一种兼容DCDC输入的低压电池模组

Abstract

本实用新型属于电动汽车供能领域，公开了一种兼容DCDC输入的低压电池模组，降低了对应的硬件成本，显著提升了电动汽车的价格优势，包括供电回路，供电回路包括输出正极端子、输出负极端子、模组接入开关、DCDC接入端子以及DCDC接入开关，并且DCDC接入端子与DCDC模块输出端电连接，模组接入开关和低压电芯包依次串接在输出正极端子、输出负极端子之间，从而输出正极端子、输出负极端子、模组接入开关以及低压电芯包形成电芯供电子回路；DCDC接入开关串接在DCDC接入端子、输出正极端子之间，从而DCDC接入端子、DCDC接入开关以及输出正极端子构成DCDC供电子回路。

Claims

1. A low-voltage battery module compatible with a DCDC input, used to power a low-voltage system of an electric vehicle, and electrically connected to an output end of a DCDC module in the vehicle, comprising a low-voltage cell pack, characterized in that, Also includes: The power supply circuit includes a positive output terminal, a negative output terminal, a module access switch, a DC-DC access terminal, and a DC-DC access switch, wherein the DC-DC access terminal is electrically connected to the output terminal of the DC-DC module. The module access switch and the low-voltage battery pack are connected in series between the positive output terminal and the negative output terminal, thereby forming a battery cell power supply circuit. The DC-DC access switch is connected in series between the DC-DC access terminal and the positive output terminal, thereby forming a DC-DC power supply circuit.

2. The low voltage battery module with compatible DCDC input of claim 1, wherein, Also includes: The heat dissipation cover has heat dissipation fins on its outer surface and heat dissipation protrusions on its inner surface. These protrusions are coated with a thermally conductive adhesive layer, and the heat dissipation protrusions dissipate heat from the module connection switch and the DC-DC connection switch through the thermally conductive adhesive layer. Both the module access switch and the DC-DC access switch include multiple MOSFETs connected in parallel.

3. The low voltage battery module with compatible DCDC input of claim 2, wherein, Also includes: Control circuit board and module housing, Both the module access switch and the DC-DC access switch are mounted on the control circuit board. The module housing has a lower receiving cavity, an upper receiving cavity, and a coupling protrusion. The low-voltage battery pack is disposed in the lower receiving cavity through a potting compound layer. The control circuit board is disposed in the upper receiving cavity, and the heat dissipation cover is disposed in the upper receiving cavity. The coupling protrusion has the output positive terminal, the output negative terminal, and the DC-DC input terminal, which is electrically connected to the DC-DC input switch.

4. The low voltage battery module with compatible DCDC input of claim 3, wherein, Also includes: Cell end caps, positive electrode busbars, and negative electrode busbars. The battery cell end cap is formed by injection molding and has a first through hole and a second through hole. Both the positive and negative electrode current-carrying busbars have a continuous, integrated current-collecting section, a current-guiding section, and an output section. The current-collecting section and the output section both protrude from the surface of the cell end cap. The current-guiding section is embedded inside the cell end cap, and the two current-collecting sections are respectively adjacent to the first via and the second via. The low-voltage battery cell comprises multiple pouch cells connected in series, and the low-voltage battery cell package has a positive output tab and a negative output tab. The positive output tab passes through the first through hole and is bent and welded to the adjacent current collector; the negative output tab passes through the second through hole and is bent and welded to the adjacent current collector.

5. The low-voltage battery module compatible with DC-DC input according to claim 4, characterized in that: in, The end cap of the battery cell also has a vent hole, and the lower receiving cavity also has a gas discharge hole that is connected to the vent hole, and the gas discharge hole is open to the outside.

6. The low-voltage battery module compatible with DC-DC input according to claim 4, characterized in that: wherein The module housing also has a connecting sub-cavity that connects the lower receiving cavity and the upper receiving cavity. The connecting sub-cavity is provided with a positive electrode adapter and a negative electrode adapter. The current collector, which is welded to the positive electrode output tab, is electrically connected to the module access switch and the DC-DC access switch through the positive electrode adapter plate.

7. The low voltage battery module with compatible DCDC input of claim 4, wherein, Also includes: A voltage acquisition board is disposed on the end cover of the battery cell. The voltage acquisition board has multiple pairs of voltage acquisition nickel plates and a communication module. The multiple pairs of voltage acquisition nickel plates are used to acquire the voltage of multiple cells in the low-voltage battery cell pack in real time. The communication module is used to transmit the voltage value corresponding to the acquired output voltage to the control circuit board in the form of a signal.

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