CN209486509U - Load devices and load cells for slave controller testing - Google Patents

Abstract

This application discloses a kind of load devices and load unit for from controller test, the load unit includes n load elements electrically connected to one another in series, n is equal to the number with battery cell included by the minimum combination unit of the battery pack corresponding to the controller, and each load elements simulate each single battery core of the minimum combination unit in the battery pack.The load unit of the application can be compatible a variety of from controller from controller test.

Description

Load devices and load cells for slave controller testing

technical field

The present application relates to the field of testing devices, more specifically, to a load device and a load unit used for testing slave controllers in a battery management system.

Background technique

In pure electric vehicles and hybrid vehicles, the battery management system is the core device in the whole vehicle. In the battery management system, the slave controller used to perform tasks such as voltage measurement, temperature measurement and thermal management plays a pivotal role, especially the slave controller monitors the voltage status of the single battery during the system operation.

In different models of electric vehicles or hybrid vehicles, it is often necessary to configure battery packs with different capacities. The needs for different capacities of battery packs are mostly realized through different connection methods of single batteries. For battery packs with different connection methods, different slave controllers need to be designed for their monitoring.

In the process of vehicle design and finalization, the slave controller needs to be tested and verified after the slave controller is initially selected. Since it is necessary to configure different test loads for different slave controllers in the traditional verification process, when a type of slave controller is tested, the test load corresponding to the type of slave controller is basically discarded.

Therefore, how to obtain a test load compatible with various slave controllers in the slave controller test has become a technical problem to be solved in this field.

Utility model content

In view of this, the present application proposes a load unit for testing slave controllers, so as to achieve the purpose of being compatible with various slave controllers for testing.

According to the present application, a load unit for testing a slave controller is proposed, the load unit includes n load elements electrically connected in series with each other, and n is equal to the minimum combined unit of the battery pack corresponding to the slave controller. The number of battery cells, each load element simulates each single cell of the smallest combined unit in the battery pack.

Preferably, the n is a multiple of 6, including 6, 12, 24, 36, 48, 72, and 108.

Preferably, the load element is a voltage dividing load element.

Preferably, the voltage dividing load elements are resistors R1, . . . , Rn.

Preferably, the resistance of the resistor is 50-150 ohms, preferably 80-120 ohms, most preferably 100 ohms.

Preferably, both ends of the load unit are provided with electrical connectors.

Preferably, both ends of each resistor of the load unit are connected to a pin P for connecting to the slave controller to be tested, and any two adjacent resistors share a middle pin between them.

Preferably, the load device includes a plurality of the above-mentioned load units, and the plurality of load units are connected in series and/or in parallel.

Preferably, the load device includes a plurality of load units connected in series and connected to the same slave controller.

Preferably, the load device includes a plurality of load units connected in parallel and each load unit is connected to a respective slave controller.

According to the technical solution of the present application, load elements corresponding to the number of battery cells in the minimum combined unit of the battery pack are connected in series to each other to form a load unit. Therefore, each load element can simulate each single cell of the smallest combined unit in the battery pack, and the composed load unit can simulate the smallest combined unit in the battery pack. When testing different slave controllers, multiple load units can be combined as needed to form load devices corresponding to various models of slave controllers, thereby simulating and reproducing the actual working conditions of the slave controllers. Therefore, using the technical solution of the present application, it is possible to be compatible with various slave controllers in the slave controller test.

Other features and advantages of the present application will be described in detail in the detailed description that follows.

Description of drawings

The accompanying drawings, which constitute a part of this application, are used to provide a further understanding of the application, and the schematic embodiments of the application and their descriptions are used to explain the application. In the attached picture:

Fig. 1 is a schematic diagram of a load unit according to a preferred embodiment of the present application;

FIG. 2 to FIG. 5 are respectively schematic diagrams of testing slave controllers using load devices according to multiple embodiments of the present application.

Detailed ways

The technical solutions of the present application will be described in detail below with reference to the accompanying drawings and in combination with implementation manners.

As shown in Figures 1 and 2, the load unit used for testing the slave controller provided by the present application includes n load elements electrically connected in series with each other, and n is equal to the minimum combined unit of the battery pack corresponding to the slave controller. The number of battery cells included, each load element simulates each single cell of the smallest combined unit in the battery pack.

The smallest unit of a battery pack is each single battery or single cell. In the process of assembling a large number of single cells or single cells to form a battery pack, usually several single cells or single cells are connected in series to form a battery unit, and then many battery cells are connected in series or in parallel. Thus forming the whole battery pack. Therefore, the so-called "minimum combination unit of the battery pack" refers to the above-mentioned "battery unit" required in the process of using a single battery or a single cell to form a battery pack (complete power battery device).

In the solution of the present application, the number of load elements in the load unit is equal to the number of battery cells in the smallest combined unit of the battery pack, and the load elements are connected in series to form a load unit. Therefore, each load element can simulate each single cell of the smallest combined unit in the battery pack, and the composed load unit can simulate the smallest combined unit in the battery pack. When testing different slave controllers, multiple load units can be combined as required to form load devices corresponding to various types of slave controllers.

According to the current combination of power battery packs, the n is generally a multiple of 6, and can be 6, 12, 24, 36, 48, 72, or 108. For other occasions, n can be a multiple of 2, 3, 4, 5, 7, 8 or 9.

Preferably, the load element is a voltage-dividing load element, so as to adapt to the detection function of the battery voltage by the slave controller. The voltage-dividing load element can be an inductor or a resistor, but is preferably a plurality of resistors R1, ..., Rn (R1', ..., Rn'; or R1", ..., Rn"), as shown in the figure. The resistance value of the resistor may be 50-150 ohms, preferably 80-120 ohms, most preferably 100 ohms.

As shown in FIG. 2 , electrical connectors (not shown) are provided at both ends of the load unit, preferably tool-free quick connectors, so as to realize quick electrical connection with an external power supply.

As shown in FIG. 1 and FIG. 2 , both ends of each load element are connected with pins for connecting to the slave controller to be tested, and any two adjacent load elements share a pin in the middle of them. Therefore, when testing the slave controller, both ends of the load unit are connected to a voltage source, and the pins at both ends of each load element are connected to the slave controller to be tested, as shown in FIG. 2 . By adjusting the input voltage of the power supply, changing the voltage value at both ends of the load element, and simulating the different voltage states at both ends of each single cell, the test of the slave controller is realized.

As mentioned above, when different slave controllers need to be tested, the above load units can be electrically connected in series and/or in parallel to obtain a load device. The scheme of the load device is described below with reference to FIGS. 3 to 5 .

In the series connection mode, the load device may include multiple load units, and the multiple load units are connected in series and connected to the same slave controller, as shown in FIG. 3 and FIG. 4 . In FIG. 3, two load cells are connected in series; in FIG. 4, three load cells are connected in series. Of course, the technical solution of the present application is not limited to the series connection of three load units, and more load units, such as 5, 6, 8 or 10, can be connected in series to meet the requirements of different working conditions.

In the parallel connection mode, the load device may include a plurality of load units connected in parallel and each load unit is respectively connected to its own slave controller, as shown in FIG. 5 .

In the technical solution shown in FIG. 5 , multiple test load units are electrically connected in parallel, and multiple slave controllers are connected in parallel to their respective load units, which can support simultaneous testing work of multiple slave controllers. Although in the scheme shown in FIG. 5 , three load units are connected in parallel, the present application is not limited thereto, and more load units may also be connected in parallel. In addition, it is also possible to connect a plurality of load units in series, and then connect other series load units in parallel.

It can be known from the above description that according to the technical solution of the present application, when testing different slave controllers, multiple load units can be combined as required to form load devices corresponding to various types of slave controllers.

The preferred embodiments of the present application have been described in detail above, but the present application is not limited to the specific details in the above-mentioned embodiments. Within the scope of the technical concept of the present application, various simple modifications can be made to the technical solutions of the present application. These simple modifications All belong to the scope of protection of this application.

In addition, it should be noted that the various specific technical features described in the above specific embodiments can be combined in any suitable way if there is no contradiction. The combination method will not be described separately.

In addition, any combination of various implementations of the present application can also be made, as long as they do not violate the idea of the present application, they should also be regarded as the disclosed content of the present invention.

Claims (12)

1. for the load unit from controller test, which is characterized in that the load unit includes n electrically connected to one another in series Load elements, n are equal to the number with battery cell included by the minimum combination unit of the battery pack corresponding to the controller, Each load elements simulate each single battery core of the minimum combination unit in the battery pack.

2. load unit according to claim 1, which is characterized in that the n be 6 multiple, including 6,12,24,36, 48、72、108。

3. load unit according to claim 1, which is characterized in that the load elements are dividing load element.

4. load unit according to claim 3, which is characterized in that the dividing load element is resistance R1 ... ..., Rn。

5. load unit according to claim 4, which is characterized in that the resistance value of the resistance is 50-150 ohm.

6. load unit according to claim 5, which is characterized in that the resistance value of the resistance is 80-120 ohm.

7. load unit according to claim 6, which is characterized in that the resistance value of the resistance is 100 ohm.

8. load unit according to any one of claims 1-7, which is characterized in that the both ends of the load unit are all provided with It is equipped with electrical connector.

9. load unit according to claim 8, which is characterized in that each resistance both ends of the load unit are all connected with Have for being connected to the pin to be measured from controller, the adjacent resistance of any two shares a pin among the two.

10. for from the load device of controller test, which is characterized in that the load device include it is multiple according to claim 1- Load unit described in any one of 9, multiple load unit are connected in series with each other and/or are connected in parallel.

11. load device according to claim 10, which is characterized in that the load device includes multiple load units, should Multiple load units are connected in series and are connected to same from controller.

12. load device according to claim 10, which is characterized in that the load device includes multiple load units, should Multiple load units are connected in parallel and each load unit be connected to it is respective from controller.