Battery pack shell, battery pack and electric equipment

Abstract

The embodiment of the utility model provides a battery pack shell, a battery pack and electric equipment, and relates to the technical field of batteries, the battery pack shell comprises a body, and the body is internally provided with a containing cavity, a first channel and a second channel. The accommodating cavity is used for accommodating a battery module, a preset gap is formed between the inner wall of the accommodating cavity and the battery module, the preset gap is used for arranging a pole of the battery module, and the first channel and the second channel are respectively communicated with the preset gap. The body is provided with an air inlet and an air outlet, the air inlet is communicated with the first channel, and the air outlet is communicated with the second channel. And the air inlet and the air outlet are respectively connected with an air cooling system so as to be at least used for performing air cooling heat dissipation on each pole on the battery module. According to the battery pack shell provided by the embodiment of the invention, the high temperature at each pole and the connecting piece on the battery module can be avoided or reduced, so that the use performance of the battery is ensured.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of batteries, in particular to a battery pack shell, a battery pack and an electric device. BACKGROUND

[0002] In recent years, as the charging speed of batteries is continuously improved, the charging current is also increased, which leads to more serious heating of the pole. Therefore, the cooling of the pole during fast charging of the high-rate battery has become one of the problems to be solved.

[0003] However, the existing air cooling structure still has poor heat dissipation performance at each pole of the battery module in the battery pack, thereby affecting the performance of the battery. CONTENT OF THE UTILITY MODEL

[0004] Therefore, the present application provides a battery pack shell, a battery pack and an electric device to solve the problem of poor heat dissipation performance at each pole of the battery module in the existing air cooling structure.

[0005] In a first aspect, the present application provides a battery pack shell, comprising a body, the body having a receiving cavity, a first channel and a second channel;

[0006] The receiving cavity is used for accommodating the battery module, a preset gap is formed between the inner wall of the receiving cavity and the battery module, the preset gap is used for arranging the poles of the battery module, and the first channel and the second channel are respectively communicated with the preset gap;

[0007] The body is provided with an air inlet and an air outlet, the air inlet is communicated with the first channel, and the air outlet is communicated with the second channel;

[0008] The air inlet and the air outlet are respectively used for connecting an air cooling system to at least cool and dissipate heat of each pole of the battery module.

[0009] In a possible implementation, the first channel is communicated with one side of the preset gap, and the second channel is communicated with the other side of the preset gap.

[0010] In a possible implementation, the first channel and the second channel are respectively located at opposite sides of the receiving cavity.

[0011] In a possible implementation, the first channel and the second channel are respectively located at opposite sides of the receiving cavity.

[0012] In a possible implementation, the receiving cavity is spaced apart multiple times along a first direction, the first channel and the second channel are respectively stacked multiple times along a second direction, and the first channel and the second channel respectively correspond to the receiving cavity one by one.

[0013] Wherein, the first direction intersects the second direction.

[0014] In a possible implementation, two converging cavities are arranged in the body, the air inlet and each first channel are communicated through one converging cavity;

[0015] The air outlet and each second channel are communicated through another converging cavity.

[0016] In a possible implementation, at least one explosion-proof valve is further included, at least one explosion-proof opening is arranged on the body, the explosion-proof opening is communicated with the first channel or the second channel, and the explosion-proof valve seals the explosion-proof opening.

[0017] In a possible implementation, control valves are arranged between the air inlet and the air outlet and the air cooling system respectively, and the control valves are used to close the air inlet and the air outlet when the battery module is in thermal runaway.

[0018] In a possible implementation, at least one cold plate is further included, at least one opening is arranged on at least one side of the body, and the opening is communicated with at least the accommodating cavity;

[0019] A cold plate cover is arranged on the body to seal the opening and is used to contact one side of the battery module.

[0020] In a second aspect, the application further provides a battery pack, the battery module and any one of the battery pack shells provided in the first aspect, and the battery module is arranged in the accommodating cavity.

[0021] In a third aspect, the application further provides a power consumption device, including a device body, and the device body is provided with the battery pack provided in the second aspect.

[0022] The battery pack shell, the battery pack and the power consumption device provided in the application, the battery pack shell includes a body, the battery module is arranged in the accommodating cavity by arranging the accommodating cavity, the first channel and the second channel in the body, the preset gap is formed between the inner wall of the accommodating cavity and the battery module, the pole of the battery module is arranged in the preset gap, the first channel and the second channel are respectively communicated with the preset gap, the air duct is formed along the direction of the first channel, the communication of the preset gap and the second channel, the air inlet is communicated with the first channel by arranging the air inlet and the air outlet on the body, the air outlet is communicated with the second channel, the air inlet and the air outlet are respectively connected with the air cooling system, so as to at least air cool and radiate heat for each pole of the battery module, avoid or reduce the high temperature at each pole and the connecting piece of the battery module, and ensure the use performance of the battery. BRIEF DESCRIPTION OF DRAWINGS

[0023] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiments or prior art description. Obviously, the drawings in the following description are some embodiments of the present application, and for those skilled in the art, other drawings can also be obtained from these drawings without creative labor.

[0024] Figure 1 Part structure schematic diagram of the battery pack provided by the embodiments of the present application;

[0025] Figure 2 For Figure 1 Schematic diagram of the cross-sectional structure along A-A section.

[0026] Reference signs:

[0027] 10: battery module;

[0028] 11: connecting piece;

[0029] 100: body;

[0030] 101: air inlet;

[0031] 102: air outlet;

[0032] 103: vent;

[0033] 110: accommodating cavity;

[0034] 120: first channel;

[0035] 130: second channel;

[0036] 140: first confluence cavity;

[0037] 150: explosion-proof opening;

[0038] 200: explosion-proof valve;

[0039] 300: cold plate. DETAILED DESCRIPTION

[0040] The exemplary embodiments will be described in detail herein with reference to the accompanying drawings. When the following description refers to the drawings, the same numbers in different drawings represent the same or similar elements unless otherwise indicated. The implementations described in the following exemplary embodiments do not represent all implementations consistent with the present application. Instead, they are merely examples consistent with some aspects of the present application as detailed in the appended claims.

[0041] The terms “first,” “second,” “third,” “fourth,” etc. (if present) in the specification, claims, and accompanying drawings of this application are used to distinguish similar objects and are not necessarily used to describe a particular order or sequence. It should be understood that such data can be interchanged where appropriate so that embodiments of the application described herein can be implemented, for example, in orders other than those illustrated or described herein. Furthermore, the terms “comprising” and “having,” and any variations thereof, are intended to cover a non-exclusive inclusion; for example, a process, method, system, product, or apparatus that comprises a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or apparatus.

[0042] As mentioned in the background section, direct cooling cannot meet the fast charging requirements of high-rate batteries. Liquid cooling cannot guarantee the insulation at the terminals. Since the terminals or connecting pieces are high-voltage connections, the liquid cooling plates or pipes are generally made of metals with high thermal conductivity. The liquid cooling plate being in close contact with the terminals or connecting pieces increases the risk of arcing. Adding extra heat dissipation components to the cold plate significantly increases manufacturing and assembly difficulty. Existing air-cooled structures only allow natural airflow to the terminals, resulting in poor heat dissipation performance and making them difficult to integrate with existing liquid cooling solutions.

[0043] To address the aforementioned problems in the prior art, this application provides a battery pack housing, a battery pack, and an electrical device. The battery pack housing provided by this application includes a body. A receiving cavity, a first channel, and a second channel are provided within the body. A battery module is placed within the receiving cavity, creating a preset gap between the inner wall of the receiving cavity and the battery module. The terminal posts of the battery module are disposed within the preset gap. The first channel and the second channel are respectively connected to the preset gap. An air duct is formed along the direction connecting the first channel, the preset gap, and the second channel. An air inlet and an air outlet are provided on the body, with the air inlet connected to the first channel and the air outlet connected to the second channel. The air inlet and air outlet are respectively connected to a cooling system to provide air cooling for at least each terminal post of the battery module, avoiding or reducing high temperatures at the terminal posts and connecting pieces of the battery module, thereby ensuring the battery's performance.

[0044] The technical solutions of this application will be described in detail below with specific embodiments. The following specific embodiments can be combined with each other, and the same or similar concepts or processes may not be described again in some embodiments.

[0045] Firstly, please refer to Figures 1-2 As shown, this application embodiment provides a battery pack housing, including a body 100, the body 100 having a receiving cavity 110, a first channel 120 and a second channel 130.

[0046] The accommodating cavity 110 is used for accommodating the battery module 10, and a preset gap is formed between the inner wall of the accommodating cavity 110 and the battery module 10, which is used for arranging the pole of the battery module 10. The first channel 120 and the second channel 130 are respectively communicated with the preset gap.

[0047] The body 100 is provided with an air inlet 101 and an air outlet 102. The air inlet 101 is communicated with the first channel 120, and the air outlet 102 is communicated with the second channel 130.

[0048] The air inlet 101 and the air outlet 102 are respectively used for connecting the air cooling system, so as to at least cool and radiate the poles of the battery module 10.

[0049] The body 100 in the embodiment is used for accommodating the battery module 10 and other components, which can be a cuboid frame structure. One or more accommodating cavities 110 can be arranged in the body 100, and the shape and size of the accommodating cavity 110 are matched with the shape of the battery module 10. One or more first channels 120 and second channels 130 are arranged in the body 100. The first channel 120 is used for at least air inlet, and the second channel 130 is used for at least air outlet. The first channel 120 and the second channel 130 are respectively communicated with the accommodating cavity 110.

[0050] The battery module 10 is stacked by a plurality of battery cells, and has a pole and a connecting piece 11 on one side or opposite sides. The battery module 10 is arranged in the accommodating cavity 110. A preset gap is left between the side of the battery module 10 close to the pole and the inner wall of the accommodating cavity 110, so that the air passes through the preset gap. The preset gap is respectively communicated with the first channel 120 and the second channel 130.

[0051] Moreover, the body 100 is further provided with an air inlet 101 and an air outlet 102. The air inlet 101 is communicated with the first channel 120 and is used for connecting the cold air outlet of the air cooling system. The air outlet 102 is communicated with the second channel 130 and is used for connecting the cold air inlet of the air cooling system, so as to form an air cooling circulation loop.

[0052] Specifically, as shown in the figure, Figure 1 The cold air in the air cooling system enters the preset gap through the air inlet 101 and the first channel 120, and can cool and radiate the poles, the connecting piece 11 and part of the end face of the battery module 10. The air after sufficient heat exchange returns to the air cooling system through the second channel 130 and the air outlet 102.

[0053] It should be noted that the preset gap can be determined according to actual needs, which is not limited in the embodiment.

[0054] It can be understood that the battery pack shell in the embodiment of the application uses the forced air cooling system to perform forced air cooling heat dissipation on each pole column, the connecting piece 11 and part of the cell end face of the battery module 10, can avoid or reduce the high temperature at each pole column and the connecting piece 11 of the battery module 10, can meet the fast charging requirement of the high-rate cell, and thus the use performance of the battery is ensured.

[0055] It should be noted that the battery pack shell can further be provided with a cold plate, a controller and the like to ensure the normal operation of the battery, and the specific component parts can be determined according to actual requirements.

[0056] Therefore, the battery pack shell provided in the embodiment of the application includes the body 100, the battery module 10 is arranged in the accommodating cavity 110 by arranging the accommodating cavity 110, the first channel 120 and the second channel 130 in the body 100, a preset gap is formed between the inner wall of the accommodating cavity 110 and the battery module 10, the pole column of the battery module 10 is arranged in the preset gap, the first channel 120 and the second channel 130 are arranged to be communicated with the preset gap, the air duct is formed along the direction of the first channel 120, the preset gap and the second channel 130, the air inlet 101 and the air outlet 102 are arranged on the body 100, the air inlet 101 is communicated with the first channel 120, and the air outlet 102 is communicated with the second channel 130, the air inlet 101 and the air outlet 102 are arranged to be connected with the air cooling system, so as to perform air cooling heat dissipation on at least each pole column of the battery module 10, avoid or reduce the high temperature at each pole column and the connecting piece 11 of the battery module 10, and thus the use performance of the battery is ensured.

[0057] In a possible design, the first channel 120 is communicated with one side of the preset gap, and the second channel 130 is communicated with the other side of the preset gap.

[0058] In this way, as shown in Figure 1 , the air can pass through each pole column of the battery module 10 in turn, and air cooling heat dissipation is performed on all the pole columns and the connecting piece 11 as much as possible, and the coverage is more comprehensive.

[0059] Further, in the embodiment, the first channel 120 and the second channel 130 are respectively located at opposite sides of the accommodating cavity 110.

[0060] That is, the first channel 120 and the second channel 130 are arranged in parallel and respectively located at opposite sides of the accommodating cavity 110, the extension direction of the first channel 120 or the second channel 130 is arranged along the X-axis direction in Figure 1 , and the extension direction of the preset gap is arranged along the Z-axis direction in Figure 1 , which is more reasonable.

[0061] Further, in the embodiment, the first channel 120 and the second channel 130 are both provided with a ventilation opening 103 corresponding to a preset gap between the accommodation cavity 110.

[0062] Specifically, as shown in the drawings, the first channel 120 and the second channel 130 are both provided with a ventilation opening 103 between the accommodation cavity 110, which is convenient for processing and has a more compact structure. Figure 1

[0063] The size of the ventilation opening 103 should meet the requirements of heat dissipation and exhaust at the same time, and the specific size, position, etc. can be determined according to actual needs, which are not limited in the embodiment.

[0064] In some embodiments, the accommodation cavities 110 are spaced apart along a first direction, and the first channels 120 and the second channels 130 are respectively stacked along a second direction, and the first channels 120 and the second channels 130 respectively correspond to the accommodation cavities 110 one by one.

[0065] The first direction intersects the second direction.

[0066] Exemplarily, as shown in the drawings, the accommodation cavities 110 are provided in three and are spaced apart along the first direction, such as along the X-axis direction in the drawings. Figure 1 Figure 1 The number of battery modules 10 corresponds to the number of accommodation cavities 110, which is convenient for simultaneously installing multiple battery modules 10.

[0067] In addition, the first channels 120 and the second channels 130 are respectively provided in three and are respectively stacked along the second direction, such as along the Y-axis direction in the drawings, and the number of the first channels 120 and the second channels 130 respectively corresponds to the number of the accommodation cavities 110. Figure 2 That is, one first channel 120 and one second channel 130 correspond to one accommodation cavity 110 and are individually air-cooled and heat-dissipated, which has better temperature distribution uniformity.

[0068] Of course, more or fewer numbers of the first channels 120, the second channels 130 and the accommodation cavities 110 can also be provided, which can be determined according to actual needs, and the embodiment does not limit too much.

[0069] Further, in the embodiment, two converging cavities 140 are provided in the body 100, and the air inlet 101 and each first channel 120 are connected through one converging cavity 140.

[0070] The air outlet 102 and each second channel 130 are connected through another converging cavity 140.

[0071] Exemplarily, as shown in the drawings, the accommodation cavities 110 are provided in three and are spaced apart along the first direction, such as along the X-axis direction in the drawings.

[0072] Figure 1 ​​​As shown, two converging cavities 140 are arranged in the body 100, one of the converging cavities 140 is close to the air inlet 101, and the air inlet 101 is communicated with each first channel 120 through the converging cavity 140, and the other converging cavity 140 is close to the air outlet 102, and the air outlet 102 is communicated with each second channel 130 through the converging cavity 140, which is convenient for the shunt or confluence of the air.

[0073] Wherein, the specific shape, size, etc. of the converging cavity 140 can be determined according to actual needs, and the embodiment is not limited too much.

[0074] In some embodiments, at least one explosion-proof valve 200 is further included, and at least one explosion-proof opening 150 is arranged on the body 100, the explosion-proof opening 150 is communicated with the first channel 120 or the second channel 130, and the explosion-proof valve 200 closes the explosion-proof opening 150.

[0075] That is, as Figure 1 As shown, the first channel 120 and the second channel 130 can also be used as exhaust channels when the battery module 10 appears thermal runaway, and the integration is higher.

[0076] Specifically, as Figure 1 As shown, two explosion-proof openings 150 are arranged on the body 100, one of the explosion-proof openings 150 is close to the air inlet 101, and the explosion-proof opening 150 is communicated with the first channel 120, and the other explosion-proof opening 150 is close to the air outlet 102, and the explosion-proof opening 150 is communicated with each second channel 130, and the explosion-proof valve 200 is installed in the explosion-proof opening 150.

[0077] Of course, the explosion-proof opening 150 and the explosion-proof valve 200 can also be arranged only at the air inlet 101 or the air outlet 102, and the actual needs can be determined, and the embodiment is not limited too much.

[0078] Further, in the embodiment, the air inlet 101 and the air outlet 102 are respectively provided with control valves between the air inlet 101 and the air outlet 102 and the air cooling system, and the control valves are used to close the air inlet 101 and the air outlet 102 when the battery module 10 appears thermal runaway.

[0079] Specifically, as shown in the figure, when the battery module 10 appears thermal runaway, a large amount of gas is generated in the battery module 10, the air inlet 101 and the air outlet 102 are closed, and the gas can be discharged through the explosion-proof valve 200, avoiding the gas directly entering the air cooling system.

[0080] Wherein, the control valve can be a solenoid valve, a check valve or a self-operated differential pressure regulating valve, and the specific type, position, etc. of the control valve can be determined according to actual needs, and the embodiment is not limited.

[0081] In some embodiments, at least one cold plate 300 is also included, and the body 100 has an opening on at least one side, the opening being in communication with at least the receiving cavity 110.

[0082] A cold plate 300 is placed on the body 100 to close the opening and to make contact with one side of the battery module 10.

[0083] In one example, such as Figure 1 , Figure 2 As shown, the main body 100 has openings at both the top and bottom, which are connected to the receiving cavity 110. Two cold plates 300 are respectively covered on the main body 100, which respectively close the upper and lower openings. The two cold plates 300 are in contact with the upper and lower surfaces of the battery module 10 to exchange heat between the upper and lower surfaces of the battery module 10.

[0084] In another example, not shown in the figure, the body 100 has an opening, that is, an opening on one side of the upper surface, which communicates with the receiving cavity 110. The cold plate 300 is placed on the body 100 to close the upper opening, and the cold plate 300 is in contact with the upper surface of the battery module 10 to exchange heat with the upper surface of the battery module 10.

[0085] The cold plate 300 can be connected to the body 100 by means of welding, screwing, snapping, or bonding. This embodiment does not make specific limitations on this.

[0086] Secondly, this application also provides a battery pack, including a battery module 10 and a battery pack housing provided in any of the above embodiments, wherein the battery module 10 is disposed in a receiving cavity 110.

[0087] The structure of the battery pack casing has been described in detail in the above embodiments and will not be repeated here.

[0088] The battery pack provided by the embodiments of the present application is configured with a battery pack shell, the battery pack shell comprises a body 100, a containing cavity 110, a first channel 120 and a second channel 130 are arranged in the body 100, the battery module 10 is arranged in the containing cavity 110, a preset gap is formed between the inner wall of the containing cavity 110 and the battery module 10, the pole column of the battery module 10 is arranged in the preset gap, the first channel 120 and the second channel 130 are arranged to be communicated with the preset gap, an air duct is formed along the direction of the first channel 120, the preset gap and the second channel 130, the air inlet 101 is arranged on the body 100 and communicated with the first channel 120, and the air outlet 102 is arranged on the body 100 and communicated with the second channel 130, the air inlet 101 and the air outlet 102 are connected with the air cooling system, so that the pole columns of the battery module 10 are cooled and radiated, the high temperature at the pole columns and the connecting piece 11 of the battery module 10 is avoided or reduced, and the use performance of the battery is ensured.

[0089] In a third aspect, the embodiments of the present application also provide a power consumption device, which comprises a device body, and the device body is provided with the battery pack provided by any of the embodiments.

[0090] The power consumption device provided by the embodiments of the present application is configured with the battery pack, the battery pack has a battery pack shell, the battery pack shell comprises a body 100, a containing cavity 110, a first channel 120 and a second channel 130 are arranged in the body 100, the battery module 10 is arranged in the containing cavity 110, a preset gap is formed between the inner wall of the containing cavity 110 and the battery module 10, the pole column of the battery module 10 is arranged in the preset gap, the first channel 120 and the second channel 130 are arranged to be communicated with the preset gap, an air duct is formed along the direction of the first channel 120, the preset gap and the second channel 130, the air inlet 101 is arranged on the body 100 and communicated with the first channel 120, and the air outlet 102 is arranged on the body 100 and communicated with the second channel 130, the air inlet 101 and the air outlet 102 are connected with the air cooling system, so that the pole columns of the battery module 10 are cooled and radiated, the high temperature at the pole columns and the connecting piece 11 of the battery module 10 is avoided or reduced, and the use performance of the battery is ensured.

[0091] Other embodiments of the application will be apparent to those skilled in the art from consideration of the specification and practice of the application disclosed herein. It is intended that the specification and examples be considered as exemplary only, with the true scope and spirit of the application being indicated by the following claims.

[0092] It is to be understood that the application is not limited to the precise construction herein described and shown in the accompanying drawings, and that various modifications and changes can be made by those skilled in the art without departing from the scope thereof. The scope of the application is limited only by the appended claims.

Claims

1. A battery pack housing, characterized by, The application relates to a battery module cooling device, which comprises a body (100) provided with a containing cavity (110), a first channel (120) and a second channel (130) in the body (100). The containing cavity (110) is used for containing a battery module (10), a preset gap is formed between the inner wall of the containing cavity (110) and the battery module (10), the preset gap is used for arranging a pole of the battery module (10), and the first channel (120) and the second channel (130) are respectively communicated with the preset gap. The body (100) is provided with an air inlet (101) and an air outlet (102), the air inlet (101) is communicated with the first channel (120), and the air outlet (102) is communicated with the second channel (130). The air inlet (101) and the air outlet (102) are respectively used for connecting a forced air cooling system, so as to at least air cool and radiate each pole on the battery module (10).

2. The battery pack housing of claim 1, wherein, The first channel (120) is communicated with one side of the preset gap, and the second channel (130) is communicated with the other side of the preset gap.

3. The battery pack enclosure of claim 2, wherein, The first channel (120) and the second channel (130) are respectively arranged on opposite sides of the containing cavity (110).

4. The battery pack enclosure of claim 3, wherein, Ventilation openings (103) are respectively left between the first channel (120) and the second channel (130) and the containing cavity (110), and the ventilation openings (103) correspond to the preset gap.

5. The battery pack enclosure of claim 1, wherein, A plurality of containing cavities (110) are arranged along a first direction, a plurality of first channels (120) and a plurality of second channels (130) are respectively arranged in a stacking mode along a second direction, and the first channels (120) and the second channels (130) respectively correspond to the containing cavities (110) one by one. The first direction intersects the second direction.

6. The battery pack enclosure of claim 5, wherein, Two converging cavities (140) are arranged in the body (100), the air inlet (101) and each first channel (120) are communicated through one converging cavity (140), and the air outlet (102) and each second channel (130) are communicated through another converging cavity (140). At least one explosion-proof valve (200) is further arranged, at least one explosion-proof opening (150) is arranged on the body (100), the explosion-proof opening (150) is communicated with the first channel (120) or the second channel (130), and the explosion-proof valve (200) seals the explosion-proof opening (150).

7. The battery pack enclosure of claim 1, wherein, Control valves are respectively arranged between the air inlet (101) and the air outlet (102) and the forced air cooling system, and the control valves are used for closing the air inlet (101) and the air outlet (102) when the battery module (10) appears thermal runaway.

8. The battery pack enclosure of claim 7, wherein, At least one cold plate (300) is further arranged, at least one side of the body (100) is provided with an opening, and the opening is communicated with at least the containing cavity (110).

9. The battery pack enclosure of any one of claims 1 to 8, wherein, The cold plate (300) is arranged on the body (100) to seal the opening and contact one side of the battery module (10). ​ 10. A battery pack, characterized by, The battery module (10) is arranged in the accommodating cavity (110).

11. An electrical device, characterized by The device body is provided with the battery pack as claimed in claim 10.

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