Electrical connection structure of module box

Abstract

The utility model provides an electrical connection structure of a module box, which belongs to the technical field of module boxes and comprises a plurality of batteries, a voltage sampling connector, a temperature sampling connector, a BMU sampling interface connector, a first battery module, a second battery module, a third battery module, a BMU acquisition board, an external connection wire harness and an internal acquisition wire harness. The three battery modules are connected in series, the voltage sampling connector is connected with voltage acquisition points of the battery modules, the BMU sampling interface connector is connected with the BMU acquisition board, the internal acquisition wire harness is used for collecting voltage and temperature signals in the battery modules and transmitting the voltage and temperature signals to the BMU acquisition board, the BMU acquisition board is located outside the module box, and the BMU acquisition board is connected with the battery modules. Internal acquisition wire harnesses of the three battery modules are connected with an external connection wire harness through a voltage sampling connector and a temperature sampling connector, and the external connection wire harness is connected with a BMU sampling interface connector of the BMU acquisition board; and the external connecting wire harness connector adopts a pin dislocation design.

Description

Technical Field

[0001] The utility model belongs to the technical field of module boxes, and more specifically, relates to an electrical connection structure of a module box. Background Art

[0002] In application fields such as new energy vehicles and energy storage systems, as a core component of the energy storage unit, the electrical connection structure of the battery module box is directly related to the overall performance and safety of the system. The traditional electrical connection structure of the module box usually adopts a one-to-one or many-to-many independent acquisition scheme, that is, each battery module is equipped with a separate Battery Management Unit (BMU) or data acquisition module. Although this method met the basic requirements in the early development stage, with the progress of technology and the market's pursuit of high-efficiency and low-cost solutions, its drawbacks have gradually emerged.

[0003] In the traditional electrical connection structure of the module box, the battery cells inside each battery module are connected to their respective data acquisition modules through a complex wire harness network. These wire harnesses are responsible for transmitting key information such as the voltage and temperature of the battery cells to the BMS. Since the wire harness design of each module is often independent and not unified, there are relatively high interchangeability and compatibility barriers between different modules, increasing the complexity and cost of system integration. Drawbacks of the traditional electrical connection structure: Equipping each module with an independent data acquisition module not only increases the hardware cost, but also due to the lack of generality, the wire harness design and manufacturing costs are relatively high. The additional data acquisition modules and complex wire harness network significantly increase the total weight of the module, which is a major challenge for industries such as new energy vehicles that pursue lightweight design. The independent acquisition module and wire harness design make fault diagnosis and maintenance work complicated, requiring professional technicians to operate, increasing the maintenance time and cost. Due to the differences in wire harness design between different modules, it is easy to encounter compatibility problems when replacing or upgrading modules, limiting the flexibility and scalability of the system. Multiple independent data acquisition modules may have delays in data transmission and processing, affecting the response speed and overall performance of the system. Summary of the Utility Model

[0004] In view of this, the utility model provides an electrical connection structure of a module box, which solves the relatively high interchangeability and compatibility barriers between different modules in the traditional electrical connection structure of the module box and improves the flexibility of the system.

[0005] The utility model is implemented as follows:

[0006] The present utility model provides an electrical connection structure for a module box, including a plurality of batteries. Among them, it includes plug connectors, battery modules, a BMU acquisition board, an external connection harness, and an internal acquisition harness. The plug connectors include a voltage sampling plug connector, a temperature sampling plug connector, and a BMU sampling interface plug connector. The battery modules include a first battery module, a second battery module, and a third battery module. The first battery module, the second battery module, and the third battery module are connected in series. The voltage sampling plug connector is connected to the voltage acquisition points of the battery modules. The BMU sampling interface plug connector is connected to the BMU acquisition board. The internal acquisition harness is used to collect the voltage and temperature signals within the battery modules and transmit them to the BMU acquisition board. The BMU acquisition board is located outside the module box. The internal acquisition harnesses of the first battery module, the second battery module, and the third battery module are connected to the external connection harness through the voltage sampling plug connector and the temperature sampling plug connector. The external connection harness is connected to the BMU sampling interface plug connector of the BMU acquisition board;

[0007] Among them, the plug connectors of the external connection harness adopt a pin misalignment design.

[0008] Based on the above technical solution, an electrical connection structure for a module box of the present utility model can also be improved as follows:

[0009] Among them, the temperature sampling plug connector includes a first temperature sensor, a second temperature sensor, and a third temperature sensor. The first temperature sensor, the second temperature sensor, and the third temperature sensor are specifically resistors with a resistance value of 10,000 ohms.

[0010] The first temperature sensor, the second temperature sensor, and the third temperature sensor are the T1 temperature sensor, the T2 temperature sensor, and the T3 temperature sensor respectively, representing three resistors with a resistance value of 10,000 ohms. The resistance value is changed by temperature variation to achieve temperature sampling.

[0011] Furthermore, the internal acquisition harness includes fourteen battery positive electrode acquisition points and four battery negative electrode acquisition points. The battery positive electrode acquisition points are used to acquire the positive electrode voltages of fourteen batteries.

[0012] Furthermore, the battery negative electrode acquisition points include a first acquisition point, a second acquisition point, a third acquisition point, and a fourth acquisition point. The first acquisition point corresponds to the negative electrode voltage of the first battery; the second acquisition point corresponds to the negative electrode voltage of the eleventh battery; the third acquisition point corresponds to the negative electrode voltage of the eighth battery; the fourth acquisition point corresponds to the negative electrode voltage of the fourth battery.

[0013] Furthermore, the first temperature sensor is located at the first acquisition point, the second temperature sensor is located at the fourth acquisition point, and the third temperature sensor corresponds to the positive electrode acquisition point of the fourteenth battery.

[0014] T1 temperature sensor collects the negative electrode temperature of the first battery, T2 temperature sensor collects the negative electrode temperature of the fourth battery, and T3 temperature sensor collects the positive electrode temperature of the fourteenth battery.

[0015] Furthermore, the external connection harness adopts a pin misalignment design. Specifically, the first collection point and the second collection point respectively collect the negative electrodes of the batteries in the first battery module, the first collection point and the third collection point respectively collect the negative electrodes of the batteries in the second battery module, and the first collection point and the fourth collection point respectively collect the negative electrodes of the batteries in the third battery module.

[0016] Furthermore, the pin misalignment of the external connection harness of the first battery module is specifically that the last two vacant pins of the corresponding connector of the first battery module are not wired.

[0017] Furthermore, the pin misalignment of the external connection harness of the second battery module is specifically that the third last and the last vacant pins of the corresponding connector of the second battery module are not wired.

[0018] Furthermore, the pin misalignment of the external connection harness of the third battery module is specifically that the third last and the second last vacant pins of the corresponding connector of the third battery module are not wired.

[0019] Furthermore, the plug-in connector adopts a circlip type terminal design.

[0020] The beneficial effects of adopting the above improvement scheme are as follows: The plug-in connector adopts a tool-free, quick plug-and-play, circlip type terminal design, which improves the seismic firmness. At the same time, the installation and maintenance work are more convenient. The collection line can be directly inserted into the plug-in connector without using tools, greatly improving the work efficiency.

[0021] Compared with the prior art, the beneficial effects of a module box electrical connection structure provided by the present utility model are as follows:

[0022] Cost saving: The one-to-three design significantly reduces the hardware requirements, reduces the manufacturing cost of the module. At the same time, the unified harness design and the strategy of the external BMU board further reduce the harness and space costs;

[0023] Weight reduction: The optimized electrical connection structure greatly reduces the total weight of the module, which is particularly important for application scenarios pursuing lightweight design;

[0024] Convenient maintenance: The tool-free quick plug-and-play plug-in connector and the setting of the external BMU board greatly simplify the maintenance process, reducing the maintenance time and cost;

[0025] Enhanced compatibility: The unified harness design ensures high compatibility and interchangeability between different modules, facilitating the flexible configuration and upgrade of the system;

[0026] Efficiency improvement: The centralized data collection and processing mechanism improves the speed and accuracy of information transmission, enhances the system's response ability and overall performance. Description of the Drawings

[0027] In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the drawings required for use in the description of the embodiments of the present utility model will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the present utility model. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0028] Figure 1 It is an example diagram of the electrical connection structure of a module box;

[0029] Figure 2 It is an example diagram of the internal collection wire harness of the electrical connection structure of a module box;

[0030] Figure 3 It is a pin misalignment diagram of the battery module of the electrical connection structure of a module box;

[0031] In the drawings, the list of components represented by each reference numeral is as follows:

[0032] 1. Voltage sampling connector; 2. Temperature sampling connector; 3. BMU sampling interface connector; 4. First battery module; 5. Second battery module; 6. Third battery module; 7. BMU acquisition board; 8. External connection wire harness; 9. Internal collection wire harness; 91. First collection point; 92. Second collection point; 93. Third collection point; 94. Fourth collection point. Detailed Embodiments

[0033] To make the purpose, technical solutions, and advantages of the embodiments of the present utility model clearer, the technical solutions in the embodiments of the present utility model will be clearly and completely described below in conjunction with the drawings in the embodiments of the present utility model.

[0034] Such as Figure 1As shown in the figure, it is the first embodiment of an electrical connection structure of a module box provided by the present utility model. In this embodiment, it includes multiple batteries, including a plug-in connector, a battery module, a BMU acquisition board 7, an external connection harness 8, and an internal acquisition harness 9. The plug-in connector includes a voltage sampling connector 1, a temperature sampling connector 2, and a BMU sampling interface connector 3. The battery module includes a first battery module 4, a second battery module 5, and a third battery module 6. The first battery module 4, the second battery module 5, and the third battery module 6 are connected in series. The voltage sampling connector 1 is connected to the voltage acquisition point of the battery module. The BMU sampling interface connector 3 is connected to the BMU acquisition board 7. The internal acquisition harness 9 is used to collect the voltage and temperature signals inside the battery module and transmit them to the BMU acquisition board 7. The BMU acquisition board 7 is located outside the module box. The internal acquisition harnesses 9 of the first battery module 4, the second battery module 5, and the third battery module 6 are connected to the external connection harness 8 through the voltage sampling connector 1 and the temperature sampling connector 2. The external connection harness 8 is connected to the BMU sampling interface connector 3 of the BMU acquisition board 7;

[0035] Among them, the connectors of the external connection harness 8 adopt a pin misalignment design.

[0036] As Figure 2 shown in the figure, among the above technical solutions, the temperature sampling connector 2 includes a first temperature sensor, a second temperature sensor, and a third temperature sensor. The first temperature sensor, the second temperature sensor, and the third temperature sensor are specifically resistors with a resistance value of 10,000 ohms. The first temperature sensor, the second temperature sensor, and the third temperature sensor are the T1 temperature sensor, the T2 temperature sensor, and the T3 temperature sensor respectively.

[0037] Furthermore, in the above technical solution, the internal acquisition harness 9 includes fourteen battery positive electrode acquisition points and four battery negative electrode acquisition points. The battery positive electrode acquisition points are used to collect the positive electrode voltages of fourteen batteries. The positive electrode voltage labels of the fourteen batteries are B1, B2, B3,..., B13, B14 respectively.

[0038] Furthermore, in the above technical solution, the battery negative electrode acquisition points include a first acquisition point 91, a second acquisition point 92, a third acquisition point 93, and a fourth acquisition point 94. The first acquisition point 91 corresponds to the negative electrode voltage of the first battery; the second acquisition point 92 corresponds to the negative electrode voltage of the eleventh battery; the third acquisition point 93 corresponds to the negative electrode voltage of the eighth battery; the fourth acquisition point 94 corresponds to the negative electrode voltage of the fourth battery.

[0039] Furthermore, in the above technical solution, the first temperature sensor is located at the first acquisition point 91, the second temperature sensor is located at the fourth acquisition point 94, and the third temperature sensor corresponds to the positive electrode acquisition point of the fourteenth battery.

[0040] Further, in the above technical solution, the external connection harness 8 adopts a pin misalignment design. Specifically, the first acquisition point 91 and the second acquisition point 92 correspondingly acquire the battery negative electrodes of the first battery module 4, the first acquisition point 91 and the third acquisition point 93 correspondingly acquire the battery negative electrodes of the second battery module 5, and the first acquisition point 91 and the fourth acquisition point 94 correspondingly acquire the battery negative electrodes of the third battery module 6.

[0041] As Figure 3 shown, further, in the above technical solution, the pin misalignment of the first battery module 4 corresponding to the connector is specifically that the last two vacant pins of the first battery module 4 are not connected.

[0042] Further, in the above technical solution, the pin misalignment of the second battery module 5 corresponding to the connector is specifically that the third from the bottom and the last pins of the second battery module 5 are vacant and not connected.

[0043] Further, in the above technical solution, the pin misalignment of the third battery module 6 corresponding to the connector is specifically that the third from the bottom and the second from the bottom pins of the third battery module 6 are vacant and not connected.

[0044] Further, in the above technical solution, the plug-in connector adopts a snap spring type terminal design.

[0045] High-mating-force pluggable connectors: 2EDGKN series, 15EDGKN series, etc., PUSH-IN connection technology, quick wiring, universal mounting method, suitable for various occasions.

[0046] Specifically, the principle of the present utility model is as follows: Unified harness design: A unified harness design is adopted inside the module box, combining the acquisition points of different battery modules on the same harness, ensuring the compatibility and interchangeability between modules, simplifying the harness layout, and reducing the manufacturing cost;

[0047] Pin misalignment design: The external harness adopts a pin misalignment design, and different module boxes can be easily identified through the misalignment positions, effectively avoiding the situation of incorrect plugging of the connectors, and improving the accuracy and reliability of the connection;

[0048] Tool-free quick pluggable connector: The connector adopts a tool-free, quick pluggable, snap spring type terminal design, which not only improves the seismic resistance but also simplifies the installation and maintenance process. Plugging and unplugging can be completed without professional tools, greatly improving the work efficiency;

[0049] External BMU board: Placing the BMU board outside the module box not only facilitates debugging and maintenance but also avoids occupying the internal space of the module, further reducing the weight of the module.

Claims

1. A module box electrical connection structure, comprising a plurality of batteries, characterized in that: The invention comprises a plug-in connector, a battery module, a BMU acquisition board (7), an external connection harness (8), and an internal acquisition harness (9), wherein the plug-in connector comprises a voltage sampling connector (1), a temperature sampling connector (2), and a BMU sampling interface connector (3), wherein the battery module comprises a first battery module (4), a second battery module (5), and a third battery module (6), wherein the first battery module (4), the second battery module (5), and the third battery module (6) are connected in series, wherein the voltage sampling connector (1) is connected to a voltage acquisition point of the battery module, and the BMU sampling interface connector (3) is connected to the temperature sampling point of the battery module. The first battery module (4), the second battery module (5), and the third battery module (6) are connected to a BMU acquisition board (7), the internal acquisition harness (9) is used to collect voltage and temperature signals in the battery module and transmit them to the BMU acquisition board (7), the BMU acquisition board (7) is located outside the module box, the internal acquisition harness (9) of the first battery module (4), the second battery module (5), and the third battery module (6) are connected to the external connection harness (8) through the voltage sampling connector (1) and the temperature sampling connector (2), and the external connection harness (8) is connected to the BMU sampling interface connector (3) of the BMU acquisition board (7); Wherein, the connector of the external connection harness (8) adopts a pin staggered design.

2. The module box electrical connection structure according to claim 1, characterized in that: The temperature sampling connector (2) comprises a first temperature sensor, a second temperature sensor and a third temperature sensor, wherein the first temperature sensor, the second temperature sensor and the third temperature sensor are specifically resistors with a resistance value of 10,000 ohms.

3. The module box electrical connection structure according to claim 2, characterized in that: The internal collection harness (9) comprises fourteen battery positive electrode collection points and four battery negative electrode collection points, and the battery positive electrode collection points are used to collect positive electrode voltages of the fourteen batteries.

4. The module box electrical connection structure according to claim 3, characterized in that: The battery negative electrode collection points include a first collection point (91), a second collection point (92), a third collection point (93) and a fourth collection point (94), wherein the first collection point (91) corresponds to the negative electrode voltage of the first battery; the second collection point (92) corresponds to the negative electrode voltage of the eleventh battery; the third collection point (93) corresponds to the negative electrode voltage of the eighth battery; and the fourth collection point (94) corresponds to the negative electrode voltage of the fourth battery.

5. The module box electrical connection structure according to claim 4, characterized in that: The first temperature sensor is located at the first collection point (91), the second temperature sensor is located at the fourth collection point (94), and the third temperature sensor corresponds to the positive electrode collection point of the fourteenth battery.

6. The module box electrical connection structure according to claim 5, characterized in that: The external connection harness (8) adopts a pin staggered design, specifically, the first collection point (91) and the second collection point (92) are corresponding to the collection of the battery negative pole of the first battery module (4), the first collection point (91) and the third collection point (93) are corresponding to the collection of the battery negative pole of the second battery module (5), and the first collection point (91) and the fourth collection point (94) are corresponding to the collection of the battery negative pole of the third battery module (6).

7. The module box electrical connection structure according to claim 6, characterized in that: The pin misalignment of the first battery module (4) specifically means that the last two pins of the first battery module (4) are left vacant and not connected.

8. The module box electrical connection structure according to claim 7, characterized in that: The pin misalignment of the second battery module (5) specifically means that the third to last and the last pin of the second battery module (5) are left vacant and unconnected.

9. The module box electrical connection structure according to claim 8, characterized in that: The pin misalignment of the third battery module (6) specifically means that the third to last and the second to last pins of the third battery module (6) are left vacant and unconnected.

10. The module box electrical connection structure according to claim 9, characterized in that: The plug-in connector adopts a spring-type terminal design.

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