CN211063363U - Lithium battery management system - Google Patents
Lithium battery management system Download PDFInfo
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- CN211063363U CN211063363U CN201921732174.1U CN201921732174U CN211063363U CN 211063363 U CN211063363 U CN 211063363U CN 201921732174 U CN201921732174 U CN 201921732174U CN 211063363 U CN211063363 U CN 211063363U
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Abstract
The utility model relates to a lithium battery management system. This lithium battery management system includes lithium cell group, first voltage current detection module, temperature detection module, second voltage current detection module, switch control module, host system and protection module, lithium cell group is including a plurality of battery cell of series-parallel connection, lithium cell group respectively with first voltage current detection module, temperature detection module, second voltage current detection module, switch control module links to each other, host system respectively with first voltage current detection module, temperature detection module, second voltage current detection module, switch control module, protection module links to each other. This application can carry out real-time detection to the battery cell in the lithium cell group, in time cuts off the poor battery cell of performance, can effectively prolong the life of lithium cell group.
Description
Technical Field
The utility model relates to a lithium cell technical field especially relates to a lithium battery management system.
Background
The lithium battery has the advantages of no pollution, low self-discharge rate, high energy density and the like, and is widely applied to the fields of electronic products, street lamp systems, smart homes and the like. Generally, lithium batteries can form lithium battery packs with different capacities in a series-parallel connection mode to meet the capacity requirements of different fields. However, the difference of each single lithium battery in the manufacturing process can lead to different battery characteristics, the traditional lithium battery management system can realize the detection of the total voltage and the total current of the lithium battery pack, but the detection of each single battery in the lithium battery pack is not realized, and the problems that the whole lithium battery pack cannot work normally and the service life of the lithium battery pack is shortened due to the occurrence of problems of individual single batteries are easy to occur.
SUMMERY OF THE UTILITY MODEL
The to-be-solved technical problem of the utility model is to provide a can prolong lithium cell battery pack life's lithium battery management system.
For realizing the purpose of the utility model, the utility model adopts the following technical scheme:
a lithium battery management system comprises a lithium battery pack, a first voltage and current detection module, a temperature detection module, a second voltage and current detection module, a switching control module, a main control module and a protection module, wherein the lithium battery pack comprises a plurality of single batteries which are connected in series and parallel, the lithium battery pack is respectively connected with the first voltage and current detection module, the temperature detection module, the second voltage and current detection module and the switching control module, the main control module is respectively connected with the first voltage and current detection module, the temperature detection module, the second voltage and current detection module, the switching control module and the protection module,
the first voltage and current detection module is used for detecting the total voltage and the total current of the lithium battery pack;
the temperature detection module is used for detecting the working temperature of the lithium battery pack;
the second voltage and current detection module is used for detecting the voltage and the current of the single battery;
the main control module is used for judging the working state information of the lithium battery pack according to the detected total voltage, total current and temperature and controlling the on-off of the protection module according to the working state information of the lithium battery;
the main control module is further used for judging the working state information of the single batteries according to the detected voltage and current of the single batteries, controlling the switching control module according to the working state information of the single batteries and correspondingly cutting off the single batteries in the lithium battery pack.
Compare in traditional lithium battery management system, this application has increased battery cell voltage and current detection module and switching control module, can not only carry out real-time detection to the total voltage and the total current of lithium cell group, can also carry out real-time detection to the battery cell in the lithium cell group, in time cuts off the battery cell of poor performance, prevents that individual battery cell from damaging the problem that reduces whole lithium cell group life.
In one embodiment, the switching control module comprises a plurality of relay modules, the number of the relay modules is equal to that of the single batteries, each relay module comprises a relay coil and a relay contact controlled by the relay coil, the relay coil is connected with the main control module, and the relay contacts are connected with the single batteries in series.
In one embodiment, the lithium battery management system further comprises a display module and an upper computer, the main control module is respectively connected with the display module and the upper computer, wherein,
the display module is used for displaying the total voltage, the total current, the temperature, the voltage and the current of the single battery detected by the main control module;
the upper computer is used for receiving capacity parameters set by a user, and the main control module is further used for controlling the switching control module and adjusting the series-parallel connection relation of the single batteries in the lithium battery pack according to the capacity parameters.
In one embodiment, the lithium battery management system further includes a temperature compensation module, the temperature compensation module is connected to the main control module, and the main control module is configured to compare the received operating temperature of the lithium battery pack with a set temperature, and control the temperature compensation module to perform temperature compensation on the lithium battery pack according to the comparison result.
In one embodiment, the lithium battery management system further includes a first filtering module, a second filtering module, and a third filtering module, where the first filtering module is connected to the first voltage and current detection module and the main control module, the second filtering module is connected to the second voltage and current detection module and the main control module, and the third filtering module is connected to the temperature detection module and the main control module.
Drawings
Fig. 1 is a schematic structural diagram of a lithium battery management system in an embodiment;
FIG. 2 is a schematic structural diagram of a lithium battery management system in another embodiment;
FIG. 3 is a schematic diagram of a lithium battery management system according to yet another embodiment;
fig. 4 is a schematic structural diagram of a lithium battery management system in yet another embodiment.
Detailed Description
In order to facilitate understanding of the present invention, the present invention will be described more fully hereinafter with reference to the accompanying drawings. Preferred embodiments of the present invention are shown in the drawings. The invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.
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 invention belongs. The terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise. In the description of the present invention, "a plurality" means at least one, e.g., one, two, etc., unless specifically limited otherwise.
Referring to fig. 1, the present embodiment provides a lithium battery management system, including a lithium battery pack 100, a first voltage and current detection module 120, a temperature detection module 140, a second voltage and current detection module 160, a switching control module 180, a main control module 200, and a protection module 220, where the lithium battery pack 100 includes a plurality of single batteries connected in series and in parallel, the lithium battery pack 100 is respectively connected to the first voltage and current detection module 120, the temperature detection module 140, the second voltage and current detection module 160, and the switching control module 180, the main control module 200 is respectively connected to the first voltage and current detection module 120, the temperature detection module 140, the second voltage and current detection module 160, the switching control module 180, and the protection module 220, where,
the first voltage and current detection module 120 is configured to detect a total voltage and a total current of the lithium battery pack 100;
the temperature detection module 140 is configured to detect an operating temperature of the lithium battery pack 100;
the second voltage and current detection module 160 is used for detecting the voltage and current of the single battery;
the main control module 200 is configured to determine the working state information of the lithium battery pack 100 according to the detected total voltage, total current and temperature, and control the on/off of the protection module 220 according to the working state information of the lithium battery;
the main control module 200 is further configured to determine the working state information of the single battery according to the detected voltage and current of the single battery, and control the switching control module 180 according to the working state information of the single battery to correspondingly cut off the single battery in the lithium battery pack 100.
It should be noted that the lithium battery management system provided in this embodiment includes a lithium battery pack 100, a first voltage and current detection module 120, a temperature detection module 140, a second voltage and current detection module 160, a switching control module 180, a main control module 200, and a protection module 220, where the first voltage and current detection module 120 and the second voltage and current detection module 160 may adopt a voltage sensor and a current sensor; the temperature detection module 140 may employ a temperature sensor; the main control module 200 can adopt a single chip microcomputer control chip; the switching control module 180 may adopt a plurality of relay modules, the number of the relay modules is equal to that of the single batteries, each relay module includes a relay coil and a relay contact controlled by the relay coil, the relay coil is connected with the main control module 200, and the relay contacts are connected with the single batteries in series; the protection circuit 220 may employ a circuit breaker.
The working principle of the lithium battery management system provided by the embodiment is as follows: the total voltage, the total current, the operating temperature of the lithium battery pack 100, and the voltage and the current of the battery cells are respectively retrieved through the first voltage and current detection module 120, the temperature detection module 140, and the second voltage and current detection module 160, and the data are sent to the main control module 200, and the main control module 200 determines the operating state information of the lithium battery pack 100 and each battery cell through the detection data. Specifically, when the detected total voltage, total current and total temperature of the lithium battery pack 100 exceed the standard ranges thereof, the protection of the lithium battery pack 100 is implemented by the protection module 220; when the voltage and the current of a single battery are detected to exceed the standard ranges of the voltage and the current of the single battery in the lithium battery pack 100, the relay contact connected with the single battery in series is controlled to be disconnected, and the single battery with poor performance in the lithium battery pack 100 is cut off.
Compare in traditional lithium battery management system, this application has increased battery cell voltage current detection module and switching control module, can not only carry out real-time detection to the total voltage and the total current of lithium cell group, can also carry out real-time detection to the battery cell in the lithium cell group 100, in time cuts off the battery cell of poor performance, prevents that individual battery cell from damaging the problem that reduces whole lithium cell group 100 life.
In one embodiment, referring to fig. 2, the lithium battery management system further includes a display module 240 and an upper computer 260, the main control module 200 is connected to the display module 240 and the upper computer 160, respectively, wherein,
the display module 240 is used for displaying the total voltage, the total current, the temperature, the voltage and the current of the single battery detected by the main control module 200;
the upper computer 260 is configured to receive a capacity parameter set by a user, and the main control module 200 is further configured to control the switching control module 180 according to the capacity parameter and adjust a series-parallel relationship between the single batteries in the lithium battery pack 100.
In this example, the lithium battery management system further includes a display module 240 and an upper computer 260, where the display module is configured to display data received by the main control module 200 in real time, so that a user can visually check the working state information of each single battery in the lithium battery pack 100 and the lithium battery pack 100, and specifically, the display module 240 may adopt a liquid crystal display screen; the host computer 260 can correspondingly adjust the capacity of the lithium battery pack 100 according to the selection of the user, and can also check the working state information of each single battery in the lithium battery pack 100 and the lithium battery pack 100.
In one embodiment, referring to fig. 3, the lithium battery management system further includes a temperature compensation module 280, the temperature compensation module 280 is connected to the main control module 200, and the main control module 200 is configured to compare the received operating temperature of the lithium battery pack 100 with a set temperature, and control the temperature compensation module 280 to perform temperature compensation on the lithium battery pack 100 according to the comparison result.
In this embodiment, the lithium battery management system further includes a temperature compensation module 280, and when the operating temperature of the lithium battery pack 100 received by the main control module 200 exceeds the standard range thereof, the temperature compensation module 280 may perform temperature compensation on the operating temperature, so as to stabilize the temperature within the standard range. Specifically, the temperature compensation module 280 includes a heating unit and a heat dissipation unit.
In one embodiment, referring to fig. 4, the lithium battery management system further includes a first filtering module 300, a second filtering module 320, and a third filtering module 340, where the first filtering module 300 is connected to the first voltage and current detection module 120 and the main control module 200, respectively, the second filtering module 320 is connected to the second voltage and current detection module 160 and the main control module 200, respectively, and the third filtering module 340 is connected to the temperature detection module 140 and the main control module 200, respectively.
In this embodiment, the lithium battery management system further includes a first filtering module 300, a second filtering module 320, and a third filtering module 340, and the added filtering modules can filter the detected total voltage, total current, working temperature, and cell voltage and current of the lithium battery pack 100, filter out interference signals, and improve the accuracy of the detection result.
The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.
The above-mentioned embodiments only represent some embodiments of the present invention, and the description thereof is specific and detailed, but not to be construed as limiting the scope of the present invention. It should be noted that, for those skilled in the art, without departing from the spirit of the present invention, several variations and modifications can be made, which are within the scope of the present invention. Therefore, the protection scope of the present invention should be subject to the appended claims.
Claims (5)
1. A lithium battery management system is characterized by comprising a lithium battery pack, a first voltage and current detection module, a temperature detection module, a second voltage and current detection module, a switching control module, a main control module and a protection module, wherein the lithium battery pack comprises a plurality of single batteries connected in series and parallel, the lithium battery pack is respectively connected with the first voltage and current detection module, the temperature detection module, the second voltage and current detection module and the switching control module, the main control module is respectively connected with the first voltage and current detection module, the temperature detection module, the second voltage and current detection module, the switching control module and the protection module,
the first voltage and current detection module is used for detecting the total voltage and the total current of the lithium battery pack;
the temperature detection module is used for detecting the working temperature of the lithium battery pack;
the second voltage and current detection module is used for detecting the voltage and the current of the single battery;
the main control module is used for judging the working state information of the lithium battery pack according to the detected total voltage, total current and temperature and controlling the on-off of the protection module according to the working state information of the lithium battery;
the main control module is further used for judging the working state information of the single batteries according to the detected voltage and current of the single batteries, controlling the switching control module according to the working state information of the single batteries and correspondingly cutting off the single batteries in the lithium battery pack.
2. The lithium battery management system according to claim 1, wherein the switching control module comprises a plurality of relay modules, the number of the relay modules is equal to the number of the single batteries, the relay modules comprise relay coils and relay contacts controlled by the relay coils, the relay coils are connected with the main control module, and the relay contacts are connected with the single batteries in series.
3. The lithium battery management system of claim 2, further comprising a display module and an upper computer, wherein the main control module is connected to the display module and the upper computer respectively,
the display module is used for displaying the total voltage, the total current, the temperature, the voltage and the current of the single battery detected by the main control module;
the upper computer is used for receiving capacity parameters set by a user, and the main control module is further used for controlling the switching control module and adjusting the series-parallel connection relation of the single batteries in the lithium battery pack according to the capacity parameters.
4. The lithium battery management system according to claim 1, further comprising a temperature compensation module, wherein the temperature compensation module is connected to the main control module, and the main control module is configured to compare the received operating temperature of the lithium battery pack with a set temperature, and control the temperature compensation module to perform temperature compensation on the lithium battery pack according to the comparison result.
5. The lithium battery management system of claim 4, further comprising a first filter module, a second filter module, and a third filter module, wherein the first filter module is respectively connected to the first voltage and current detection module and the main control module, the second filter module is respectively connected to the second voltage and current detection module and the main control module, and the third filter module is respectively connected to the temperature detection module and the main control module.
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| CN201921732174.1U CN211063363U (en) | 2019-10-16 | 2019-10-16 | Lithium battery management system |
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| CN201921732174.1U CN211063363U (en) | 2019-10-16 | 2019-10-16 | Lithium battery management system |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114234640A (en) * | 2021-11-26 | 2022-03-25 | 浙江安力能源有限公司 | Movable heating furnace for testing sodium-nickel battery strings |
| CN116388353A (en) * | 2023-06-06 | 2023-07-04 | 宁波齐云新材料技术有限公司 | Power supply system for lithium battery pack and control method |
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2019
- 2019-10-16 CN CN201921732174.1U patent/CN211063363U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114234640A (en) * | 2021-11-26 | 2022-03-25 | 浙江安力能源有限公司 | Movable heating furnace for testing sodium-nickel battery strings |
| CN116388353A (en) * | 2023-06-06 | 2023-07-04 | 宁波齐云新材料技术有限公司 | Power supply system for lithium battery pack and control method |
| CN116388353B (en) * | 2023-06-06 | 2023-09-08 | 宁波齐云新材料技术有限公司 | Power supply system for lithium battery pack and control method |
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Address after: No.401, No.2, hualangjia Industrial Park, No.28, tongfuyu Industrial Zone, Kukeng community, Guanlan street, Longhua District, Shenzhen City, Guangdong Province Patentee after: SHENZHEN SMART ELECTRONICS Co.,Ltd. Address before: 518000 Longhua Street, Longhua New District, Shenzhen City, Guangdong Province Patentee before: SHENZHEN SMART ELECTRONICS Co.,Ltd. |