Low-temperature-resistant battery box and low-temperature-resistant power supply

Abstract

The utility model discloses a low temperature resistant battery box and a low temperature resistant power supply, the low temperature resistant battery box comprises a U-shaped battery box body, the bottom of the U-shaped battery box body is symmetrically provided with two sealing plates, and an aluminum alloy liner is fixed between the two sealing plates; the grating heat conduction structures are installed on the outer walls of the two sides of the aluminum alloy inner container; the upper battery cover is mounted at the top end of the U-shaped battery box body in a bolting manner; and the oil storage cavities are arranged on the two sides of the interior of the U-shaped battery box body. According to the utility model, each battery monomer can be fully heated, compared with a hot air heating structure, the battery monomers cannot hinder hot air, the electric heating unit and heat conduction oil combined heat supply structure has higher response speed, and once the temperature of the external environment is reduced, the battery monomers can be heated by the electric heating unit and the heat conduction oil. And the electric heating rod can rapidly heat the heat conduction oil under the control of a worker, so that the temperature of the battery box is rapidly increased, and the performance of the battery can be rapidly recovered in a low-temperature environment.

Description

Technical Field

[0001] The utility model relates to the technical field of battery energy storage, in particular to a low-temperature resistant battery box and a low-temperature resistant power supply. Background Art

[0002] A low-temperature resistant battery box and power supply is a device used to protect battery cells from operating normally in an extremely low-temperature environment. It prevents the battery from prematurely failing or being damaged under low-temperature conditions by providing insulation and heat preservation. This device is suitable for multiple fields, such as energy storage batteries, new energy vehicle batteries, etc. Its working principle is to use insulating materials and heat preservation materials to form heat insulation layers and thermal insulation layers to ensure that the battery can maintain a stable operating temperature in a low-temperature environment, extend the battery life and ensure its normal operation. For example, a low-temperature resistant energy storage battery disclosed in the authorization announcement number CN216563347U includes a battery box, a positive and negative motor is welded and fixed to the side of the battery box, a battery cell is welded and fixed to the bottom surface of the battery box, a box groove is opened on the inner side wall of the battery box, a pneumatic rod is welded and fixed to the inner wall of the box groove, and a first sealing slide plate and a second sealing slide plate are welded and fixed to the end faces of the pneumatic rods on both sides, respectively. The first sealing slide plate is welded and fixed to the end faces of the pneumatic rods on both sides. The skateboard and the second sealing skateboard are both provided with a skateboard slope at one end away from the pneumatic rod, and a skateboard joint is provided on the surface of the skateboard slope. The output end of the forward and reverse motors is provided with a low-temperature protection device, etc., which fixes the battery cells inside the battery box and automatically protects the battery cells when they are at low temperatures through the low-temperature protection device. However, this technical solution mainly uses an electric heater fan for heating. Due to the mutual blocking between the battery cells, the heating of the electric heater fan may not be evenly distributed to each battery cell, which will cause some battery cells to have higher temperatures and other battery cells to have lower temperatures, thereby reducing the performance and life of the entire battery system. In addition, due to the heating method of the electric heater fan, part of the heat will be dissipated to the outside of the box, especially in the gaps between the battery cells, and its thermal protection performance is limited under low temperature conditions. Utility Model Content

[0003] The purpose of the utility model is to provide a low-temperature resistant battery box and a low-temperature resistant power supply to solve the problems raised in the above background technology.

[0004] To achieve the above purpose, the utility model is implemented as follows:

[0005] In a first aspect, the present application discloses a low temperature resistant battery box, comprising:

[0006] A U-shaped battery box body, wherein two sealing plates are symmetrically mounted at the bottom of the U-shaped battery box body, and an aluminum alloy inner liner is fixed between the two sealing plates;

[0007] A grille heat-conducting structure, wherein the grille heat-conducting structure is installed on the outer walls of both sides of the aluminum alloy inner liner;

[0008] An upper battery cover, the upper battery cover being bolted and mounted on the top of the U-shaped battery box body;

[0009] The oil storage cavity is arranged on both sides of the U-shaped battery box body, an inverted U-shaped partition frame is installed inside the U-shaped battery box body on one side of the oil storage cavity, and an electric heating unit is installed inside the inverted U-shaped partition frame.

[0010] Preferably, upper positioning holes for bolting the upper battery cover are provided at the corner positions of the top of the U-shaped battery box body.

[0011] Preferably, lower protrusions are fixed on both sides of the bottom end of the upper battery cover, and the top of the U-shaped battery box body is provided with a sinking portion that matches the lower protrusions.

[0012] Preferably, the grille heat-conducting structure includes a plurality of transverse heat sinks and a plurality of vertical heat sinks fixed on the outer walls on both sides of the aluminum alloy inner tank, and the plurality of transverse heat sinks and vertical heat sinks are staggered at 90 degrees.

[0013] Preferably, the electric heating unit adopts an electric heating rod.

[0014] Preferably, thermal insulation cotton is bonded to the top of the upper battery cover.

[0015] In a second aspect, the present application also discloses a low-temperature resistant power supply, comprising a plurality of equally spaced lithium battery cells installed inside the aluminum alloy inner shell.

[0016] Compared with the prior art, the beneficial effects of the utility model are as follows: the low-temperature resistant battery box and the low-temperature resistant power supply are provided with an oil storage chamber and an aluminum alloy inner liner and other structures that cooperate with each other. Multiple lithium battery cells to be used are placed in the aluminum alloy inner liner, and heat transfer oil is injected into the two oil storage chambers of the U-shaped battery box body. After the oil is injected, the staff uses a bolted method to seal and install the battery cover on the top of the U-shaped battery box body. At this time, the power supply becomes sealed, and the electric heating unit is turned on to work. The electric heating unit generates heat by heating with electric current, and combined with the conductivity of the heat transfer oil, the heat can be evenly transferred to the aluminum alloy inner liner and the lithium battery cells, ensuring that each battery cell can get sufficient heat supply. Compared with the hot air heating structure, each battery cell will not hinder the hot air. The heating structure of the electric heating unit and the heat transfer oil combination has a faster response speed. Once the external ambient temperature drops, the heating rod can quickly heat the heat transfer oil under the control of the staff, thereby quickly increasing the temperature of the battery box, which helps to quickly restore the performance of the battery in a low temperature environment. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a schematic diagram of the main structure of the utility model;

[0018] Figure 2 This is a schematic diagram of the main structure of the utility model after the upper battery cover is separated;

[0019] Figure 3 This is a schematic diagram of the three-dimensional structure of the U-shaped battery box of the utility model;

[0020] Figure 4 This is a schematic diagram of the three-dimensional structure of the U-shaped battery box of the utility model;

[0021] Figure 5 This is a schematic diagram of the three-dimensional structure of the U-shaped battery box of the utility model;

[0022] In the figure: 1. U-shaped battery box; 101. horizontal heat sink; 102. vertical heat sink; 2. upper battery cover; 201. lower protrusion; 3. sealing plate; 4. upper positioning hole; 5. aluminum alloy liner; 6. lithium battery cell; 7. inverted U-shaped partition frame; 8. oil storage cavity; 9. electric heating unit. DETAILED DESCRIPTION

[0023] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0024] See also Figure 1-5 The utility model provides an embodiment: a low temperature resistant battery box and a low temperature resistant power supply, comprising a U-shaped battery box body 1, two sealing plates 3 are symmetrically installed at the bottom of the U-shaped battery box body 1, an aluminum alloy liner 5 is fixed between the two sealing plates 3, and a plurality of equally spaced lithium battery cells 6 are installed inside the aluminum alloy liner 5;

[0025] The staff places multiple lithium battery cells 6 to be used in the aluminum alloy inner liner 5. The multiple lithium battery cells 6 in the same U-shaped battery box 1 are connected in parallel or in series. Parallel connection is to connect the positive and negative electrodes of multiple lithium battery cells 6 together to increase the total capacity and current capacity of the power supply. The positive electrodes of the battery cells are marked with "+" and connected together. This can be achieved by using wires and appropriate connectors or battery clamps to ensure that the connection is firm and not loose. The negative electrodes of the battery cells are marked with "-" and connected together. Wires and connectors or battery clamps are also used to ensure that the connection is reliable and not loose.

[0026] A grille heat-conducting structure, which is installed on the outer walls of both sides of the aluminum alloy inner liner 5;

[0027] An upper battery cover 2, which is bolted and mounted on the top of the U-shaped battery box body 1;

[0028] The oil storage chamber 8 is arranged on both sides of the U-shaped battery box body 1. Heat transfer oil is injected into the two oil storage chambers 8 of the U-shaped battery box body 1. An inverted U-shaped partition frame 7 is installed inside the U-shaped battery box body 1 on one side of the oil storage chamber 8. An electric heating unit 9 is installed inside the inverted U-shaped partition frame 7. The battery cover 2 is sealed and installed on the top of the U-shaped battery box body 1 by bolting. At this time, the power supply is in a sealed state;

[0029] The staff energizes the electric heating unit 9. When the power temperature is too low, the staff turns on the electric heating unit 9. The electric heating unit 9 generates heat through electric current heating. Combined with the conductivity of the heat transfer oil, the heat can be evenly transferred to the aluminum alloy liner 5 and the lithium battery cell 6, thereby ensuring that each battery cell can be fully heated.

[0030] Lower protrusions 201 are fixed on both sides of the bottom of the upper battery cover 2, and a sinking part that matches the lower protrusion 201 is provided at the top of the U-shaped battery box body 1. Upper positioning holes 4 for bolting the upper battery cover 2 are provided at the corner positions of the top of the U-shaped battery box body 1. The fit between the upper battery cover 2 and the U-shaped battery box body 1 is ensured by the lower protrusion 201 and the sinking part.

[0031] When the lithium battery cells 6 are stored in the aluminum alloy liner 5 in a certain number of groups, the aluminum alloy liner 5 serves as the first sealing structure, and the sealing plate 3 serves as the second sealing structure, thereby ensuring that the heat is in the U-shaped battery box 1 and reducing the heat loss in a low temperature environment;

[0032] The top of the upper battery cover 2 is bonded with thermal insulation cotton, and the electric heating unit 9 adopts an electric heating rod, which can be directly placed in the heat-conducting oil. By combining the electric heating rod with the heat-conducting oil, the heat loss and dissipation can be reduced, the heating effect in a low-temperature environment can be ensured, the performance and reliability of the battery box in an extremely cold environment can be improved, and the battery monomer can be ensured to work normally and its life can be extended;

[0033] The grille heat conduction structure includes a plurality of horizontal heat sinks 101 and a plurality of vertical heat sinks 102 fixed on the outer walls of both sides of the aluminum alloy inner tank 5, and the plurality of horizontal heat sinks 101 and the vertical heat sinks 102 are staggered at 90 degrees;

[0034] When multiple U-shaped battery boxes 1 are connected end to end in sequence, the horizontal heat sink 101 and the vertical heat sink 102 play a role in heat transfer, ensuring that after the multiple U-shaped battery boxes 1 are connected, heat transfer is uninterrupted, achieving uniform and rapid low-temperature protection.

[0035] When the embodiment of the present application is in use, the staff first places the multiple lithium battery cells 6 to be used in the aluminum alloy inner liner 5, and then the staff injects heat transfer oil into the two oil storage chambers 8 of the U-shaped battery box body 1. After the oil is injected, the staff uses a bolted method to seal and install the battery cover 2 on the top of the U-shaped battery box body 1. At this time, the power supply becomes sealed. The staff then energizes the electric heating unit 9. When the power supply temperature is too low, the staff turns on the electric heating unit 9. The electric heating unit 9 generates heat through electric current heating, and combined with the conductivity of the heat transfer oil, the heat can be evenly transferred to the aluminum alloy inner liner 5 and the lithium battery cell 6, thereby ensuring that each battery cell can be fully heated. Compared with the hot air heating structure, each battery cell will not hinder the hot air. The heating structure of the electric heating unit 9 and the heat transfer oil combination has a faster response speed. Once the external ambient temperature drops, the heating rod can quickly heat the heat transfer oil under the control of the staff, thereby quickly raising the temperature of the battery box, which helps to quickly restore the performance of the battery in a low temperature environment.

Claims

1. A low temperature resistant battery box, characterized in that: include: A U-shaped battery box body (1), wherein two sealing plates (3) are symmetrically mounted on the bottom of the U-shaped battery box body (1), and an aluminum alloy inner liner (5) is fixed between the two sealing plates (3); A grille heat-conducting structure, wherein the grille heat-conducting structure is installed on the outer walls of both sides of the aluminum alloy inner container (5); An upper battery cover (2), the upper battery cover (2) being bolted and mounted on the top of the U-shaped battery box body (1); An oil storage chamber (8) is provided on both sides of the interior of a U-shaped battery box body (1); an inverted U-shaped partition frame (7) is installed inside the U-shaped battery box body (1) on one side of the oil storage chamber (8); and an electric heating unit (9) is installed inside the inverted U-shaped partition frame (7).

2. A low temperature resistant battery box according to claim 1, characterized in that: Upper positioning holes (4) for bolting the upper battery cover (2) are provided at the corner positions at the top of the U-shaped battery box body (1).

3. The low temperature resistant battery box according to claim 1, characterized in that: Lower protrusions (201) are fixed on both sides of the bottom of the upper battery cover (2), and the top of the U-shaped battery box body (1) is provided with a sunken portion that matches the lower protrusions (201).

4. The low temperature resistant battery box according to claim 1, characterized in that: The grille heat conduction structure comprises a plurality of transverse heat sinks (101) and a plurality of vertical heat sinks (102) fixed on the outer walls of both sides of the aluminum alloy inner container (5), wherein the plurality of transverse heat sinks (101) and vertical heat sinks (102) are staggered at ninety degrees.

5. The low temperature resistant battery box according to claim 1, characterized in that: The electric heating unit (9) adopts an electric heating rod.

6. The low temperature resistant battery box according to claim 1, characterized in that: The top of the upper battery cover (2) is bonded with thermal insulation cotton.

7. A low temperature resistant power supply, comprising a low temperature resistant battery box as claimed in any one of claims 1 to 6, characterized in that: A plurality of equally spaced lithium battery cells (6) are installed inside the aluminum alloy inner container (5).

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