CN220306976U - Echelon utilization system of battery module protection circuit - Google Patents
Echelon utilization system of battery module protection circuit Download PDFInfo
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- CN220306976U CN220306976U CN202321667092.XU CN202321667092U CN220306976U CN 220306976 U CN220306976 U CN 220306976U CN 202321667092 U CN202321667092 U CN 202321667092U CN 220306976 U CN220306976 U CN 220306976U
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- 238000011084 recovery Methods 0.000 claims description 9
- 230000001681 protective effect Effects 0.000 claims 1
- 238000010586 diagram Methods 0.000 description 6
- 238000000034 method Methods 0.000 description 4
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 description 3
- 229910052744 lithium Inorganic materials 0.000 description 3
- 238000007599 discharging Methods 0.000 description 2
- 230000002035 prolonged effect Effects 0.000 description 2
- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008094 contradictory effect Effects 0.000 description 1
- 238000004146 energy storage Methods 0.000 description 1
- 229910001416 lithium ion Inorganic materials 0.000 description 1
- 230000002093 peripheral effect Effects 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 utility model discloses a echelon utilization system of a battery module protection circuit, which comprises: the device comprises an acquisition module, a comparison module, a control module, a voltage reference circuit, a discharge MOS tube control circuit and a charging MOS tube control circuit; the output end of the acquisition module and the output end of the voltage reference circuit are respectively connected with the comparison module, and the output end of the comparison module, the output end of the discharge MOS tube control circuit and the output end of the charge MOS tube control circuit are connected with the input end of the control module; the input end of the acquisition module is connected with the voltage and temperature signal wire harness and the current acquisition circuit wire harness of the battery module. When the circuit is built, the self-contained signal wire harness on the retired power battery module is used, corresponding voltage and temperature signals of each battery are directly transmitted to the chip, the existing resources are fully utilized, the overall cost of the circuit is reduced, and the resources are saved.
Description
Technical Field
The utility model relates to the technical field of power batteries, in particular to a gradient utilization system of a battery module protection circuit.
Background
Various lithium ion battery protection chips are developed by a plurality of companies at home and abroad, and the development is mature. The charge and discharge protection of the retired power lithium battery at home and abroad is the same as the echelon utilization of the retired power lithium battery, and the retired power lithium battery is in a starting stage. There is also a gap in existing protection against more complex battery inconsistencies, as well as lower power consumption requirements.
In the process of performing echelon utilization of the retired power battery, the original automobile BMS battery management system is not suitable for the echelon utilization of the retired power battery due to CAN address loss caused by battery pack splitting, excessive reconstruction cost and the like, so that an effective and cost-saving protection measure is required to be considered for aiming at the safety problem of the echelon utilization of the retired power battery.
Disclosure of Invention
The utility model mainly aims to provide a gradient utilization system of a battery module protection circuit, which aims to directly transmit corresponding voltage and temperature signals of each battery to a chip by utilizing a signal wire harness on a retired power battery module, thereby reducing power consumption and saving energy resources.
In order to achieve the above object, the present utility model provides a cascade utilization system of a battery module protection circuit, comprising: the device comprises an acquisition module, a comparison module, a control module, a voltage reference circuit, a discharge MOS tube control circuit and a charging MOS tube control circuit;
the output end of the acquisition module and the output end of the voltage reference circuit are respectively connected with the comparison module, and the output end of the comparison module, the output end of the discharge MOS tube control circuit and the output end of the charge MOS tube control circuit are connected with the input end of the control module;
the input end of the acquisition module is connected with the voltage and temperature signal wire harness and the current acquisition circuit wire harness of the battery module.
The utility model further adopts the technical scheme that the device further comprises a recovery control module, wherein the input end of the recovery control module is connected with the control module, and the output end of the recovery control module is connected with the input end of the acquisition module.
The control module adopts a BM3451UNDC-T28A chip.
The echelon utilization system of the battery module protection circuit has the beneficial effects that: the utility model adopts the technical scheme that: the device comprises an acquisition module, a comparison module, a control module, a voltage reference circuit, a discharge MOS tube control circuit and a charging MOS tube control circuit; the output end of the acquisition module and the output end of the voltage reference circuit are respectively connected with the comparison module, and the output end of the comparison module, the output end of the discharge MOS tube control circuit and the output end of the charge MOS tube control circuit are connected with the input end of the control module; the input end of the acquisition module is connected with the voltage and temperature signal wire harness and the current acquisition circuit wire harness of the battery module, the signal wire harness of the battery module is used for constructing a circuit, and the corresponding voltage and temperature signals of each battery are directly transmitted to the chip, so that the whole cost of the circuit is reduced by fully utilizing the existing resources, and resources are saved.
Drawings
In order to more clearly illustrate the embodiments of the present utility model or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, and it is obvious that the drawings in the following description are only some embodiments of the present utility model, and other drawings may be obtained according to the structures shown in these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a block diagram of a preferred embodiment of a cascade utilization system of a battery module protection circuit of the present utility model;
FIG. 2 is a schematic diagram showing the circuit connection of a preferred embodiment of the cascade utilization system of the battery module protection circuit of the present utility model;
fig. 3 is a schematic diagram of a control module in a preferred embodiment of the cascade utilization system of the battery module protection circuit of the present utility model.
The achievement of the objects, functional features and advantages of the present utility model will be further described with reference to the accompanying drawings, in conjunction with the embodiments.
Detailed Description
The following description of the embodiments of the present utility model will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are only some, but not all embodiments of the utility model. 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 should be noted that, if directional indications (such as up, down, left, right, front, and rear … …) are included in the embodiments of the present utility model, the directional indications are merely used to explain the relative positional relationship, movement conditions, etc. between the components in a specific posture (as shown in the drawings), and if the specific posture is changed, the directional indications are correspondingly changed.
In addition, if there is a description of "first", "second", etc. in the embodiments of the present utility model, the description of "first", "second", etc. is for descriptive purposes only and is not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In addition, the meaning of "and/or" as it appears throughout includes three parallel schemes, for example "A and/or B", including the A scheme, or the B scheme, or the scheme where A and B are satisfied simultaneously. In addition, the technical solutions of the embodiments may be combined with each other, but it is necessary to base that the technical solutions can be realized by those skilled in the art, and when the technical solutions are contradictory or cannot be realized, the combination of the technical solutions should be considered to be absent and not within the scope of protection claimed in the present utility model.
Referring to fig. 1 to 3, the present utility model provides a cascade utilization system of a battery module protection circuit.
The power battery system for the vehicle consists of three parts, namely an electric core, a battery module and a battery pack. When the battery pack is disassembled in retirement, the battery pack is disassembled to form the modules, the modules are screened to be used as energy storage components for echelon utilization, each module is provided with a signal wire harness, signals on the wire harnesses are transmitted to a protection chip r, the chip is subjected to comparison calculation to give out control signals to be transmitted to a control MOS tube, and the MOS tube is turned off to control the charge and discharge to be turned off, so that the safety problem of the retired power battery in the echelon utilization process is solved.
The protection circuit of the echelon utilization system of the battery module protection circuit mainly comprises three links of acquisition, comparison and control, and a block diagram of the module composition is shown in figure 1.
Referring to fig. 1, a cascade utilization system of a battery module protection circuit according to a preferred embodiment of the present utility model includes: the device comprises an acquisition module, a comparison module, a control module, a voltage reference circuit, a discharge MOS tube control circuit and a charging MOS tube control circuit.
The output end of the acquisition module and the output end of the voltage reference circuit are respectively connected with the comparison module, and the output end of the comparison module, the output end of the discharge MOS tube control circuit and the output end of the charge MOS tube control circuit are connected with the input end of the control module.
The input end of the acquisition module is connected with the voltage and temperature signal wire harness and the current acquisition circuit wire harness of the battery module.
As an implementation manner, the embodiment further includes a recovery control module, where an input end of the recovery control module is connected to the control module, and an output end of the recovery control module is connected to an input end of the acquisition module.
In this embodiment, the control module uses a BM3451UNDC-T28A chip.
The operation principle of the cascade utilization system of the battery module protection circuit of the present utility model is described below with reference to fig. 2 and 3.
The utility model utilizes the signal wires of the power battery modules, takes 5 battery modules as an example, and is shown in fig. 2 and 3, which are a connection diagram of a protection circuit and a signal wire harness and a specific implementation schematic diagram, wherein the model of a main control chip U1 is BM3451UNDC-T28A; the wiring relationship can be completed with reference to fig. 2.
As shown in fig. 3, when the power battery is recycled in a ladder manner, the protection principle is as follows:
overcurrent protection: when the battery is charged and the voltage of the VIN pin is lower than the charging overcurrent protection threshold value, namely no charging overcurrent occurs, as long as any voltage value in the voltage values of (Vb 1), (Vb 2-Vb 1), (Vb 3-Vb 2), (Vb 4-Vb 3) and (Vb+ -Vb 4) is higher than the overcharge protection threshold value and lasts for a period of time of overcharge protection delay, the CO end is pulled to a low level from a high level, and the charging control MOS tube is turned off to stop charging.
Over-discharge protection: when the battery is discharged and the VIN pin voltage is lower than the discharge overcurrent protection threshold value, i.e. no discharge overcurrent occurs, as long as any voltage value in the (Vb 2-Vb 1), (Vb 3-Vb 2), (Vb 4-Vb 3), (vb+ -Vb 4) is lower than the over-discharge protection threshold value and the over-discharge protection delay time is prolonged, the DO end is changed from high level to low level, the charge-discharge control MOS tube is turned off, and the discharge is stopped.
Discharge overcurrent: during discharge, the VIN pin voltage increases with the discharge current. When the voltage of the VIN pin is higher than the overcurrent protection threshold value and the delay time of the discharge overcurrent protection is prolonged, namely, the overcurrent is considered to appear, DO is changed from high level to low level, the discharge control MOS tube is turned off to stop discharging, and meanwhile, the internal pull-down resistor of the VM end of the overcurrent locking terminal is connected. At this time, the load is disconnected to release the lock.
And (3) temperature protection: the temperature signal is directly transmitted to the protection board through a signal wire by a temperature sensor of the module, when the charging temperature is higher than the protection temperature, the CO is pulled down to a low level by an external resistor, the charging control MOS tube is turned off to stop charging, when the temperature of the battery core is lower than the charging protection temperature by 5 ℃ (the set charging overtemperature protection hysteresis temperature), the CO is changed to a high level, and the charging control MOS is turned on again; when the discharge temperature is higher than the protection temperature, DO becomes low level, the discharge MOS tube is turned off to stop discharging, meanwhile, the charge MOS tube is also turned off to inhibit charging, when the temperature of the battery core is lower than the discharge protection temperature 15 ℃ (the set discharge overtemperature protection hysteresis temperature), DO becomes high level, CO becomes high level, and the charge-discharge control MOS is turned on again.
The automobile BMS battery management system intelligently manages and maintains each battery unit through a CAN bus, and retired power battery packs CAN cause the loss of battery CAN addresses when being split, so that the reconstruction cost is too high, and the automobile BMS battery management system is not suitable for the gradient utilization of retired power battery modules; the protection circuits used by the power batteries in other low-power performance requirement scenes are basically formed by building peripheral circuits around the protection chip, the corresponding acquisition circuits are required to acquire signals and transmit the signals to the chip for comparison and calculation, and the cost is raised by too much building of the circuits under the multifunctional requirements. The method still adopts a method for constructing the corresponding protection circuit around the protection IC, but when the circuit is constructed, the self-contained signal wire harness on the retired power battery module is used, and the corresponding voltage and temperature signals of each battery are directly transmitted to the chip, so that the existing resources are fully utilized to reduce the overall cost of the circuit.
In addition, in the prior art, the power consumption is higher due to the complexity of a protection structure and a circuit, and the utility model directly transmits corresponding voltage and temperature signals of each battery to the chip by utilizing the signal wire harness on the retired power battery module, so that a part of power consumption can be reduced, and energy resources can be saved.
The foregoing description is only of the preferred embodiments of the present utility model and is not intended to limit the scope of the utility model, and all equivalent structural changes made by the specification and drawings of the present utility model or direct/indirect application in other related technical fields are included in the scope of the present utility model.
Claims (3)
1. The echelon utilization system of a kind of battery module protective circuit, characterized by, comprising: the device comprises an acquisition module, a comparison module, a control module, a voltage reference circuit, a discharge MOS tube control circuit and a charging MOS tube control circuit;
the output end of the acquisition module and the output end of the voltage reference circuit are respectively connected with the comparison module, and the output end of the comparison module, the output end of the discharge MOS tube control circuit and the output end of the charge MOS tube control circuit are connected with the input end of the control module;
the input end of the acquisition module is connected with the voltage and temperature signal wire harness and the current acquisition circuit wire harness of the battery module.
2. The cascade utilization system of a battery module protection circuit of claim 1, further comprising a recovery control module, wherein an input of the recovery control module is connected to the control module, and an output of the recovery control module is connected to an input of the acquisition module.
3. The cascade utilization system of the battery module protection circuit of claim 1, wherein the control module employs a BM3451 under dc-T28A chip.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321667092.XU CN220306976U (en) | 2023-06-28 | 2023-06-28 | Echelon utilization system of battery module protection circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321667092.XU CN220306976U (en) | 2023-06-28 | 2023-06-28 | Echelon utilization system of battery module protection circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220306976U true CN220306976U (en) | 2024-01-05 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202321667092.XU Active CN220306976U (en) | 2023-06-28 | 2023-06-28 | Echelon utilization system of battery module protection circuit |
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| Country | Link |
|---|---|
| CN (1) | CN220306976U (en) |
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2023
- 2023-06-28 CN CN202321667092.XU patent/CN220306976U/en active Active
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