CN214850532U - Battery management system for realizing parallel connection of multiple groups of battery packs - Google Patents
Battery management system for realizing parallel connection of multiple groups of battery packs Download PDFInfo
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- CN214850532U CN214850532U CN202120343067.0U CN202120343067U CN214850532U CN 214850532 U CN214850532 U CN 214850532U CN 202120343067 U CN202120343067 U CN 202120343067U CN 214850532 U CN214850532 U CN 214850532U
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Abstract
The utility model discloses a realize parallelly connected battery management system of multiunit group battery relates to microprocessor control technical field. The battery management system comprises a communication bus, a management controller module and parallel battery units, wherein the parallel battery module comprises at least two battery modules which are mutually connected in parallel through the communication bus, and the management controller module is electrically connected with the parallel battery units; the management controller module comprises a management controller negative switch and a processor, wherein the processor is electrically connected with the management controller negative switch, and the management controller negative switch is electrically connected with each battery module through a communication bus. The utility model discloses battery management system handles through gathering battery electrical property information, when obtaining the parallelly connected moment of accurate control, carries out the switch parallelly connected, has the advantage that the easy extension of electric current, flexibility are high, the selectivity is strong and the security is high.
Description
Technical Field
The utility model relates to a microprocessor control technical field specifically is a battery management system who realizes multiunit group battery is parallelly connected.
Background
With the popularization of the low-carbon and environment-friendly life concept, the market share of equipment such as electric automobiles, electric bicycles and electric tools which provide energy sources through batteries is continuously increased, the safety problem of the batteries is increasingly highlighted, and the battery management system is used as a main battery safety monitoring system to detect and manage the whole battery pack in real time and is one of the core contents of battery research.
Most of the existing battery management systems perform safety management and control on a group of battery packs, and realize abnormal management and control of overcurrent, undervoltage, overvoltage and the like of the battery packs.
However, the existing battery management system mainly adopts the control of a single battery pack formed by connecting multiple batteries in series and parallel, is generally large in size, cannot be randomly disassembled after the batteries are grouped, is complex to install and is high in maintenance difficulty. Even the parallel battery management system mainly controls the positive pole scheme, the current expansibility is poor, and the cost is high.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a realize parallelly connected battery management system of multiunit group battery to solve the problem that proposes among the above-mentioned background art.
In order to achieve the above object, the utility model provides a following technical scheme:
a battery management system for realizing parallel connection of a plurality of groups of battery packs comprises a communication bus, a management controller module and a parallel battery unit, wherein the parallel battery module comprises at least two battery modules which are mutually connected in parallel through the communication bus, and the management controller module is electrically connected with the parallel battery unit;
the management controller module comprises a management controller negative switch and a processor, the processor is electrically connected with the management controller negative switch, the management controller negative switch is electrically connected with each battery module through a communication bus, and the processor is used for acquiring electrical information corresponding to each battery module.
Furthermore, every battery module is including monitoring management unit, battery module negative pole switch unit and group battery, group battery electric connection monitoring management unit and battery module negative pole switch unit, monitoring management unit electric connection battery module negative pole switch unit, monitoring management unit is used for controlling the running state of battery module negative pole switch unit, battery module negative pole switch unit electric connection management controller negative pole switch.
Furthermore, the monitoring management unit is electrically connected to the communication bus.
Furthermore, the electrical information corresponding to the battery module includes an open-circuit voltage value of the battery pack, an internal resistance value of the battery, a surface temperature value of the battery pack, and a charging/discharging current value of the battery pack.
Furthermore, the management controller negative switch and the battery module negative switch unit are both set to be in an on state and an off state.
Furthermore, the processor is provided with a control strategy, and the control strategy is used for controlling the operation state of the negative switch of the management controller according to the electrical information corresponding to the battery module.
Compared with the prior art, the beneficial effects of the utility model are that:
(1) the utility model discloses a battery management system handles through gathering battery electrical property information to the problem that the mutual charge-discharge of pressure differential that exists when the group battery connects in parallel, when obtaining the parallelly connected moment of accurate control, carries out the switch and connects in parallel, has that the electric current easily expands, the flexibility is high, the selectivity is strong and the security is high advantage;
(2) the utility model discloses a battery management system can present customer to the different selections of battery capacity demand to can the safe and reliable efficient carry out the group battery parallelly connected and disassemble, through long-range realization firmware upgrading, capacity information is mutual, and the cost is lower.
Drawings
Fig. 1 is a schematic block diagram of a battery management system according to the present invention;
fig. 2 is a schematic block diagram of the battery module of the present invention;
fig. 3 is a flow chart of the battery management system of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the drawings in the embodiments of the present invention are combined below to clearly and completely describe the technical solutions in the embodiments of the present invention. The described embodiments are some, but not all embodiments of the invention. Thus, the following detailed description of the embodiments of the present invention, presented in the accompanying drawings, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention.
It should be noted that, in the description of the present invention, the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, which is only for the convenience of description and simplification of the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.
Further, it will be appreciated that the dimensions of the various elements shown in the figures are not drawn to scale, for ease of description, and that the thickness or width of some layers may be exaggerated relative to other layers, for example.
It should be noted that like reference numerals and letters refer to like items in the following figures, and thus, once an item is defined or illustrated in one figure, it will not need to be further discussed or illustrated in detail in the description of the following figure.
Example 1
Referring to fig. 1 and fig. 3, the present embodiment provides a battery management system for implementing parallel connection of multiple groups of battery packs, where the battery management system includes a communication bus, a management controller module and parallel battery units, where the parallel battery module includes at least two battery modules, and the management controller module includes a management controller negative switch and a processor. Specifically, at least two battery modules are connected in parallel with each other through a communication bus, the processor is electrically connected with the management controller negative electrode switch, the management controller negative electrode switch is electrically connected with each battery module through the communication bus, and the processor is used for acquiring electrical information corresponding to each battery module. In this embodiment, the electrical information corresponding to the battery module includes an open-circuit voltage value of the battery pack, an internal resistance value of the battery, a surface temperature value of the battery pack, and a charging/discharging current value of the battery pack.
It is noted that the processor is provided with a control strategy for controlling and managing the operation state of the negative switch of the controller according to the electrical information corresponding to the battery module. The management controller negative pole switch is provided with two states of connection and disconnection. Meanwhile, the control strategy can be used for setting an electrical information threshold for the operation of the battery module, that is, the control strategy can set an open-circuit voltage threshold of the battery pack, an internal resistance threshold of the battery, a surface temperature threshold of the battery pack and a charging and discharging current threshold of the battery pack.
Referring to fig. 2, as can be seen from fig. 2, each battery module includes a monitoring management unit, a battery module negative electrode switching unit, and a battery pack. The battery pack is electrically connected with the monitoring management unit and the battery module negative pole switch unit, the monitoring management unit is electrically connected with the battery module negative pole switch unit and used for controlling the running state of the battery module negative pole switch unit, and the battery module negative pole switch unit is provided with two states of connection and disconnection. And meanwhile, the battery module negative switch unit is electrically connected with the management controller negative switch. It is noted that the monitoring management unit is electrically connected to the communication bus.
Referring to fig. 3, it can be seen from fig. 3 that: the battery management system for realizing the parallel connection of the two groups of battery packs provided by the embodiment has the following operation flows:
step S1: and setting an open-circuit voltage threshold value, a battery internal resistance threshold value, a battery surface temperature threshold value and a battery charging and discharging current threshold value of the battery pack for the processor through a control strategy, wherein the open-circuit voltage threshold value, the battery internal resistance threshold value, the battery surface temperature threshold value and the battery charging and discharging current threshold value are not unique and can be selected according to the use of a user and the specific circuit operation state.
Step S2: the processor acquires an open-circuit voltage value, a battery internal resistance value, a surface temperature value of the battery pack and a charging and discharging current value of the battery pack corresponding to the battery pack in each battery module through the corresponding monitoring management unit in each battery module.
Step S3: the processor compares the open-circuit voltage value, the internal resistance value of the battery, the surface temperature value of the battery and the charge-discharge current value of the battery corresponding to the battery actually acquired in the step S2 with the open-circuit voltage threshold value, the internal resistance threshold value of the battery, the surface temperature threshold value of the battery and the charge-discharge current threshold value of the battery preset in the step S1 in a one-to-one manner. That is, the open-circuit voltage value corresponding to the battery pack is compared with the open-circuit voltage threshold of the battery pack, the battery internal resistance value corresponding to the battery pack is compared with the battery internal resistance threshold of the battery pack, the surface temperature value corresponding to the battery pack is compared with the surface temperature threshold of the battery pack, and the charge-discharge current value corresponding to the battery pack is compared with the charge-discharge current threshold of the battery pack. The comparison result is obtained.
Step S4: according to the comparison result acquired in step S3, the processor controls the switching state of the management controller negative switch. Specifically, when any actual value in the comparison result is not less than the preset threshold value, the state of the negative switch of the management controller is switched to the off state. And when any actual value in the comparison result is smaller than a preset threshold value, the state of the negative switch of the management controller is switched to a conducting state.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (5)
1. The utility model provides a realize parallelly connected battery management system of multiunit group battery, battery management system is including communication bus and management controller module, its characterized in that: the battery management system also comprises a parallel battery unit, the parallel battery unit comprises at least two battery modules, the at least two battery modules are mutually connected in parallel through a communication bus, and the management controller module is electrically connected with the parallel battery unit;
the management controller module comprises a management controller negative switch and a processor, the processor is electrically connected with the management controller negative switch, the management controller negative switch is electrically connected with each battery module through a communication bus, and the processor is used for acquiring electrical information corresponding to each battery module.
2. The battery management system for realizing the parallel connection of a plurality of groups of battery packs according to claim 1, wherein: every battery module is including monitoring management unit, battery module negative pole switch unit and group battery, group battery electric connection monitoring management unit and battery module negative pole switch unit, monitoring management unit electric connection battery module negative pole switch unit, monitoring management unit is used for controlling battery module negative pole switch unit's running state, battery module negative pole switch unit electric connection management controller negative pole switch.
3. The battery management system for realizing the parallel connection of a plurality of groups of battery packs according to claim 2, wherein: the monitoring management unit is electrically connected with the communication bus.
4. The battery management system for realizing the parallel connection of a plurality of groups of battery packs according to claim 1 or 2, wherein: the electrical information corresponding to the battery module comprises an open-circuit voltage value of the battery pack, an internal resistance value of the battery, a surface temperature value of the battery pack and a charging and discharging current value of the battery pack.
5. The battery management system for realizing the parallel connection of a plurality of groups of battery packs according to claim 1 or 2, wherein: and the management controller negative switch and the battery module negative switch unit are both provided with two states of connection and disconnection.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202120343067.0U CN214850532U (en) | 2021-02-06 | 2021-02-06 | Battery management system for realizing parallel connection of multiple groups of battery packs |
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| CN202120343067.0U CN214850532U (en) | 2021-02-06 | 2021-02-06 | Battery management system for realizing parallel connection of multiple groups of battery packs |
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| CN214850532U true CN214850532U (en) | 2021-11-23 |
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| CN202120343067.0U Active CN214850532U (en) | 2021-02-06 | 2021-02-06 | Battery management system for realizing parallel connection of multiple groups of battery packs |
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- 2021-02-06 CN CN202120343067.0U patent/CN214850532U/en active Active
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