltage of the solid battery pack of the 220V direct-current power supply system is set to be 242V, the constant current is adjustable within the range of 0.1C-0.5C, the constant current charging current can be intelligently set according to the SOC of the battery and the real-time temperature of the storage battery, the charging current can also be manually set, and the constant current is charged to be 4.17V; and then, the charging is stopped when the battery pack is charged to 4.18V by rotating a constant current of 0.05C or the charging voltage of the battery pack is cut off, and the controller also controls the charging to be stopped when the temperature detected by the infrared thermometer exceeds a set value in the charging process. And when the monitoring unit monitors that the total voltage is reduced to be within 99V, charging according to the steps.
The above are only specific embodiments of the present invention, but the technical features of the present invention are not limited thereto, and any changes or modifications within the scope of the present invention by those skilled in the art are covered by the present invention.
Claims (6)
1. A direct current power supply system for a storage battery pack comprises a charging unit for charging a direct current bus, wherein the charging unit is connected with the storage battery pack serving as a standby power supply in parallel, and the direct current power supply system is characterized in that: the charging unit comprises a first charging unit and a second charging unit, the storage battery pack comprises a first storage battery pack and a second storage battery pack, the first storage battery pack is connected with the first charging unit in parallel, and the second storage battery pack is connected with the second charging unit in parallel;
the first charging unit is connected with the first direct current bus through the second circuit breaker, the second charging unit is connected with the second direct current bus through the third circuit breaker, the first circuit breaker, the second circuit breaker and the third circuit breaker are controlled to be opened and closed by the controller, the controller is connected with the monitoring unit, and the monitoring unit is used for monitoring the running states of the first charging unit, the second charging unit, the first storage battery pack and the second storage battery pack.
2. The direct current power supply system for a secondary battery pack according to claim 1, wherein: the first storage battery pack is connected with the first direct current bus through a fourth circuit breaker, the second storage battery pack is connected with the second direct current bus through a fifth circuit breaker, and the fourth circuit breaker and the fifth circuit breaker are controlled to be opened and closed by the controller.
3. A dc power supply system for a secondary battery pack according to claim 2, wherein: the direct-current power supply system further comprises a third charging unit, the third charging unit is connected with the first direct-current bus through a sixth circuit breaker, the third charging unit is further connected with the second direct-current bus through a seventh circuit breaker, and the sixth circuit breaker and the seventh circuit breaker are controlled to be opened and closed by the controller.
4. A dc power supply system for a secondary battery pack according to claim 3, wherein: the third charging unit is connected with the first storage battery pack in series through an eighth breaker, the third charging unit is further connected with the second storage battery pack in series through a ninth breaker, and the eighth breaker and the ninth breaker are controlled to be opened and closed by the controller.
5. The direct current power supply system for a secondary battery pack according to claim 4, wherein: and a first check diode is arranged between the first storage battery pack and the fourth circuit breaker, and a second check diode is arranged between the second storage battery pack and the fifth circuit breaker.
6. The direct current power supply system for a secondary battery pack according to claim 1, wherein: the storage battery pack is a solid-state battery pack.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202123071497.0U CN216904388U (en) | 2021-12-08 | 2021-12-08 | Direct current power supply system for storage battery pack |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202123071497.0U CN216904388U (en) | 2021-12-08 | 2021-12-08 | Direct current power supply system for storage battery pack |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN216904388U true CN216904388U (en) | 2022-07-05 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202123071497.0U Active CN216904388U (en) | 2021-12-08 | 2021-12-08 | Direct current power supply system for storage battery pack |
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|---|---|
| CN (1) | CN216904388U (en) |
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2021
- 2021-12-08 CN CN202123071497.0U patent/CN216904388U/en active Active
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