CN219739033U

CN219739033U - Energy storage battery controlled by double BMSs and provided with heating function

Info

Publication number: CN219739033U
Application number: CN202321191868.5U
Authority: CN
Inventors: 秦雪林; 雷同; 顾忠林; 钟继新
Original assignee: Huizhou Tianchen Shangneng Technology Co ltd
Current assignee: Huizhou Tianchen Shangneng Technology Co ltd
Priority date: 2023-05-17
Filing date: 2023-05-17
Publication date: 2023-09-22
Anticipated expiration: 2033-05-17

Abstract

The utility model provides an energy storage battery of two BMS control and taking heating function, relates to battery technology field, including battery module, heating module and two BMS control system, battery module's both ends are connected with the both ends of load respectively; the heating module comprises a heating device and a heating control module, the heating device is connected with two ends of a load, the heating control module is arranged between the heating device and the load, and the heating control module is connected with a double BMS control system; the double BMS control system comprises a first BMS and a second BMS, wherein the first BMS controls the first switch module, the second BMS controls the second switch module, and the first switch module and the second switch module are arranged between the battery module and the load. The utility model further combines a group of BMSs on the original BMS loop of the battery pack, and ensures that the two BMSs do not interfere with each other to perform normal functions, including battery detection, external communication and heating control.

Description

Energy storage battery controlled by double BMSs and provided with heating function

Technical Field

The utility model relates to the technical field of batteries, in particular to an energy storage battery with double BMS control and a heating function.

Background

Lithium batteries occupy an increasingly important component in the energy and power markets. As is well known, the battery is an important component of a power supply system, is an energy guarantee under the condition of no commercial power, and the energy storage system carrying the lithium battery has the characteristics of high reliability, high safety, high integration level and low energy consumption, can be rapidly and flexibly deployed, and is widely applied to power supply and energy storage scenes for household or motor home. With the continuous progress of lithium battery technology and the continuous decline of cost, the lithium battery matching system with small size gradually occupies the market.

The BMS is used as a core management system of the lithium battery system, and can ensure the safety and reliability of the whole system through the point-to-point management and protection of the units, and has the conventional protection functions of overcharge, overdischarge, overtemperature, balance and the like. Meanwhile, predictive management parameters such as SOC, SOH and the like are introduced to manage the whole life cycle of the whole system and a single unit. In some extremely cold regions, a BMS with a heating function must be used for lithium batteries. So in the system, the reliability of the BMS affects the life cycle and the use safety performance of the lithium battery, and the more products with logic functions, the more fault points and probabilities.

The conventional battery structure is shown in fig. 1, and the heating plate is installed in the lithium battery pack and is controlled to be turned on and off by a single BMS component, which has the following disadvantages

1. When the BMS component or the host computer has single-point failure and the battery body is not abnormal, the battery cannot work normally;

2. the battery information acquisition loop is provided with a single-point outlet fault, the battery body is free from abnormality, a BMS protection function is triggered, and the normal working state of the battery is cut off;

3. the heating control switch or the heating control wire harness has a single point of failure, so that the BMS can not start the heating function.

For example, when the battery is charged in a low-temperature environment, the heating function is required to be started, and if the BMS heating control fails, the battery cannot be charged.

Disclosure of Invention

The utility model aims to provide an energy storage battery with double BMS control and heating function, which aims to solve the technical problems.

In order to achieve the above purpose, the present utility model is realized by the following technical scheme:

the energy storage battery with the double BMS control and the heating function comprises a battery module, a heating module and a double BMS control system, wherein two ends of the battery module are respectively connected with two ends of a load;

the heating module comprises a heating device and a heating control module, the heating device is connected with two ends of a load, the heating control module is arranged between the heating device and the load, and the heating control module is connected with a double BMS control system;

the double BMS control system comprises a first BMS and a second BMS, wherein the first BMS controls the first switch module, the second BMS controls the second switch module, and the first switch module and the second switch module are arranged between the battery module and the load.

Preferably, the heating device is arranged on the battery module to form a battery pack, the battery pack is connected with the acquisition interface of the first BMS through a first sampling signal line, and the battery pack is connected with the acquisition interface of the second BMS through a second sampling signal line.

Preferably, the first sampling signal line and the second first sampling signal line are both 8S voltage/4 temperature sampling signal lines.

Preferably, the heating control module is connected with a heating control interface of the first BMS and a heating control interface of the second BMS, respectively.

Preferably, the first switch module includes a first relay and a second relay connected in series.

Preferably, the second switch module includes a third relay and a fourth relay connected in series.

Preferably, the first switch module and the second switch module are connected in parallel.

Preferably, the first BMS is further provided with a first communication interface, and the second BMS is further provided with a second communication interface.

The energy storage battery with the double BMS control and the heating function has the following beneficial effects:

1. the energy storage battery with the double BMS control and the heating function is provided with a double BMS control system, the double BMS control system comprises a first BMS and a second BMS, two sets of acquisition wire harnesses are adopted, each set of acquisition wires are independent and are respectively connected with the first BMS and the second BMS, independent monitoring data are uploaded to the respective connected BMS and do not interfere with each other, and one set of acquisition wires fail and do not influence the other set of wire harnesses;

2. the energy storage battery with the double BMS control and the heating function is provided with a heating module, wherein the heating module comprises a heating device and a heating control module; the heating start is controlled by a switch in the heating control module, the heating control module receives signals of the BMS to control the start or the stop, the heating control module is a fault easy occurrence point, and two groups of BMS simultaneously control the heating control modules to provide a more stable signal control source;

3. according to the energy storage battery with the double BMS control and heating functions, the first BMS controls the first switch module, the second BMS controls the second switch module, two groups of BMSs are connected in parallel to control the output of the main loop, and when the two groups of BMSs are in normal operation, the battery is abnormal, and the two main loops are disconnected. When one group of BMS outlet faults cannot detect or judge the battery state or the faults occur during the control period, the other group of BMS normally works, and the battery still has normal voltage output, so that the normal work is satisfied, and the stability of the battery output is improved;

4. according to the energy storage battery with the double BMS control and the heating function, the first communication interface and the second communication interface can be output outwards through the circuit, and the independent communication addresses are respectively configured, so that the state information of the battery is ensured to be output outwards accurately.

Drawings

FIG. 1 is a schematic view of the overall structure of a prior art battery;

fig. 2 is a schematic structural view of an energy storage battery controlled by a dual BMS and having a heating function.

Detailed Description

In order to make the technical solution of the present utility model better understood by those skilled in the art, the following further details of the present utility model will be described with reference to examples and drawings.

It will be understood that when an element is referred to as being "fixed to" another element, it can be directly on the other element or intervening elements may also be present; when an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "left," "right," and the like are used herein for illustrative purposes only and are not meant to be the only embodiment.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this utility model belongs. The terminology used herein in the description of the utility model is for the purpose of describing particular embodiments only and is not intended to be limiting of the utility model. The term "and/or" as used herein includes any and all combinations of one or more of the associated listed items.

As shown in fig. 2, the energy storage battery with the double BMS control and the heating function comprises a battery module 3, a heating module and a double BMS control system, wherein two ends of the battery module 3 are respectively connected with two ends of a load; the heating module comprises a heating device 4 and a heating control module 5, wherein the heating device 4 is connected with two ends of a load, the heating control module 5 is arranged between the heating device 4 and the load, and the heating control module 5 is connected with a double BMS control system; the double BMS control system comprises a first BMS1 and a second BMS2, wherein the first BMS1 controls a first switch module, the second BMS2 controls a second switch module, and the first switch module and the second switch module are arranged between the battery module 3 and a load.

Further, the heating device 4 is arranged on the battery module 3 to form a battery pack, the battery pack is connected with the collection interface of the first BMS1 through a first sampling signal line 7, and the battery pack is connected with the collection interface of the second BMS2 through a second sampling signal line 8.

Further, the first sampling signal line 7 and the second first sampling signal line 7 are both 8S voltage/4 temperature sampling signal lines.

Further, the heating control module 5 is connected with the heating control interface of the first BMS1 and the heating control interface of the second BMS2, respectively.

Further, the first switch module comprises a first relay 9 and a second relay 10 connected in series.

Further, the second switch module includes a third relay 11 and a fourth relay 12 connected in series.

Further, the first switch module and the second switch module are connected in parallel.

Further, the first BMS1 is further provided with a first communication interface 13, and the second BMS2 is further provided with a second communication interface 6.

It should be noted that: in this embodiment, the negative electrode of the battery module 3 is connected with the negative electrode of the load, and the positive electrode of the battery module 3 is connected with the positive electrode of the load, thereby forming a main loop output; the heating device 4 adopts a heating plate and is arranged in the battery module 3, the negative electrode of the heating device 4 is connected with the negative electrode of the power supply, the positive electrode of the heating device 4 is connected with the positive electrode of the power supply to form a heating loop, and when the temperature is in a set low-temperature state, the power supply can supply power to the heating plate; the acquisition interface of the first BMS1 is connected with the battery pack through an 8S voltage/4 temperature sampling signal line, can acquire the voltage and the battery temperature of the battery pack, and transmits the voltage and the battery temperature signals to the first BMS1; similarly, the collection interface of the second BMS2 is connected with the battery pack through an 8S voltage/4 temperature sampling signal line, and can collect the voltage and the battery temperature of the battery pack and transmit the voltage and the battery temperature signals to the second BMS2; in this embodiment, two sets of collection pencil are installed to the group battery, and every collection line is independent, connects two sets of BMSs respectively, and independent monitoring data uploads to the BMS who connects respectively, does not interfere each other, and wherein a set of collection line inefficacy also does not influence another group pencil. The heating control interface of the first BMS1 and the heating control interface of the second BMS2 are connected with the heating control module 5, the inside of the heating control module 5 is provided with switch control, the heating control module 5 receives signals of the first BMS1 and the second BMS2 to control on or off, the heating control module 5 is a fault easy occurrence point, and the two groups of BMSs simultaneously control the heating modules to provide a more stable signal control source; the first switch module controlled by the first BMS1 comprises a first relay 9 and a second relay 10 which are connected in series, the second switch module controlled by the second BMS2 comprises a third relay 11 and a fourth relay 12 which are connected in series, the first switch module and the second switch module are connected in parallel, when two groups of BMSs are in normal operation, the batteries are abnormal, the two main loops are disconnected for output, when one group of BMSs fails and cannot detect or judge the battery state or fails during control, the other group of BMSs normally works, the batteries still have normal voltage output, the normal operation is met, and the stability of the battery output is improved; the first BMS1 is also provided with a first communication interface 13, the second BMS2 is also provided with a second communication interface 6, two paths of communication are output outwards, independent communication addresses are respectively configured, and the accurate output of the state information of the battery is ensured. The energy storage battery with the double BMS control and heating functions adopts the circuit structure of the double BMS management system, balances the functions of the two BMSs, enables the two BMSs to be compatible and compatible in use in the same battery pack, and can not influence normal operation of the battery except abnormality of a battery body, including abnormality of a single loop wire harness or the single BMS body, and can improve the safety of battery power supply operation and the stability of protection functions.

The above description is only of the preferred embodiments of the present utility model, and is not intended to limit the present utility model in any way; those skilled in the art will readily appreciate that the present utility model may be implemented as shown in the drawings and described above; however, those skilled in the art should appreciate that many modifications, adaptations, and variations of the present utility model can be made without departing from the scope of the present utility model as set forth in the above-described aspects; meanwhile, any equivalent changes, modifications and evolution of the above embodiments according to the essential technology of the present utility model still fall within the scope of the present utility model.

Claims

1. Energy storage battery of two BMS control and area heating function, its characterized in that: the solar battery module comprises a battery module, a heating module and a double BMS control system, wherein two ends of the battery module are respectively connected with two ends of a load;

2. The energy storage battery with a heating function controlled by a double BMS according to claim 1, wherein: heating device sets up at battery module formation group battery, the group battery passes through the collection interface connection of first sampling signal line and first BMS, and the group battery passes through the collection interface connection of second sampling signal line and second BMS.

3. The energy storage battery with a heating function controlled by a double BMS according to claim 2, wherein: the first sampling signal line and the second first sampling signal line are both 8S voltage/4 temperature sampling signal lines.

4. The energy storage battery with a heating function controlled by a double BMS according to claim 1, wherein: the heating control module is connected with the heating control interface of the first BMS and the heating control interface of the second BMS respectively.

5. The energy storage battery with a heating function controlled by a double BMS according to claim 1, wherein: the first switch module comprises a first relay and a second relay which are connected in series.

6. The dual BMS controlled energy storage battery with heating function according to claim 5, wherein: the second switch module comprises a third relay and a fourth relay which are connected in series.

7. The dual BMS controlled energy storage battery with heating function according to claim 6, wherein: the first switch module and the second switch module are connected in parallel.

8. The energy storage battery with a heating function controlled by a double BMS according to claim 1, wherein: the first BMS is further provided with a first communication interface, and the second BMS is further provided with a second communication interface.