CN209947926U - Parallel storage battery pack system based on combined circulation cut-off device - Google Patents
Parallel storage battery pack system based on combined circulation cut-off device Download PDFInfo
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- CN209947926U CN209947926U CN201920946310.0U CN201920946310U CN209947926U CN 209947926 U CN209947926 U CN 209947926U CN 201920946310 U CN201920946310 U CN 201920946310U CN 209947926 U CN209947926 U CN 209947926U
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- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
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Abstract
The utility model discloses a parallel storage battery pack system based on a combined circulation cut-off device, which comprises a load power supply, wherein a plurality of batteries are connected in series with a battery module, and each battery module is connected in series with a circulation cut-off device; and all the circulating current cut-off devices are connected with the load power supply after being connected into the bus. The utility model discloses a system can include one or more battery module, can use the battery of different grade type, different producers, different old and new degree, different capacity and be in the same place, and every battery module series connection circulation end ware for a plurality of group battery are parallelly connected and form combination circulation end ware, can cut off the circulation current between the parallelly connected group battery. Meanwhile, a current and voltage detection circuit can be added to the combined circular current cut-off device.
Description
Technical Field
The utility model relates to a battery technology field, concretely relates to parallelly connected battery pack system based on combination circulation end ware.
Background
The voltage and the capacity of a single battery are low, and in practical application, the single battery is difficult to be directly used in a system, and a plurality of batteries are often required to be connected in series to improve the voltage. Due to the practical production process problems, each single battery has differences, so that some single batteries are fully charged in advance, and some single batteries are discharged in advance, thereby causing safety problems. Even if the management system is well made, the safety problem can be avoided, but the use conditions of early full charging, early discharging and the like can accelerate the attenuation of the backward batteries and increase the discreteness among the single batteries. The overall performance of the battery module is limited by the laggard single battery, and the capacity of the single battery can be exerted in the best case. Battery grouping must address the safety, life and range issues caused by cell uniformity.
Each cell has an upper and lower voltage limit within which the cell can operate properly, but once the cell voltage approaches this limit, the chemical properties of the cell will undergo a sudden change, and the discharge or charge must be stopped immediately, otherwise the cell will suffer irreversible damage.
The battery module group formed by a plurality of battery monomers greatly increases the inconsistency among the monomers, leads to different safety ranges of the battery voltage and greatly reduces the safety.
In the prior art, methods are disclosed to solve the above problems, for example, a single charge balance system is adopted, so that a single fault can be effectively eliminated, and the safety performance of the whole vehicle is ensured. The tail part of the battery module is provided with a printed circuit board, a plurality of power switches are arranged in the printed circuit board, one end of each power switch is connected with a battery monomer, and the other end of each power switch is connected with a medium-sized current collector. When the electric quantity of a certain battery in the battery module is different from that of other batteries due to overcharge, overdischarge and overhigh temperature, the current collectors can transfer energy among the batteries so as to prevent the voltage of the battery from exceeding a safety range and generating variation;
the patent publication CN104508940A discloses a cell balancing device and a balancing method, wherein the power part of the cell balancing device also adopts a DC/DC bidirectional conversion circuit in the load power supply technology, but the control circuit determines that they cannot directly sample the balanced two-cell connection point, and must obtain the sampled voltage through averaging and calculation, so that the truth and accuracy of the sampled voltage are lost, and the cost is very high. The patent with publication number CN102403764A discloses a lithium battery equalization circuit, which is prone to charging failure and even burning out due to the problems of the driving mode and the polarity selection of the power tube. However, the above method cannot solve the problem of parallel connection of a plurality of battery modules.
After a plurality of battery module connect in parallel, because the performance parameter of battery module is inequality, the internal resistance value of each battery module can appear great difference, and the electromotive force is also inequality, and the group counts more, and the probability that this kind of difference increases is big more. In this case, the battery module having a large electromotive force discharges the battery module having a small electromotive force, and a circulating current is formed between the parallel battery modules. When charging or discharging, the variation speed of the electromotive force of a single group of battery modules is different due to the difference of internal resistance and electromotive force, so that the inter-group circulation always exists in the charging and discharging process. When the number of the battery modules is increased, the probability of increasing the difference of the electromotive force is higher in the charging and discharging processes, so that the circulation current exists in each battery module, and the circulation current generated by each battery module is extremely high.
The load power supply is charged in a floating charging mode, although intelligent charging management is provided, the internal resistance of the batteries in the battery pack and the internal resistance of the batteries between the battery packs are different, so that the charging speed is different, and circulating current exists all the time.
When the difference value of the internal resistances of the batteries is large, the circulation current between the groups is large after the number of the battery modules is large, and the load power supply carries out floating charge on the batteries in most of time, so that each battery module can be considered to be full in the time, the circulation current can be considered to be loss, and meanwhile, the large circulation current can cause the problems of heating, accelerated aging of the battery modules with large electromotive force and the like.
When the power supply capacity of one battery module is insufficient, the power supply capacity is generally caused by backward single batteries in the battery module, and if the failed single battery cannot be searched, the whole battery set is scrapped. The voltage and electrolyte specific gravity of the lagging battery decrease rapidly during discharge and increase slowly during charge. The discharge of the whole battery pack is often affected by one or two lagging batteries. If a single battery in the battery module fails, the station can be quickly dropped.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing a parallelly connected storage battery system based on combination circulation end-stop can solve circulation problem and the balanced problem when the parallelly connected use of battery module among the prior art.
In order to achieve the above object, an embodiment of the present invention provides a parallel battery pack system based on a combined circular current cut-off device, including a load power supply, wherein the load power supply is a switch power supply or a UPS uninterruptible power supply; the load power supply is connected with the storage battery unit and the commercial power and is used for providing electric energy for the load;
the storage battery unit comprises a plurality of battery modules which are connected in parallel, each battery module is connected with a plurality of batteries in series, and the output voltages of the battery modules in the parallel circuit are the same;
each battery module is connected with an equalizer in parallel and used for equalizing the interior of the battery module, and each battery module is connected with a circulating current cut-off device in series; all the circulation cut-off devices are connected with the load power supply after being connected with the bus;
the circulation cut-off device comprises a shell, wherein the shell comprises an upper shell and a lower shell; a first diode and a second diode are packaged in the lower shell, and insulating heat-conducting colloid is filled between the first diode and the lower shell and between the second diode and the lower shell; the bottom of the lower shell is provided with a heat conducting fin which directly contacts with the insulating heat conducting colloid for heat dissipation, and the lower shell is provided with a mounting hole;
the upper shell is provided with two clamping grooves, the clamping grooves are used for mounting connecting sheets, and the two clamping grooves are respectively used for mounting a first connecting sheet and a second connecting sheet; the connecting piece is provided with a gasket and a bolt; a through hole is formed in the connecting piece, a threaded hole is formed in the position corresponding to the upper shell, and a bolt penetrates through the through hole and is fixed on the threaded hole; the cathode of the first diode and the anode of the second diode are both electrically connected with the first connecting sheet, and the anode of the first diode and the cathode of the second diode are electrically connected with the second connecting sheet.
Preferably, the load power supply is a direct current switching power supply; and a switch is arranged on a circuit of the load power supply and the storage battery unit.
Preferably, the types of the parallel battery modules include lead-acid batteries, nickel-metal hydride batteries, lithium ion batteries, nickel-cadmium batteries, sodium-sulfur batteries, nickel-zinc batteries, zinc-air batteries and flywheel batteries.
Preferably, the capacity of the parallel battery modules is 100AH ~ 1000 AH.
Preferably, the housing is made of an insulating plastic material or rubber material; the upper shell and the lower shell are bonded into a whole through strong glue or heat seal.
Preferably, a metal sleeve is arranged in the mounting hole; the gasket is L-shaped, the vertical part of the gasket is embedded into the clamping groove and fixed and then connected with the diode, and the horizontal part of the gasket is matched with the bolt.
Preferably, a stress ring is arranged between the bolt and the gasket.
Preferably, the heat conducting sheet is provided with a round hole, and the round hole corresponds to the mounting hole in position so that the mounting bolt can pass through the round hole conveniently.
Preferably, the heat conducting sheet is provided with a heat radiating plate, a through groove is formed in the connecting end of the heat radiating plate, the heat radiating plate is connected with the shell through a bolt, and a nut matched with the bolt is arranged in the through groove; the lower end of the heat dissipation plate is provided with heat dissipation fins.
To sum up, the utility model has the advantages of it is following:
1. the utility model discloses can establish ties into the parallelly connected use in mixture of battery module of the same voltage with the single section battery of multiple different grade type, can let the battery of different grade type use in mixture, improve the degree of utilization and the application range of single section battery, it has the balanced device to connect in parallel on every battery module simultaneously, it has the circulation end ware to establish ties, the circulation problem between the battery module after the overcharge and parallelly connected of the appearance of single section battery among the solution series battery module that can be fine has improved the life of whole battery module.
2. The utility model discloses a circulation end-stop can be used to the parallel capacitance of a plurality of battery module groups balanced, can reduce the influence of circulation, and the casing adopts upper casing and lower casing bonding equipment to fill insulating heat-conducting colloid and heat conduction piece cooperation heat dissipation in lower casing, realizes the access of external circuit through the installation connection piece in the draw-in groove of upper casing; is convenient and quick.
Drawings
Fig. 1 is a schematic view of a battery module mixing system according to an embodiment of the present invention;
fig. 2 is a schematic view of each battery module according to an embodiment of the present invention;
fig. 3 is a circuit diagram of an equalizer according to an embodiment of the present invention;
fig. 4 is a front view of the circular flow restrictor in an embodiment of the present invention;
fig. 5 is a top view of a circular flow restrictor in an embodiment of the present invention;
fig. 6 is a schematic view of a heat-conducting fin and a metal strip of the circular flow cut-off according to an embodiment of the present invention;
fig. 7 is a schematic view illustrating an assembly of a heat dissipating plate and a heat conductive plate of the circular current cut-off according to an embodiment of the present invention;
fig. 8 is a circuit diagram of two diodes in the lower housing of the circular current cut-off according to an embodiment of the present invention;
fig. 9 is a circuit diagram of two diodes connected to the battery pack in the lower case according to an embodiment of the present invention.
Wherein, 1, an upper shell; 2. a lower housing; 3. a heat conductive sheet; 4. mounting holes; 5. a card slot; 6. a first connecting piece; 7. a second connecting sheet; 8. a bolt; 9. a gasket; 10. a metal sheath; 11. a stress ring; 12. a heat dissipation plate; 13. a through groove; 14. a bolt; 15. and heat dissipation fins.
Detailed Description
The utility model provides a parallel storage battery pack system based on a combined circular current cut-off device, which comprises a load power supply, wherein the load power supply is a switch power supply or a UPS (uninterrupted power supply); the load power supply is connected with the storage battery unit and the commercial power and used for providing electric energy for the load. The load power supply is directly connected with the electric equipment, namely the load, and provides electric energy for the electric equipment. The load power supply can be a direct current switch power supply; a switch is arranged on a circuit of the load power supply and the storage battery unit; the switch may control the output of the power supply. Under the condition that the mains supply is connected, the mains supply is connected to a load power supply, the load power supply leads the mains supply into connection with the load, and under the condition that the mains supply is disconnected, the load power supply connects the electric energy of the switch power supply or the UPS into the load.
The storage battery unit comprises a plurality of battery modules connected in parallel, each battery module is connected with a plurality of batteries in series, and the output voltages of the battery modules in the parallel circuit are the same. Although the voltage can not increase after the battery modules are connected in parallel, the capacity of the whole storage battery unit can be greatly increased, so that the service life of the electric equipment is greatly prolonged. The utility model discloses an every battery module can establish ties and have a plurality of batteries, and battery module's output voltage is the same or close among the parallel circuit, and close meaning difference value control is in less within range.
The utility model discloses a battery module system of using with mixture can mix the battery of a plurality of different grade types and use to voltage between the single battery of series connection is the same, and the voltage of every battery module after parallelly connected is also the same, avoids self circulation phenomenon to appear.
The utility model discloses can utilize various battery types among the prior art, including but not limited to lead acid battery, nickel-hydrogen battery, lithium ion battery, nickel cadmium battery, sodium sulfur battery, nickel zinc battery, zinc air battery, flywheel battery parallelly connected battery module also can select according to actual conditions, and preferred capacity is 100AH ~ 1000 AH.
The utility model discloses a battery module is parallelly connected with the equalizer and is used for the equilibrium of battery module inside, and each battery module is connected with the circulation end-stop in series; and all the circulating current cut-off devices are connected with the load power supply after being connected into the bus.
The utility model discloses an every battery module is parallelly connected to have the balanced device to be used for the inside equilibrium of battery module, and every battery module is established ties and is had the circulation to end the ware and be used for the equilibrium between a plurality of battery modules. And the output ends of all the circulating current cut-off devices or the output ends of all the circulating current cut-off devices are connected with the load power supply after being connected into the bus. The utility model discloses an equalizer can adopt and can realize the balanced equalizer of battery wantonly among the prior art.
The inventor of the invention finds out through experiments that in order to solve the problem of circulating current among a plurality of battery modules, equipment is required to be used for blocking between a high-potential battery module and a low-potential battery module, so that the pressure difference among the battery modules with potential energy difference is small, and no current is generated among the battery modules. In order to solve the internal resistance difference between different batteries in a single battery module, bidirectional active equalization is required. When the capacity difference of the single batteries in the storage battery module reaches a certain degree, a part of the capacity of the batteries with higher capacity is transferred to the batteries with lower capacity in an energy lossless transfer mode, and bidirectional energy transfer can be directly carried out between any two batteries in the battery module, so that the purpose of capacity balance of the single batteries in the storage battery module is achieved.
The utility model discloses an equalizer carries out two-way initiative equilibrium to single section battery, through the equalizer, lets the voltage of every battery the same to promote the wholeness ability of battery module. After the equalizer is adopted, the consistency of each voltage is kept when the batteries are charged uniformly, so that each battery is fully charged. When the floating charging is carried out, the charging capacity of each battery is kept consistent through external balanced voltage. Therefore, the use of the equalizer can realize the mixing use between different old and new batteries and different performance batteries.
The utility model discloses a circulation that the circulation end stop between to battery module blocks. The circulation cut-off device can automatically adjust the output current of each battery module according to the capacity of the battery module and the curve characteristic of the current output by the battery module under specific voltage, so that all the battery modules can output the current outwards in all time periods, the discharge depth of the storage battery can be effectively improved, and the use capacity of the battery modules is increased. The circular current cut-off device is connected with the positive pole of the system in series through an electric element, and plays a role in blocking circular current and equalizing load current.
The utility model discloses a circulation end can select to have the circulation blocker that passes through electric current big, can pass through 100A, 160A, 200A, 300A electric current. The method can meet the condition of heavy load of the base station, and is particularly suitable for the actual conditions of high power and heavy current of the 5G base station.
The utility model provides a circulation end, including the shell, the shell includes casing 1 and lower casing 2. The shell is made of insulating plastic materials or rubber materials, and the upper shell and the lower shell are bonded into a whole through strong glue or heat seal. The shell provides the mounted position for whole rectifier, and the shell can be the cuboid, goes up the casing 1 and is uncovered towards the one end of casing 2 down, and casing 2 can both ends be uncovered down.
A first diode and a second diode are packaged in the lower shell 2, and insulating heat-conducting colloid is filled between the first diode and the second diode and the lower shell 2. The thermal colloid not only can be derived the heat that the diode produced fast, also can be with the diode is fixed in casing 2 down for the diode need not rely on modes such as bolt to fix, and the wiring foot of the diode after fixing still can be connected with the connection piece.
The bottom of lower casing 2 is provided with conducting strip 3, and conducting strip 3 directly dispels the heat with the contact of insulating heat-conducting colloid, is provided with mounting hole 4 on the lower casing 2. The bottom of the lower shell 2 can be provided with a platform, and the heat conducting fins 3 are arranged on the platform and can be fixed at the bottom of the lower shell 2 in a bonding mode.
The heat conducting fin 3 is provided with a heat radiating plate 12, a through groove 13 is arranged at the connecting end of the heat radiating plate 12, the heat radiating plate 12 is connected with the shell through a bolt, and a nut matched with the bolt is arranged in the through groove 13; the lower end of the heat dissipation plate 12 is provided with heat dissipation fins 14. The mounting hole 4 thus functions to allow the bolt to pass through for engagement with the nut.
Go up and be provided with two draw-in grooves 5 on the casing 1, draw-in groove 5 is used for the installation connection piece, and two draw-in grooves 5 are used for installing first connection piece 6 and second connection piece 7 respectively. The connecting sheet is directly fixed, and a gasket 9 and a bolt 8 are arranged on the connecting sheet; the bolt 8 is used for connecting the external lead wire with the rectifier. The gasket 9 is an L-shaped gasket 9, the vertical part of the gasket 9 is embedded into the clamping groove 5 and fixed and then connected with the diode, and the horizontal part is matched with the bolt 8.
The connecting piece is provided with a through hole, a threaded hole is formed in the position corresponding to the upper shell 1, and the bolt 8 penetrates through the through hole and is fixed on the threaded hole. Namely, the external lead is wound around the upper end of the bolt 8, and then the bolt 8 is screwed into the threaded hole to be fixed.
The cathode of the first diode and the anode of the second diode are both electrically connected with the first connecting sheet 6, and the anode of the first diode and the cathode of the second diode are electrically connected with the second connecting sheet 7.
In the optimized embodiment of the utility model, a metal sleeve 10 is arranged in the mounting hole 4; since the housing is made of an insulating material, the strength and hardness thereof are poor, and the fit with the bolt is easily damaged, so that the metal sleeve 10 is provided in the mounting hole 4. The metal sleeve 10 may be fixed in the mounting hole 4 with an interference fit.
The utility model discloses an in the preferred embodiment, be provided with stress ring 11 between bolt 8 and the gasket 9. The stress ring 11 is a circular ring formed by bending a cylindrical hard metal strip, the stress ring 11 can provide certain tension after the cable is installed on the bolt 8, so that the connection performance is more stable,
the utility model discloses an in the optimization embodiment, be provided with the round hole on the conducting strip 3, the round hole corresponds the construction bolt of being convenient for with the position of mounting hole 4 and passes through.
In the optimized embodiment of the utility model, the heat conducting fin 3 is provided with a heat radiating plate 12, a through groove 13 is arranged on the connecting end of the heat radiating plate 12, the heat radiating plate 12 is connected with the shell through a bolt 14, and a nut matched with the bolt is arranged in the through groove 13; the lower end of the heat dissipation plate 12 is provided with heat dissipation fins 14.
The utility model discloses a stop can play the effect of eliminating the circulation, has the rectification equilibrium effect after eliminating the circulation, and storage battery's external lead is connected with the positive negative pole of group battery, can be with the circulation stop establish ties to storage battery's external lead on can.
The utility model discloses a stop can play the effect of eliminating the circulation, has the rectification equilibrium effect after eliminating the circulation, and storage battery's external lead is connected with the positive negative pole of group battery, can be with the circulation stop establish ties to storage battery's external lead on can.
The utility model is formed by connecting two diodes in parallel; the diode referred to in this patent may be not only a schottky diode but also an ideal diode formed by a circuit. The utility model discloses describe the theory of operation, for example following take the schottky diode as the example to explain:
the Schottky diode is turned off when the forward voltage is lower than 0.5V; when the forward voltage is higher than 0.5V and lower than 0.7V, the circuit is half-on and unidirectional current flows; when the forward voltage is higher than 0.7V, the switch is fully opened, and the characteristic of unidirectional current is realized.
The utility model discloses make full use of schottky diode's above characteristic, two diodes are the back of connecting in parallel, use in battery control circuit, realize the function by of the circulation current between the battery of different energies.
Assuming that the voltage output by the switching power supply is 48V, all battery packs are 48V systems.
Firstly, under normal conditions, the commercial power of the switching power supply is 220V, and the output of the switching power supply is 48V.
1.1 when the battery voltage of the switching power supply is higher than the battery pack voltage by more than 0.7V, the upper diode of the circulation cut-off device is switched on, the lower diode is switched off, the switching power supply charges the storage battery, and the battery pack voltage rises.
1.2 when the storage battery is fully charged gradually, the voltage of the storage battery continuously rises, when the voltage of the switching power supply is only higher than the voltage of the battery pack by 0.5V, the upper diode of the circulating current cut-off device is half-on, the lower diode is off, the switching power supply trickle charges the storage battery, and the voltage of the battery pack continuously rises.
1.3 when the storage battery is fully charged, the voltage of the storage battery continuously rises, and when the voltage of the switching power supply is higher than the voltage of the battery pack by less than 0.5V, the upper diode of the circulation cut-off device is turned off, the lower diode is turned off, and the battery pack stops charging.
And secondly, after the mains supply is powered off, the storage battery pack of the backup power supply starts to supply power, and the switching power supply is still in a working state.
2.1 after the commercial power is cut off, when the voltage of the switch power supply is lower than the voltage of the storage battery by 0.7V, the upper diode of the circular current cut-off device is turned off, the lower diode is instantly turned on (the turning-on is the movement of electrons, basically, no time is needed, and the lower diode can be turned on as long as the turning-on voltage is reached), and the storage battery realizes the external power supply.
2.2 because the discharge capacity and the discharge curve of different group battery are different, the group battery voltage that must appear between the different group battery is the highest, and some group battery voltage is higher, has the condition that some group battery voltage is the lowest.
2.3 in the discharging process, when the voltage difference between the voltage of the battery pack and the switching power supply is greater than 0.7V, the upper diode of the circular current cut-off device is turned off, and the lower diode is turned on (unidirectional discharging), so that the battery pack and the highest voltage battery pack output current together, and the output power of the battery pack is determined by the characteristics of the battery pack.
2.4 in the discharging process, when the voltage difference between the voltage of the battery pack and the switching power supply is greater than 0.5V and less than 0.7V, the upper diode of the circular current cut-off device is turned off, and the lower diode is half-turned on (unidirectional discharging), so that the battery pack outputs current with the highest voltage battery pack, but the output current is relatively small, and the output power is also small.
2.5 in the discharging process, when the voltage difference between the voltage of the battery pack and the switching power supply is less than 0.5V, the upper diode of the circulation cut-off device is turned off, and the lower diode is turned off, so that the battery pack does not output current any more and can not be reversely charged.
Use the utility model discloses a circulation end ware has the convenience of charging, and the reserve battery is online at any time, can have the adaptivity according to its output current's of group battery self characteristic automatic adjustment size at any time during discharging, and can cut off the circulation between the different group batteries, promotes the characteristics of parallelly connected output capacity between the different storage battery by a wide margin. And the realization of the characteristics has extremely high cost performance.
While the present invention has been described in detail and with reference to the accompanying drawings, it is not to be considered as limited to the scope of the invention. Various modifications and changes may be made by those skilled in the art without inventive step within the scope of the appended claims.
Claims (7)
1. A parallel battery pack system based on a combined circular current cut-off device is characterized in that: the power supply comprises a load power supply, wherein the load power supply is a switching power supply or a UPS (uninterrupted power supply); the load power supply is connected with the storage battery unit and the mains supply and is used for providing electric energy for the load;
the storage battery unit comprises a plurality of battery modules which are connected in parallel, each battery module is connected with a plurality of batteries in series, and the output voltages of the battery modules in the parallel circuit are the same; each battery module is connected with an equalizer in parallel and used for equalizing the interior of the battery module, and each battery module is connected with a circulating current cut-off device in series; all the circulation cut-off devices are connected with the load power supply after being connected with the bus;
the circulation cut-off comprises a shell, and the shell comprises an upper shell and a lower shell; a first diode and a second diode are packaged in the lower shell, and insulating heat-conducting colloid is filled between the first diode and the lower shell and between the second diode and the lower shell; the bottom of the lower shell is provided with a heat conducting fin which directly contacts with the insulating heat conducting colloid for heat dissipation, and the lower shell is provided with a mounting hole;
the upper shell is provided with two clamping grooves, the clamping grooves are used for mounting connecting sheets, and the two clamping grooves are respectively used for mounting a first connecting sheet and a second connecting sheet; a gasket and a bolt are arranged on the connecting piece; a through hole is formed in the connecting piece, a threaded hole is formed in the position corresponding to the upper shell, and a bolt penetrates through the through hole and is fixed on the threaded hole; the cathode of the first diode and the anode of the second diode are both electrically connected with the first connecting sheet, and the anode of the first diode and the cathode of the second diode are electrically connected with the second connecting sheet.
2. The combined circular current cutoff based parallel battery pack system as claimed in claim 1 wherein: the types of the parallel battery modules comprise a lead-acid storage battery, a nickel-hydrogen storage battery, a lithium ion battery, a nickel-cadmium battery, a sodium-sulfur storage battery, a nickel-zinc storage battery, a zinc-air storage battery and a flywheel battery.
3. The combined circular current cutoff based parallel battery pack system as claimed in claim 1 wherein: the shell is made of an insulating plastic material or rubber material; the upper shell and the lower shell are bonded into a whole through strong glue or heat seal.
4. The combined circular current cutoff based parallel battery pack system as claimed in claim 1 wherein: a metal sleeve is arranged in the mounting hole; the gasket is L-shaped, the vertical part of the gasket is embedded into the clamping groove and fixed and then connected with the diode, and the horizontal part of the gasket is matched with the bolt.
5. The combined circular current cutoff based parallel battery pack system as claimed in claim 1 wherein: and a stress ring is arranged between the bolt and the gasket.
6. The combined circular current cutoff based parallel battery pack system as claimed in claim 1 wherein: and the heat conducting sheet is provided with a round hole, and the round hole corresponds to the mounting hole in position so as to facilitate the passing of a mounting bolt.
7. The combined circular current cutoff based parallel battery pack system as claimed in claim 1 wherein: the heat conducting fin is provided with a heat radiating plate, a through groove is formed in the connecting end of the heat radiating plate, the heat radiating plate is connected with the shell through a bolt, and a nut matched with the bolt is arranged in the through groove; and the lower end of the heat dissipation plate is provided with heat dissipation fins.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113619442A (en) * | 2021-08-23 | 2021-11-09 | 成都精锐环科技有限公司 | Electric vehicle energy management method and system based on distributed batteries |
| CN114123445A (en) * | 2021-12-27 | 2022-03-01 | 广东电网有限责任公司 | Storage battery standby circuit |
| CN114628763A (en) * | 2022-03-03 | 2022-06-14 | 河南豫清新能源产业有限公司 | Lithium battery grouping method for reducing parallel connection circulation current and bias current |
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2019
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113619442A (en) * | 2021-08-23 | 2021-11-09 | 成都精锐环科技有限公司 | Electric vehicle energy management method and system based on distributed batteries |
| CN114123445A (en) * | 2021-12-27 | 2022-03-01 | 广东电网有限责任公司 | Storage battery standby circuit |
| CN114628763A (en) * | 2022-03-03 | 2022-06-14 | 河南豫清新能源产业有限公司 | Lithium battery grouping method for reducing parallel connection circulation current and bias current |
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