Low-speed vehicle battery pack

Abstract

The utility model discloses a low-speed vehicle battery pack which comprises a box cover and a box body matched with the box cover, one side of the top end of the box cover is provided with an open groove, a wire outlet is formed in the open groove, and the open groove is provided with a pole cover plate used for protecting the wire outlet; a heating film is arranged at the bottom end in the box body, a battery cell is arranged at the top end of the heating film, an upper bracket is mounted at the top end of the battery cell, and a palladium sheet is arranged on the surface of the upper bracket; a protection plate is arranged in the box body; a vertically upward protrusion is arranged on a frame at the top end of the box body and connected with a frame at the bottom end of the box cover in an inserted mode. The beneficial effects of the utility model are that the pole cover plate uses the flip design, which not only reserves a wire outlet, but also ensures that the outer surfaces of the positive and negative poles are insulated and the assembly is simple and convenient; the lower bracket is combined with the box body, so that materials are saved, and the process is simplified; the protection plate is fixed, and a traditional adhesive tape winding or screw fastening mode is abandoned; fixing is carried out in a mode that the inserting grooves of the box body and the inner protruding plates of the box cover are tightly pressed, and materials are saved.

Description

Technical Field

[0001] The utility model relates to the technical field of batteries, in particular to a battery pack for a low-speed vehicle. Background Art

[0002] The broad definition of low-speed electric vehicles can cover electric bicycles, electric motorcycles, electric tricycles, low-speed electric vehicles, etc.

[0003] Low-speed electric vehicles are simple four-wheeled pure electric vehicles with a speed of less than 70 km / h. The maximum speed is generally 70 km / h, and the appearance, structure and performance are similar to those of fuel vehicles.

[0004] The battery packs used in low-speed vehicles in the existing technology still have the following problems: most of them use metal casings, which are relatively expensive; because it is a metal casing, more insulating material is used between the battery pack and the box, which is relatively expensive; the materials are complicated, the manufacturing process is complex, and the material and labor assembly costs are relatively high; most low-speed vehicle battery packs are not waterproof and airtight.

[0005] To this end, a low-speed vehicle battery pack is proposed. Summary of the Invention

[0006] The purpose of the present utility model is to provide a low-speed vehicle battery pack to solve the problems raised in the above background technology.

[0007] To achieve the above objectives, the present invention provides the following technical solutions:

[0008] A low-speed vehicle battery pack includes a box cover and a box body matched therewith, wherein a slot is provided on one side of the top of the box cover, and a wire outlet is provided inside the slot, and a pole cover plate for protecting the wire outlet is provided in the slot;

[0009] A heating film is provided at the bottom of the box body, a battery core is provided at the top of the heating film, an upper bracket is installed at the top of the battery core, and a palladium sheet is provided on the surface of the upper bracket;

[0010] A protective plate is provided inside the box;

[0011] The frame at the top end of the box body is provided with a vertically upward protrusion, and the protrusion is plugged into the frame at the bottom end of the box cover.

[0012] Furthermore, a bracket fixing column for installing the upper bracket is provided inside the box body, which can fix the upper bracket and make the internal structure stable.

[0013] Furthermore, the slot is connected to the pole cover plate via a pin, which makes it convenient to use the pole cover plate and to cover the wire outlet.

[0014] Furthermore, one end of the pole cover protrudes downward and is provided with a hook, which facilitates fixing the pole cover by snapping, and covers the outlet to maintain stability when not in use.

[0015] Furthermore, a groove cooperating with the hook is provided on one side of the wire outlet.

[0016] Furthermore, a lower bracket for installing the heating film is provided at the bottom of the interior of the box body and is integrated with the box body, so as to facilitate the installation of the heating film.

[0017] Furthermore, a protection plate slot for inserting a protection plate is provided at the bottom end of the interior of the box body, so as to prevent the protection plate from being moved and stabilize it.

[0018] Furthermore, the upper bracket is provided with a main positive and heating harness port.

[0019] Furthermore, the box cover is fitted with a sealing groove for plugging into the protrusion, and a silicone foam round strip is provided inside the sealing groove for further sealing, which can effectively perform sealing.

[0020] Furthermore, a communication port and a handle are provided at the top of the box cover, and the box cover is provided with handle sockets that cooperate with both ends of the handle for easy taking, and an inner convex plate for pressing the protective plate is provided at the bottom of the box cover.

[0021] Compared with the prior art, the beneficial effects of the present invention are:

[0022] The pole cover adopts a flip-up design, which not only reserves the outlet, but also ensures the insulation of the outer surface of the positive and negative poles and is simple and convenient to assemble;

[0023] The lower bracket is combined with the box body, saving materials and simplifying the process;

[0024] The fixing of the protective plate abandons the traditional tape wrapping or screw fastening method;

[0025] The box body is fixed by pressing the slots on the box body and the convex plates inside the box cover, which saves materials, simplifies the process and makes the installation and replacement of the protection plate more convenient. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 This is an explosion diagram of the utility model;

[0027] Figure 2 This is a partially enlarged structural diagram of the pole cover of the present utility model;

[0028] Figure 3 This is a schematic diagram of the internal structure of the box of the present utility model;

[0029] Figure 4 This is a schematic diagram of a partially enlarged structure of a protrusion of the present invention;

[0030] Figure 5 This is a schematic diagram of the inner convex plate of the present invention. DETAILED DESCRIPTION

[0031] The technical solutions in the embodiments of the present invention will be described clearly and completely below with reference to the accompanying drawings in the embodiments of the present invention.

[0032] Example 1:

[0033] See also Figure 1-5 , the utility model provides a technical solution:

[0034] A low-speed vehicle battery pack includes a box cover 1 and a box body 9 matched therewith. A slot is provided on one side of the top of the box cover 1. A wire outlet 3 is provided inside the slot to facilitate wire outlet. In order to cover the wire outlet 3, a pole cover 4 is provided on the slot to ensure insulation of the outer surfaces of the positive and negative poles and to facilitate assembly.

[0035] A heating film 10 is provided at the bottom end of the box body 9. In a low temperature environment, the electrolyte inside the lithium battery will become viscous and the ion conductivity will deteriorate, resulting in a decrease in the charge and discharge performance of the battery. The heating film 10 generates heat to increase the temperature of the battery and restore the electrolyte to normal fluidity, thereby improving the charge and discharge performance of the battery. Long-term use of lithium batteries in a low temperature environment will accelerate the aging process of the battery and shorten the service life of the battery. The use of the heating film 10 can ensure that the battery operates within a suitable temperature range and avoids being in a low temperature state for a long time, thereby extending the service life of the battery. At extremely low temperatures, lithium batteries may have safety hazards such as uneven charging and internal short circuits. The heating film 10 increases the temperature of the battery, which can prevent these safety hazards from occurring and ensure the safe operation of the car. Since the battery performance decreases in winter, the car may take longer to start or charge. The use of the heating film 10 can speed up the charging and discharging speed of the battery, reduce the user's waiting time, and at the same time ensure the normal operation of the car's internal electrical equipment, such as air conditioning, audio, etc., providing the driver with a more comfortable driving experience. The heating film 10 mainly uses the principle of resistive heating to convert electrical energy into thermal energy. It is generally made of conductive materials (such as conductive aluminum foil, conductive graphite, etc.). The internal resistance of the conductive material generates heat and transfers the heat to the lithium battery to increase the temperature of the lithium battery.

[0036] A battery cell 7 is provided on the top of the heating film 10, and an upper bracket 5 is installed on the top of the battery cell 7. A palladium sheet 6 is provided on the surface of the upper bracket 5. The palladium sheet 6 serves as a connector for the battery cells, and can connect the battery cells into a battery pack connected in series or in parallel. By providing a current path, the battery cells can work together and transmit electrical energy to the entire battery pack. The design and manufacture of the palladium sheet 6 need to consider factors such as current carrying capacity, heat dissipation performance and structural strength to ensure reliability and stability under high current and high temperature conditions;

[0037] The upper bracket 5 is provided with a main positive 13 and a heating harness port 14 to facilitate the fair use of the battery;

[0038] A protection board 8 is installed inside the box 9 to protect the battery. Since the material of the lithium battery itself determines that it cannot be overcharged, over-discharged, overcurrent, short-circuited and ultra-high temperature charged and discharged, the lithium battery assembly is equipped with a protection board with a sampling resistor and a current fuse.

[0039] Lithium batteries operating in overheated or overcooled environments may experience performance degradation and shorten their lifespan. The protection board's built-in temperature sensor monitors the battery's temperature in real time. Once the temperature exceeds a preset safety range, the board will take measures to protect the battery, such as limiting the charge and discharge rate, activating the cooling system, or disconnecting the battery output.

[0040] Short circuit is a very serious safety problem in lithium batteries. It may cause the battery to discharge a large current instantly, generate a lot of heat, and cause thermal runaway. The protection board 8 can detect the current of the battery. Once an abnormally large current is detected, it will immediately cut off the battery circuit to prevent damage caused by short circuit.

[0041] Overcurrent protection means that during battery operation, if the current exceeds the designed carrying capacity of the battery, the protection board 8 will take measures to limit the current to prevent the battery from overheating and damage;

[0042] A lithium battery pack is composed of multiple single cells. Due to slight differences in the manufacturing process, the batteries may be inconsistent during use, that is, the voltage or capacity of some cells are different from others. The protection board 8 uses the balancing management function to ensure that each cell in the battery pack is charged and discharged at the same rate, thereby improving the performance and life of the entire battery pack.

[0043] The protection board 8 not only protects the battery, but also monitors the battery status in real time, such as voltage, current, temperature, etc., and transmits this data to external devices such as battery management systems and vehicle systems through network communication. Users and maintenance personnel can understand the battery status in real time and perform maintenance and management in a timely manner;

[0044] When the battery is abnormal, the protection board 8 can record the fault code and related data to help diagnose the battery problem;

[0045] In some cases, after the battery has not been used for a long time, the voltage may drop to a state where it cannot start charging and discharging normally. The pre-charging function of the protection board 8 can charge the battery with a small current when the battery voltage is too low, so that the battery voltage returns to the normal operating range, and then the normal charging and discharging process can be carried out;

[0046] Different application scenarios have different requirements for batteries. The protection board 8 can set different protection strategies through software to meet the needs of specific applications. For example, some applications may require higher charge and discharge current limits, while other applications may require stricter temperature control;

[0047] A vertically upward protrusion 12 is provided on the frame at the top end of the box body 9 , and the protrusion 12 is plugged into the frame at the bottom end of the box cover 1 , so that the box body 9 and the box cover 1 fit more closely.

[0048] like Figure 1 As shown:

[0049] In order to facilitate the fixing of the upper bracket 5 , a bracket fixing column 11 for mounting the upper bracket 5 is provided inside the box body 9 to maintain the stability of the internal structure.

[0050] like Figure 2 As shown:

[0051] In order to realize the flipping of the pole cover 4, the slot is connected to the pole cover 4 through a pin. In order to facilitate the fixing of the pole cover 4 on the outlet 3, a hook is provided on one end of the pole cover 4 and protrudes downward. In order to cooperate with the outlet 3 for fixation, a groove 301 cooperating with the hook is provided on one side.

[0052] like Figure 3 As shown:

[0053] In order to install the heating film 10 and facilitate the insulation of the battery assembly, a lower bracket 901 for installing the heating film 10 is opened at the bottom end of the box body 9 and integrated with the box body.

[0054] like Figure 3 As shown:

[0055] In order to install the protection plate 8 , a protection plate notch 15 for inserting the protection plate 8 is provided at the bottom end of the interior of the box body 9 , so that the protection plate 8 is stabilized inside the box body 9 .

[0056] Example 2:

[0057] The difference from Example 1 is that Figure 4-5 As shown, in order to improve the sealing performance between the box body 9 and the box cover 1, a sealing groove is provided on the box cover 1 to be plugged into the protrusion 12. At the same time, a silicone foam round strip is provided inside the sealing groove for further sealing to avoid contact with the outside world and isolate the environment to the greatest extent.

[0058] A communication port 2 and a handle 101 are provided at the top of the box cover 1. In order to install the handle 101, handle sockets that match the two ends of the handle 101 are provided on the box cover 1 to facilitate taking out the battery pack.

[0059] In order to keep the protection plate 8 more stable, an inner convex plate 102 for pressing the protection plate 8 is provided at the bottom end of the box cover 1 .

[0060] Although the embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations may be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A low-speed vehicle battery pack, comprising a box cover (1) and a box body (9) matched therewith, characterized in that: A slot is provided on one side of the top of the box cover (1), and a wire outlet (3) is provided inside the slot, and a pole cover plate (4) for protecting the wire outlet (3) is provided in the slot; A heating film (10) is provided at the bottom of the box (9), a battery core (7) is provided at the top of the heating film (10), an upper bracket (5) is installed at the top of the battery core (7), and a palladium sheet (6) is provided on the surface of the upper bracket (5); A protective plate (8) is provided inside the box (9); The frame at the top end of the box body (9) is provided with a vertically upward protrusion (12), and the protrusion (12) is plugged into the frame at the bottom end of the box cover (1).

2. The low-speed vehicle battery pack according to claim 1, characterized in that: A bracket fixing column (11) for mounting the upper bracket (5) is provided inside the box (9).

3. The low-speed vehicle battery pack according to claim 1, characterized in that: The slot is connected to the pole cover plate (4) via a pin.

4. The low-speed vehicle battery pack according to claim 3, characterized in that: One end of the pole cover plate (4) protrudes downward and is provided with a hook.

5. The low-speed vehicle battery pack according to claim 4, characterized in that: A groove (301) that cooperates with the hook is provided on one side of the wire outlet (3).

6. The low-speed vehicle battery pack according to claim 1, characterized in that: The bottom end of the box body (9) is provided with a lower bracket (901) for mounting the heating film (10) and integrated with the box body.

7. The low-speed vehicle battery pack according to claim 1, characterized in that: The bottom end of the box body (9) is provided with a protection plate notch (15) for inserting the protection plate (8).

8. The low-speed vehicle battery pack according to claim 1, characterized in that: The upper bracket (5) is provided with a main positive (13) and a heating harness port (14).

9. The low-speed vehicle battery pack according to claim 1, characterized in that: The box cover (1) and the protrusion (12) are matched and plugged into a sealing groove, and a silicone foam round strip is provided inside the sealing groove for further sealing.

10. The low-speed vehicle battery pack according to claim 1, characterized in that: The top of the box cover (1) is provided with a communication port (2) and a handle (101), the box cover (1) is provided with handle sockets that cooperate with both ends of the handle (101), and the bottom of the box cover (1) is provided with an inner convex plate (102) for pressing the protective plate (8).

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