Apparatus used for heating battery system and new energy automobile equipped with apparatus

Abstract

The invention discloses an apparatus used for heating a battery system and a new energy automobile equipped with the apparatus. The apparatus used for heating the battery system comprises a power supply, a first heating assembly, a heating contactor, and a controller, wherein one end of the first heating assembly is connected with the power supply while the other end of the first heating assembly is connected with the heating contactor in series; the first heating assembly comprises shunt-wound first heating piece and multiple first auxiliary heating pieces which are adhered to different positions of the battery system respectively, wherein the first heating piece comprises a first resistor; each of the multiple first auxiliary heating pieces comprises a temperature control switch and a first auxiliary resistor connected with the temperature control switch in series; and the controller is used for controlling the heating contactor to be closed when the battery system is started under a low-temperature state. The apparatus used for heating the battery system provided by the embodiment of the invention is high in heating efficiency, uniform in heating, simple in structure, easy to implement, and high in space utilization ratio.

Description

technical field [0001] The invention relates to the technical field of new energy vehicles, in particular to a device for heating a battery system and a new energy vehicle with the device. Background technique [0002] As the core power supply component of new energy vehicles, the performance of batteries is directly related to the working stability of the entire system. In particular, under low temperature conditions, the temperature characteristics of the battery are critical. The temperature characteristics of ordinary batteries are not ideal, and low temperature will lead to a significant deterioration of battery performance. Currently, there are several ways of heating devices used in battery systems. [0003] The invention with application number 201110420521.9 introduces "a battery system with heating function". This solution has the following disadvantages: 1) Since the system uses a fan to bring heat to the battery, the heating effect of the battery far away from ...

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Problems solved by technology

[0003] The invention with application number 201110420521.9 introduces "a battery system with heating function". This solution has the following disadvantages: 1) Since the system uses a fan to bring heat to the battery, the heating effect of the battery far away from the air duct is poor, and the heating Uneven; 2) The system is composed of units such as heat pipes and fans, which takes up a lot of space, and the space utilization rate is low; 3) The system includes adiabatic shells, heat pipes, fans, burners and other components, and the structure is complex; 4) Due to the existence of Open flames, and the battery itself must consider safety, this system has a great potential safety hazard in the test required by the national standard

[0004] The invention with the application number of 201420590617.9 introduces "a battery module with heating function", which mainly introduces a heating method of the module, but it has the following defects: 1) Due to the position and heat dissipation of each battery cell They are all different, so even if the heating sheet is the same, the temperature difference of each part of the battery is also very large; 2) This heating device needs a limit slot to fix the position of the battery, and the position of the heating film is fixed by fixing the clip angle and the battery. The heating film and the battery are inseparable. In close contact, so heating is inefficient

[0005] The invention with application number 201380025085.2 introduces a "battery heating device", which mainly controls the temperature rise by reducing the current. This solution also has the following disadvantages: 1) Although the device changes the heating efficiency by reducing the current, its It is still an overall control, and the local heating power of the battery cannot be controlled, so the heating is uneven; 2) The device can alleviate the excessive local temperature difference by reducing the current, but the cost is that the heating time is relatively prolonged, so the heating efficiency is low

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