CN218351528U - Battery management system and battery box energy storage system - Google Patents
Battery management system and battery box energy storage system Download PDFInfo
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- CN218351528U CN218351528U CN202221201963.4U CN202221201963U CN218351528U CN 218351528 U CN218351528 U CN 218351528U CN 202221201963 U CN202221201963 U CN 202221201963U CN 218351528 U CN218351528 U CN 218351528U
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- 238000004146 energy storage Methods 0.000 title claims abstract description 20
- 238000001816 cooling Methods 0.000 claims abstract description 79
- 239000007788 liquid Substances 0.000 claims description 13
- 239000000110 cooling liquid Substances 0.000 claims description 10
- 230000010365 information processing Effects 0.000 claims description 3
- 239000000178 monomer Substances 0.000 claims description 2
- 230000017525 heat dissipation Effects 0.000 description 4
- 238000010438 heat treatment Methods 0.000 description 4
- 239000004020 conductor Substances 0.000 description 2
- 230000020169 heat generation Effects 0.000 description 2
- 229910000838 Al alloy Inorganic materials 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- 238000007664 blowing Methods 0.000 description 1
- 238000003745 diagnosis Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
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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 present disclosure relates to a battery management system and a battery box energy storage system including the same. Wherein, this battery management system includes: the passive equalization subcomponent comprises a plurality of equalization resistors for equalizing the electric quantity of the battery, and a battery control main component; wherein the passive equalization subcomponent is disposed on a separate circuit board from the battery control main component and is connected to the battery control main component, and wherein the passive equalization subcomponent is located adjacent to and cooled by the battery cooling system.
Description
Technical Field
The present disclosure relates to the field of battery technologies, and in particular, to a battery management system and a battery box energy storage system including the same.
Background
In a Battery Pack (Battery Pack) energy storage system composed of a plurality of interconnected batteries, it is difficult to completely conform the operating characteristics and operating environment of each Battery, which causes the batteries to gradually accumulate differences in electric quantity during charging and discharging, thereby affecting the total capacity and service life of the whole energy storage system. In order to solve the above problem, a Battery Management System (BMS) is generally provided in the Battery box energy storage System, and a balancing circuit for equalizing the amount of electricity is provided in the BMS. At present, the equalization circuit mainly adopts the following two equalization modes: active equalization and passive equalization. Active equalization requires a complex hardware circuit to actively transfer the electric energy in the high-power battery to the low-power battery, and therefore the cost is high. The passive equalization utilizes a plurality of equalization resistors connected with each battery to passively consume the electric energy in the high-power battery, so that the cost is lower.
Most of equalizing circuits in current battery management systems adopt a passive equalizing mode. However, in the passive equalization process, the equalization resistor has a serious heating problem due to the consumption of converting electric energy into heat energy, and when the temperature reaches a certain limit, the equalization circuit must stop working to wait for the temperature of the resistor to decrease, so that the efficiency of passive equalization is relatively low.
Therefore, a new battery management system with a high-efficiency passive equalization function is needed to solve the problem of heat generation of the equalization resistor, thereby improving the efficiency of passive equalization.
SUMMERY OF THE UTILITY MODEL
In order to solve the above problem, the present disclosure provides a battery management system and a battery box energy storage system including the battery management system.
According to an aspect of the present disclosure, there is provided a battery management system, comprising: the passive equalization subcircuit comprises a plurality of equalization resistors for equalizing the electric quantity of the battery and a battery control main circuit; wherein the passive equalization sub-circuit is disposed on a separate circuit board from the battery control main circuit and is connected to the battery control main circuit, and the passive equalization sub-circuit is located adjacent to and cooled by the battery cooling system.
According to an example of the present disclosure, the battery cooling system may be a liquid cooling system and include a cooling duct for circulating a cooling liquid therethrough for cooling the battery, and the passive equalization sub-circuit is located adjacent to and cooled by the cooling duct. In this example, the passive equalization sub-circuit may be located at an inlet of the cooling liquid into the cooling conduit.
According to an example of the present disclosure, the battery cooling system may be an air-cooled system and include a first fan for cooling the battery, and the passive equalization sub-circuit is located adjacent to and cooled by the first fan. In this example, the air cooling system may further include an air inlet and an air outlet disposed on the battery case, and the passive equalization subcircuit is located adjacent to the air inlet. In addition, in this example, the air cooling system may further include a heat sink disposed between the air inlet and the air outlet, the heat sink being coupled to the battery via a first heat conducting structure and configured to conduct heat from the air inlet to the air outlet, and the passive equalization sub-circuit being coupled to the heat sink via a second heat conducting structure.
According to an example of the present disclosure, an equalization fan is further disposed on the passive equalization sub-circuit for providing additional cooling to the passive equalization sub-circuit.
According to an example of the present disclosure, the passive equalization subcircuit is further connected with the battery case or with a heat sink outside the battery case through an equalization heat conducting structure.
According to an example of the present disclosure, the state information includes one or more of voltage information, current information, and temperature information of the battery; and the battery control main circuit comprises: the battery information acquisition circuit is used for acquiring the state information of the battery; and the information processing and control circuit is used for generating a control command for controlling the passive equalization sub-circuit and the battery cooling system based on the acquired state information of the battery.
According to another aspect of the present disclosure, there is provided a battery box energy storage system, comprising: the battery array is composed of a plurality of battery monomers; the battery management system as described above; and a battery case for accommodating the battery array and the battery management system.
According to the battery management system and the battery box energy storage system comprising the same, the cooling of the balance resistor can be provided, the heating problem of the balance resistor is solved, and the passive balance efficiency is improved. In addition, because the inherent battery cooling system is adopted to provide cooling for the equalizing resistor, a special system for resistor cooling does not need to be additionally arranged, and the hardware cost is reduced.
In order to make the aforementioned and other features and advantages of the disclosure more comprehensible, embodiments accompanied with figures are listed below.
Drawings
The accompanying drawings are included to provide a further understanding of the embodiments of the disclosure and are incorporated in and constitute a part of this specification, illustrate embodiments of the disclosure and together with the description serve to explain the principles of the disclosure and not to limit the disclosure. In the drawings, like reference numerals generally refer to like parts.
Fig. 1 shows a prior art battery box energy storage system.
Fig. 2 illustrates an example of a battery management system according to an embodiment of the present disclosure.
Fig. 3 shows an example of an arrangement of a liquid cooling system based battery management system according to an embodiment of the present disclosure.
Fig. 4 shows an example of an arrangement of an air-cooled system based battery management system according to an embodiment of the present disclosure.
Fig. 5 shows an example of an arrangement of a battery management system based on another air-cooled system according to an embodiment of the present disclosure.
Detailed Description
The terms "first," "second," and the like, as used throughout this disclosure, including the claims, are used to designate elements (elements) or to distinguish between different embodiments or ranges, and are not used to limit the number of elements, upper or lower, nor the order of the elements. Further, wherever possible, elements/components/steps with the same reference numbers in the drawings and the description represent the same or similar parts. Elements/components/steps that use the same reference numerals or use the same terminology in different embodiments may be referred to one another in relation to the description.
Fig. 1 shows a prior art battery box energy storage system. As shown in fig. 1, a battery management system 102 and a battery array 103 are disposed between an upper case 101 and a lower case 104 of a battery box energy storage system 100. The battery management system 102 is configured to be connected to the battery array 103 and provide various battery management functions such as battery state monitoring, power management and equalization, temperature adjustment, and fault diagnosis. In addition, a battery cooling system (not shown) for cooling the battery array 103 is also provided in the battery box energy storage system 100, and the battery cooling system can cool the battery when the temperature of the battery is too high, so as to prolong the service life of the battery.
In the case where the battery management system 102 employs passive equalization, it may include a plurality of equalization resistors therein, which may cause serious heating problems during operation, and therefore, there is a need to cool these equalization resistors. According to the embodiment of the disclosure, the equalizing resistors which are usually arranged inside the battery management system are separated from the battery management system and are arranged on the independent circuit board, so that the positions of the equalizing resistors can be adjusted more flexibly, the equalizing resistors can be arranged at proper positions which can be cooled by using a battery cooling system, the heating problem of the equalizing resistors is solved, and the passive equalization efficiency is improved.
Fig. 2 illustrates an example of a battery management system according to an embodiment of the present disclosure. As shown in fig. 2, the battery management system 200 is composed of a passive balancing subcomponent 201 and a battery control main component 202. The passive equalization subcomponent 201 is formed by separating a plurality of equalization resistors for equalizing the battery charge levels from the battery management system and disposing the equalization resistors on a separate circuit board. That is, the passive equalization subcomponent 201 includes at least a plurality of equalization resistors for equalizing the battery charge. The battery control main component 202 is a part of the battery management system 200 other than the passive balancing sub-component 201, and is used to implement various control functions of the battery management system. In one example, the battery control main component 202 may include at least a battery information collecting component (not shown) for collecting status information of the battery, and an information processing and control component (not shown) for generating a control command for controlling the passive balancing sub-component 201 and the battery cooling system based on the collected status information of the battery. In one example, the state information may include one or more of voltage information, current information, and temperature information of the battery, and the battery control master component 202 may determine a state of charge (SOC) and an operating temperature, etc. of the battery based on these information in order to generate appropriate control commands.
In one example, the passive equalization subassembly 201 may include not only a plurality of equalization resistors for equalizing the battery charge, but also a plurality of switches for controlling whether current flows through the plurality of equalization resistors, thereby cooling the resistors and switches as a whole. However, since the plurality of switches do not generate a large amount of heat as a resistor does, in another example, the plurality of switches may not be included on the passive equalization sub-assembly 201, but may still be disposed in the battery control main assembly 202.
In this embodiment, the passive equalization subcomponent 201 is connected to the battery control main component 202 through the pinout 203. In the example where the passive equalization subcomponent 201 includes a plurality of switches, the pinouts 203 include not only pinouts for passing current through the plurality of equalization resistors, but also pinouts for passing switch control signals generated by the battery control main component 202 to the plurality of switches. In another example in which a plurality of switches are provided in the battery control main unit 202, the lead line 203 may be composed of only a lead line for passing current through a plurality of equalizing resistors, and does not include a lead line for passing a switch control signal.
With respect to the battery management system 200 as shown in fig. 2 above, cooling of the equalization resistors with the battery cooling system is accomplished in the present disclosure by locating the passive equalization subassembly 201 in a location adjacent to the battery cooling system. Next, a specific arrangement of a battery management system based on different types of battery cooling systems according to an embodiment of the present disclosure will be described.
Fig. 3 shows an example of an arrangement of a liquid cooling system based battery management system according to an embodiment of the present disclosure.
In this embodiment, a liquid cooling system is employed as the battery cooling system, and as shown in fig. 3, the liquid cooling system includes a cooling pipe 301 disposed below the battery array 103, the cooling pipe 301 being used for circulating a cooling liquid therethrough to cool the battery. Furthermore, as further shown in fig. 3, an inlet 302 for flowing cooling liquid into the inlet of the cooling duct and an outlet 303 for flowing cooling liquid out of the outlet of the cooling duct are also provided on the lower case 104 of the battery box energy storage system 300. It should be noted here that although the cooling duct 301 is shown to be arranged below the battery array 203 in this embodiment, the present disclosure is not limited thereto, and the cooling duct may alternatively be arranged at other positions, for example, above the battery array. Further, the cooling liquid circulating in the cooling pipe may be water, but may also be other types of heat conductive liquid, and the present disclosure is not limited thereto.
Based on the liquid cooling system described above, the passive equalization subassembly 201 may be positioned adjacent to the cooling pipe 301 and cooled by the cooling pipe 301. For example, the passive equalization subassembly 201 may be disposed immediately above or below the cooling conduit 301. In a preferred example, since the cooling liquid near the location of the liquid inlet 302 has the lowest temperature, the passive equalization sub-assembly 201 may be disposed near the location of the liquid inlet 302, i.e., at the inlet of the cooling liquid flowing into the cooling conduit, as shown in FIG. 3. In this way, the liquid cooling system can be utilized to the maximum extent to cool the equalizing resistor, thereby further improving the efficiency of passive equalization.
Fig. 4 shows an example of an arrangement of an air-cooled system based battery management system according to an embodiment of the present disclosure.
In this embodiment, an air cooling system is employed as the battery cooling system, and as shown in fig. 4, the air cooling system includes a first fan 401 for cooling the battery. In addition, as further shown in fig. 4, an air inlet 402 and an air outlet 403 arranged corresponding to the first fan 401 are further provided on the lower case 104 of the battery box energy storage system 400. It should be noted here that although the first fan 401 is shown to be installed at the rear of the battery box energy storage system 400 in this embodiment, such that the intake vent 402 is disposed at the rear box of the battery box energy storage system 400 and the exhaust vent 403 is disposed at the front box of the battery box energy storage system 400, the present disclosure is not limited thereto, and the position and orientation of the first fan 401 may be optionally adjusted, such that the positions of the intake vent and the exhaust vent are adjusted accordingly.
Based on the air cooling system, the passive balance subassembly 201 can be placed adjacent to the first fan 401 and cooled by the first fan 401. In a preferred example, the passive equalization subassembly 201 may be positioned at the intake vent 402, as shown in FIG. 4, since the air near the location of the intake vent 402 has the lowest temperature. In this way, the air-cooled system can be utilized to the maximum extent to cool the equalization resistors, thereby further improving the efficiency of passive equalization.
Fig. 5 shows an example of an arrangement of a battery management system based on another air-cooled system according to an embodiment of the present disclosure.
In contrast to the air cooling system shown in fig. 4, the air cooling system shown in fig. 5 further includes a heat sink 501 disposed between the air inlet 402 and the air outlet 403 and connected to the battery array 103 through the first heat conducting structure 502. In this embodiment, the heat on the battery array 103 can be conducted to the heat sink 501 via the first heat conducting structure 502 for collection, and the heat sink 501 can conduct the collected heat from the air inlet 402 to the air outlet 403 for discharge. That is, compared to the air cooling system shown in fig. 4, the air cooling system shown in fig. 5 not only dissipates heat by the fan 401 in a thermal convection manner, but also dissipates heat by the heat dissipating fins 501 in a thermal conduction manner, thereby further improving heat dissipation efficiency.
Based on the above-mentioned air cooling system, in addition to blowing air toward the passive equalizing subcomponent 201 by the fan 401 for heat dissipation, the passive equalizing subcomponent 201 can be connected to the heat sink 501 through the second heat conducting structure 503, so that the heat on the passive equalizing subcomponent 201 can also be conducted to the heat sink 501 through the second heat conducting structure 503. In this way, the heat sink 501 can be further utilized to cool the equalization resistor, thereby further improving the efficiency of passive equalization. The first heat conducting structure 502 and the second heat conducting structure 503 may be heat conducting pads made of heat conducting materials, or may be directly made of heat conducting gel, which is not limited herein.
Optionally, in addition to dissipating heat from the passive equalization subassembly using a battery cooling system such as a liquid cooling system or an air cooling system as described above, a dedicated equalization fan (not shown) may be further provided on the passive equalization subassembly to provide additional cooling to the passive equalization subassembly using the equalization fan to further increase the efficiency of passive equalization.
In addition, since the battery case is usually made of an aluminum alloy material, which also has good heat dissipation performance, and a heat sink is often attached to the outside of the battery case for further heat dissipation, in an embodiment, the passive balancing subassembly may be further connected to the battery case and/or to the heat sink outside the battery case by a balancing heat conductive material (not shown), so as to further utilize the battery case and the heat sink outside the battery case to provide cooling for the balancing resistor.
It should be noted here that although the above embodiments employ a liquid cooling system and an air cooling system as specific examples of the battery cooling system, the present disclosure is not limited thereto, and the present disclosure may be applied to other types of cooling systems. That is, according to the embodiments of the present disclosure, by separating the balancing resistors from the battery management system and forming a separate passive balancing subassembly, it is possible to more flexibly adjust the positions of the balancing resistors so as to set them at appropriate positions that can be cooled by the battery cooling system, thereby solving the problem of heat generation of the balancing resistors and improving the efficiency of passive balancing.
Although the present disclosure has been described with reference to particular embodiments, it will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the present disclosure, and therefore the scope of the present disclosure should be limited only by the terms of the appended claims.
Claims (10)
1. A battery management system, comprising:
a passive equalization subcomponent including a plurality of equalization resistances for equalizing the battery charge, and,
a battery control main part; wherein,
the passive balancing subassembly is disposed on a separate circuit board from the battery control main subassembly and is connected to the battery control main subassembly, and,
the passive equalization subassembly is located adjacent to and cooled by a battery cooling system.
2. The battery management system of claim 1, wherein:
the battery cooling system is a liquid cooling system and includes a cooling duct for circulating a cooling liquid therethrough to cool the battery,
the passive equalization subassembly is located adjacent to and cooled by the cooling duct.
3. The battery management system of claim 2, wherein:
the passive equalization sub-assembly is located at an inlet of the cooling liquid into the cooling conduit.
4. The battery management system of claim 1, wherein:
the battery cooling system is an air cooling system and includes a first fan for cooling the battery, and,
the passive equalization subassembly is located adjacent to and cooled by the first fan.
5. The battery management system of claim 4, wherein:
the air cooling system also comprises an air inlet and an air outlet which are arranged on the battery box body, and,
the passive equalization subassembly is positioned adjacent to the air intake.
6. The battery management system of claim 5, wherein:
the air cooling system also comprises a radiating fin arranged between the air inlet and the air outlet, the radiating fin is connected with the battery through a first heat conducting structure and is used for conducting heat from the air inlet to the air outlet,
the passive balance sub-assembly is connected with the heat sink through a second heat conducting structure.
7. The battery management system of any of claims 1-6, wherein:
an equalization fan is also disposed on the passive equalization subassembly to provide additional cooling to the passive equalization subassembly.
8. The battery management system of any of claims 1-6, wherein:
the passive balance sub-component is also connected with the battery box body through a balance heat conduction structure or connected with a heat radiating fin outside the battery box body.
9. The battery management system of any of claims 1-6, wherein:
the battery control main unit includes:
the battery information acquisition component is used for acquiring the state information of the battery; and
an information processing and control component for generating control commands for controlling the passive equalization subcomponent and the battery cooling system based on the collected state information of the battery,
wherein the state information includes one or more of voltage information, current information, and temperature information of the battery.
10. A battery box energy storage system, comprising:
the battery array is composed of a plurality of battery monomers;
the battery management system of any of claims 1-9; and the number of the first and second groups,
a battery case for housing the battery array and the battery management system.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221201963.4U CN218351528U (en) | 2022-05-18 | 2022-05-18 | Battery management system and battery box energy storage system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221201963.4U CN218351528U (en) | 2022-05-18 | 2022-05-18 | Battery management system and battery box energy storage system |
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| Publication Number | Publication Date |
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| CN218351528U true CN218351528U (en) | 2023-01-20 |
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| CN202221201963.4U Active CN218351528U (en) | 2022-05-18 | 2022-05-18 | Battery management system and battery box energy storage system |
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