CN221487403U - Multifunctional lithium battery power supply topology - Google Patents
Multifunctional lithium battery power supply topology Download PDFInfo
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- CN221487403U CN221487403U CN202323179269.4U CN202323179269U CN221487403U CN 221487403 U CN221487403 U CN 221487403U CN 202323179269 U CN202323179269 U CN 202323179269U CN 221487403 U CN221487403 U CN 221487403U
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- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 title claims abstract description 66
- 229910052744 lithium Inorganic materials 0.000 title claims abstract description 66
- 238000012544 monitoring process Methods 0.000 claims description 4
- 238000004880 explosion Methods 0.000 description 2
- 230000020169 heat generation Effects 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000000630 rising effect Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000004146 energy storage Methods 0.000 description 1
- 230000014509 gene expression Effects 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
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Abstract
The utility model provides a multifunctional lithium battery power supply topology which comprises a negative bus, a positive bus, a battery management unit, a first contactor, a second contactor, a third contactor, a fourth contactor and a lithium battery pack, wherein the negative bus is connected with the positive bus; in the case of selecting the first charging mode, the battery management unit controls the four contactors to be closed; when the temperature of the lithium battery pack is greater than the first temperature threshold or the temperature rise rate is greater than the first rate threshold, the battery management unit controls the fourth contactor to be opened; when the temperature of the lithium battery pack is greater than a second temperature threshold or the temperature rise rate is greater than a second rate threshold, the battery management unit controls the second contactor to be disconnected; under the condition that the second charging mode is selected, the battery management unit controls the first contactor, the second contactor and the third contactor to be closed, and controls the fourth contactor to be opened; in the case of selecting the third charging mode, the battery management unit controls the first contactor, the third contactor and the fourth contactor to be closed, and controls the second contactor to be opened.
Description
Technical Field
The utility model relates to the technical field of energy storage and power supply, in particular to a multifunctional lithium battery power supply topology.
Background
In recent years, with rapid development and popularization of smart phones, new energy automobiles, and the like, lithium batteries play an important role in daily life. However, the lithium battery industry develops rapidly, and the associated safety problem is endless, especially in the charging stage of the lithium battery, such as overcharge and explosion of the mobile phone and overcharge and explosion of the new energy vehicle. Therefore, in order to cope with the increasingly prominent lithium battery safety problem, an intelligent high-safety lithium battery power supply topology needs to be designed.
Disclosure of Invention
The utility model provides a multifunctional lithium battery power supply topology which can solve the technical problem that the charging of a lithium battery in the prior art has safety problems.
The utility model provides a multifunctional lithium battery power supply topology which comprises a negative bus, a positive bus, a battery management unit, a first contactor, a second contactor, a third contactor, a fourth contactor and a lithium battery pack, wherein the negative bus is connected with the positive bus;
The battery management unit is used for monitoring the temperature of the lithium battery pack in real time and controlling the closing and opening of the four contactors; the negative electrode of the lithium battery pack is connected with the negative electrode bus, and the positive electrode of the lithium battery pack is connected with one end of the second contactor; one end of the first contactor is connected with the positive electrode bus, and the other end of the first contactor is respectively connected with the other end of the second contactor, one end of the third contactor and one end of the fourth contactor; one end of the first load is connected with the other end of the third contactor, and the other end of the first load is connected with the negative bus; one end of the second load is connected with the other end of the fourth contactor, and the other end of the second load is connected with the negative bus;
the power supply topology has three charging modes, and any charging mode is selected to charge the lithium battery pack according to requirements;
In the case of selecting the first charging mode, the battery management unit controls four of the contactors to be closed; when the temperature of the lithium battery pack is greater than a first temperature threshold or the temperature rise rate is greater than a first rate threshold, the battery management unit controls the fourth contactor to be opened; when the temperature of the lithium battery pack is greater than a second temperature threshold or the temperature rise rate is greater than a second rate threshold, the battery management unit controls the second contactor to be opened;
In the case of selecting a second charging mode, the battery management unit controls the first contactor, the second contactor and the third contactor to be closed and controls the fourth contactor to be opened;
in the case of selecting a third charging mode, the battery management unit controls the first contactor, the third contactor and the fourth contactor to be closed and controls the second contactor to be opened;
Wherein the power of the second load is greater than the power of the first load; the second temperature threshold is greater than the first temperature threshold and the second rate threshold is greater than the first rate threshold.
Preferably, in case of selecting the first charging mode, the battery management unit controls the first contactor to be opened when the lithium battery pack is full.
Preferably, the power supply topology further comprises a first diode and a second diode, wherein the positive electrode of the first diode is connected with the other end of the first contactor, and the negative electrode of the first diode is respectively connected with the other end of the second contactor and the positive electrode of the second diode; and the cathode of the second diode is respectively connected with one end of the third contactor and one end of the fourth contactor.
Preferably, the power supply topology further includes a first protection fuse and a second protection fuse, the first protection fuse being disposed between the first contactor and the first diode; the second protection fuse is disposed between the lithium battery pack and the second contactor.
By applying the technical scheme of the utility model, three charging modes are provided, and the charging modes can be selected according to different application scenes; in the first charging mode, the load and the lithium battery pack are gradually and intelligently cut off according to the temperature rise rate and the temperature of the lithium battery pack, so that the safety and the reliability of the battery system during charging are improved; in addition, when entering into charge and when exiting from the charge mode, the load side operates normally, so that uninterrupted power supply is realized.
Drawings
The accompanying drawings, which are included to provide a further understanding of embodiments of the utility model and are incorporated in and constitute a part of this specification, illustrate embodiments of the utility model and together with the description serve to explain the principles of the utility model. It is evident that the drawings in the following description are only some embodiments of the present utility model and that other drawings may be obtained from these drawings without inventive effort for a person of ordinary skill in the art.
Fig. 1 shows a schematic structural diagram of a multifunctional lithium battery power supply topology according to an embodiment of the present utility model.
Wherein the above figures include the following reference numerals:
1. A negative electrode bus; 2. a battery management unit; 3. a lithium battery pack; 41. a first protection fuse; 42. a second protection fuse; 5. a positive electrode bus; 61. a first contactor; 62. a second contactor; 63. a third contactor; 64. a fourth contactor; 71. a first diode; 72. a second diode; 81. a first load; 82. and a second load.
Detailed Description
It should be noted that, without conflict, the embodiments of the present utility model and features of the embodiments may be combined with each other. The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. The following description of at least one exemplary embodiment is merely exemplary in nature and is in no way intended to limit the utility model, its application, or uses. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.
It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of exemplary embodiments according to the present application. As used herein, the singular is also intended to include the plural unless the context clearly indicates otherwise, and furthermore, it is to be understood that the terms "comprises" and/or "comprising" when used in this specification are taken to specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof.
The relative arrangement of the components and steps, numerical expressions and numerical values set forth in these embodiments do not limit the scope of the present utility model unless it is specifically stated otherwise. Meanwhile, it should be understood that the sizes of the respective parts shown in the drawings are not drawn in actual scale for convenience of description. Techniques, methods, and apparatus known to one of ordinary skill in the relevant art may not be discussed in detail, but should be considered part of the specification where appropriate. In all examples shown and discussed herein, any specific values should be construed as merely illustrative, and not a limitation. Thus, other examples of the exemplary embodiments may have different values. It should be noted that: like reference numerals and letters denote like items in the following figures, and thus once an item is defined in one figure, no further discussion thereof is necessary in subsequent figures.
As shown in fig. 1, the present utility model provides a multifunctional lithium battery power supply topology including a negative bus bar 1, a positive bus bar 5, a battery management unit 2, a first contactor 61, a second contactor 62, a third contactor 63, a fourth contactor 64, and a lithium battery pack 3;
The battery management unit 2 is used for monitoring the temperature of the lithium battery pack 3 in real time and controlling the on and off of the four contactors; the negative electrode of the lithium battery pack 3 is connected with the negative electrode bus 1, and the positive electrode is connected with one end of the second contactor 62; one end of the first contactor 61 is connected to the positive bus bar 5, and the other end is connected to the other end of the second contactor 62, one end of the third contactor 63, and one end of the fourth contactor 64, respectively; one end of a first load 81 is connected to the other end of the third contactor 63, and the other end is connected to the negative bus bar 1; one end of a second load 82 is connected to the other end of the fourth contactor 64, and the other end is connected to the negative bus bar 1;
The power supply topology has three charging modes, and any charging mode is selected to charge the lithium battery pack 3 according to requirements;
When the first charging mode is selected, the battery management unit 2 controls the four contactors to be closed, and at this time, the lithium battery pack 3 is connected to an external charging facility, and the external charging facility charges the lithium battery pack 3 and supplies power to two loads; when the temperature of the lithium battery pack 3 is greater than the first temperature threshold or the temperature rising rate is greater than the first rate threshold, the battery management unit 2 controls the fourth contactor 64 to be opened, and at this time, the lithium battery pack 3 stops supplying power to the second load 82 with high power consumption and only supplies power to the first load 81 with low power consumption, thereby reducing the heat generation of the whole system; when the temperature of the lithium battery pack 3 is greater than a second temperature threshold or the temperature rising rate is greater than a second rate threshold, the battery management unit 2 controls the second contactor 62 to be disconnected, and at this time, the lithium battery pack 3 stops charging, and an external charging facility only supplies power to the first load 81 with low power consumption, so that charging safety accidents of the lithium battery pack 3 are avoided;
in the case of selecting the second charging mode, the battery management unit 2 controls the first contactor 61, the second contactor 62, the third contactor 63 to be closed, and controls the fourth contactor 64 to be opened; at this time, the external charging facility charges the lithium battery pack 3 and supplies power to the first load 81 of low power consumption, i.e., maintains the basic functions of the entire system while reducing the heat generation amount of the entire system;
in the case of selecting the third charging mode, the battery management unit 2 controls the first contactor 61, the third contactor 63, the fourth contactor 64 to be closed, and controls the second contactor 62 to be opened; at this time, the external charging facility only supplies power to the two loads, and stops charging the lithium battery pack 3, so that the operation performance of the whole system is not affected;
wherein the power of the second load 82 is greater than the power of the first load 81; the second temperature threshold is greater than the first temperature threshold and the second rate threshold is greater than the first rate threshold.
The utility model provides three charging modes, which can be selected according to different application scenes; in the first charging mode, the load and the lithium battery pack 3 are gradually and intelligently cut off according to the temperature rise rate and the temperature of the lithium battery pack 3, so that the safety and the reliability of the battery system during charging are improved; in addition, when entering into charge and when exiting from the charge mode, the load side operates normally, so that uninterrupted power supply is realized.
Further, since the lithium battery pack 3 generates a large amount of heat when being charged, when the temperature of the whole lithium battery pack 3 is high, the performance and even safety of the whole system, such as a smart phone, are affected. The second charging mode may be selected when the lithium battery pack 3 is connected to an external charging facility.
Further, in some situations, in order to avoid the influence of the heat generated during charging of the lithium battery pack 3 on the performance of the whole system, such as a smart phone. When the lithium battery pack 3 is connected to an external charging facility, a third charging mode may be selectively entered,
In the present utility model, the negative electrode bus bar 1 and the positive electrode bus bar 5 are used for discharge output and charge input; the lithium battery pack 3 is used as a power source for supplying power to an external load; the battery management unit 2 (BMS unit) is used for information monitoring, thermal management, safety management, etc.
The first load 81 and the second load 82 are external loads, the first load 81 is a basic load, and the second load 82 is a high-power-consumption load.
According to one embodiment of the present utility model, in case of selecting the first charging mode, the battery management unit 2 controls the first contactor 61 to be opened when the lithium battery pack 3 is full. At this time, the lithium battery pack 3 is seamlessly switched into the discharge mode to supply power to the two loads. I.e. when entering and exiting the charging mode, the load side is continuously operating normally.
According to one embodiment of the present utility model, the power supply topology further includes a first diode 71 and a second diode 72, wherein the anode of the first diode 71 is connected to the other end of the first contactor 61, and the cathode is connected to the other end of the second contactor 62 and the anode of the second diode 72, respectively; the cathode of the second diode 72 is connected to one end of the third contactor 63 and one end of the fourth contactor 64, respectively.
By providing the first diode 71 and the second diode 72, current is prevented from flowing backward. Wherein, the first diode 71 and the second diode 72 are both forward-turned on and reverse-turned off.
According to one embodiment of the present utility model, the power supply topology further includes a first protection fuse 41 and a second protection fuse 42, the first protection fuse 41 being disposed between the first contactor 61 and the first diode 71; the second protection fuse 42 is disposed between the lithium battery pack 3 and the second contactor 62.
By providing the first protection fuse 41 and the second protection fuse 42, the circuit is opened when the current is excessively large beyond the allowable threshold, and protection is performed.
In summary, the utility model provides a multifunctional lithium battery power supply topology, which has the following beneficial effects compared with the prior art:
1. Diodes and protection fuses are arranged on the charge and discharge loops of the lithium battery pack 3 to perform safety protection such as current backflow prevention, overcurrent protection and the like;
2. the multiple charging modes can be selected according to different application scenes;
3. In the first charging mode, the load and the lithium battery pack 3 are gradually and intelligently cut off according to the temperature rise rate and the temperature of the lithium battery pack 3, so that the safety and the reliability of the battery system during charging are improved;
4. In the first charging mode, when the charging mode is entered and the charging mode is exited, the load side operates normally, and uninterrupted power supply is realized.
In the description of the present utility model, it should be understood that the azimuth or positional relationships indicated by the azimuth terms such as "front, rear, upper, lower, left, right", "lateral, vertical, horizontal", and "top, bottom", etc., are generally based on the azimuth or positional relationships shown in the drawings, merely to facilitate description of the present utility model and simplify the description, and these azimuth terms do not indicate and imply that the apparatus or elements referred to must have a specific azimuth or be constructed and operated in a specific azimuth, and thus should not be construed as limiting the scope of protection of the present utility model; the orientation word "inner and outer" refers to inner and outer relative to the contour of the respective component itself.
Spatially relative terms, such as "above … …," "above … …," "upper surface on … …," "above," and the like, may be used herein for ease of description to describe one device or feature's spatial location relative to another device or feature as illustrated in the figures. It will be understood that the spatially relative terms are intended to encompass different orientations in use or operation in addition to the orientation depicted in the figures. For example, if the device in the figures is turned over, elements described as "above" or "over" other devices or structures would then be oriented "below" or "beneath" the other devices or structures. Thus, the exemplary term "above … …" may include both orientations "above … …" and "below … …". The device may also be positioned in other different ways (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.
In addition, the terms "first", "second", etc. are used to define the components, and are only for convenience of distinguishing the corresponding components, and the terms have no special meaning unless otherwise stated, and therefore should not be construed as limiting the scope of the present utility model.
The above description is only of the preferred embodiments of the present utility model and is not intended to limit the present utility model, but various modifications and variations can be made to the present utility model by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present utility model should be included in the protection scope of the present utility model.
Claims (4)
1. The multifunctional lithium battery power supply topology is characterized by comprising a negative bus (1), a positive bus (5), a battery management unit (2), a first contactor (61), a second contactor (62), a third contactor (63), a fourth contactor (64) and a lithium battery pack (3);
The battery management unit (2) is used for monitoring the temperature of the lithium battery pack (3) in real time and controlling the closing and opening of the four contactors; the negative electrode of the lithium battery pack (3) is connected with the negative electrode bus (1), and the positive electrode is connected with one end of the second contactor (62); one end of the first contactor (61) is connected with the positive electrode bus bar (5), and the other end of the first contactor is connected with the other end of the second contactor (62), one end of the third contactor (63) and one end of the fourth contactor (64) respectively; one end of a first load (81) is connected with the other end of the third contactor (63), and the other end of the first load is connected with the negative bus (1); one end of a second load (82) is connected with the other end of the fourth contactor (64), and the other end of the second load is connected with the negative bus bar (1);
The power supply topology is provided with three charging modes, and any charging mode is selected to charge the lithium battery pack (3) according to requirements;
In case a first charging mode is selected, the battery management unit (2) controls four of the contactors to be closed; when the temperature of the lithium battery pack (3) is greater than a first temperature threshold or the temperature rise rate is greater than a first rate threshold, the battery management unit (2) controls the fourth contactor (64) to be opened; when the temperature of the lithium battery pack (3) is greater than a second temperature threshold or the temperature rise rate is greater than a second rate threshold, the battery management unit (2) controls the second contactor (62) to be opened;
In case of selecting the second charging mode, the battery management unit (2) controls the first contactor (61), the second contactor (62), the third contactor (63) to be closed, and controls the fourth contactor (64) to be opened;
In case a third charging mode is selected, the battery management unit (2) controls the first contactor (61), the third contactor (63), the fourth contactor (64) to be closed, and controls the second contactor (62) to be opened;
Wherein the power of the second load (82) is greater than the power of the first load (81); the second temperature threshold is greater than the first temperature threshold and the second rate threshold is greater than the first rate threshold.
2. The power supply topology according to claim 1, characterized in that in case a first charging mode is selected, the battery management unit (2) controls the first contactor (61) to open when the lithium battery pack (3) is full.
3. The power supply topology according to claim 1 or 2, characterized in that it further comprises a first diode (71) and a second diode (72), the anode of the first diode (71) being connected to the other end of the first contactor (61), the cathode being connected to the other end of the second contactor (62) and to the anode of the second diode (72), respectively; the negative electrode of the second diode (72) is connected with one end of the third contactor (63) and one end of the fourth contactor (64) respectively.
4. A power supply topology according to claim 3, characterized in that the power supply topology further comprises a first protection fuse (41) and a second protection fuse (42), the first protection fuse (41) being arranged between the first contactor (61) and the first diode (71); the second protection fuse (42) is disposed between the lithium battery pack (3) and the second contactor (62).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202323179269.4U CN221487403U (en) | 2023-11-23 | 2023-11-23 | Multifunctional lithium battery power supply topology |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202323179269.4U CN221487403U (en) | 2023-11-23 | 2023-11-23 | Multifunctional lithium battery power supply topology |
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| Publication Number | Publication Date |
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| CN221487403U true CN221487403U (en) | 2024-08-06 |
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| CN202323179269.4U Active CN221487403U (en) | 2023-11-23 | 2023-11-23 | Multifunctional lithium battery power supply topology |
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| CN (1) | CN221487403U (en) |
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- 2023-11-23 CN CN202323179269.4U patent/CN221487403U/en active Active
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