Cold plate and battery pack with same

Abstract

The invention discloses a cold plate and a battery pack with the same, and relates to the field of cooling and heat dissipation. The cold plate is provided with a cooling medium flow channel and an exhaust channel which are arranged at intervals, and the cold plate is provided with at least two one-way blasting structures. The one-way blasting structure comprises a first one-way blasting structure and a second one-way blasting structure; the first one-way blasting structure is arranged corresponding to the cooling medium flow channel and faces the battery cell from the cooling medium flow channel; and the second one-way blasting structure is arranged corresponding to the exhaust channel and faces the exhaust channel from the battery cell. According to the embodiment of the invention, air can be quickly exhausted and a cooling medium is introduced during thermal runaway, so that the reliability and the safety of the battery pack are ensured.

Description

Technical Field

[0001] The present invention relates to the field of cooling and heat dissipation, and in particular to a cold plate and a battery pack having the same. Background Art

[0002] The cold plate of a traditional battery pack mainly focuses on reducing the temperature of the battery cells in the battery pack by circulating the cooling medium. However, in extreme cases, such as thermal runaway, the high-temperature and high-pressure gas generated inside the battery pack cannot be quickly discharged, resulting in pressure accumulation and increased risk of explosion.

[0003] Therefore, there is room for improvement in cold plates. Summary of the invention

[0004] The present invention aims to solve at least one of the technical problems existing in the prior art. To this end, the first aspect of the present invention provides a cold plate, which can quickly exhaust gas and introduce cooling medium in the event of thermal runaway to ensure the reliability and safety of the battery pack.

[0005] A second aspect of the present invention is to provide a battery pack.

[0006] According to the cold plate of the battery pack of the first aspect embodiment of the present invention, the cold plate is provided with a cooling medium flow channel and an exhaust channel spaced apart from each other, and at least two one-way explosion structures are provided on the cold plate; the one-way explosion structure includes: a first one-way explosion structure arranged corresponding to the cooling medium flow channel and extending from the cooling medium flow channel toward the battery cell; and a second one-way explosion structure arranged corresponding to the exhaust channel and extending from the battery cell toward the exhaust channel.

[0007] According to the cold plate of the battery pack of the embodiment of the present invention, by providing a first one-way explosion structure, it can rupture in the case of thermal runaway, allowing the cooling medium to quickly flow into the battery cell, thereby reducing the temperature of the battery cell and delaying or preventing the further development of thermal runaway. By providing a second one-way explosion structure, it can rupture in the case of thermal runaway, thereby allowing the high-temperature and high-pressure gas in the battery pack to be quickly discharged from the battery pack, thereby effectively alleviating the high-pressure environment inside the battery pack and avoiding the risk of explosion that may be caused by continuous pressure accumulation.

[0008] According to the cold plate of the battery pack of the first embodiment of the present invention, an exhaust port connected to the exhaust channel is provided on the cold plate, and the exhaust port is used to be arranged toward the outside of the battery pack.

[0009] In some optional embodiments, the one-way explosion structure further includes: a third one-way explosion structure provided at the exhaust port and extending from the exhaust passage toward the outside of the battery pack.

[0010] In some optional embodiments, the cold plate of the battery pack further includes: a sensor, wherein the sensor is disposed at the exhaust port to detect the pressure and / or temperature of the gas.

[0011] According to the cold plate of the battery pack of some embodiments of the present invention, the exhaust channel is provided along an edge of the cold plate.

[0012] According to the cold plate of the battery pack in some embodiments of the present invention, there are a plurality of first one-way explosion structures, which are arranged at intervals along the length direction of the exhaust channel.

[0013] In some optional embodiments, the exhaust channel includes: a first channel section, a second channel section, a third channel section and a fourth channel section connected in sequence, and the fourth channel section is connected to the first channel section; the exhaust port is arranged on the first channel section, and the second channel section, the third channel section and the fourth channel section are all provided with the first unidirectional explosion structure.

[0014] According to the cold plate of the battery pack of some embodiments of the present invention, the cold plate has a medium inlet and a medium outlet connected to the cooling medium flow channel; the cooling medium flow channel includes: a plurality of first flow channels and a plurality of second flow channels, one end of the plurality of first flow channels is connected to the medium inlet; one end of the plurality of second flow channels is connected to the medium outlet; the other end of each of the second flow channels is connected to at least one of the first flow channels, and the other end of each of the first flow channels is connected to at least one of the second flow channels; there are a plurality of second unidirectional bursting structures, and they are arranged at intervals on the cooling medium flow channel.

[0015] In some optional embodiments, the medium inlet and the medium outlet are located on the same side of the cold plate; the cooling medium flow channel includes: a first connecting channel, one end of the first connecting channel is connected to the medium inlet, and the other end of the first connecting channel forms a fork to connect at least two of the first flow channels; a second connecting channel, one end of the second connecting channel is connected to the medium outlet, and the other end of the second connecting channel forms a fork to connect at least two of the second flow channels; a third connecting channel, one end of the third connecting channel is connected to the first flow channel, and the other end is connected to the second flow channel, and the third connecting channel is located on a side of the cold plate away from the medium inlet; the second unidirectional bursting structure is respectively arranged on the first connecting channel, the second connecting channel, and the third connecting channel.

[0016] In some optional embodiments, there are two medium outlets located on both sides of the medium inlet; there are two second connecting channels located on both sides of the first connecting channel; the exhaust channel is annular and is arranged around the outside of the cooling medium flow channel.

[0017] According to some embodiments of the cold plate of the battery pack of the present invention, at least one of the one-way explosion structures includes: a thinning hole formed on the cold plate.

[0018] Optionally, at least one of the one-way blasting structures comprises a plurality of the thinning holes, and the plurality of the thinning holes are arranged at intervals along the circumferential direction.

[0019] According to some embodiments of the present invention, a cold plate of a battery pack is provided with reinforcing ribs on the cold plate corresponding to the one-way explosion structure, and the reinforcing ribs are located on a side of the cold plate away from the battery cells.

[0020] A battery pack according to an embodiment of the second aspect of the present invention comprises: a box body, a battery cell and a cold plate, wherein the box body is provided with a accommodating cavity; the battery cell is arranged in the accommodating cavity; the cold plate is the cold plate of the battery pack according to any one of claims 1-13, the cold plate is arranged on the box body, and the one-way explosion structure is arranged toward the accommodating cavity.

[0021] In the battery pack according to some embodiments of the present invention, the box body includes a top cover, and the cold plate is disposed on the top cover.

[0022] Optionally, the cold plate and the top cover are integrally formed.

[0023] Additional aspects and advantages of the present invention will be given in part in the following description and in part will be obvious from the following description, or will be learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] The above and / or additional aspects and advantages of the present invention will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0025] Figure 1 A cross-sectional view of a cold plate of a battery pack in some embodiments of the present invention;

[0026] Figure 2 A schematic diagram of the arrangement of cooling medium flow channels and exhaust flow channels of a cold plate in some embodiments of the present invention;

[0027] Figure 3 A schematic diagram of the arrangement of the exhaust flow channels of the cold plate in some embodiments of the present invention;

[0028] Figure 4 A schematic diagram of the arrangement of cooling medium channels of a cold plate in some embodiments of the present invention;

[0029] Figure 5 A schematic diagram of the position of the sensor of the cold plate in some embodiments of the present invention;

[0030] Figure 6 It is a schematic diagram of the structure of a one-way bursting knot in some embodiments of the present invention;

[0031] Figure 7 for Figure 3 A local enlarged schematic diagram of point A in the middle.

[0032] Reference numerals:

[0033] Battery Pack 1000,

[0034] Cold plate 100, cooling medium flow channel 10, first flow channel 11, second flow channel 12, first connecting channel 14, second connecting channel 15, third connecting channel 16, exhaust flow channel 30, first channel section 31, second channel section 32, third channel section 33, fourth channel section 34, exhaust port 40, one-way bursting structure 50, first one-way bursting structure 51, second one-way bursting structure 52, third one-way bursting structure 53, thinning hole 54, medium inlet 61, medium outlet 62, sensor 70, reinforcing rib 90,

[0035] Box body 200, accommodating cavity 201,

[0036] Battery cells 300. DETAILED DESCRIPTION

[0037] Embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0038] In the description of the present invention, it should be understood that the terms "top", "bottom", "inside", "outside", "circumferential", etc. indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation and be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention. In addition, features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, unless otherwise specified, "plurality" means two or more.

[0039] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected" and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0040] Reference below Figure 1-Figure 7 A cold plate 100 of a battery pack according to an embodiment of a first aspect of the present invention is described.

[0041] like Figure 1-Figure 2 As shown, a cooling medium flow channel 10 and an exhaust channel 30 are provided on the cold plate 100 of the battery pack according to an embodiment of the present invention.

[0042] The cooling medium flow channel 10 is used to pass a cooling medium, such as a refrigerant, to maintain the battery cells 300 in the battery pack 1000 within a suitable temperature range.

[0043] Specifically, during the normal operation of the battery pack 1000, the cooling medium circulates in the cooling medium flow channel 10, removes the heat generated by the battery cell 300 through heat exchange, and prevents the battery cell 300 from overheating.

[0044] The cooling medium flow channel 10 is a continuous channel to ensure that the cooling medium can be evenly distributed and fully contact the battery core 300, while achieving continuous heat exchange.

[0045] The exhaust channel 30 is disposed on the cold plate 100 and is spaced apart from the cooling medium flow channel 10 .

[0046] Under normal circumstances, the exhaust passage 30 remains closed or sealed to prevent external gas or moisture from intruding, thereby protecting the normal operation and safety of the battery pack 1000 .

[0047] However, in some extreme cases, such as when the battery pack 1000 experiences thermal runaway, high-temperature and high-pressure gas may be generated inside the battery pack 1000. If such gas cannot be discharged in time, it may cause certain damage to the battery pack 1000 itself or even the surrounding area.

[0048] In order to alleviate the high temperature and high pressure of the battery pack 1000, at least two one-way explosion structures 50 are provided on the cold plate 100 in the embodiment of the present invention. Figure 1 and Figure 2 The one-way blasting structure 50 includes: a first one-way blasting structure 51 and a second one-way blasting structure 52 .

[0049] Among them, combined Figure 1 and Figure 4 The first one-way explosion structure 51 is disposed corresponding to the cooling medium flow channel 10 and extends from the cooling medium flow channel 10 toward the battery cell 300 .

[0050] Then, in the daily operation of the battery pack 1000, the first one-way explosion structure 51 remains in a closed state to prevent leakage of the cooling medium.

[0051] Once thermal runaway occurs in the battery pack 1000, when the temperature of the battery pack 1000 rises sharply and reaches a preset safety threshold, the first one-way explosion structure 51 can break open. At this time, the refrigerant in the cooling medium flow channel 10 can quickly flow into the battery pack 1000 and directly contact the high-temperature battery cell 300 to perform efficient heat exchange, thereby reducing the temperature of the battery cell 300 and delaying or preventing the further development of thermal runaway.

[0052] like Figure 1 and Figure 3 As shown, the second one-way explosion structure 52 is disposed corresponding to the exhaust passage 30 and is directed from the battery cell 300 toward the exhaust passage 30 .

[0053] In a normal state, the second one-way explosion structure 52 remains sealed to prevent external air, moisture, etc. from entering the battery pack 1000 .

[0054] When the battery pack 1000 experiences thermal runaway and the battery cell 300 generates a large amount of high-temperature and high-pressure gas due to internal short circuit, overheating, etc., the second one-way explosion structure 52 will break open when the set pressure or temperature threshold is reached. This arrangement allows the high-temperature and high-pressure gas to be quickly and orderly discharged from the battery pack 1000 into the exhaust channel 30, thereby effectively alleviating the high-pressure environment inside the battery pack 1000 and avoiding the risk of explosion caused by continuous pressure accumulation.

[0055] Here, the first unidirectional blasting structure 51 and the second unidirectional blasting structure 52 may be the same structure or different structures.

[0056] In some technical solutions, the one-way bursting structure 50 is formed by locally thinning the cold plate 100. Specifically, the position, shape and size of the one-way bursting structure 50 can be pre-designed on the cold plate 100, and the material layer at these positions is thinned during the production process. This method can ensure that the one-way bursting structure 50 remains consistent during subsequent production and assembly processes, thereby improving the overall safety performance of the battery pack 1000. Alternatively, the thickness of the material layer at a preset position of the cold plate 100 can be thinned to a critical value by mechanical processing, laser cutting or chemical etching. When the internal pressure or temperature of the battery pack 1000 reaches a preset safety threshold, these thinned areas will automatically rupture due to inability to withstand external pressure, thereby achieving the function of one-way bursting.

[0057] Of course, the present invention is not limited to this. In some other technical solutions, the unidirectional bursting structure 50 can be a diaphragm-type bursting structure. This diaphragm-type bursting structure is usually made of a thin and strong material, such as a metal film. The entire manufacturing process first processes the cold plate 100 into shape, and then further processes the accurate shape of the diaphragm-type bursting structure on this basis, and finally the processed diaphragm-type bursting structure is installed at a predetermined position of the cold plate 100. By setting up a diaphragm-type bursting structure, when the internal pressure of the battery pack 1000 rises to a certain level, the diaphragm will not be able to withstand the pressure and will rupture, thereby releasing the internal pressure.

[0058] Furthermore, the pressure thresholds set for the first unidirectional blasting structure 51 and the second unidirectional blasting structure 52 can be the same to achieve a unified pressure release standard. Of course, they can also be different to meet the safety requirements of different areas or different situations. For example, the pressure threshold of the unidirectional blasting structure 50 set in some areas that are predicted to be likely to face the accumulation of high-temperature gas can be lower to increase the response speed of the unidirectional blasting structure 50. The setting of these pressure thresholds can be adjusted according to the actual application scenario, and the present application does not make specific restrictions on the setting of the pressure thresholds of the first unidirectional blasting structure 51 and the second unidirectional blasting structure 52.

[0059] In some embodiments, the cold plate 100 includes at least two one-way bursting structures 50. The one-way bursting structure 50 includes a first one-way bursting structure 51 and a second one-way bursting structure 52.

[0060] Specifically, when the battery pack 1000 is in thermal runaway due to some reasons, its internal pressure rises sharply, and when it reaches the preset first threshold, the first one-way explosion structure 51 will explode quickly and reliably. This action immediately opens a channel to the exhaust channel 30, allowing the high-pressure gas in the battery pack 1000 to be quickly discharged, thereby effectively reducing the pressure inside the battery pack 1000 and preventing the battery pack 1000 from being damaged or even exploded due to excessive pressure.

[0061] At this time, the second one-way explosion structure 52 can explode almost simultaneously with the first one-way explosion structure 51 , so that the refrigerant in the cooling medium flow channel 10 enters the battery pack 1000 at the first time to cool the battery pack 1000 .

[0062] According to some optional embodiments of the present invention, an exhaust port 40 communicating with the exhaust channel 30 is disposed on the cold plate 100 , and the exhaust port 40 is used to be arranged toward the outside of the battery pack 1000 .

[0063] The exhaust port 40 is provided on the cold plate 100 and is closely connected to the internal exhaust channel 30. The exhaust port 40 and the exhaust channel 30 work together to form an efficient heat dissipation system. When the battery pack 1000 faces a high temperature and high pressure crisis, they can quickly and effectively guide excess heat and gas to the outside through the exhaust channel 30.

[0064] The exhaust port 40 is intentionally arranged toward the outside of the battery pack 1000 to ensure that heat and gas can be discharged directly during the exhaust process to avoid accumulation inside the battery pack 1000 or damage to other components. At the same time, this design also helps to reduce the potential impact of heat and gas on the environment around the battery pack 1000 during the exhaust process.

[0065] Alternatively, if Figure 2 As shown, the one-way explosion structure 50 further includes: a third one-way explosion structure 53 . The third one-way explosion structure 53 is disposed at the exhaust port 40 and faces the outside of the battery pack 1000 from the exhaust channel 30 .

[0066] Here, a more sophisticated and reliable safety control mechanism is achieved by introducing the third one-way explosion structure 53. The third one-way explosion structure 53 has similar characteristics to the second one-way explosion structure 52, that is, it can achieve explosion under high temperature and high pressure environment, but maintains a closed state under normal circumstances to prevent unexpected leakage of gas or liquid.

[0067] When thermal runaway occurs inside the battery pack 1000 and the temperature and pressure rise sharply, the second one-way explosion structure 52 will be triggered to explode first, allowing high-temperature and high-pressure gas to quickly enter the exhaust channel 30. This step effectively relieves the pressure inside the battery pack 1000 and reduces the risk of further deterioration of thermal runaway.

[0068] Subsequently, if the exhaust channel 30 and the related heat dissipation system or external intervention can effectively handle the high-temperature and high-pressure gas, so that the pressure inside the battery pack 1000 gradually decreases and stabilizes within a safe range, the third one-way explosion structure 53 will remain closed. This arrangement ensures that after the battery pack 1000 returns to normal, it will not cause damage to the surrounding environment or other components due to accidental gas leakage.

[0069] However, if the second one-way explosion structure 52 has exploded, but the pressure inside the battery pack 1000 continues to rise and exceeds the tolerance limit of the third one-way explosion structure 53, the third one-way explosion structure 53 will also explode, allowing the remaining high-temperature and high-pressure gas to be completely discharged. This step ensures that even in extreme cases, the battery pack 1000 can safely release the internal pressure and prevent more serious safety accidents.

[0070] Therefore, by introducing the third one-way explosion structure 53 , the exhaust channel 30 on the cold plate 100 can achieve more sophisticated and reliable safety control, and also provide more flexible safety protection for the battery pack 1000 .

[0071] In some Figure 5 In the illustrated embodiment, the cold plate 100 of the battery pack further includes a sensor 70 , which is disposed at the exhaust port 40 to detect the pressure and / or temperature of the gas.

[0072] When thermal runaway occurs in the battery pack 1000, the high-temperature and high-pressure gas generated will pass through the sensor 70 of the exhaust port 40. At this time, the sensor 70 will capture the pressure and / or temperature information of the gas, and immediately convert the information into electrical signals to feed back to the air conditioning system. After receiving the signals, the air conditioning system will immediately respond by increasing the filling pressure of the refrigerant to enhance the cooling effect.

[0073] As the refrigerant filling pressure increases, low-temperature and non-flammable liquid refrigerant is injected into the cooling medium flow channel 10. Under strong pressure, these liquid refrigerants can break through the first one-way explosion structure 51 in the exhaust channel 30 and smoothly enter the battery pack 1000. Once entering the battery pack 1000, these low-temperature liquid refrigerants will quickly undergo a phase change from liquid to gas. In this process, they will absorb and take away a large amount of heat inside the battery pack 1000, thereby effectively reducing the temperature of the battery pack 1000.

[0074] The gaseous refrigerant after phase change has strong diffusion and flow capabilities inside the battery pack 1000. It can quickly fill the entire battery pack 1000 space, further curbing the spread and development of thermal runaway. This principle of utilizing the phase change of low-temperature liquid refrigerant to absorb heat not only improves the cooling efficiency of the battery pack 1000, but also greatly enhances its thermal runaway prevention and control capabilities.

[0075] Optionally, see Figure 2 and Figure 3 , the exhaust channel 30 is arranged along the edge of the cold plate 100 .

[0076] This arrangement enables the exhaust channel 30 to fully utilize the space at the edge of the cold plate 100 without occupying the main area for the flow of the cooling medium inside the cold plate 100. The advantage of this is that it ensures that the cooling medium can flow smoothly inside the cold plate 100 and fully exchange heat with the battery cells, thereby effectively taking away the heat generated by the battery.

[0077] In addition, such a configuration also helps to improve the overall structural strength and stability of the battery pack 1000. By arranging the exhaust channel 30 at the edge of the cold plate 100, damage and interference to the internal structure of the cold plate 100 can be reduced, so that the cold plate 100 can better support and protect the battery cells.

[0078] According to some embodiments of the cold plate 100, see Figure 2 and Figure 4 There are multiple first one-way explosion structures 51, which are arranged at intervals along the length direction of the exhaust passage 30.

[0079] It should be noted that during the charging and discharging process of the battery pack 1000 , due to the difference in heat conduction between the battery cells 300 , uneven current distribution and the influence of the external environment, local high temperatures are often generated in certain areas.

[0080] In the above technical solution, multiple first one-way bursting structures 51 can be arranged along the length direction of the exhaust passage 30, which means that multiple first one-way bursting structures 51 can be evenly or unevenly arranged at different positions of the exhaust passage 30 according to actual needs. For example, the number of first one-way bursting structures 51 can be increased in a targeted manner in the predicted high-temperature hot area. The advantage of this is that when high-temperature and high-pressure gas appears in these areas, multiple first one-way bursting structures 51 can respond more quickly, share the exhaust pressure together, and ensure that heat and gas can be discharged faster and more evenly.

[0081] In some optional embodiments, such as Figure 3 As shown, the exhaust channel 30 includes: a first channel section 31, a second channel section 32, a third channel section 33 and a fourth channel section 34 connected in sequence, and the fourth channel section 34 is connected to the first channel section 31. The exhaust port 40 is provided on the first channel section 31, and the second channel section 32, the third channel section 33 and the fourth channel section 34 are all provided with a first one-way explosion structure 51.

[0082] The purpose of the exhaust channel 30 is to ensure that the battery pack 1000 can quickly and safely release the high-pressure and high-temperature gas accumulated inside the battery pack 1000 under abnormal conditions. Therefore, the existence of the exhaust channel 30 provides a safe gas release channel for the battery pack 1000.

[0083] The exhaust channel 30 includes a plurality of channel sections that are interconnected to form a smooth exhaust path. In this system, an exhaust port 40 is provided on the first channel section 31 for exhausting the gas. Then, the second channel section 32, the third channel section 33 and the fourth channel section 34 are sequentially connected to the first channel section 31 to ensure the continuous flow of the gas.

[0084] When any of the first one-way explosion structures 51 on the second channel segment 32 , the third channel segment 33 and the fourth channel segment 34 explodes, the gas can pass through these connected channel paths and eventually reach and be discharged from the exhaust port 40 on the first channel segment 31 .

[0085] like Figure 2 and Figure 4 As shown, according to some embodiments, the cold plate 100 has a medium inlet 61 and a medium outlet 62 connected to the cooling medium flow channel 10 .

[0086] Here, the medium inlet 61 and the medium outlet 62 serve as passages for the cooling medium to enter and leave the cold plate 100 , respectively.

[0087] Combination Figure 4 The cooling medium flow channel 10 includes: a plurality of first flow channels 11 and a plurality of second flow channels 12. One end of the plurality of first flow channels 11 is connected to the medium inlet 61.

[0088] One end of the plurality of first flow channels 11 is commonly connected to the medium inlet 61, which means that all cooling medium entering the cold plate 100 will first enter these first flow channels 11. The first flow channels 11 can be constructed as relatively long paths to increase the contact time between the cooling medium and the internal heat source of the cold plate 100, thereby improving the heat exchange efficiency.

[0089] Similar to the first flow channel 11 , one end of the plurality of second flow channels 12 is also commonly connected to the medium outlet 62 , which is a passage for the cooling medium to leave the cold plate 100 .

[0090] The other end of each second flow channel 12 is connected to at least one first flow channel 11 , and this arrangement allows the cooling medium to flow between the first flow channel 11 and the second flow channel 12 to form a cooling network structure.

[0091] The other end of each first flow channel 11 is also connected to at least one second flow channel 12. This interconnection ensures that the cooling medium can circulate throughout the cold plate 100, thereby effectively absorbing and taking away heat.

[0092] Combination Figure 2 and Figure 3 There are multiple second one-way bursting structures 52 , which are arranged at intervals on the cooling medium flow channel 10 .

[0093] Under normal circumstances, the second one-way burst structure 52 is closed, thus allowing the cooling medium to flow along the cooling medium flow channel 10. When in thermal runaway, the second one-way burst structure is opened, thereby allowing the cooling medium to enter the battery pack 1000 through the cooling medium flow channel 10 for cooling, thereby ensuring the safety of the battery pack 1000.

[0094] In some optional embodiments, such as Figure 2 and Figure 4 As shown, the medium inlet 61 and the medium outlet 62 are located on the same side of the cold plate 100 .

[0095] The cooling medium flow channel 10 includes a first connecting channel 14 , a second connecting channel 15 and a third connecting channel 16 .

[0096] The first connecting channel 14 serves as the inlet channel of the cooling medium, one end of which is directly connected to the medium inlet 61, and the other end is forked and connected to at least two first flow channels 11. Such a design not only increases the number of channels for the cooling medium to enter the battery pack 1000, but also enables the cooling medium to be more evenly distributed in the cold plate 100, thereby improving the efficiency of heat exchange. When the cooling medium enters the first flow channel 11 through the first connecting channel 14, it begins to exchange heat with the battery cells or modules in the battery pack 1000, effectively reducing the battery temperature.

[0097] The second connecting channel 15 serves as an outlet for the cooling medium. Similar to the first connecting channel 14, one end of the second connecting channel 15 is connected to the medium outlet 62, and the other end is also forked, connecting at least two second channels 12. These second channels 12 serve as the main channels for the cooling medium to leave the battery pack 1000. By providing the second connecting channel 15, the cooling medium is evenly distributed on the cold plate 100, thereby achieving efficient heat exchange. After the cooling medium completes the heat exchange task, they will be gathered into the second connecting channel 15 through the second channel 12, and finally discharged from the medium outlet 62.

[0098] The third connecting channel 16 is located on the side of the cold plate 100 away from the medium inlet 61. One end of the third connecting channel 16 is connected to the first channel 11 and the other end is connected to the second channel 12, forming a bridge connecting the two main cooling channels. This design not only increases the flow path of the cooling medium, but also enables the cooling medium to be exchanged and mixed between different channels, further improving the uniformity and efficiency of heat exchange. At the same time, the presence of the third connecting channel 16 also provides more adjustment space for the heat distribution inside the battery pack 1000, which helps to disperse and release heat more effectively in an emergency.

[0099] A second one-way bursting structure 52 is provided on each connection channel. These second one-way bursting structures 52 remain closed under normal circumstances to ensure that the cooling medium can flow along a predetermined path. However, in emergency situations such as thermal runaway of the battery pack 1000, these second one-way bursting structures 52 will respond quickly and open, allowing the cooling medium to enter the battery pack 1000 more directly for emergency cooling, while releasing the high-temperature and high-pressure gas and steam accumulated in the battery pack 1000, effectively ensuring the safe and stable operation of the battery system.

[0100] In some optional embodiments, such as Figure 4 As shown, there are two medium outlets 62 located on both sides of the medium inlet 61. There are two second connecting channels 15 located on both sides of the first connecting channel 14. The exhaust channel 30 is annular and is arranged around the outside of the cooling medium flow channel 10.

[0101] In this embodiment, there is a single medium inlet 61 for introducing cooling medium to perform heat exchange on the battery pack 1000 .

[0102] The medium outlet 62 effectively discharges the cooling medium after heat exchange. In this embodiment, two medium outlets 62 are provided, and the two medium outlets 62 are respectively located on both sides of the medium inlet 61. This arrangement helps to ensure that the cooling medium flows out through the two medium outlets 62 in a balanced manner after sufficient heat exchange on the cold plate 100, thereby avoiding problems such as local overheating or uneven cooling.

[0103] Optionally, the at least one unidirectional bursting structure 50 includes: a thinned hole 54 formed on the cold plate 100 .

[0104] See also Figure 6 This is a one-way bursting structure 50 disposed on the cooling medium flow channel 10 , which includes a thinning hole 54 formed on the cold plate 100 .

[0105] The thinning holes 54 refer to weak areas formed by reducing the material thickness in the cold plate 100. These areas remain closed under normal working conditions, but will automatically rupture when the internal pressure or temperature of the battery pack 1000 reaches a preset safety threshold.

[0106] Alternatively, if Figure 7 As shown, at least one unidirectional bursting structure 50 includes a plurality of thinned holes 54 , and the plurality of thinned holes 54 are arranged at intervals along the circumferential direction.

[0107] In the above technical solution, by setting a plurality of thinning holes 54 in a one-way blasting structure 50 and arranging these holes at intervals along the circumferential direction, the area between the thinning holes 54 still maintains a normal thickness. Although the thinning holes 54 themselves are weak points, the materials around them remain intact, thereby forming a relatively strong frame. This arrangement enables the one-way blasting structure 50 to have a strong structural strength in a non-blasting state, because the material layer between the thinning holes 54 can effectively disperse and withstand external pressure and mechanical stress.

[0108] When the internal pressure or temperature of the battery pack 1000 exceeds a set threshold, the plurality of thinning holes 54 may be ruptured simultaneously or sequentially to form a plurality of pressure relief points. This multi-point pressure relief method helps to release the internal pressure more evenly.

[0109] Optionally, at least one thinning hole 54 in a one-way bursting structure 50 is thinner than other surrounding thinning holes 54. The advantage of this is that, in some cases, these thinner thinning holes 54 may be broken first, thereby guiding the pressure to flow to other nearby unbroken thinning holes 54, and finally achieving comprehensive pressure release, thereby improving the response speed and reliability of the one-way bursting structure 50.

[0110] In some optional embodiments, referring to Figure 7 A reinforcing rib 90 is provided on the cold plate 100 corresponding to the one-way explosion structure 50 , and the reinforcing rib 90 is located on a side of the cold plate 100 away from the battery cell 300 .

[0111] The reinforcing ribs 90 can increase the rigidity and bending resistance of the cold plate 100, especially around the unidirectional burst structure 50. Providing the reinforcing ribs 90 in these areas can effectively prevent the cold plate 100 from deformation or unexpected rupture.

[0112] In addition, the reinforcing ribs 90 can evenly distribute the force applied to the cold plate 100 to a larger area, reducing local stress concentration, which not only improves the overall strength of the cold plate 100, but also extends its service life.

[0113] When the one-way bursting structure 50 does need to rupture, the presence of the reinforcing ribs 90 can help control the direction and speed of the rupture, making the rupture process more stable and controllable, thereby helping to avoid the expansion of irregular cracks and ensuring the smooth opening of the pressure relief channel.

[0114] See also Figure 1 According to an embodiment of the second aspect of the present invention, a battery pack 1000 comprises: a box body 200, a battery cell 300 and a cold plate 100. A receiving cavity 201 is provided in the box body 200. The battery cell 300 is disposed in the receiving cavity 201. The cold plate 100 is the cold plate 100 of the embodiment of the first aspect of the present invention, and the cold plate 100 is disposed on the box body 200, and the one-way explosion structure 50 is disposed toward the receiving cavity 201.

[0115] In this technical solution, the box body 200 serves as the outer shell of the battery pack 1000 and plays a role in protecting the internal battery cells 300 and related components. It not only provides physical protection, but also ensures the sealing and stability of the battery pack 1000.

[0116] The housing 200 is provided with a receiving cavity 201 for accommodating the battery cell 300 and other necessary components. The housing 200 includes a top cover, and the cold plate 100 can be mounted on the top cover. In some embodiments, the cold plate 100 and the top cover can be integrally formed, further enhancing the integrity and sealing of the structure.

[0117] The battery cell 300 is disposed in the accommodating cavity 201 of the box body 200. The battery cell 300 generates heat during the charging and discharging process, so an effective thermal management system is required to maintain a suitable operating temperature and prevent safety problems caused by overheating.

[0118] The cold plate 100 adopts the structure of the embodiment of the first aspect of the present invention, and is provided with a cooling medium flow channel 10 and an exhaust channel 30, as well as a plurality of one-way explosion structures 50. These structures work together to ensure the safety and reliability of the battery pack 1000 in normal operation and emergency situations.

[0119] Here, the cold plate 100 is disposed on the box body 200, and the one-way explosion structure 50 is disposed toward the accommodating cavity 201, which means that in the case of thermal runaway, they can respond to environmental changes around the battery cell 300 and take rapid measures to ensure safety.

[0120] In some optional embodiments, the box body 200 includes a top cover, and the cold plate 100 is disposed on the top cover. Such an arrangement enables the cold plate 100 to not only be in close contact with or close to the battery cell 300 to achieve efficient heat exchange, but also in the case of thermal runaway, the one-way explosion structure 50 can directly act on the battery cell 300 to quickly release pressure or introduce cooling medium to ensure the safety of users.

[0121] Optionally, the cold plate 100 is integrally formed with the top cover. This means that there are no obvious seams or connection points between the cold plate 100 and the top cover, thereby forming a complete structure. This not only improves the overall sealing, but also reduces the potential risk of leakage caused by the connection parts. Secondly, the one-piece molding setting enables the cold plate 100 and the top cover to jointly withstand external pressure and mechanical stress, thereby enhancing the structural rigidity of the entire battery pack 1000. Especially in the event of thermal runaway, this design can better resist the impact of internal high-pressure gas and ensure stability.

[0122] In addition, during the manufacturing process, an integral mold can be used to simultaneously mold the cold plate 100 and the top cover, thereby reducing assembly steps and improving production efficiency.

[0123] Reference below Figure 1 - Figure 7 The cold plate 100 according to the embodiment of the present invention is described in detail with a specific embodiment. It is worth noting that the following description is only an exemplary description and is not a specific limitation of the present invention.

[0124] Reference Figure 1 , Figure 2 , Figure 5 and Figure 7 The cold plate 100 is provided with: a cooling medium flow channel 10 , an exhaust channel 30 , an exhaust port 40 , a sensor 70 , a medium inlet 61 , a medium outlet 62 and a reinforcing rib 90 .

[0125] Reference Figure 3 The exhaust passage 30 is annular and is arranged around the outer side of the cooling medium flow channel 10 .

[0126] The exhaust channel 30 includes: a first channel section 31 , a second channel section 32 , a third channel section 33 and a fourth channel section 34 which are connected in sequence. The fourth channel section 34 is connected to the first channel section 31 .

[0127] The cooling medium flow channel 10 and the exhaust channel 30 are spaced apart on the cold plate 100 .

[0128] Reference Figure 4 The cooling medium flow channel 10 includes: a first flow channel 11, a second flow channel 12, a first connecting channel 14, a second connecting channel 15 and a third connecting channel 16.

[0129] The medium inlet 61 and the medium outlet 62 are located on the same side of the cold plate 100. There are two medium outlets 62 and they are located on both sides of the medium inlet 61.

[0130] One end of the first connecting channel 14 is connected to the medium inlet 61 , and the other end of the first connecting channel 14 is forked to connect at least two first flow channels 11 .

[0131] One end of the second connecting channel 15 is connected to the medium outlet 62, and the other end of the second connecting channel 15 is forked to connect at least two second flow channels 12. There are two second connecting channels 15 and they are located on both sides of the first connecting channel 14.

[0132] One end of the third connecting channel 16 is connected to the first flow channel 11 , and the other end is connected to the second flow channel 12 . The third connecting channel is located on a side of the cold plate 100 away from the medium inlet 61 .

[0133] The second one-way explosion structure 52 is respectively arranged on the first connecting channel 14 , the second connecting channel 15 , and the third connecting channel 16 .

[0134] The cold plate 100 is provided with a first one-way bursting structure 51 , a second one-way bursting structure 52 and a third one-way bursting structure 53 .

[0135] The first one-way bursting structure 51 is disposed corresponding to the cooling medium flow channel 10 and extends from the cooling medium flow channel 10 toward the battery cell 300 . There are a plurality of first one-way bursting structures 51 , which are arranged at intervals along the length direction of the exhaust channel 30 .

[0136] The second channel section 32 , the third channel section 33 and the fourth channel section 34 are all provided with a first one-way explosion structure 51 .

[0137] The second one-way explosion structure 52 is disposed corresponding to the exhaust channel 30 and extends from the battery cell 300 toward the exhaust channel 30. There are a plurality of second one-way explosion structures 52, which are arranged at intervals on the cooling medium flow channel 10.

[0138] The exhaust port 40 is connected to the exhaust channel 30, and the exhaust port 40 is used to be arranged toward the outside of the battery pack 1000. The exhaust port 40 is arranged on the first channel section 31

[0139] The third one-way explosion structure 53 is disposed at the exhaust port 40 and extends from the exhaust passage 30 toward the outside of the battery pack 1000 .

[0140] Reference Figure 6 The first unidirectional blasting structure 51 and the second unidirectional blasting structure 52 have the same structure, and both include: a plurality of thinning holes 54 arranged along the circumferential direction, and the plurality of thinning holes 54 are arranged at intervals along the circumferential direction.

[0141] Reference Figure 7 The reinforcing rib 90 is arranged corresponding to the one-way blasting structure 50 .

[0142] Reference Figure 5 , the sensor 70 is disposed at the exhaust port 40 to detect the pressure and temperature of the gas.

[0143] Other components of the cold plate 100 according to the embodiment of the present invention, such as the battery pack 1000 and the like, and operations thereof are known to those skilled in the art and will not be described in detail herein.

[0144] In the description of this specification, the description with reference to the terms "embodiment", "example", etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0145] Although the embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.

Claims

1. A cold plate of a battery pack, characterized in that: The cold plate is provided with cooling medium flow channels and exhaust channels spaced apart from each other, and the cold plate is provided with at least two one-way explosion structures; The one-way blasting structure comprises: A first one-way explosion structure is arranged corresponding to the cooling medium flow channel and extends from the cooling medium flow channel toward the battery core; A second one-way explosion structure is arranged corresponding to the exhaust passage and extends from the battery core toward the exhaust passage.

2. The cold plate of the battery pack according to claim 1, characterized in that: The cold plate is provided with an exhaust port connected to the exhaust channel, and the exhaust port is used to be arranged toward the outside of the battery pack.

3. The cold plate of the battery pack according to claim 2, characterized in that: The one-way blasting structure also includes: A third one-way explosion structure is provided at the exhaust port and extends from the exhaust passage toward the outside of the battery pack.

4. The cold plate of the battery pack according to claim 2, characterized in that: Also includes: A sensor is provided at the exhaust port to detect the pressure and / or temperature of the gas.

5. The cold plate of the battery pack according to claim 1, characterized in that: The exhaust channel is disposed along an edge of the cold plate.

6. The cold plate of the battery pack according to claim 1, characterized in that: There are a plurality of the first one-way explosion structures, which are arranged at intervals along the length direction of the exhaust passage.

7. The cold plate of the battery pack according to claim 2, characterized in that: The exhaust channel comprises: a first channel section, a second channel section, a third channel section and a fourth channel section connected in sequence, wherein the fourth channel section is connected to the first channel section; The exhaust port is arranged on the first channel section, and the first one-way explosion structure is arranged on the second channel section, the third channel section and the fourth channel section.

8. The cold plate of the battery pack according to claim 1, characterized in that: The cold plate has a medium inlet and a medium outlet connected to the cooling medium flow channel; The cooling medium flow channel comprises: A plurality of first flow channels, one end of each of the plurality of first flow channels being connected to the medium inlet; A plurality of second flow channels, one end of each of the plurality of second flow channels being connected to the medium outlet; The other end of each of the second flow channels is connected to at least one of the first flow channels, and the other end of each of the first flow channels is connected to at least one of the second flow channels; There are a plurality of the second one-way explosion structures, which are arranged at intervals on the cooling medium flow channel.

9. The cold plate of the battery pack according to claim 8, characterized in that: The medium inlet and the medium outlet are located on the same side of the cold plate; The cooling medium flow channel comprises: a first connecting channel, one end of which is connected to the medium inlet, and the other end of which is forked to connect at least two of the first flow channels; a second connecting channel, one end of which is connected to the medium outlet, and the other end of which is forked to connect at least two of the second flow channels; a third connecting channel, one end of the third connecting channel being connected to the first flow channel, and the other end of the third connecting channel being connected to the second flow channel, and the third connecting channel being located on a side of the cold plate away from the medium inlet; The second unidirectional explosion structure is respectively arranged on the first connecting channel, the second connecting channel, and the third connecting channel.

10. The cold plate of the battery pack according to claim 9, characterized in that: There are two medium outlets located on both sides of the medium inlet; There are two second connecting channels located on both sides of the first connecting channel; The exhaust passage is annular and is arranged around the outside of the cooling medium flow channel.

11. The cold plate of the battery pack according to any one of claims 1 to 10, characterized in that: At least one of the one-way burst structures includes: a thinned hole formed on the cold plate.

12. The cold plate of the battery pack according to claim 11, characterized in that: At least one of the one-way blasting structures comprises a plurality of the thinning holes, and the plurality of the thinning holes are arranged at intervals along the circumferential direction.

13. The cold plate of the battery pack according to any one of claims 1 to 10, characterized in that: The cold plate is provided with a reinforcing rib corresponding to the one-way explosion structure, and the reinforcing rib is located on a side of the cold plate away from the battery cell.

14. A battery pack, characterized in that: include: A box body, wherein a containing cavity is provided in the box body; A battery cell, wherein the battery cell is arranged in the accommodating cavity; A cold plate, wherein the cold plate is a cold plate of a battery pack according to any one of claims 1 to 13, wherein the cold plate is arranged on the box body, and the one-way explosion structure is arranged toward the accommodating cavity.

15. The battery pack according to claim 14, characterized in that: The box body comprises a top cover, and the cold plate is arranged on the top cover.

16. The battery pack according to claim 15, characterized in that: The cold plate and the top cover are integrally formed.

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