CN210744092U - Short-plate battery isolation device for retired power battery - Google Patents
Short-plate battery isolation device for retired power battery Download PDFInfo
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- CN210744092U CN210744092U CN201922353502.3U CN201922353502U CN210744092U CN 210744092 U CN210744092 U CN 210744092U CN 201922353502 U CN201922353502 U CN 201922353502U CN 210744092 U CN210744092 U CN 210744092U
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Abstract
The application discloses short plate battery isolating device of retired power battery includes: the battery module comprises at least one short plate battery, and the short plate battery is connected into the isolation gating configuration matrix after being bridged by a bypass; the isolation gating configuration matrix is connected with fuses in series at two ends of the short-plate battery, and positions of short splicing pieces are reserved for mounting the short splicing pieces; and measuring interfaces are reserved at two ends of the short plate battery and are used for being connected to the trusteeship monitoring circuit. The battery pack assembly device solves the technical problems that the whole utilization rate of the battery pack after disassembly is low in the prior art, more situations are often abandoned due to short-plate batteries, and the situation that the number of battery cores of the whole battery pack is insufficient and the battery pack cannot be assembled easily is solved.
Description
Technical Field
The application relates to the technical field of retired power battery recycling, in particular to a short-plate battery isolation device of a retired power battery.
Background
With the vigorous development of the domestic electric automobile industry, the loading capacity of the power battery used by the electric automobile is also increased year by year. By the end of 2018, the reserved quantity of electric vehicles in China reaches 261, power batteries which are put into the market early are expected to come into retirement, the accumulated scale of retired power vehicles is expected to exceed 20GWH by 2020, and the problem of recycling and reusing the power batteries is hidden under the surface of luxurious development of the electric vehicles.
The performance requirement of the electric automobile on the power battery is high, the storage battery is discharged at the current of 1.5I3(A) at the temperature of 20 +/-2 ℃ according to the 6.2.11 cycle life regulation in QC/T743-. In order to ensure the power performance, driving range and safety performance during operation of the electric automobile, the electric automobile must be replaced, and the replaced battery is called an 'retired power battery'.
The retired power battery which is usually replaced from the electric automobile still has higher residual capacity and utilization value, and after being screened and regrouped and recombined, the retired power battery can be applied to scenes such as low-speed electric vehicles, mopeds, direct-current power supplies, micro-grids and the like, and also can be applied to energy storage occasions with relatively good running environment, relatively mild charging and discharging working conditions and relatively low requirements on battery performance, so that the echelon utilization of the retired power battery is realized, and the pressure of recovery processing is relieved.
However, retired power batteries are diverse in types, varied in performance, and have great discrepancies. In addition, short plate batteries are usually present in the whole battery pack, which causes problems of low availability, difficult matching, inflexible access and the like in the echelon utilization of the retired power battery.
The short plate batteries in the retired power battery have obvious performance reduction, so that the overall performance is influenced, the whole battery pack is withdrawn from use in advance, and potential safety hazards may exist.
Generally, the whole battery pack needs to be disassembled, and the short-plate batteries are removed from the whole battery pack, so that not only is the disassembling and recombining process complicated, but also other batteries in the whole battery pack may be damaged, and hidden dangers are left. The method for processing the retired power battery with less short-plate batteries comprises the following steps: the whole battery pack is disassembled in the form of battery modules, then the battery modules are sorted and assembled in units, and the battery modules containing the short-plate batteries are abandoned. Because the connection between the battery module adopts modes such as screw to fix usually, disassemble simple relatively, the work load is low, but the holistic utilization ratio of battery package after disassembling is lower, often can appear abandoning because the short plate battery with more the condition, the battery core quantity of whole group battery package is not enough and the condition of can't joining in marriage the group appears easily.
SUMMERY OF THE UTILITY MODEL
The application provides a short plate battery isolating device of retired power battery, has solved among the prior art because the connection between the battery module adopts modes such as screws usually to fix, and it is relatively simple to disassemble, and the work load is low, but the holistic utilization ratio of battery package after disassembling is lower, often can appear abandoning because the short plate battery and use more condition, the electric core quantity that appears whole group battery package easily is not enough and the technical problem of the condition of can't joining in marriage the group.
The application provides a short plate battery isolating device of retired power battery, includes:
the battery module comprises at least one short plate battery, and the short plate battery is connected into the isolation gating configuration matrix after being bridged by a bypass;
the isolation gating configuration matrix is connected with fuses in series at two ends of the short-plate battery, and positions of short splicing pieces are reserved for mounting the short splicing pieces;
and measuring interfaces are reserved at two ends of the short plate battery and are used for being connected to the trusteeship monitoring circuit.
Optionally, the managed monitoring circuit comprises a plurality of gating circuits, each gating circuit for connecting an isolated short-plate battery.
Optionally, the managed monitoring circuit further comprises a differential amplifying circuit for connecting a plurality of gating circuits.
Optionally, the collection wire harness of the battery module is connected to a universal motherboard.
Optionally, the trusteeship monitoring circuit is arranged on a daughter board, and the daughter board is plugged into a universal mother board provided with the collection wiring harness of the battery module.
According to the technical scheme, the embodiment of the application has the following advantages:
in this application, a short-plate battery isolating device of retired power battery is provided, include:
the battery module comprises at least one short plate battery, and the short plate battery is connected into the isolation gating configuration matrix after being bridged by a bypass;
the isolation gating configuration matrix is connected with fuses in series at two ends of the short-plate battery, and positions of short splicing pieces are reserved for mounting the short splicing pieces;
and measuring interfaces are reserved at two ends of the short plate battery and are used for being connected to the trusteeship monitoring circuit.
The application provides a pair of short plate battery isolating device of retired power battery, through carrying out static cross-over connection to the short plate battery in the retired power battery, need not disassemble whole group battery or monomer electric core, avoided the damage to the destruction of group battery structure and other electric cores, the monomer electric core that has remain the short plate battery is in former system, both can satisfy the requirement of whole group battery uniformity, also can realize lower transformation time and cost, good economic nature and adaptability have. And for the isolated short-plate battery, the acquisition wiring harness does not need to be rearranged, the original wiring harness is used, and the isolation gating configuration matrix is matched for adjustment and configuration, so that the compatibility of the isolation results of different short-plate batteries can be flexibly realized, and the isolated short-plate battery is managed and monitored by adopting an independent channel, so that the isolated short-plate battery is ensured to be in a known and controllable state, and the safety and stable operation of the recombined retired power battery are ensured. The utility model provides a retired power battery processing apparatus has solved among the prior art because the connection between the battery module adopts modes such as screws usually to fix, disassembles simple relatively, and the work load is low, but the holistic utilization ratio of battery package after disassembling is lower, often can appear because the short slab battery abandons the more condition, the electric core quantity of whole group battery package appears easily not enough and the technical problem of the condition of can't joining in marriage the group.
Drawings
Fig. 1 is a schematic diagram of an isolation bypass of an embodiment of a short plate battery isolation device for decommissioned power batteries provided herein;
FIG. 2 is a schematic illustration of custody monitoring of one embodiment of a short plate battery isolation device for decommissioned power batteries as provided herein;
FIG. 3 is a circuit diagram of an isolation configuration matrix of one embodiment of a short plate battery isolation device for decommissioned power batteries as provided herein;
fig. 4 is a schematic structural view of a conventional battery management BMS;
fig. 5 is a schematic structural diagram of a short-plate battery isolation device for retired power batteries according to the present application;
fig. 6 is a monitoring signal flow diagram of a conventional battery management BMS;
fig. 7 is a monitoring signal flow diagram of a short-plate battery isolation device for retired power batteries according to the present application;
fig. 8 is a schematic view of voltage acquisition of a conventional battery management BMS;
fig. 9 is a schematic voltage acquisition diagram of a short-plate battery isolation device for retired power batteries according to the present application.
Detailed Description
In order to make the technical solutions of the present application better understood, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
Short plate battery: the power battery system is formed by connecting a plurality of single battery cells (cells) in series or in parallel through conductive connecting pieces (Bus-bar). The cells (cells) are grouped in the form of a whole battery Pack (Pack) or a plurality of battery modules (Module), and the cells in the same group are highly consistent in electrical parameters, performance and state.
Due to slight differences in manufacturing processes or materials of the battery cells, differences in operating temperatures caused by different locations in the arrangement of the battery cells, and differences in accuracy and errors in acquisition and equalization of Battery Management Systems (BMS), individual battery cells in the same group have great differences from other battery cells in terms of voltage, capacity, health degree, and the like. The deterioration of individual cells firstly reflects the difference in consistency with other cells, and further gradually spreads and affects the performance and state of the whole group of cells, and a barrel effect appears. At this time, the cell with poor consistency is called a "short plate battery", and a certain number of short plate batteries are usually contained in the retired power battery. When the retired power battery is used in a cascading manner, the number and the physical isolation positions of the short-plate batteries are determined according to the extreme difference requirement of the consistency of each single battery cell in the battery module, and the conductive connecting piece is subjected to the processes of splitting isolation and bridging bypass. Suppose BAT2 is the short slab battery in the battery module, carry out the bypass to this short slab battery and handle, then need not to take out the short slab battery from whole battery module, and then reduce and disassemble the link, improve work efficiency, reduce the cost of recycling, the later maintenance and the operation of being convenient for simultaneously more do benefit to the scale and use.
After the bypass bridging processing is performed on the short-plate battery in the battery module, although the short-plate battery isolated on the electrical physical connection is completely separated from other battery cores, the short-plate battery can still exist in the whole battery module in a static state for a long time as an independent individual and is influenced by the surrounding environment, and the characteristics of the battery core, such as voltage, temperature and the like, are still in an unknown state. If corresponding supervision measures are lacked, potential safety hazards still exist in the whole battery module, and therefore real-time online monitoring management is necessary to be carried out on relevant characteristic states of the battery core.
As for the isolated short-plate battery, in order to ensure the safe and stable operation of the battery module and the whole system, the short-plate battery needs to be independently monitored and managed on line, so as to ensure the stable performance and safe operation of the battery, and timely find and avoid the further deterioration of the short-plate battery.
In traditional battery management BMS or third party battery management BMS, be the both ends of connecting every monomer electricity core with the collection pencil, monitoring signal flow chart as shown in fig. 6 is inserted the collection terminal of battery management BMS device by the collection pencil, carries out multichannel control through simulation front end AFE, and reentrant ADC measures, gathers, analysis and subsequent processing by MCU.
While isolated managed monitoring improves over traditional battery management BMS in two ways:
firstly, because the short-plate battery is subjected to cross-over connection treatment on the main loop of the battery module, the original acquisition wiring harness cannot be used normally, and if the wiring harness is reprocessed and installed, time and labor are wasted and the cost is high, so that the improvement of adding an isolation gating configuration matrix before the AFE (analog front end) of the traditional battery management BMS (battery management system) is provided, the original acquisition wiring harness can be reused without reprocessing and installation;
secondly, after the short-plate battery is bridged, the short-plate battery is in a separate and isolated position in the battery module, an unmanned monitoring and management situation is formed, and certain potential fault hidden dangers exist.
The on-line monitoring and management of the short-plate battery needs to monitor key characteristic parameters such as cell voltage and temperature of the short-plate battery in real time, and in order to prevent the battery from being over-discharged, the situation that the voltage is too low and the deterioration is accelerated, a special electricity supplementing circuit is reserved as shown in fig. 5.
Isolation hosting: the power battery system is formed by connecting a plurality of single battery cells (cells) in series or in parallel through conductive connecting pieces (Bus-bar), so that the degradation and the decommissioning of the whole battery set are accelerated, the reuse of the decommissioned power batteries is influenced, and the development of subsequent echelon utilization is restricted.
Usually, a conductive connecting piece (Bus-bar) is fixed at the design position of the electric core pole column, plays roles of connection, fixation, safety protection and the like, and is high in disassembly difficulty and large in workload. According to the distribution condition of short plate batteries in the whole battery set, the mode of 'fixed point clearing' is adopted, under the condition that the whole battery set is not required to be disassembled, the existing short plate batteries are only cut and disassembled, and then the short plate batteries are bridged and bypassed through conductive connecting pieces such as copper bars and cables, so that the short plate batteries are isolated and bypassed. For the isolated short-plate battery, the isolated short-plate battery is kept in the whole battery set without being dismantled, the original wire harness of the whole battery set is kept, and the voltage, the current, the temperature and other electrical parameters of an independent channel are acquired, so that the isolated short-plate battery is managed and monitored, the isolated short-plate battery is ensured to be in a known and controllable state, and the safe and stable operation of the power battery after being recombined and used is ensured. The isolated trusteeship only uses different battery management hardware and strategies for short-plate batteries within the entire battery pack than for other cells in the entire battery pack.
For the isolated short-plate battery, the isolated short-plate battery is kept in the whole battery set without being detached, the original wiring harness of the whole battery set is kept, and the independent channel is adopted to collect the voltage, temperature and other electrical parameters of the isolated short-plate battery so as to realize the hosting and monitoring of the isolated short-plate battery and ensure that the isolated short-plate battery is in a known and controllable state so as to ensure the safe and stable operation of the power battery after being recombined and used.
In the traditional battery management BMS, all the battery cells are sequentially connected in series, leading-out wires at the head end and the tail end of each battery cell are respectively connected with a fuse F in series, and then the battery cells enter a special AFE acquisition chip for voltage sampling, wherein the acquisition mode is generally data acquisition of 8-channel, 12-channel and 16-channel battery cells. A voltage acquisition diagram of the conventional battery management BMS shown in fig. 8.
To the battery module that has the short plate battery, after the short plate battery is kept apart by the bypass, if adopt traditional battery management BMS and original pencil, because the positive negative pole of short plate battery still links to each other with certain passageway of gathering the chip, can cause the work of gathering the chip unusual, and can't carry out the voltage acquisition to normal electric core. In addition, for the short plate battery which is isolated, if the condition monitoring is needed, a new collecting wire harness is needed to be added. Therefore, in order to avoid the problems, according to the processing of the short plate batteries in the battery module, the short plate batteries are subjected to bypass bridging in the battery module, the hardware circuit of the management system of the batteries is also subjected to optimal design, the original wire harnesses are not required to be changed through the isolation gating matrix, the compatibility of different quantities of battery modules with different specifications can be flexibly realized through initialization configuration, and the transformation efficiency and the economical efficiency of the battery module are higher.
The embodiment of the application provides a short plate battery isolating device of retired power battery, has solved among the prior art because the connection between the battery module adopts modes such as screws usually to fix, and it is relatively simple to disassemble, and the work load is low, but the holistic utilization ratio of battery package after disassembling is lower, often can appear abandoning because the short plate battery and use more condition, the electric core quantity that appears whole group battery package easily is not enough and the technical problem of the condition of can't joining in marriage the group.
For ease of understanding, referring to fig. 1-3, fig. 1 is a schematic diagram of an isolation bypass of an embodiment of a short plate battery isolation device for decommissioned power batteries provided herein; FIG. 2 is a schematic illustration of custody monitoring of one embodiment of a short plate battery isolation device for decommissioned power batteries as provided herein; FIG. 3 is a circuit diagram of an isolation gating matrix of one embodiment of a short plate battery isolation device for decommissioned power batteries as provided herein;
this application first aspect provides a short plate battery isolating device of power battery retires, includes:
the battery module comprises at least one short plate battery, and the short plate battery is connected into the isolation gating configuration matrix after being bridged by a bypass;
the isolation gating configuration matrix is connected with fuses in series at two ends of the short-plate battery, and positions of short splicing pieces are reserved for mounting the short splicing pieces;
and measuring interfaces are reserved at two ends of the short plate battery and are used for being connected to the trusteeship monitoring circuit.
It should be noted that, as shown in the circuit diagram of fig. 2, short tabs are reserved between the lead-out wires at both ends of each battery, so as to form an isolation gating configuration matrix. Under the normal operating condition of the battery module, all the battery voltages of the battery module can be sequentially collected by using the special AFE chip, for example, the voltage of the battery 1# is Uab, the voltage of the battery 2# is Ubc, and so on. When battery # 2 needs to be managed, fuse F1 can be removed and shorting tab F2A installed. At this time, Uac ═ Uab is the voltage of battery 1#, Ubc ═ 0 indicates that the data of the dedicated AFE chip can be normally collected.
Through a specially reserved measurement interface, the acquisition signals of the short-plate battery are separated by the isolation gating configuration matrix and are connected to the hosting monitoring circuit, so that the voltage and other parameters of the short-plate battery can be monitored in real time.
Further, the hosting monitoring circuit comprises a plurality of gating circuits, and each gating circuit is used for connecting the isolated short-plate batteries.
Further, the managed monitoring circuit further comprises a differential amplifying circuit for connecting the plurality of gating circuits.
It should be noted that, because the voltage of the whole battery pack cluster is high, the distribution position of the short-plate battery in the cluster is unknown, if the positive and negative poles of the short-plate battery are directly connected to the ADC, the ADC may be damaged or even a safety accident may be caused due to the extremely high common-mode voltage generated by the short-plate battery. As shown in fig. 9, the influence of high common mode voltage can be effectively isolated by the gating circuit of the short plate battery, so that the signal entering the post-stage acquisition circuit is within the acceptable range of the ADC.
Furthermore, the collection wire harness of the battery module is connected to the universal motherboard.
It should be noted that the collection harness of the battery module may be connected to a generalized motherboard, the isolation trusteeship circuit is a daughter board, and the isolation trusteeship circuit is connected in series before the analog front end AFE, and the collection harness of the battery module shares a motherboard communication link of the battery module for transmission through a CAN or RS485 communication bus. Data exchange and state monitoring can be realized by configuring the battery module.
Furthermore, the trusteeship monitoring circuit is arranged on the daughter board, and the daughter board is connected to a universal mother board of the collection wiring harness provided with the battery module in an inserting mode.
It should be noted that the whole circuit of the hosting monitoring circuit can be embedded in the conventional battery management BMS in a mother-daughter board manner by adopting an independent board card manner. Because the transformation is carried out in the battery management unit, the space outside the equipment and redundant wiring harnesses are not occupied, the implementation difficulty is low, and the economy is good.
In addition, this trusteeship monitoring circuit also can independently be external unit alone (external isolation trusteeship collection system), and with the cooperation of third party battery management system series connection, compatible original BMS and battery module connection pencil only need increase one and keep apart trusteeship collection board and BMS connection pencil, possess better flexibility and suitability.
The above embodiments are only used for illustrating the technical solutions of the present application, and not for limiting the same; although the present application has been described in detail with reference to the foregoing embodiments, it should be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions in the embodiments of the present application.
Claims (5)
1. A short plate battery isolation device of retired power battery is characterized by comprising:
the battery module comprises at least one short plate battery, and the short plate battery is connected into the isolation gating configuration matrix after being bridged by a bypass;
the isolation gating configuration matrix is connected with fuses in series at two ends of the short-plate battery, and positions of short splicing pieces are reserved for mounting the short splicing pieces;
and measuring interfaces are reserved at two ends of the short plate battery and are used for being connected to the trusteeship monitoring circuit.
2. The short plate battery isolation device for decommissioned power batteries according to claim 1, wherein the escrow monitoring circuit comprises a plurality of gating circuits, each gating circuit for connecting an isolated short plate battery.
3. The short plate battery isolation device for decommissioned power batteries according to claim 2, wherein the escrow monitoring circuit further comprises a differential amplification circuit for connecting a plurality of gating circuits.
4. The short plate battery isolation device for decommissioned power batteries according to claim 1, wherein the collection harness of the battery module is connected to a universal motherboard.
5. The short-plate battery isolation device for retired power batteries according to claim 1, wherein the hosting monitoring circuit is disposed on a daughter board, and the daughter board is plugged into a universal mother board of a collection harness on which the battery module is installed.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110867619A (en) * | 2019-12-24 | 2020-03-06 | 珠海瓦特电力设备有限公司 | Short-plate battery isolation device and method for retired power battery |
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| CN110867619A (en) * | 2019-12-24 | 2020-03-06 | 珠海瓦特电力设备有限公司 | Short-plate battery isolation device and method for retired power battery |
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