Full-immersion heat dissipation battery pack

Abstract

The utility model discloses a full-immersion heat dissipation battery pack, and relates to the technical field of design and manufacturing of battery packs. The battery pack comprises a battery pack box body and a battery cell module, insulating cooling liquid is injected into the battery pack box body, the battery cell module is immersed in the insulating cooling liquid in the battery pack box body, the battery pack box body is externally connected with a liquid cooling unit, and the insulating cooling liquid circularly flows between the battery pack box body and the liquid cooling unit under the driving of the liquid cooling unit; a liquid cooling flow channel for an insulating cooling liquid to flow is arranged between the battery cell module and the box wall of the battery pack box body, a cooling liquid supply pipe is also arranged in the liquid cooling flow channel, a liquid outlet is also formed in the cooling liquid supply pipe, and the cooling liquid supply pipe is used for conveying the insulating cooling liquid cooled by a liquid cooling unit to the liquid cooling flow channel from the liquid outlet. According to the full-immersion heat dissipation battery pack disclosed by the utility model, the insulating cooling liquid circularly flows so as to quickly cool the battery cells, and more battery cells can be arranged in the battery pack box body so as to improve the electrical property of the battery pack.

Description

TECHNICAL FIELD

[0001] The utility model relates to the battery pack design manufacturing technical field especially relates to a full immersion heat dissipation battery pack. BACKGROUND

[0002] The prior art discloses a full immersion non-circulation flow liquid cooling type battery energy storage heat management system, wherein the heat management system comprises a liquid cooling battery cabinet, a battery cluster is built in the liquid cooling battery cabinet, and the battery cluster is immersed in insulating cooling liquid; a heat exchanger is installed in the interior of the liquid cooling battery cabinet and is immersed in insulating cooling liquid; and a refrigerating unit is connected with the inflow port and outflow port of the heat exchanger through a heat exchange pipeline and is used for transferring refrigerant to perform refrigeration circulation; the heat management system can completely immerse the battery cluster and the heat exchanger in insulating cooling liquid, can directly produce a strong heat exchange effect on the cooling liquid, reduces the problems of cooling liquid leakage and large power consumption of a high-power pump used in cooling liquid circulation caused by the transmission and heat exchange of the cooling liquid by the external heat exchanger, and can achieve a rapid heat dissipation effect through continuous refrigeration and heat absorption operation of the refrigerant.

[0003] However, the above device still has the following defects:

[0004] 1. When the heat exchanger and the battery cluster are arranged in the battery pack box body containing insulating cooling liquid, the heat exchanger will occupy the containing space of the battery pack box body, so that the loading number of the battery cells of the battery cluster cannot reach the maximum, resulting in waste of the internal space of the battery pack box body and weak performance of the battery pack.

[0005] 2. Since the insulating cooling liquid does not flow, the heat generated by the operation of the battery cells of the battery cluster will gather around the battery cells and can only be gradually transmitted to the heat exchanger through the insulating cooling liquid, instead of being absorbed by the refrigerant in the heat exchanger at the first time, so that the use safety of the battery cells is low, and the actual heat dissipation effect of the whole heat management system is not good. UTILITY MODEL CONTENTS

[0006] The utility model provides a full immersion heat dissipation battery pack, through injecting insulating cooling liquid in the battery pack box body, and making the interior of the battery pack box body communicate with the liquid cooling unit, so that the insulating cooling liquid circulates between the liquid cooling unit and the battery pack box body, and flows in the liquid cooling flow channel in the battery pack box body, to rapidly cool the battery cells, and more battery cells can be arranged in the battery pack box body to improve the electrical performance of the battery pack, so as to solve the above technical problems.

[0007] The utility model discloses a technical scheme that solves the above problems: provide a kind of full-immersion heat dissipation battery pack, the battery pack includes battery pack box and electric core module, the battery pack box is injected with insulating coolant, the electric core module is submerged and is set in the insulating coolant in the battery pack box, the battery pack box is also connected with liquid cooling unit, the insulating coolant is also driven under the liquid cooling unit and circulates between the battery pack box and liquid cooling unit;Liquid cooling flow channel for the insulating coolant flowing is equipped between the electric core module and the tank wall of the battery pack box, cooling liquid supply pipe is also equipped in the liquid cooling flow channel, outlet is also opened on the cooling liquid supply pipe, and the cooling liquid supply pipe is used to transport the insulating coolant after being cooled by liquid cooling unit from outlet to the liquid cooling flow channel.

[0008] Further, the liquid cooling flow channel is provided with a plurality of liquid cooling flow channels, and the plurality of liquid cooling flow channels are parallel to each other, and the plurality of liquid cooling flow channels are arranged along the length direction of the electric core module.

[0009] Further, the outlet is provided with a plurality of outlets, and the plurality of outlets are arranged towards the electric core of the electric core module.

[0010] Further, the liquid cooling flow channel is recessed on the tank wall of the battery pack box.

[0011] Further, the electric core module is provided with a plurality of electric cores, and the adjacent electric cores in the electric core module are provided with a gap for facilitating the flow of the insulating coolant.

[0012] Further, the battery pack box is further provided with an inlet pipe body and an outlet pipe body, the inlet pipe body and the outlet pipe body are in communication with the inside and outside of the battery pack box, and the liquid cooling unit is connected to the inlet pipe body and the outlet pipe body to communicate with the inside of the battery pack box.

[0013] Further, the cooling liquid supply pipe is connected to the inlet pipe body.

[0014] Further, the inlet pipe body and the outlet pipe body are each provided with a plurality of inlet pipe bodies and outlet pipe bodies.

[0015] Further, the battery pack box further includes a box body and a box cover, the box body is formed with a mounting opening upwardly, and the box cover is arranged at the mounting opening.

[0016] Further, the electric core module includes a plurality of electric cores and a plurality of limiting installation supports for fixing and limiting the electric cores.

[0017] Further, the battery pack box is further provided with an explosion-proof valve.

[0018] Further, the battery pack box is further provided with a BMS assembly, and a positive plug-in connector, a negative plug-in connector, a temperature acquisition plug-in connector and a voltage acquisition plug-in connector, all of which are connected with the BMS assembly through a wire harness.

[0019] The utility model discloses beneficial effect:

[0020] 1, the battery pack box is connected to the liquid cooling unit, and only the battery cell module is arranged in the battery pack box, and the battery cell of the battery cell module can cover the whole battery pack box, so that the number of battery cells arranged in the battery pack box is maximized, and the working performance of the battery pack is improved.

[0021] 2, the insulating coolant in the battery pack box can circulate between the battery pack box and the liquid cooling unit under the driving of the liquid cooling unit, and since the insulating coolant always keeps flowing, the heat generated by the battery cell during operation can be quickly absorbed and taken away by the insulating coolant, instead of being gathered around the battery cell, which even leads to high-temperature alarm of the battery pack.

[0022] 3, gaps are arranged between the battery cells, and a liquid cooling flow channel is arranged between the battery cell module and the battery pack box to increase the contact area between the battery cell and the insulating coolant and improve the heat absorption and cooling speed of the insulating coolant on the battery cell.

[0023] 4, the liquid cooling flow channel is provided with a coolant supply pipe, which can spray the insulating coolant to the battery cells that generate relatively obvious heat in the battery pack box through the liquid outlet, so that the heat dissipation speed of the battery cells that generate obvious heat is faster, and the temperature of the battery cells in the battery pack box is kept as consistent as possible, thereby improving the use safety and performance of the battery pack. BRIEF DESCRIPTION OF DRAWINGS

[0024] The accompanying drawings, which are incorporated into and form a part of the specification, illustrate embodiments of the present utility model and, together with the description, serve to explain the principles of the present utility model. In these drawings, similar reference numerals are used to represent similar elements. The drawings in the following description are some embodiments of the present utility model, not all embodiments. For ordinary skilled in the art, other drawings can be obtained from these drawings without creative labor.

[0025] Figure 1 It is the overall structure diagram of the full immersion cooling battery pack of the embodiment;

[0026] Figure 2 It is the overall structure explosion diagram of the full immersion cooling battery pack of the embodiment;

[0027] Figure 3 Structure diagram of the battery pack of the embodiment (part of the battery cells are hidden);

[0028] Figure 4 Structure diagram of the box body of the embodiment;

[0029] Figure 5 is a cross-sectional view of the fully-submerged heat-dissipation battery pack in Figure 1

[0030] Figure 6 is a partial enlarged view of B in Figure 5

[0031] 1-battery pack box, 11-box body, 12-box cover;

[0032] 2-battery cell module, 21-battery cell, 22-limiting installation support;

[0033] 3-liquid cooling flow channel, 4-cooling liquid supply pipe, 41-liquid outlet, 5-liquid inlet pipe body, 6-liquid outlet pipe body. DETAILED DESCRIPTION

[0034] In the present specification, the orientation terms such as up, down, left, right, front, back, front face, back face, top, bottom, etc. mentioned or possibly mentioned are defined with respect to the configuration shown in the drawings, and the words "inner" and "outer" refer to the direction towards or away from the geometric center of a particular component, which are relative concepts, and thus can change accordingly depending on the different positions, different use states. Therefore, these or other orientation terms should not be interpreted as restrictive terms.

[0035] Referring to Figures 1 to 6 , the utility model discloses a fully-submerged heat-dissipation battery pack, and the battery pack includes a battery pack box 1 and a battery cell module 2, a large amount of insulating cooling liquid is injected into the battery pack box 1, the battery cell module 2 is submerged in the insulating cooling liquid in the battery pack box 1, and the heat generated by the battery cell module 2 during operation can be quickly absorbed by the insulating cooling liquid; in addition, the battery pack box 1 is also provided with a liquid inlet pipe body 5 and a liquid outlet pipe body 6, the liquid inlet pipe body 5 and the liquid outlet pipe body 6 are both communicated inside and outside the battery pack box 1, and the outer ports of the liquid inlet pipe body 5 and the liquid outlet pipe body 6 are both connected to a liquid cooling unit, so that the insulating cooling liquid in the battery pack box 1 can flow into the liquid cooling unit along the liquid outlet pipe body 6 to be cooled and cooled, and the insulating cooling liquid with lower temperature in the liquid cooling unit can flow into the battery pack box 1 along the liquid inlet pipe body 5, and circulation is formed, so that the purpose of rapid and efficient heat dissipation is achieved.

[0036] ​​In some embodiments, in order to improve the heat absorption cooling speed of the battery cell module 2, the inlet pipe body 5 and the outlet pipe body 6 are each provided with more than one.

[0037] Please refer to Figure 2 In some embodiments, the battery pack box 1 includes a box body 11 and a box cover 12, the box body 11 is a cuboid, and the upward end face of the box body 11 is provided with a mounting opening with a size comparable to the upward end face. The technician can put the battery cell module 2 into the box body 11 from the mounting opening, and then seal the box cover 12 on the mounting opening to realize the operation of assembling the battery pack.

[0038] Please refer to Figure 3 In some embodiments, in order to improve the heat absorption cooling speed of the battery cell module 2, the inlet pipe body 5 and the outlet pipe body 6 are each provided with more than one. Figure 3 As an example, the battery cell module 2 includes a plurality of battery cells 21 and a plurality of limiting installation supports 22. Except for the battery cells 21 at the left and right ends of the battery cell module 2, every four limiting installation supports 22 clampingly fix one battery cell 21, and there are also shared limiting installation supports 22 between adjacent battery cells 21. The battery cells 21 at the left and right ends of the battery cell module 2 are clampingly fixed by two limiting installation supports 22 and one limiting block.

[0039] In some embodiments, a plurality of battery pack boxes 1 are commonly connected to one liquid cooling unit, and the insulating cooling liquid in the plurality of battery pack boxes 1 can be circulated by one liquid cooling unit under the same control.

[0040] Please refer to Figure 4 、 Figure 5 In some embodiments, in order to improve the heat absorption cooling speed of the battery cell module 2, the bottom wall of the box body 11 is provided with four liquid cooling flow channels 3 side by side, and each liquid cooling flow channel 3 can flow the insulating cooling liquid, so that the insulating cooling liquid can flow from the bottom of the battery cell module 2 to absorb the heat generated at the bottom of the battery cell module 2.

[0041] In addition, in order to avoid the internal installation space of the battery pack box 1 being reduced due to the setting of the liquid cooling flow channel 3, and the number of the battery cells 21 of the battery cell module 2 being reduced, the liquid cooling flow channel 3 is a groove provided at the bottom of the box body 11.

[0042] In some embodiments, in order to improve the heat absorption cooling speed of the battery cell module 2, the side wall of the box body 11 and the bottom of the box cover 12 are also provided with liquid cooling flow channels 3, and the liquid cooling flow channels 3 at the side wall of the box body 11 and the bottom of the box cover 12 are each provided with at least one.

[0043] In some embodiments, in order to improve the heat absorption cooling speed of the battery cell module 2, the side wall of the box body 11 and the bottom of the box cover 12 are also provided with liquid cooling flow channels 3, and the liquid cooling flow channels 3 at the side wall of the box body 11 and the bottom of the box cover 12 are each provided with at least one.

[0044] Please refer to Figure 5 and Figure 6 In some embodiments, the four liquid cooling channels 3 are also provided with cooling liquid supply pipes 4, the four cooling liquid supply pipes 4 are in communication with the liquid inlet pipe body 5, and the four cooling liquid supply pipes 4 are also provided with liquid outlets 41 towards the bottom of the battery cell 21; at this time, the low-temperature insulation cooling liquid can first flow to the battery cell 21 from the liquid outlet 41 to absorb the heat of the battery cell 21 more quickly.

[0045] In addition, in some embodiments, the technician can also use simulation technology to simulate and calculate which positions of the battery cell 21 in the single battery pack work and heat more obviously or strongly, so as to set the position of the liquid outlet 41 at the bottom of the battery cell 21 with relatively obvious heat, so that the temperature of the multiple battery cells 21 in the battery pack box 1 is as consistent as possible, and the temperature balance in the battery pack is ensured.

[0046] In addition, the battery pack box 1 is also provided with an explosion-proof valve for improving the safety of the battery pack, a positive plug-in connector and a negative plug-in connector for connecting external devices, a temperature acquisition plug-in connector for collecting and detecting the temperature of the insulation cooling liquid in the battery pack box 1, and a voltage acquisition plug-in connector for monitoring the output voltage of the battery pack. The above-mentioned positive plug-in connector, negative plug-in connector, temperature acquisition plug-in connector and voltage acquisition plug-in connector are installed and arranged on the battery pack box 1, and are also connected with the BMS component wire harness provided on the battery pack box 1 for controlling the running state of the battery pack.

[0047] The above-mentioned matters not mentioned are applicable to the prior art.

[0048] Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present application, and not to limit them. Although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that they can still modify the technical solutions recorded in the foregoing embodiments, or make equivalent replacement for part of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present application.

Claims

1. A fully immersed and heat dissipating battery pack, characterized by, The battery pack comprises a battery pack box (1) and a battery cell module (2), the battery pack box (1) is filled with insulating cooling liquid, the battery cell module (2) is immersed in the insulating cooling liquid in the battery pack box (1), the battery pack box (1) is further connected with a liquid cooling unit, and the insulating cooling liquid further flows under the driving of the liquid cooling unit to circulate between the battery pack box (1) and the liquid cooling unit; the battery cell module (2) and the box wall of the battery pack box (1) are provided with a liquid cooling flow channel (3) for the flow of the insulating cooling liquid, the liquid cooling flow channel (3) is further provided with a cooling liquid supply pipe (4), the cooling liquid supply pipe (4) is further provided with a liquid outlet (41), and the cooling liquid supply pipe (4) is used for conveying the insulating cooling liquid cooled by the liquid cooling unit from the liquid outlet (41) to the liquid cooling flow channel (3).

2. The fully submerged, heat dissipating battery pack of claim 1, wherein, The liquid cooling flow channel (3) is provided with a plurality of liquid cooling flow channels (3), the plurality of liquid cooling flow channels (3) are parallel to each other, and the plurality of liquid cooling flow channels are arranged along the length direction of the battery cell module.

3. The fully submerged, heat dissipating battery pack of claim 1, wherein, The liquid outlet (41) is provided with a plurality of liquid outlets (41), and the plurality of liquid outlets are arranged towards the battery cell of the battery cell module (2).

4. The fully submerged, heat dissipating battery pack of claim 1, wherein, The liquid cooling flow channel (3) is recessed on the box wall of the battery pack box (1).

5. The fully submerged, heat dissipating battery pack of claim 1, wherein, The adjacent battery cells (21) in the battery cell module (2) are provided with gaps for the flow of the insulating cooling liquid.

6. The fully submerged, heat dissipating battery pack of claim 1, wherein, The battery pack box (1) is further provided with an inlet pipe body (5) and an outlet pipe body (6), the inlet pipe body (5) and the outlet pipe body (6) are both connected to the inside and outside of the battery pack box (1), and the liquid cooling unit is connected to the inside of the battery pack box (1) through the inlet pipe body (5) and the outlet pipe body (6).

7. The fully submerged, heat dissipating battery pack of claim 6, wherein, The cooling liquid supply pipe (4) is connected to the inlet pipe body (5).

8. The fully submerged, heat dissipating battery pack of claim 6, wherein, The inlet pipe body (5) and the outlet pipe body (6) are both provided with a plurality of pipe bodies.

9. The fully submerged, heat dissipating battery pack of claim 1, wherein, The battery pack box (1) further comprises a box body (11) and a box cover (12), the box body (11) is upwardly provided with a mounting opening, and the box cover (12) is sealingly arranged at the mounting opening.

10. The fully submerged, heat dissipating battery pack of claim 1, wherein, The battery cell module (2) comprises a plurality of battery cells (21) and a plurality of limiting installation supports (22) for fixing and limiting the battery cells (21).

Images