CN214150984U - Battery testing device special for battery series-parallel connection topology - Google Patents
Battery testing device special for battery series-parallel connection topology Download PDFInfo
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- CN214150984U CN214150984U CN202023249632.1U CN202023249632U CN214150984U CN 214150984 U CN214150984 U CN 214150984U CN 202023249632 U CN202023249632 U CN 202023249632U CN 214150984 U CN214150984 U CN 214150984U
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Abstract
The utility model relates to a special battery testing device for battery series-parallel connection topology, belonging to the technical field of battery testing instruments; the system comprises a charging box, a discharging box and an auxiliary power supply, and also comprises a battery box with a variable battery topology and a control box, wherein a single battery is arranged in the battery box, the single battery is connected with a variable battery topology circuit, the variable battery topology comprises each battery configuration circuit and each parallel battery configuration circuit, each battery configuration circuit comprises current sampling resistors with at least 2 measuring ranges, and each current sampling resistor is connected with a selection switch in series; each parallel battery configuration circuit is connected with a short-circuit switch in parallel, and the selection switch and the short-circuit switch are in a double-mos switch form; the battery pack with the topological structure can be randomly grouped, and is used for detecting the influence of various charging and discharging on battery systems in different states under various topological environments.
Description
Technical Field
The utility model relates to a topological special battery testing arrangement of battery series-parallel connection belongs to battery test instrument technical field.
Background
At present, more and more lithium batteries are widely used in the fields of electric vehicles, energy storage and the like, and are connected together in a large number in a series-parallel connection mode in the using process. A special device for testing the serial-parallel connection topology of the batteries is provided.
SUMMERY OF THE UTILITY MODEL
The to-be-solved technical problem of the utility model is: the device can realize the battery pack with a topological structure in any grouping mode, and is used for detecting the influence of various charging and discharging on battery systems in different states under various topological environments.
The utility model discloses a special battery testing arrangement of battery series-parallel connection topology, including charging case, discharge chamber, auxiliary power supply, still include battery box, the control box that has variable battery topology, be provided with battery cell in the battery box, battery cell is connected with variable battery topology circuit, variable battery topology includes every battery configuration circuit and every battery configuration circuit, every battery configuration circuit includes the current sampling resistance of 2 at least ranges, every current sampling resistance all establishes ties there is selector switch; each parallel battery configuration circuit is connected with a short-circuit switch in parallel, and the selection switch and the short-circuit switch are in a double-mos switch mode.
The single batteries are connected together through each battery configuration circuit and each parallel battery configuration circuit in series, and system access and exit of the batteries are achieved. Each battery configuration circuit is configured with a current sampling resistor and a selection switch with different ranges, information of each single battery is collected under different power levels, the selection switch and the short-circuit switch both adopt a double mos switch form, and after the switches are switched off, the operation of partial batteries of the whole system is not influenced.
Preferably, an external output interface of the variable battery topology circuit is provided with a high-potential output switch and a short-circuit protection circuit, and the implementation modes all adopt an isolation mode.
Has good reliability.
Preferably, the high-potential output switch adopts an optical coupling isolation mode, an isolation power supply 12V1+ is configured on the potential of an output interface, and a control signal is applied to the driving circuit through the optical coupling; the short-circuit protection circuit adopts an optical coupling isolation mode, and a control point is the same as that of the driving circuit and acts between a driving position 12V1+ and a unit _ charge.
Short-circuit protection is timely, no spark is generated, and safety and reliability are achieved.
Preferably, each battery configuration circuit includes a first current sampling resistor J151, a second current sampling resistor J161, and a third current sampling resistor R678, the first current sampling resistor J151 is connected in series with a first selection switch, the second current sampling resistor J161 is connected in series with a second selection switch, and the third current sampling resistor R678 is connected in series with a third selection switch.
Any topology within 4 strings and 4 parallel can be combined according to the configuration, for example, a 3 parallel +2 parallel +3 parallel topology can be set, and the topology is used for simulating a scene that one battery capacity is 0 in a 4 string and 3 parallel system. Different batteries are placed in the system for testing, and the testing method is used for verifying the use scenes of batteries with different capacities or different types in parallel.
Compared with the prior art, the utility model discloses following beneficial effect has:
battery cluster and parallel connection topology special battery testing arrangement can realize arbitrary grouping mode topological structure group battery for the inspection group battery is under various topological environment, all kinds of charges and discharges the influence to different state battery system.
Drawings
Fig. 1 is a schematic structural diagram of a battery testing device dedicated for battery series-parallel topology according to the present invention;
fig. 2 is a circuit diagram of a variable battery topology circuit according to the present invention;
fig. 3 is a signal collection diagram of the control quantity and the collection quantity of the variable battery topology circuit according to the present invention;
fig. 4 is a circuit diagram of the high-potential output switch and the short-circuit protection circuit according to the present invention.
In the figure: 1. a battery box; 2. a charging box; 3. a discharge box; 4. a control box; 5. an auxiliary power supply; 6. a single battery; 7. each battery is provided with a circuit; 8. configuring a circuit for each parallel battery; 9. a short circuit switch; 10. a first selection switch; 11. a second selection switch; 12. and a third selector switch.
Detailed Description
The invention will be further described with reference to the accompanying drawings:
example 1
As shown in fig. 1-2, the battery testing device for battery series-parallel topology comprises a charging box 2, a discharging box 3, an auxiliary power supply 5, a battery box 1 with variable battery topology, and a control box 4, wherein a single battery 6 is arranged in the battery box 1, the single battery 6 is connected with a variable battery topology circuit, the variable battery topology comprises each battery configuration circuit 7 and each parallel battery configuration circuit 8, each battery configuration circuit 7 comprises a current sampling resistor with at least 2 measuring ranges, and each current sampling resistor is connected in series with a selector switch; each parallel battery configuration circuit 8 is connected in parallel with a short-circuit switch 9, and the selection switch and the short-circuit switch 9 both adopt a double-mos switch form.
The single batteries 6 are connected in series and in parallel through each battery configuration circuit 7 and each parallel battery configuration circuit 8, so that the system access and exit of the batteries are realized. Each battery configuration circuit 7 is configured with current sampling resistors and selection switches with different ranges, and acquires information of each single battery 6 under different power levels. The selection switch and the short-circuit switch 9 both adopt a double mos switch form, and the operation of a battery of the whole system is not influenced after the switches are disconnected.
Here, the charging box 2, the discharging box 3, and the auxiliary power supply 5 are common standard modules.
Each battery configuration circuit 7 includes a first current sampling resistor J151, a second current sampling resistor J161, and a third current sampling resistor R678, the first current sampling resistor J151 is connected in series with a first selection switch 10, the second current sampling resistor J161 is connected in series with a second selection switch 11, and the third current sampling resistor R678 is connected in series with a third selection switch 12.
As shown in fig. 3, each single battery 6 includes 3 sets of range switch control quantity, 3 sets of current sampling acquisition quantity, 1 voltage sampling acquisition quantity signal, and each single battery includes 1 short-circuit switch control quantity signal.
Any topology within 4 strings and 4 parallel can be combined according to the configuration, for example, a 3 parallel +2 parallel +3 parallel topology can be set, and the topology is used for simulating a scene that one battery capacity is 0 in a 4 string and 3 parallel system. Different batteries are placed in the system for testing, and the testing method is used for verifying the use scenes of batteries with different capacities or different types in parallel.
The external output interface of the variable battery topology circuit is provided with a high-potential output switch and a short-circuit protection circuit, and the implementation modes all adopt an isolation mode.
Has good reliability.
As shown in fig. 4, the high-potential output switch adopts an optical coupling isolation manner, an isolation power supply 12V1+ is configured on the output interface potential, and a control signal is applied to the driving circuit through the optical coupling; the short-circuit protection circuit adopts an optical coupling isolation mode, and a control point is the same as that of the driving circuit and acts between a driving position 12V1+ and a unit _ charge. The drive circuit and the protection circuit adopt the same circuit implementation form but opposite control logic. The reaction can be completed within 20us by actually testing the short circuit. When the metal conductor is used for short-circuit of the battery to output the positive and negative electrode tests, no spark is generated, and the method is safe and reliable.
Short-circuit protection is timely, no spark is generated, and safety and reliability are achieved.
The battery testing device special for the battery series-parallel connection topology has the working process as follows:
the single battery 6 is connected in series and in parallel through each battery configuration circuit 7 and each parallel battery configuration circuit 8, so that the system access and exit of the battery are realized, and the required topological environment is achieved. And selecting corresponding selection switches according to different power grades, configuring current sampling resistors with different ranges by each battery configuration circuit 7, and acquiring information of each single battery 6 at different power grades.
To sum up, battery series-parallel connection topology special battery testing arrangement can realize arbitrary grouping mode topological structure group battery for the inspection group battery is under various topological environment, all kinds of charges and discharges the influence to different state battery system.
Claims (4)
1. A special battery testing device for battery series-parallel connection topology comprises a charging box (2), a discharging box (3) and an auxiliary power supply (5), and is characterized by further comprising a battery box (1) with variable battery topology and a control box (4), wherein a single battery (6) is arranged in the battery box (1), the single battery (6) is connected with a variable battery topology circuit, the variable battery topology comprises each battery configuration circuit (7) and each parallel battery configuration circuit (8), each battery configuration circuit (7) comprises current sampling resistors with at least 2 measuring ranges, and each current sampling resistor is connected with a selector switch in series; each parallel battery configuration circuit (8) is connected with a short-circuit switch (9) in parallel, and the selection switch and the short-circuit switch (9) are in a double-mos switch form.
2. The battery testing device special for the battery series-parallel topology according to claim 1, wherein an external output interface of the variable battery topology circuit is provided with a high-potential output switch and a short-circuit protection circuit, and the implementation manner adopts an isolation manner.
3. The special battery testing device for the battery series-parallel topology according to claim 2, wherein the high-potential output switch adopts an optical coupling isolation mode, an isolation power supply 12V1+ is configured on the potential of an output interface, and a control signal is applied to the driving circuit through the optical coupling; the short-circuit protection circuit adopts an optical coupling isolation mode, and a control point is the same as that of the driving circuit and acts between a driving position 12V1+ and a unit _ charge.
4. The battery testing device special for battery series-parallel topology according to any one of claims 1-3, characterized in that each battery configuration circuit (7) comprises a first current sampling resistor J151, a second current sampling resistor J161, and a third current sampling resistor R678, wherein the first current sampling resistor J151 is connected with a first selection switch (10) in series, the second current sampling resistor J161 is connected with a second selection switch (11) in series, and the third current sampling resistor R678 is connected with a third selection switch (12) in series.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202023249632.1U CN214150984U (en) | 2020-12-29 | 2020-12-29 | Battery testing device special for battery series-parallel connection topology |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202023249632.1U CN214150984U (en) | 2020-12-29 | 2020-12-29 | Battery testing device special for battery series-parallel connection topology |
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| Publication Number | Publication Date |
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| CN214150984U true CN214150984U (en) | 2021-09-07 |
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| CN202023249632.1U Active CN214150984U (en) | 2020-12-29 | 2020-12-29 | Battery testing device special for battery series-parallel connection topology |
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