A battery matching method and a battery matching system

Abstract

The application relates to the technical field of battery matching, and discloses a battery matching method and a battery matching system, which comprise the following steps: step one: measuring the capacity, voltage and internal resistance of all battery monomers constituting a battery pack, and finally weighing the weight of the battery pack one by one, so as to ensure that the performance and various parameters of all battery monomers are completely same and within a certain error allowable range. According to the application, the voltage, internal resistance, capacity and weight of all battery monomers are measured before the battery monomers are matched, the performance of the battery monomers is ensured to be same, the weight of the battery monomers is ensured to be same, then the performance change of the battery monomers in the discharging process is monitored, the performance in the discharging process is ensured to be same, the voltage and internal resistance change of the battery pack and the voltage and internal resistance change of the battery monomers are monitored one by one in the process of assembling and connecting, the performance influence of the battery monomers after being assembled is avoided, the overall performance of the final battery pack is ensured, and the safety hidden danger is avoided.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of battery matching, in particular to a battery matching method and a battery matching system. BACKGROUND

[0002] At present, electric vehicles have high requirements for the power and energy of power sources, and single batteries need to be combined to provide greater power and energy. Battery matching is to connect multiple batteries together to form a battery pack that can be used normally. Matching is to ensure the consistency of the performance of each cell in a battery, including voltage, internal resistance, etc., and not just capacity. Therefore, the performance of the batteries must be completely consistent during battery matching to ensure the performance and quality of the battery pack.

[0003] During actual matching, the voltage, capacity, and internal resistance of all battery monomers are measured, and then the battery is connected and assembled. However, during the matching process, although the performance of individual batteries is consistent, when the battery components are connected in series, due to the mutual influence between the batteries or during discharging, there may be changes in voltage or internal resistance, which may ultimately affect the performance of the battery pack or pose a risk. In addition, the weight of the batteries must be equal during matching. Therefore, we propose a battery matching method and a battery matching system. SUMMARY

[0004] The present application aims to provide a battery matching method and a battery matching system. By measuring the voltage, internal resistance, capacity, and weight of all battery monomers before matching, the performance of the battery monomers is ensured to be the same and their weight is ensured to be the same. Then, the performance changes of the battery monomers during discharging are monitored to ensure that the performance is the same during discharging. The voltage and internal resistance changes of the battery pack and the voltage and internal resistance changes of the battery monomers are monitored during the assembly and connection process to avoid performance changes after the battery monomers are assembled, ensure the overall performance of the final battery pack, and avoid safety hazards. The problems raised in the background art are solved.

[0005] To achieve the above-mentioned purpose, the present application provides the following technical solution: a battery matching method, comprising the following steps:

[0006] Step 1: Measure the capacity, voltage, and internal resistance of all battery monomers that make up the battery pack, and finally weigh the weight of the battery pack one by one to ensure that the performance and parameters of all battery monomers are completely the same and within a certain error tolerance range;

[0007] Step two: discharge test and monitor temperature for each battery cell, monitor voltage and internal resistance of the battery cell during the test, ensure that the voltage and internal resistance of each battery cell during discharge remain equal and within the stable range of the standard;

[0008] Step three: assemble and connect the battery cells, connect them in series, and monitor the total voltage and total internal resistance after connecting each battery cell, ensure that the voltage and internal resistance increase the same amount when each battery cell is connected in series, and monitor the voltage and internal resistance of each battery cell during assembly to ensure that the voltage and internal resistance remain unchanged and the same;

[0009] Step four: after all assembly is completed, connect the battery pack to the load and then perform discharge test, monitor the total voltage and total internal resistance of the battery pack during the test, judge the change of the total voltage and total resistance and ensure that it is within the appropriate range, and monitor the voltage and internal resistance of all battery cells to ensure that the voltage and internal resistance of the battery cells change the same and remain stable;

[0010] Step five: remove the various ammeters used in the monitoring process to protect the battery pack.

[0011] As a preferred embodiment of the present application, the load device used in the discharge test of the battery cell in step two is the same as the load device used in the discharge test of the battery cell in step two.

[0012] As a preferred embodiment of the present application, the discharge test time in step two is not less than 2 hours, and the battery temperature needs to be continuously monitored during discharge.

[0013] As a preferred embodiment of the present application, the battery cells in step three are connected by wires, and the wires are connected to the battery cell terminals by bolts.

[0014] As a preferred embodiment of the present application, the discharge time of the battery pack in step four is not less than 1 hour.

[0015] As a preferred embodiment of the present application, the battery pack is protected and installed by using a special mounting rack and insulation structure of the battery pack in step five.

[0016] The present application also provides a battery grouping system, which comprises a computer, an electronic scale, a battery performance detector, a battery capacity detector, a temperature sensor and a load device;

[0017] The computer is used for receiving detection, monitoring data and data analysis, the electronic scale is used for weighing the weight of the battery monomer, the battery performance detector is used for monitoring the voltage and internal resistance of the battery, the battery capacity detector is used for measuring the capacity of the battery, the temperature sensor is used for monitoring the temperature data of the battery during discharging, and the load device is used for applying load to the battery to discharge it.

[0018] The computer comprises a host, a display screen and peripherals, the computer is connected to the electronic scale, the battery performance detector, the battery capacity detector and the temperature sensor through the host, the display screen is used for displaying images, the battery performance detector and the temperature sensor are both provided with a plurality of temperature sensors, and the temperature sensor is a patch type temperature sensor.

[0019] Compared with the prior art, the beneficial effects of the present application are as follows:

[0020] The present application ensures that the performance of the battery monomer is the same and the weight is the same by measuring the voltage, internal resistance, capacity and weight of all battery monomers before the battery monomers are matched, then monitors the performance change of the battery monomers during discharging, ensures that the performance is the same during discharging, monitors the voltage and internal resistance change of the battery pack and the voltage and internal resistance change of the battery monomer during the process of assembling and connecting, avoids the performance influence of the assembled battery monomers, ensures the overall performance of the final battery pack and avoids safety hazards, and after the battery pack is completely assembled, the performance of the whole and the single battery is checked to ensure its complete safety and reliability. BRIEF DESCRIPTION OF DRAWINGS

[0021] Other features, objects and advantages of the present application will become more apparent from the following detailed description of non-limiting embodiments, made with reference to the accompanying drawings:

[0022] Fig. 1 A flowchart of the battery matching method of the present application;

[0023] Fig. 2 A structural block diagram of the battery matching system of the present application. DETAILED DESCRIPTION

[0024] In order to make the technical means, creative features, purposes and effects of the present application easy to understand, the present application is further described below in combination with specific embodiments.

[0025] Please refer to Figs. 1-2 The present application provides a technical solution: a battery matching method, comprising the following steps:

[0026] Step one: measure the capacity, voltage and internal resistance of all battery monomers constituting the battery pack, and finally weigh the weight of the battery pack one by one, to ensure that the performance and parameters of all battery monomers are completely the same and within a certain error allowable range;

[0027] Step two: discharge test and temperature monitoring are carried out on all battery monomers one by one, and in the process of test, the voltage and internal resistance of battery monomers in the process of discharge are monitored synchronously, to ensure that the voltage and internal resistance of each battery monomer in the process of discharge are still equal and change within the stable range meeting the standard;

[0028] Step three: the battery monomers are assembled and connected, and the battery monomers are connected in series, and the total voltage and total internal resistance are monitored every time a battery monomer is connected, to ensure that the voltage and internal resistance increased by each series connection of a battery monomer are the same, and the voltage and internal resistance of each battery monomer are monitored during the assembly process, to ensure that the voltage and internal resistance are unchanged and the same during the assembly and connection process;

[0029] Step four: after all the assembly is completed, the battery pack is connected to the load, and then the discharge test is carried out, and in the process of test, the total voltage and total internal resistance of the battery pack are monitored, to judge the change of the total voltage and total resistance and ensure that they are within the appropriate range, and the voltage and internal resistance of all battery monomers are monitored, to ensure that the voltage and internal resistance of the battery monomers change the same and are stable;

[0030] Step five: remove various ammeters used in the monitoring process, and protect the battery pack.

[0031] Further, the load device used in the discharge test of the battery monomer in step two is a completely same power consumption device.

[0032] Further, the discharge test time in step two is not less than 2 hours, and the battery temperature needs to be continuously monitored during the discharge process.

[0033] Further, the battery monomers are connected by wires in step three, and the wires are connected to the power column of the battery monomers by bolts.

[0034] Further, the discharge time of the battery pack in step four should not be less than 1 hour.

[0035] Further, the battery pack is protected and installed by using the special mounting rack and insulation structure of the battery pack in step five.

[0036] The application also provides a battery matching system, which comprises a computer, an electronic scale, a battery performance detector, a battery capacity detector, a temperature sensor and a load device.

[0037] The computer is used for receiving detection, monitoring data and data analysis, the electronic scale is used for weighing the weight of the battery monomer, the battery performance detector is used for monitoring the voltage and internal resistance of the battery, the battery capacity detector is used for measuring the capacity of the battery, the temperature sensor is used for monitoring the temperature data of the battery during discharging, and the load device is used for applying load to the battery to discharge it.

[0038] The computer includes a host, a display screen and peripherals, the computer is connected to the electronic scale, the battery performance detector, the battery capacity detector and the temperature sensor through the host, the display screen is used for displaying images, the battery performance detector and the temperature sensor are both provided with a plurality of temperature sensors, and the temperature sensor is a patch type temperature sensor.

[0039] In the use of the battery matching method and the matching system thereof, the capacity, voltage and internal resistance of all battery monomers constituting the battery pack are measured, and finally the weight of the battery pack is weighed one by one to ensure that the performance and various parameters of all battery monomers are completely the same and within a certain error allowable range; all battery monomers are discharged and tested one by one and the temperature is monitored, in the process of testing, the voltage and internal resistance of the battery monomers during discharging are monitored synchronously to ensure that the voltage and internal resistance of each battery monomer during discharging are still equal and change within a stable range meeting the standard; the battery monomers are assembled and connected, the battery monomers are connected in series, and the total voltage and total internal resistance are monitored every time a battery monomer is connected to ensure that the voltage and internal resistance increased by each series connection of a battery monomer are the same, and the voltage and internal resistance of each battery monomer are monitored during the assembly process to ensure that the voltage and internal resistance remain unchanged and the same during the assembly process; after all the assembly is completed, the battery pack is connected to a load, and then discharged, in the process of testing, the total voltage and total internal resistance of the battery pack are monitored to determine the change of the total voltage and total resistance and ensure that they are within a suitable range, and the voltage and internal resistance of all battery monomers are monitored to ensure that the voltage and internal resistance of the battery monomers change the same and are stable; various ammeters used in the monitoring process are removed, and the battery pack is protected.

[0040] The above shows and describes the basic principles and main features of the present application and the advantages of the present application, for those skilled in the art, it is obvious that the present application is not limited to the details of the above exemplary embodiments, and the present application can be realized in other specific forms without departing from the spirit or essential characteristics of the present application. Therefore, from any point of view, the embodiments should be regarded as exemplary and non-limiting, the scope of the present application is defined by the appended claims rather than the above description, therefore all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be included in the present application. Any reference signs in the claims should not be regarded as limiting the claims involved.

[0041] Furthermore, it should be understood that although the description is made according to the embodiments, not every embodiment contains only one independent technical solution, and the description is made in this way only for the sake of clarity, and the person skilled in the art should consider the description as a whole, and the technical solutions in each embodiment can also be combined appropriately to form other embodiments that the person skilled in the art can understand.

Claims

1. A method of matching a battery, characterized by, It comprises the following steps: Step one: measure the capacity, voltage and internal resistance of all battery monomers constituting the battery pack, and finally weigh the weight of the battery pack one by one, to ensure that the performance and parameters of all battery monomers are completely the same and within a certain error allowed range; Step two: discharge test each battery monomer one by one and monitor the temperature, in the process of test, monitor the voltage and internal resistance of battery monomer in the process of discharge, to ensure that the voltage and internal resistance of each battery monomer in the process of discharge are still equal and change within the stable range of standard; Step three: assemble and connect the battery monomers, connect the battery monomers in series, and monitor the total voltage and total internal resistance after connecting each battery monomer, to ensure that the voltage and internal resistance increased by each series of battery monomers are the same, and monitor the voltage and internal resistance of each battery monomer during assembly to ensure that the voltage and internal resistance remain unchanged and the same; Step four: after all the assembly is completed, connect the load to the battery pack, and then perform discharge test, monitor the total voltage and total internal resistance of the battery pack during the test, judge the change of total voltage and total resistance and ensure that it is within the appropriate range, and monitor the voltage and internal resistance of all battery monomers to ensure that the voltage and internal resistance of battery monomers change the same and ensure stability; Step five: remove various ammeters used in the monitoring process, and protect the battery pack.

2. The method of claim 1, wherein: The load device used in the discharge test of the battery monomer in step two is completely the same.

3. The method of claim 1, wherein: The discharge test time in step two is not less than 2 hours, and the battery temperature needs to be monitored continuously during the discharge process.

4. The method of claim 1, wherein: In step three, the battery monomers are connected by wires, and the wires are connected to the battery monomer by bolts.

5. The method of claim 1, wherein: The discharge time of the battery pack in step four should not be less than 1 hour.

6. The method of claim 1, wherein: In step five, the battery pack is protected and installed by using the special mounting rack and insulation structure of the battery pack.

7. A battery matching system used in a battery matching method according to any one of claims 1 to 6, characterized by: It includes computer, electronic scale, battery performance detector, battery capacity detector, temperature sensor and load device; The computer is used for receiving detection, monitoring data and data analysis, the electronic scale is used for weighing the weight of the battery monomer, the battery performance detector is used for monitoring the voltage and internal resistance of the battery, the battery capacity detector is used for measuring the capacity of the battery, the temperature sensor is used for monitoring the temperature data of the battery during discharge, and the load device is used for applying load to the battery to discharge it; The computer includes host, display screen and peripheral equipment, the computer is connected to the electronic scale, battery performance detector, battery capacity detector and temperature sensor through the host, the display screen is used for displaying images, the battery performance detector and temperature sensor are provided with multiple, and the temperature sensor is a patch type temperature sensor.

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