Battery pack and electric device

Abstract

The utility model relates to a battery pack and a power utilization device, the battery pack comprises a battery pack shell, a battery monomer and a heat management component, and a shell cavity is formed in the battery pack shell; the heat management part is arranged in the shell cavity and divides the shell cavity into an electrical cavity and a collection cavity, and the heat management part is used for accommodating fluid to adjust the temperature of the battery monomers; the single battery is arranged in the electrical cavity and comprises a first pressure relief mechanism, and the collecting cavity is used for collecting emissions, released by the first pressure relief mechanism, of the single battery; wherein the battery pack shell is provided with a pressure relief area, emissions collected by the collecting cavity are discharged through the pressure relief area, the heat management component is connected to the battery pack shell, and the heat management component and the pressure relief area are arranged in a staggered mode. Emissions of the single batteries cannot be in contact with electrical parts in the electrical cavity, so that faults such as short circuit and sparking of the battery pack are avoided; the pressure relief area is arranged in the battery pack shell, so that the damage to the strength of the heat management component can be reduced, and the strength of the heat management component is improved.

Description

TECHNICAL FIELD

[0001] The present disclosure relates to the technical field of battery pack, in particular, to a battery pack and a power consumption device. BACKGROUND

[0002] In the related art, when the internal heat generation of the battery cell is too large during the use of the battery pack, the internal gas pressure rises rapidly, and the high-temperature gas and conductive polymer are sprayed out from the explosion-proof valve of the battery cell, which is easy to contact with other high-voltage connection parts in the battery pack, thereby causing short circuit, sparking and other faults. CONTENT OF THE UTILITY MODEL

[0003] In order to overcome the problems in the related art, the present disclosure provides a battery pack and a power consumption device to solve the technical problems in the related art.

[0004] According to the embodiments of the present disclosure, a battery pack is provided, which comprises a battery pack shell, a battery cell and a thermal management component, an inner part of the battery pack shell is formed with a shell cavity;

[0005] The thermal management component is arranged in the shell cavity and separates the shell cavity into an electrical cavity and a collection cavity, and the thermal management component is used to accommodate fluid to regulate the temperature of the battery cell;

[0006] The battery cell is arranged in the electrical cavity and comprises a first pressure relief mechanism, and the collection cavity is used to collect the emissions of the battery cell released by the first pressure relief mechanism;

[0007] The battery pack shell is provided with a pressure relief area, the emissions collected by the collection cavity are discharged through the pressure relief area, the thermal management component is connected to the battery pack shell, and the thermal management component is arranged staggered with the pressure relief area.

[0008] In some embodiments, the battery pack shell comprises a shell body, a bottom guard plate and a cover plate connected to the shell body;

[0009] The thermal management component is connected to the shell body, and the bottom guard plate and the cover plate are arranged opposite and spaced apart to separate the shell cavity;

[0010] The bottom guard plate is used to surround the collection cavity, the cover plate is used to surround the electrical cavity, and the pressure relief area is arranged in the shell body.

[0011] In some embodiments, the shell body comprises an inner shell plate and an outer shell plate connected to each other, and an emission channel is defined between the inner shell plate and the outer shell plate;

[0012] A first channel end of the emission channel is configured as the pressure relief area and is at least partially arranged in the inner shell plate, and the first channel end is close to the collection cavity.

[0013] The second channel end of the exhaust channel is provided on the outer shell plate and is used for communicating with the outside of the battery pack housing.

[0014] In some embodiments, the inner shell plate and the outer shell plate are at least partially spaced apart to form the discharge channel, and the first channel end is formed by enclosing the inner shell plate and the outer shell plate.

[0015] In some embodiments, at the first channel end, the heat management component is connected to a side of the inner shell facing away from the exhaust channel.

[0016] In some embodiments, the thermal management component and the inner shell are connected by step connection friction stir welding.

[0017] In some embodiments, the inner shell comprises a bottom plate, side plates, and a top plate connected in sequence, and the bottom plate and the top plate are both connected to the outer shell;

[0018] The top plate is connected to the cover plate, the bottom plate is connected to the bottom guard plate, and the side plate is connected to the thermal management component;

[0019] The pressure relief area is arranged on the bottom plate.

[0020] In some embodiments, the inner shell comprises a bottom plate, side plates, and a top plate connected in sequence, and the bottom plate and the top plate are both connected to the outer shell;

[0021] The inner shell further includes a first reinforcing plate and a second reinforcing plate connected to each other, wherein the first reinforcing plate is obliquely connected to the side wall of the side plate, and the second reinforcing plate is connected to the bottom end of the side plate and extends in the same direction as the bottom plate;

[0022] The heat management component is connected to an end portion of the second reinforcing plate away from the side plate.

[0023] In some embodiments, the exhaust passage includes a first passage and a second passage that are interconnected;

[0024] The first reinforcing plate, the second reinforcing plate and the side plate enclose the first channel, and the pressure relief area is provided on the second reinforcing plate;

[0025] The top plate, the side plates, the bottom plate and the outer shell plate enclose the second channel;

[0026] The side plate is formed with a channel opening communicating with the first channel and the second channel.

[0027] In some embodiments, the second reinforcing plate comprises a protruding portion and a reinforcing plate body, the protruding portion is arranged at one end of the reinforcing plate body away from the side plate, and the protruding portion protrudes from the reinforcing plate body;

[0028] The heat management component and the first reinforcing plate are both connected with the protruding portion.

[0029] In some embodiments, the second channel end of the discharge channel is configured as a channel outlet, and the battery pack further comprises a second pressure relief mechanism arranged at the channel outlet.

[0030] In some embodiments, the second pressure relief mechanism is arranged in plurality, and the second pressure relief mechanism is configured as a second explosion-proof valve, the sum of the cross sections of the inner cavities of the plurality of second explosion-proof valves is S1.

[0031] The pressure relief area is configured as a pressure relief hole, and the pressure relief hole is arranged in plurality, the sum of the areas of the plurality of pressure relief holes is S2.

[0032] The S2 is not less than the S1.

[0033] In some embodiments, the pressure relief area is configured as a pressure relief hole, the pressure relief hole is configured as a waist-shaped hole, and the aspect ratio of the waist-shaped hole is not less than 5.

[0034] According to the embodiments of the present disclosure, a power utilization device is also provided, and the power utilization device comprises the battery pack.

[0035] The technical solution provided by the embodiments of the present disclosure can have the following beneficial effects: when the battery monomer is in a thermal runaway state, the heat inside the battery monomer accumulates, the temperature rises, the internal gas pressure increases, the high-temperature gas and the conductive polymer, i.e., the discharge, in the battery monomer are sprayed out through the first pressure relief mechanism and enter the collection cavity, and then are discharged from the collection cavity through the pressure relief area of the battery pack shell, so as to achieve the effect of pressure relief and temperature reduction, and improve the safety of the battery pack.

[0036] In the whole pressure relief process, the discharge of the battery monomer does not come into contact with the electrical components in the electrical cavity, and is discharged through the "hidden" collection cavity at the lower part of the electrical cavity, so that the short circuit, sparking and other faults of the battery pack are effectively avoided; in addition, by arranging the pressure relief area on the battery pack shell instead of the heat management component, the discharge in the collection cavity is discharged, and at the same time, the damage to the strength of the heat management component is reduced, the strength of the heat management component is improved, and the service life is prolonged.

[0037] It should be understood that the foregoing general description and the following detailed description are only exemplary and explanatory, and cannot limit the present disclosure. BRIEF DESCRIPTION OF DRAWINGS

[0038] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present disclosure and, together with the description, serve to explain the principles of the present disclosure.

[0039] Figure 1 It is a schematic diagram of the exploded structure of a battery pack according to an embodiment of the present disclosure.

[0040] Figure 2 It is a schematic diagram of the cross-sectional structure of a battery pack according to an embodiment of the present disclosure.

[0041] Figure 3 yes Figure 2 A partial enlarged view of point D in the middle, wherein the line with an arrow in the figure indicates the pressure relief path.

[0042] Figure 4 This is a partial structural diagram of a battery pack according to an embodiment of the present disclosure, wherein the figure illustrates the shell body and thermal management components.

[0043] Figure 5 This is a partial structural diagram of a battery pack according to an embodiment of the present disclosure, wherein the figure illustrates a shell body, a thermal management component, and a plurality of battery cells. In addition, the shell body is illustrated in cross-section.

[0044] Figure 6 It is a partial structural diagram of a battery pack according to another embodiment of the present disclosure.

[0045] Description of Reference Numerals

[0046] 1. Battery pack housing; 10. Housing cavity; 101. Electrical cavity; 102. Collecting cavity; 11. Second channel end; 12. Housing body; 120. Discharge channel; 1201. First channel; 1202. Second channel; 121. First profile plate; 122. Second profile plate; 1210. Inner shell plate; 1211. Outer shell plate; 1212. Bottom plate; 1213. Side plate; 12130. Channel opening; 1214. Top plate; 1215. Reinforcement rib; 1216. First reinforcement plate; 1217. Second reinforcement plate; 1218. Protrusion; 1219. Reinforcement plate body; 13. Bottom guard plate; 14. Cover plate; 15. Pressure relief area;

[0047] 2. Battery cell; 20. First battery cell group; 201. First battery cell; 200. Battery assembly;

[0048] 3. Thermal management component; 30. Discharge port; 4. Second pressure relief mechanism; 5. Filling glue; 6. First sealing member; 7. Second sealing member;

[0049] A. First direction; B. Second direction; C. Third direction. DETAILED DESCRIPTION

[0050] Exemplary embodiments will be described in detail herein, with examples illustrated in the accompanying drawings. In the following description, when referring to the drawings, identical numerals in different figures represent identical or similar elements, unless otherwise indicated. The embodiments described in the following exemplary embodiments are not intended to represent all possible embodiments consistent with the present disclosure. Rather, they are merely examples of apparatus and methods consistent with certain aspects of the present disclosure, as detailed in the appended claims.

[0051] In the present disclosure, unless otherwise stated, the directional terms "first direction, second direction and third direction" refer to three intersecting directions. Specifically, the first direction, the second direction and the third direction may be perpendicular to each other. Figure 1 shown.

[0052] Directional words such as "inside" and "outside" refer to the inside and outside of a specific structural outline. Terms such as "first" and "second" are used only to distinguish one element from another and do not have order or importance. In addition, the term "multiple" in this application refers to more than two and includes two.

[0053] Reference Figures 1 to 6 As shown, the present disclosure provides a battery pack, which includes a battery pack shell 1, a battery cell 2 and a thermal management component 3. A shell cavity 10 is formed inside the battery pack shell 1; the thermal management component 3 is arranged in the shell cavity 10 and divides the shell cavity 10 into an electrical cavity 101 and a collection cavity 102, and the thermal management component 3 is used to contain a fluid to regulate the temperature of the battery cell 2; the battery cell 2 is arranged in the electrical cavity 101 and includes a first pressure relief mechanism, and the collection cavity 102 is used to collect emissions of the battery cell 2 released by the first pressure relief mechanism; wherein, the battery pack shell 1 is provided with a pressure relief area 15, and the emissions collected in the collection cavity 102 are discharged through the pressure relief area 15, the thermal management component 3 is connected to the battery pack shell 1, and the thermal management component 3 and the pressure relief area 15 are staggered.

[0054] In the above technical solution, when thermal runaway occurs in the battery cell 2, heat accumulates inside the battery cell 2, the temperature rises, and the internal air pressure increases. The high-temperature gas and conductive polymer inside the battery cell 2, that is, the emissions, are ejected through the first pressure relief mechanism and enter the collection chamber 102, and then discharged from the collection chamber 102 through the pressure relief area 15 of the battery pack shell 1, thereby achieving the effect of pressure relief and temperature reduction, thereby improving the safety of the battery pack.

[0055] Among them, during the entire pressure relief process, the emissions from the battery cell 2 will not come into contact with the electrical components in the electrical cavity 101, and will be discharged through the "hidden" collection cavity 102 at the bottom of the electrical cavity 101, effectively avoiding the occurrence of battery pack short circuit, sparking and other faults; in addition, by setting the pressure relief area 15 in the battery pack shell 1 instead of the thermal management component 3, it is convenient to discharge the emissions in the collection cavity 102, while also reducing the damage to the strength of the thermal management component 3, improving the strength of the thermal management component 3 and extending the service life; in addition, by staggering the thermal management component 3 and the pressure relief area 15, the emission path of the emissions can be effectively extended and the temperature of the emissions can be effectively reduced.

[0056] The above-mentioned “offset arrangement” means that the heat management component 3 and the pressure relief area 15 are not arranged relative to each other in position, but are spaced apart from each other.

[0057] The aforementioned first pressure relief mechanism may be an element or component that is activated when the battery cell 2 reaches a certain condition. For example, the first pressure relief mechanism may be an element or component that is activated to release internal pressure and / or internal substances when the internal pressure or temperature of the battery cell 2 reaches a predetermined threshold. The design of this threshold varies depending on design requirements.

[0058] For example, the first pressure relief mechanism may be in the form of an explosion-proof valve, an air valve, a pressure relief valve or a safety valve, and may specifically be a pressure-sensitive element, that is, when the internal pressure of the battery cell 2 reaches a predetermined threshold, the first pressure relief mechanism is actuated or a weak area provided in the first pressure relief mechanism ruptures, thereby forming an opening or channel for the internal pressure to be released.

[0059] Alternatively, the first pressure relief mechanism may be a temperature-sensitive element. Specifically, when the internal temperature of the battery cell 2 reaches a predetermined threshold, the first pressure relief mechanism activates, thereby forming an opening or channel for internal pressure relief. Alternatively, the pressure relief mechanism may be an actively actuated component. For example, the first pressure relief mechanism may be actuated upon receiving a control signal.

[0060] Secondly, the thermal management component 3 can also be referred to as a cooling component or cooling plate. Furthermore, the thermal management component 3 can also be used for heating, which is not limited in this embodiment of the present application. Optionally, the fluid within the thermal management component 3 can be circulated to achieve a better temperature regulation effect.

[0061] In addition, the pressure relief area 15 can be configured as a pressure relief hole, through which the emissions collected by the collection chamber 102 can be discharged. Alternatively, the pressure relief area 15 can be configured as a weak area, through which the emissions collected by the collection chamber 102 can be discharged after destroying the weak area.

[0062] For example, when the pressure relief area 15 is a pressure relief hole, the exhaust in the collecting chamber 102 can directly pass through the pressure relief hole and enter a specific exhaust path before being discharged to the outside of the battery pack housing 1 .

[0063] When the pressure relief area 15 is a weak area, the weak area can be obtained by thinning the battery pack shell 1, or using a material different from other areas on the battery pack shell 1 in the area where the weak area is located, such as a material with a lower melting point, so that when the temperature or pressure of the emissions in the collection chamber 102 reaches a certain threshold, it can break through the weak area and enter a specific emission path and be discharged to the outside of the battery pack shell 1.

[0064] Optionally, refer to Figure 1 and Figure 2 As shown, the battery pack shell 1 includes a shell body 12, a bottom guard plate 13 and a cover plate 14, the bottom guard plate 13 and the cover plate 14 are respectively connected to the two sides of the shell body 12 along the first direction A; the thermal management component 3 is connected to the shell body 12, and is opposite to and spaced from the bottom guard plate 13 and the cover plate 14 in the first direction A; the thermal management component 3, the shell body 12 and the cover plate 14 enclose an electrical cavity 101; the thermal management component 3, the shell body 12 and the bottom guard plate 13 enclose a collecting cavity 102; the pressure relief area 15 is arranged in the shell body 12 and / or the bottom guard plate 13.

[0065] In this embodiment, firstly, the shell body 12, the bottom guard plate 13 and the cover plate 14 constitute the basic structural frame of the battery pack, providing mechanical protection to prevent external impact or environmental factors from affecting the internal battery. Secondly, the thermal management component 3 can support and bear the battery cell 2, and can also maintain the battery cell 2 working within an ideal temperature range, extending the service life and improving safety. In addition, the thermal management component 3 can also separate the shell cavity 10 into an electrical cavity 101 and a collection cavity 102. When the battery cell 2 suffers from thermal runaway, the emissions can enter the collection cavity 102 and further be discharged from the collection cavity 102 to the outside, avoiding contact with the electrical components in the electrical cavity 101, thereby avoiding the occurrence of faults such as short circuits and sparks.

[0066] Among them, the specific implementation method for the collection chamber 102 to collect the emissions of the battery cell 2 released by the first pressure relief mechanism can be achieved by opening a discharge port 30 on the thermal management component 3, wherein the setting position of the discharge port 30 will not affect the normal use of the thermal management component 3, and takes into account the comprehensive design of the thermal management and emission discharge of the battery cell 2, thereby improving the overall performance and safety.

[0067] For example, the discharge port 30 can be arranged opposite to the first pressure relief mechanism of the battery cell 2 to ensure that the emissions from the battery cell 2 can be directly discharged into the collection chamber 102. For the discharge port 30 on the thermal management component 3, the specific shape and size can be adapted to the first pressure relief mechanism to ensure the sealing between the discharge port 30 and the first pressure relief mechanism, thereby preventing the erupted material from leaking into the electrical chamber 101.

[0068] In one embodiment, reference Figure 2 、 Figure 3 as well as Figure 6 As shown, the shell body 12 includes an inner shell plate 1210 and an outer shell plate 1211 connected to each other, and a discharge channel 120 is formed between the inner shell plate 1210 and the outer shell plate 1211; the first channel end of the discharge channel 120 is configured as the pressure relief area 15 and is at least partially arranged on the inner shell plate 1210; the first channel end is close to the collection chamber 102, and the second channel end 11 of the discharge channel 120 is arranged on the outer shell plate 1211 and is used to communicate with the outside of the battery pack shell 1.

[0069] In this embodiment, the design of the inner shell plate 1210 and the outer shell plate 1211 can effectively enhance the structural strength of the shell body 12, effectively protect the components inside the shell cavity 10, and the design of the inner shell plate 1210 and the outer shell plate 1211 can also achieve heat insulation and other effects.

[0070] Secondly, by providing a pressure relief area 15 on the inner housing plate 1210, the exhaust from the battery cells 2 into the collection chamber 102 is directed into the exhaust channel 120 and then discharged through the second channel end 11. The exhaust channel 120 is "hidden" within the housing body 12 and does not pose risks such as ignition or short circuits, thus providing a high safety factor.

[0071] Optionally, the inner shell 1210 and the outer shell 1211 are at least partially spaced apart to form the discharge channel 120, and the first channel end is formed by enclosing the inner shell 1210 and the outer shell 1211. For example, the first channel end is configured as a pressure relief hole, and the inner shell 1210 and the outer shell 1211 jointly enclose the pressure relief hole.

[0072] In addition, at the first channel end, the heat management component 3 is connected to a side of the inner shell 1210 facing away from the exhaust channel 120 .

[0073] The discharge channel 120 includes at least one first channel end and at least one second channel end 11. For example, there may be one first channel end and one second channel end 11, or there may be one first channel end and multiple second channel ends 11, or there may be multiple first channel ends and one second channel end 11, or there may be multiple first channel ends and multiple second channel ends 11; however, this disclosure does not limit this.

[0074] In an optional embodiment, the thermal management component 3 and the inner shell plate 1210 are connected by step connection friction stir welding (Step Connection Friction Stir Welding), which has high connection strength and small welding deformation. However, this disclosure does not limit the specific connection method between the thermal management component 3 and the inner shell plate 1210.

[0075] Reference Figure 6 As shown, the inner shell plate 1210 includes a bottom plate 1212, a side plate 1213 and a top plate 1214 connected in sequence, and the bottom plate 1212 and the top plate 1214 are both connected to the outer shell plate 1211; the top plate 1214 is connected to the cover plate 14, the bottom plate 1212 is connected to the bottom guard plate 13, and the side plate 1213 is connected to the thermal management component 3; the side plate 1213 is used to enclose the electrical cavity 101, the bottom plate 1212 is used to enclose the collection cavity 102, and the pressure relief area 15 is set on the bottom plate 1212.

[0076] In this embodiment, side panels 1213 enclose electrical chamber 101, while bottom panel 1212 encloses collection chamber 102. Pressure relief area 15 is provided with bottom panel 1212, ensuring unobstructed and smooth discharge of emissions. Both bottom panel 1212 and pressure relief area 15 are located within collection chamber 102, "hidden" beneath electrical chamber 101. Furthermore, discharge channel 120 is "hidden" within housing body 12, utilizing the internal space within housing body 12 for emission discharge. This eliminates the need for a separate channel for emission discharge, reducing costs.

[0077] In addition, the thermal management component 3 is connected to the side plate 1213, and does not need to be arranged opposite to the pressure relief area 15 in the first direction A, which effectively reduces the layout size of the thermal management component 3; in addition, there is no need to set a weak area or pressure relief hole on the thermal management component 3 opposite to the pressure relief area 15 in the first direction A, so as to ensure the overall structural strength of the thermal management component 3.

[0078] The inner shell plate 1210 can be configured in any suitable shape and structure, which is not limited in the present disclosure. For example, in other embodiments, the inner part of the shell body 12 is configured as a cavity, and the inner part of the cavity is provided with staggered reinforcing ribs 1215 to improve the overall strength of the shell body 12. In order to ensure the smooth discharge of the exhaust, the reinforcing ribs 1215 need to be designed with openings or grooves, etc. if they block the discharge of the exhaust.

[0079] In another embodiment, referring to Figure 2 and Figure 3 , the inner shell plate 1210 includes a bottom plate 1212, a side plate 1213 and a top plate 1214 connected in sequence, and the bottom plate 1212 and the top plate 1214 are connected with the outer shell plate 1211. The inner shell plate 1210 further includes a first reinforcing plate 1216 and a second reinforcing plate 1217 connected with each other, the first reinforcing plate 1216 is connected to the side wall of the side plate 1213 obliquely, and the second reinforcing plate 1217 is connected to the bottom end of the side plate 1213 and extends in the same direction as the bottom plate 1212. The thermal management component 3 is connected to the end of the second reinforcing plate 1217 away from the side plate 1213.

[0080] In this embodiment, the first reinforcing plate 1216 and the second reinforcing plate 1217 can effectively reinforce the shell body 12 and improve the strength of the shell body 12. In addition, the second reinforcing plate 1217 is connected to the bottom end of the side plate 1213 and extends in the same direction as the bottom plate 1212. The second reinforcing plate 1217 and the bottom plate 1212 are respectively arranged on both sides of the side plate 1213, and the second reinforcing plate 1217 can be regarded as a further extension of the bottom plate 1212, so as to be connected with the thermal management component 3 and improve the overall strength.

[0081] Optionally, referring to Figure 2 and Figure 3 , the exhaust passage 120 includes a first passage 1201 and a second passage 1202 connected with each other. The first reinforcing plate 1216, the second reinforcing plate 1217 and the side plate 1213 surround the first passage 1201, and the pressure relief area 15 is arranged on the second reinforcing plate 1217. The top plate 1214, the side plate 1213, the bottom plate 1212 and the outer shell plate 1211 surround the second passage 1202, and the side plate 1213 is formed with a passage opening 12130 connecting the first passage 1201 and the second passage 1202.

[0082] In this embodiment, the bottom plate 1212 can be integrally attached to the bottom guard plate 13 and not exposed to the collection cavity 102, while the second reinforcing plate 1217 can be exposed to the collection cavity 102, and by providing the pressure relief area 15 on the second reinforcing plate 1217, it is ensured that the exhaust in the collection cavity 102 can pass through the pressure relief area 15 to the first channel 1201 and the second channel 1202 in turn, and then be discharged to the outside of the battery pack shell 1. In addition, in order to ensure the effective communication of the first channel 1201 and the second channel 1202, a channel opening 12130 communicating the first channel 1201 and the second channel 1202 can be formed on the side plate 1213.

[0083] As shown in Figure 3 , the second reinforcing plate 1217 includes a protruding portion 1218 and a reinforcing plate body 1219, the protruding portion 1218 is provided at one end of the reinforcing plate body 1219 away from the side plate 1213, and the protruding portion 1218 protrudes from the reinforcing plate body 1219; wherein the thermal management component 3 and the first reinforcing plate 1216 are connected with the protruding portion 1218. By providing the protruding portion 1218, the connection part of the second reinforcing plate 1217, the thermal management component 3 and the first reinforcing plate 1216 is structurally reinforced, and the strength and stability of the connection are improved.

[0084] As shown in Figure 1 , the second channel end 11 of the exhaust channel 120 is configured as a channel outlet, and the battery pack further includes a second pressure relief mechanism 4 provided at the channel outlet. By providing the second pressure relief mechanism 4, the safety of the exhaust pressure relief is further improved, and the second pressure relief mechanism 4 can be configured as an explosion-proof valve, but the specific type of the second pressure relief mechanism 4 is not limited in the present disclosure, and the specific type can be consistent with the first pressure relief mechanism described above.

[0085] In one embodiment, the second pressure relief mechanism 4 is provided in multiple, and the second pressure relief mechanism 4 is configured as a second explosion-proof valve, the sum of the cross sections of the inner cavities of the multiple second explosion-proof valves is S1; the pressure relief area 15 is configured as a pressure relief hole, the pressure relief hole is provided in multiple, and the sum of the areas of the multiple pressure relief holes is S2; wherein S2 is not less than S1. It is ensured that the exhaust can be discharged to the second explosion-proof valve through the pressure relief hole in time and effectively when the battery monomer 2 is in thermal runaway, avoiding the accumulation of the exhaust.

[0086] In addition, the above-mentioned pressure relief area 15 can be configured as a pressure relief hole, which can be configured as a waist-shaped hole, and the aspect ratio of the waist-shaped hole is not less than 5. It is ensured that the exhaust can be smoothly discharged through the waist-shaped hole when the battery monomer 2 is in thermal runaway. However, the specific shape of the pressure relief hole and its specific size are not limited in the present disclosure.

[0087] As shown in Figure 4 and Figure 5As shown, a plurality of battery cells 2 are provided, each comprising at least one first battery cell group 20. The first battery cell group 20 includes a plurality of first battery cells 201 arranged along a second direction B on a thermal management component 3. The thermal management component 3 is provided with a plurality of exhaust ports 30 corresponding one to each of the first battery cells 201. The first direction A intersects the second direction B. The provision of multiple corresponding exhaust ports 30 on the thermal management component 3 facilitates pressure relief from the plurality of battery cells 2. However, this disclosure does not limit the number or arrangement of the battery cells 2. The arrangement of the exhaust ports 30 can be adapted to the first pressure relief mechanisms of the battery cells 2.

[0088] Optionally, refer to Figures 3 to 5 As shown, a plurality of first battery cell groups 20 are provided, and the plurality of first battery cell groups 20 are arranged in the third direction C; the shell body 12 includes two first profile plates 121 extending along the second direction B and opposite to and spaced apart along the third direction C; at least one first profile plate 121 includes an inner shell plate 1210 and an outer shell plate 1211 connected to each other to form a discharge channel 120, and the inner shell plate 1210 is provided with a plurality of pressure relief areas 15 spaced apart along the second direction B; the first direction A, the second direction B and the third direction C are intersected in pairs.

[0089] In this embodiment, by providing a discharge channel 120 within the first profile plate 121, when the material ejected from the battery cell 2 enters the collection chamber 102 through the discharge port 30, it flows along the third direction C and passes through the multiple pressure relief areas 15 into the discharge channel 120, and then is discharged from the battery pack through the second channel end 11. However, this disclosure does not limit the specific pressure relief path.

[0090] For example, the above-mentioned first battery cell groups 20 are set to two, and the two first battery cell groups 20 are arranged in the third direction C. The two first profile plates 121 of the shell body 12 are both provided with a discharge channel 120, which can be used to provide pressure relief and discharge for the two first battery cell groups 20 when thermal runaway occurs.

[0091] In other embodiments, referring to Figure 4 and Figure 5 As shown, the shell body 12 also includes two second profile plates 122 extending along the third direction C and arranged oppositely and spaced apart along the second direction B; the second profile plate 122 includes an inner shell plate 1210 and an outer shell plate 1211 connected to each other to form a discharge channel 120; wherein the discharge channel 120 in the first profile plate 121 is connected to the discharge channel 120 in the second profile plate 122.

[0092] That is, a discharge channel 120 may also be provided inside the second profile plate 122 of the shell body 12, and the discharge channel 120 in the second profile plate 122 is interconnected with the discharge channel 120 in the first profile plate 121. The pressure relief area 15 and the second channel end 11 may not be provided on the second profile plate 122, and the pressure relief area 15 and the second channel end 11 on the first profile plate 121 are used for the entry and discharge of emissions.

[0093] Alternatively, in other embodiments, the discharge channel 120 in the second profile plate 122 is not connected to the discharge channel 120 in the first profile plate 121, and a separate pressure relief area 15 and a second channel end 11 can be provided on the second profile plate 122, which is not limited in the present disclosure.

[0094] In other embodiments, referring to Figure 1 and Figure 2 As shown, the battery pack also includes adhesive glue and filling glue 5; the battery cells 2 are arranged in plurality, and the plurality of battery cells 2 are constructed into a battery assembly 200; the battery assembly 200 is bonded to the thermal management component 3 by adhesive glue, and the battery assembly 200 is spaced apart from the inner wall of the electrical cavity 101 to form a filling space, and the filling glue 5 is filled in the filling space.

[0095] In this embodiment, by filling the filling glue 5 into the filling space formed by the battery assembly 200 and the inner wall of the electrical cavity 101, it is ensured that the interior of the electrical cavity 101 is filled with the filling glue 5, further preventing the discharge of the battery cell 2 from entering the electrical cavity 101. In addition, the battery assembly 200 is bonded to the thermal management component 3 by adhesive glue, thereby ensuring that the first pressure relief mechanism of the battery cell 2 and the discharge port 30 on the thermal management component 3 are closely matched, effectively preventing the filling glue 5 from clogging the discharge port 30, and ensuring that normal pressure relief can be performed when thermal runaway occurs in the battery cell 2.

[0096] Optionally, the battery pack further includes a first seal 6 and a second seal 7 , wherein the first seal 6 is disposed between the shell body 12 and the bottom guard plate 13 , and the second seal 7 is disposed between the shell body 12 and the upper cover 14 .

[0097] In this embodiment, the provision of first and second seals 6 and 7 ensures that the battery pack can operate in harsh environments without being affected by external factors, extending the battery pack's service life and improving safety. Furthermore, good sealing prevents moisture or other conductive substances from entering the battery pack, thereby avoiding potential short circuits.

[0098] As for the specific types of the first sealing member 6 and the second sealing member 7 , a rubber O-ring, an elastic sealing strip or a foam sealing strip may be used. The present disclosure does not limit the specific types of the first sealing member 6 and the second sealing member 7 .

[0099] The present disclosure also provides an electric device, which includes the above-mentioned battery pack, wherein the electric device includes a vehicle, but the present disclosure does not limit the specific type of the electric device. For example, the electric device can also be a spacecraft or a ship.

[0100] Other embodiments of the present disclosure will readily occur to those skilled in the art after considering the specification and practicing the present disclosure. This application is intended to cover any variations, uses, or adaptations of the present disclosure that follow the general principles of the present disclosure and include common knowledge or customary techniques in the art not disclosed herein. The description and examples are to be considered as exemplary only, with the true scope and spirit of the present disclosure being indicated by the following claims.

[0101] It should be understood that the present disclosure is not limited to the exact structures that have been described above and shown in the drawings, and that various modifications and changes can be made without departing from the scope thereof. The scope of the present disclosure is limited only by the appended claims.

Claims

1. A battery pack, characterized in that: The battery pack includes a battery pack shell, a battery cell and a thermal management component, wherein a shell cavity is formed inside the battery pack shell; The thermal management component is disposed in the housing cavity and divides the housing cavity into an electrical cavity and a collection cavity, and the thermal management component is used to contain a fluid to regulate the temperature of the battery cell; The battery cell is disposed in the electrical cavity and includes a first pressure relief mechanism, and the collection cavity is used to collect emissions from the battery cell released by the first pressure relief mechanism; The battery pack shell is provided with a pressure relief area, the emissions collected by the collection chamber are discharged through the pressure relief area, the thermal management component is connected to the battery pack shell, and the thermal management component and the pressure relief area are staggered.

2. The battery pack according to claim 1, wherein: The battery pack shell includes a shell body, and a bottom guard plate and a cover plate connected thereto; The thermal management component is connected to the housing body, and the bottom guard plate and the cover plate are arranged opposite to each other and spaced apart to separate the housing cavity; The bottom guard plate is used to enclose the collecting cavity, the cover plate is used to enclose the electrical cavity, and the pressure relief area is arranged on the shell body.

3. The battery pack according to claim 2, wherein: The shell body includes an inner shell plate and an outer shell plate connected to each other, and a discharge channel is defined between the inner shell plate and the outer shell plate; The first channel end of the discharge channel is configured as the pressure relief area and is at least partially disposed on the inner shell, the first channel end being close to the collecting chamber; The second channel end of the exhaust channel is provided on the outer shell plate and is used for communicating with the outside of the battery pack housing.

4. The battery pack according to claim 3, wherein: The inner shell plate and the outer shell plate are at least partially spaced apart to form the discharge channel, and the first channel end is formed by enclosing the inner shell plate and the outer shell plate.

5. The battery pack according to claim 3, wherein: At the first channel end, the heat management component is connected to a side of the inner shell facing away from the exhaust channel.

6. The battery pack according to claim 5, characterized in that: The thermal management component and the inner shell plate are connected by step connection friction stir welding.

7. The battery pack according to claim 3, characterized in that: The inner shell comprises a bottom plate, side plates and a top plate connected in sequence, and the bottom plate and the top plate are both connected to the outer shell; The top plate is connected to the cover plate, the bottom plate is connected to the bottom guard plate, and the side plate is connected to the thermal management component; The pressure relief area is arranged on the bottom plate.

8. The battery pack according to claim 3, wherein: The inner shell comprises a bottom plate, side plates and a top plate connected in sequence, and the bottom plate and the top plate are both connected to the outer shell; The inner shell further includes a first reinforcing plate and a second reinforcing plate connected to each other, wherein the first reinforcing plate is obliquely connected to the side wall of the side plate, and the second reinforcing plate is connected to the bottom end of the side plate and extends in the same direction as the bottom plate; The heat management component is connected to an end portion of the second reinforcing plate away from the side plate.

9. The battery pack according to claim 8, characterized in that: The discharge channel includes a first channel and a second channel that are interconnected; The first reinforcing plate, the second reinforcing plate and the side plate enclose the first channel, and the pressure relief area is provided on the second reinforcing plate; The top plate, the side plates, the bottom plate and the outer shell plate enclose the second channel; The side plate is formed with a channel opening communicating with the first channel and the second channel.

10. The battery pack according to claim 8, wherein: The second reinforcing plate includes a protruding portion and a reinforcing plate body, wherein the protruding portion is provided at one end of the reinforcing plate body away from the side plate, and the protruding portion protrudes from the reinforcing plate body; Wherein, the thermal management component and the first reinforcing plate are both connected to the protruding portion.

11. The battery pack according to any one of claims 3 to 10, characterized in that: The second channel end of the exhaust channel is configured as a channel outlet. The battery pack further includes a second pressure relief mechanism disposed at the channel outlet.

12. The battery pack according to claim 11, wherein: The second pressure relief mechanism is provided in plurality, and the second pressure relief mechanism is configured as a second explosion-proof valve, and the sum of the cross-sections of the inner cavities of the plurality of second explosion-proof valves is S1; The pressure relief area is constructed as a pressure relief hole, and the pressure relief hole is provided in plurality, and the sum of the areas of the plurality of pressure relief holes is S2; Wherein, the S2 is not less than the S1.

13. The battery pack according to claim 1, wherein: The pressure relief area is configured as a pressure relief hole, and the pressure relief hole is configured as a waist-shaped hole, and the length-to-width ratio of the waist-shaped hole is not less than 5.

14. An electrical device, characterized in that: The electric device comprises the battery pack according to any one of claims 1 to 13, and the electric device comprises a vehicle.

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