Battery pack and battery device

Abstract

The utility model belongs to battery technical field discloses a kind of battery pack and battery device, battery pack includes box, first partition beam, second partition beam and multiple electric conductors, first partition beam separates the space in box into battery cabin and electrical cabin along second direction arrangement, second partition beam separates into multiple independent sealed sub battery cabin, each sub battery cabin is equipped with battery pack;Through portion is equipped on first partition beam, multiple electric conductors are sealed and arranged in through portion, each electric conductor is electrically connected with a battery pack, second partition beam is inserted into electrical cabin along the one end of second direction, and the length L of insertion electrical cabin is ≥10mm.The electric conductor in adjacent two sub battery cabins is located at the two sides of second partition beam along first direction.The battery pack can reduce the probability of thermal runaway in battery pack, reduce the mutual influence between adjacent battery packs, improve the working reliability of battery pack, and reduce the probability of battery pack fire.

Description

Technical Field

[0001] This utility model relates to the field of battery technology, and in particular to a battery pack and battery device. Background Technology

[0002] Existing battery packs typically include multiple battery groups, each containing multiple batteries. These battery groups can be connected in series or in parallel. The multiple battery groups are in the same environment. However, if a battery group experiences thermal runaway, there will be mutual interference between adjacent battery groups, causing both battery groups to malfunction. This can lead to the battery pack stopping working or even catching fire. Utility Model Content

[0003] This invention provides a battery pack and battery device that can reduce the probability of thermal runaway within the battery pack, reduce the mutual influence between adjacent battery packs, improve the working reliability of the battery pack, and reduce the probability of battery pack fire.

[0004] To achieve this objective, the present invention adopts the following technical solution:

[0005] A battery pack includes a housing, a first partition beam, and a second partition beam. The housing includes a base plate, and the first and second partition beams are placed on the base plate. The connection between the first and second partition beams is sealed. The first partition beam divides the space inside the housing into a battery compartment and an electrical compartment arranged along a second direction. The second partition beam divides the battery compartment into multiple independent and sealed sub-battery compartments. The multiple sub-battery compartments are arranged along a first direction. The first and second directions are parallel to the plane of the base plate and intersect. A battery pack is disposed in each sub-battery compartment. The first partition beam has a through portion that extends through the first partition beam along the second direction. Multiple conductive elements are sealed through the through portion and are arranged along the second direction. One end of each conductive element is electrically connected to the battery pack, and the other end extends at least partially into the electrical compartment. The second partition beam extends into the electrical compartment at one end along the second direction, and the length L extending into the electrical compartment satisfies the relationship: L≥10mm.

[0006] A battery device comprising the battery pack described above.

[0007] The beneficial effects of this invention are as follows: A first and second partition beam are installed inside the battery pack. The second partition beam divides the battery compartment into multiple independently sealed sub-battery compartments, ensuring that the battery packs within each sub-battery compartment are independently sealed. When one battery pack experiences thermal runaway, the impact on the battery packs in adjacent sub-battery compartments is relatively limited, thus reducing the probability of thermal runaway propagation. Simultaneously, one end of the second partition beam extends into the electrical compartment, and the length L of the second partition beam extending into the electrical compartment is controlled to be greater than or equal to 10mm. The portion of the second partition beam within the electrical compartment effectively prevents high-temperature fumes entering the battery compartment from entering adjacent sub-battery compartments, thereby reducing the impact of high-temperature fumes on other sub-battery compartments when a battery in one sub-battery compartment experiences thermal runaway, and improving the safety of the battery pack.

[0008] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0009] Figure 1 This is a schematic diagram of the structure of the first type of battery pack of this utility model;

[0010] Figure 2 This is a simplified structural diagram of the first type of battery pack of this utility model on the XOY plane;

[0011] Figure 3 This is a simplified structural diagram of the first type of battery pack of this utility model on the ZOY plane;

[0012] Figure 4 This is a simplified structural diagram of the first type of battery pack of this utility model on the XOZ plane;

[0013] Figure 5 This is a simplified structural diagram of the second type of battery pack of this utility model on the ZOY plane;

[0014] Figure 6 This is a simplified structural diagram of the third type of battery pack of this utility model on the XOY plane;

[0015] Figure 7 This is a simplified structural diagram of the third type of battery pack of this utility model on the ZOY plane;

[0016] Figure 8 This is a simplified structural diagram of the fourth type of battery pack of this utility model on the XOY plane;

[0017] Figure 9 This is a simplified structural diagram of the fifth type of battery pack of this utility model on the XOY plane;

[0018] Figure 10 This is a simplified structural diagram of the sixth type of battery pack in the ZOY plane of this utility model;

[0019] Figure 11 This is a simplified structural diagram of the seventh type of battery pack in the XOZ plane of this utility model.

[0020] Figure label:

[0021] 100, Housing; 110, Battery compartment; 111, Sub-battery compartment; 120, Electrical compartment; 121, Sub-electrical compartment; 200, First partition beam; 201, Through section; 202, Through hole; 300, Second partition beam; 310, First sub-partition beam; 320, Second sub-partition beam; 330, Through hole; 400, Battery pack; 500, Conductive component. Detailed Implementation

[0022] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present invention and not intended to limit it. Furthermore, it should be noted that, for ease of description, the accompanying drawings show only the parts relevant to the present invention, not the entire structure.

[0023] In the description of this utility model, unless otherwise explicitly specified and limited, the terms "connected," "linked," and "fixed" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0024] In the description of this embodiment, the terms "upper," "lower," "left," "right," "front," and "rear," etc., refer to the orientation or positional relationship shown in the accompanying drawings. They are used only for ease of description and simplification of operation, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. In addition, the terms "first" and "second" are only used for distinction in description and have no special meaning.

[0025] Research has shown that setting up multiple independently sealed battery compartments in a battery pack can effectively reduce the impact of thermal runaway on other batteries, ensuring their normal operation and improving the safety of the battery pack. However, these multiple independently sealed sub-battery compartments need to be connected to electrical components in the electrical compartment via conductive parts to monitor information such as temperature and voltage and control battery charging and discharging. Therefore, the sealing at the point where the conductive parts are led out is a weak point in the sealing of the sub-battery compartment. By extending a second partition beam between two sub-battery compartments into the electrical compartment to block the propagation of high-temperature gas in the electrical compartment during thermal runaway, the safety performance of the battery pack can be effectively improved.

[0026] This utility model discloses a battery pack, referenced... Figures 1-2 As shown, the battery pack includes a housing 100, a first partition beam 200, a second partition beam 300, and multiple conductive components 500.

[0027] The enclosure 100 refers to a closed or semi-closed structure made of materials such as metal and plastic. It serves as the physical carrier of the battery pack, and its design and manufacturing must meet the safety, reliability, and functionality requirements of the battery pack under different usage scenarios. The enclosure 100 provides installation space for the battery pack 400, BMS, cooling system, electrical connection components, etc., and through a reasonable structural design, fixes these components within the enclosure 100, ensuring they maintain a relatively stable position during battery pack operation and preventing damage or loosening of connections due to vibration, impact, or other factors. The enclosure 100 includes an upper enclosure and a lower enclosure. The lower enclosure includes a base plate and side plates connected to and surrounding the base plate. The upper enclosure is connected to the side plates and has a cover plate opposite to the base plate. The upper and lower enclosures together form an accommodating chamber. The enclosure 100 can be cast from materials such as steel plates and aluminum alloys, or lightweight materials such as glass fiber reinforced composite materials and carbon fiber reinforced composite materials.

[0028] The first partition beam 200 and the second partition beam 300 are placed on the base plate. The connection between the first partition beam 200 and the second partition beam 300 is sealed. The sealing connection can be achieved by welding, gluing, or other connection methods. The first partition beam 200 divides the space inside the battery pack into a battery compartment 110 and an electrical compartment 120 arranged along a second direction. The battery compartment 110 is used to house the battery pack 400, and the electrical compartment 120 is used to house electrical components such as the BMS (Battery Management System), BMU (Battery Management Unit), and conductive busbars. The second partition beam 300 divides the battery compartment 110 into multiple independent and sealed sub-battery compartments 111. The multiple sub-battery compartments 111 are arranged along a first direction, and the battery pack 400 is installed in the sub-battery compartment 111. The first direction and the second direction are parallel to the plane of the base plate, and the first direction and the second direction are set at an angle. Figure 1 The X direction in the middle, the second direction is Figure 1 In the Y direction, the first partition beam 200 is provided with a through portion 201 that extends through the first partition beam 200 along the second direction. Multiple conductive elements 500 are sealed through the through portion 201. Along the second direction, one end of the conductive element 500 is electrically connected to the battery pack 400, and the other end extends at least partially into the electrical compartment 120. Each conductive element 500 is used to electrically connect multiple battery packs 400, realizing the series and parallel connection of multiple battery packs 400. The conductive element 500 can electrically connect the output end of the battery pack 400 to the output end of the battery pack, or connect the output end of one battery pack 400 to the output end of another battery pack 400. The conductive element 500 can be made of conductive materials such as copper and gold according to actual needs. One end of the second partition beam 300 extends into the electrical compartment 120 along the second direction, and the length L extending into the electrical compartment 120 is L, which is the distance from the end of the second partition beam 300 located in the electrical compartment 120 to the surface of the second partition beam 300 near the electrical compartment 120. L satisfies the relationship: L≥10mm.

[0029] The conductive components 500 within the two sub-battery compartments 111 are located on both sides of the second partition beam 300 along the first direction. Taking two sub-battery compartments 111 as an example, the second partition beam 300 divides the battery compartment 110 into a first sub-battery compartment and a second sub-battery compartment. The first sub-battery compartment and the second sub-battery compartment are respectively provided with a first conductive component and a second conductive component. The first conductive component is used to connect the battery pack 400 in the first sub-battery compartment to the electrical components in the electrical compartment 110. The second conductive component is used to connect the battery pack 400 in the second sub-battery compartment to the electrical components in the electrical compartment 110. The electrical components can be circuit breakers, relays, etc. in the electrical compartment, or conductive components 500 extended from other sub-battery compartments. The ends of the first and second conductive components extending into the electrical compartment 120 are located on both sides of the second partition beam 300 extending into the electrical compartment 120 along the first direction.

[0030] It is understood that in this embodiment, the battery pack is provided with a first partition beam 200 and a second partition beam 300 inside the battery pack. The second partition beam 300 can divide the battery compartment into multiple independent and sealed sub-battery compartments 111, so that the battery packs 400 in the multiple sub-battery compartments 111 are independently sealed. When one battery pack 400 experiences thermal runaway, the impact on the battery packs 400 in the adjacent sub-battery compartments 111 is relatively limited, thereby helping to reduce the probability of thermal runaway propagation.

[0031] It should be further explained that, since the first partition beam 200 is provided with a through part 201, the battery pack 400 is electrically connected to the electrical components in the electrical compartment 120 through the conductive element 500 passing through the through part 201. Although the conductive element 500 is sealed inside the through part 201, under long-term use, the vibration of the conductive element 500 and the first partition beam 200 may cause gaps between the conductive element 500 and the through part 201. Or, under the high temperature environment during battery thermal runaway, the sealing position between the conductive element 500 and the through part 201 may fail due to heat. The gas generated by the thermal runaway of the battery pack 400 may enter the electrical compartment 120 through these gaps, and then enter the adjacent sub-battery compartment 111 from the electrical compartment 120, affecting the battery pack 400. In the technical solution disclosed in this utility model, one end of the second partition beam 300 extends into the electrical compartment 120. The portion of the second partition beam 300 and the electrical compartment 120 can prevent high-temperature flue gas entering the battery compartment 110 from entering the adjacent sub-battery compartment 111, thereby reducing the impact of high-temperature flue gas on other sub-battery compartments 111 in the event of thermal runaway in one sub-battery compartment 111 and improving the safety of the battery pack. Furthermore, if the length of the second partition beam 300 extending into the electrical compartment 120 is too small, its ability to block high-temperature flue gas is limited, which is not conducive to reducing the probability of thermal runaway propagation. In this embodiment, controlling the length L of the second partition beam 300 extending into the electrical compartment 120 to be greater than or equal to 10 mm ensures the blocking effect on high-temperature flue gas, thereby further reducing the probability of thermal runaway propagation.

[0032] Optionally, the conductive component 500 is sealed to the through portion 201 via a sealing element. The thickness of the sealing element is d, which satisfies the relationship: 1mm ≤ dmm ≤ 5mm. Specifically, it can be 1mm, 1.5mm, 2mm, 2.5mm, 3mm, 3.5mm, 4mm, 4.5mm, or 5mm, or other values ​​within the range of 1mm-5mm, and is not limited to the examples mentioned above. The thickness d of the sealing element refers to the minimum gap size between the outer peripheral wall of the conductive component 500 and the inner peripheral wall of the through portion 201. It is understood that sealing the connection with a sealing element can effectively prevent gas leakage and further reduce the probability of thermal runaway propagation. Further optionally, the sealing element can be a sealant or a gasket. The sealant can be a silicone sealant, a polyurethane sealant, or an epoxy resin sealant, etc., and the gasket can be EPDM rubber, fluororubber, etc.

[0033] Optional, see reference Figure 2As shown, in the second direction, the end of the second partition beam 300 is spaced apart from the side of the electrical compartment 120 opposite to the battery compartment 110, with a spacing of 50mm-200mm. Further optionally, the spacing between the end of the second partition beam 300 and the side of the electrical compartment 120 opposite to the battery compartment 110 can be 50mm, 55mm, 60mm, 65mm, 70mm, 75mm, 80mm, 85mm, 90mm, 95mm, 100mm, 105mm, 110mm, 115mm, 120mm, 125mm, 130mm, 135mm, 140mm, 145mm, 150mm, 155mm, 160mm, 165mm, 170mm, 175mm, 180mm, 185mm, 195mm, or 200mm. Other values ​​within the range of 50mm-200mm can also be selected according to actual needs, and are not limited to the examples above. It is understandable that a larger distance between the end of the second partition beam 300 and the side of the electrical compartment 120 facing away from the battery compartment 110 means that the length of the second partition beam 300 extending into the electrical compartment 120 is too small, reducing the barrier capability of the second partition beam 300 against high-temperature flue gas and hindering the reduction of the probability of thermal runaway propagation. Conversely, a smaller distance between the end of the second partition beam 300 and the side of the electrical compartment 120 facing away from the battery compartment 110 means that the length of the second partition beam 300 extending into the electrical compartment 120 is too large, occupying a large amount of space within the electrical compartment 120 and hindering the improvement of the battery pack's structural compactness. In this embodiment, the distance between the end of the second partition beam 300 and the side of the electrical compartment 120 facing away from the battery compartment 110 is controlled within the range of 50mm-200mm. This ensures the barrier function of the second partition beam 300 against high-temperature flue gas while controlling the second partition beam 300 from occupying too much space in the electrical compartment 120, thus improving the structural compactness of the battery pack.

[0034] Optional, see reference Figure 3 As shown, in the third direction, the top surface of the portion of the second partition beam 300 located within the electrical compartment 120 is not lower than the top surface of the first partition beam 200. Here, "top surface" refers to the surface of the first partition beam 200 and the second partition beam 300 away from the bottom plate. It can be understood that because the top surface of the portion of the second partition beam 300 located within the electrical compartment 120 is not lower than the bottom surface of the first partition beam 200, the high-temperature fumes generated during thermal runaway of the battery pack 400 in the sub-battery compartment 111 can accumulate at the top of the electrical compartment 120 when passing through the first partition beam 200. This reduces the impact on the conductive components 500 leading out of the adjacent sub-battery compartment 111, which not only helps reduce the probability of thermal runaway propagation but also reduces the space occupied by the second partition beam 300 in the electrical compartment 120, thus improving the structural compactness of the battery pack.

[0035] Optionally, the portion of the second partition beam 300 located within the electrical compartment 120 is lower than the top surface of the first partition beam 200, and the distance between them is 10mm-50mm. It is understood that if the distance between the top surface of the portion of the second partition beam 300 within the electrical compartment 120 and the first partition beam 120 is too small, it cannot effectively block gas propagation; if the distance is too large, it can easily lead to crosstalk between the thermal runaway gases of the two battery compartments 110, affecting the safety of the battery pack. In this embodiment, the distance between the top surface of the portion of the second partition beam 300 within the electrical compartment 120 and the first partition beam 120 is controlled within the range of 10mm-50mm. This ensures both the function of blocking gas propagation and reduces the probability of crosstalk between the thermal runaway gases of the two battery compartments 110, thereby improving the safety of the battery pack.

[0036] Optional, see reference Figure 3 As shown, the first partition beam 200 has a through hole 202 extending along the second direction, and the second partition beam 300 passes through the through hole 202 and extends into the electrical compartment 120. It can be understood that by providing a pipe through hole 330 on the first partition beam 200, and having the second partition beam 300 extend into the electrical compartment 120 through the pipe through hole 330, the connection strength between the second partition beam 300 and the first partition beam 200 is improved. Furthermore, this reduces the likelihood of seal failure at the connection between the second partition beam 300 and the first partition beam 200, which could lead to crosstalk of high-temperature flue gas. This helps ensure the blocking effect of the second partition beam 300 on high-temperature flue gas, thereby reducing the probability of thermal runaway propagation.

[0037] Further optional, see reference Figure 3 As shown, in the third-party direction, the third-party direction is Figure 3As shown in the Z direction, and perpendicular to both the first direction (X direction) and the second direction (Y direction), the height of the portion of the second partition beam 300 passing through the first partition beam 200 is lower than the height of the first partition beam 200, and the ratio of the height of the portion of the second partition beam 300 passing through the first partition beam 200 to the height of the first partition beam 200 is 0.3-1. Specifically, the ratio of the height of the portion of the second partition beam 300 passing through the first partition beam 200 to the height of the first partition beam 200 can be 0.3, 0.35, 0.4, 0.45, 0.5, 0.55, 0.6, 0.65, 0.7, 0.75, 0.8, 0.85, 0.9, 0.95, or 1. Of course, it can also be other values ​​within the range of 0.3-1, and is not limited to the examples above. Understandably, if the ratio of the height of the portion of the second partition beam 300 passing through the first partition beam 200 to the height of the first partition beam 200 is too small, it indicates that the height of the portion of the second partition beam 300 passing through the first partition beam 200 is too large. This increases the contact area between the first partition beam 200 and the second partition beam 300, increasing the size of the area to be sealed and thus increasing the probability of seal failure. Conversely, if the ratio of the height of the portion of the second partition beam 300 passing through the first partition beam 200 to the height of the first partition beam 200 is too large, it indicates that the height of the portion of the second partition beam 300 passing through the first partition beam 200 is too small, resulting in insufficient strength of both the first partition beam 200 and the second partition beam 300, which also increases the probability of seal failure. In this embodiment, the ratio of the height of the portion of the second partition beam 300 passing through the first partition beam 200 to the height of the first partition beam 200 is controlled between 0.3 and 1. This ensures that the area to be sealed in the connection contact area between the first partition beam 200 and the second partition beam 300 is relatively small, while also improving the connection strength between the first partition beam 200 and the second partition beam 300. This ensures the sealing performance of the connection between the first partition beam 200 and the second partition beam 300 and reduces the probability of crosstalk from high-temperature flue gas.

[0038] It should be noted that, in the actual installation process, the lower end of the through hole 202 can be left open. The second partition beam 300 is inserted into the first partition beam 200 from the open end of the through hole 202. If the through hole 202 is closed, the second partition beam 300 can be split into two sections. One section is stepped and is inserted into the through hole 202 from one of the battery compartment 110 or the electrical compartment 120. The other section is flat and is directly installed into the other of the battery compartment 110 or the electrical compartment 120. Then, it is connected to the first partition beam 200 by connecting bolts or other structures.

[0039] Alternatively, in the third direction, the height ratio of the portion of the second partition beam 300 passing through the first partition beam 200 to the height of the portion of the second partition beam 300 located in the electrical compartment 120 and battery compartment 110 is 0.2-1. It is understandable that if the height ratio of the portion of the second partition beam 300 located in the electrical compartment 120 and battery compartment 110 is too small, the second partition beam 300 is prone to breakage at the point where it passes through the first partition beam 200, leading to seal failure at the connection between the first partition beam 200 and the second partition beam 300. If the height ratio of the portion of the second partition beam 300 located in the electrical compartment 120 and battery compartment 110 is too large, it will increase the contact area between the first partition beam 200 and the second partition beam 300, increasing the size of the area to be sealed and also increasing the probability of seal failure. In this embodiment, the ratio of the height of the portion of the second partition beam 300 passing through the first partition beam 200 to the height of the portion of the second partition beam 300 located in the electrical compartment 120 and the battery compartment 110 is controlled within the range of 0.2-1. This ensures that the area to be sealed in the connection contact area between the first partition beam 200 and the second partition beam 300 is relatively small, while also improving the connection strength between the first partition beam 200 and the second partition beam 300. This ensures the sealing performance of the connection between the first partition beam 200 and the second partition beam 300 and reduces the probability of crosstalk from high-temperature flue gas.

[0040] Optional, see reference Figure 4 As shown, there are multiple through portions 201, and each through portion 201 is correspondingly arranged with a multiple conductive element 500. The minimum distance between the second partition beam 300 and the through portion 201 is 5mm-70mm. Specifically, the minimum distance between the second partition beam 300 and the through portion 201 can be 5mm, 10mm, 15mm, 20mm, 25mm, 30mm, 35mm, 40mm, 45mm, 50mm, 55mm, 60mm, 65mm, or 70mm. Of course, it can also be other values ​​within the range of 5mm-70mm, and is not limited to the examples mentioned above. Understandably, if the minimum distance between the second partition beam 300 and the through portion 201 is too small, the second partition beam 300 will have limited blocking effect on high-temperature flue gas in the event of thermal runaway, which is not conducive to controlling the spread of thermal runaway. In addition, there is a risk of overlap between the conductive component 500 and the second partition beam 300. If the minimum distance between the second partition beam 300 and the through portion 201 is too large, a longer conductive component 500 is required to connect the battery pack 400 and the internal components of the electrical compartment 120, which increases the internal resistance of the connection. In this embodiment, the minimum distance between the second partition beam 300 and the through portion 201 is controlled within the range of 5mm-70mm. This ensures that the second partition beam 300 can block high-temperature flue gas, which is conducive to controlling the spread of thermal runaway, while also controlling the length of the conductive component 500 and controlling the internal resistance of the connection.

[0041] Optional, see reference Figure 5As shown, in the third direction, the height of the portion of the second partition beam 300 located within the electrical compartment 120 is greater than the height of the first partition beam 200, and the height difference between the second partition beam 300 and the first partition beam 200 is H, where H satisfies the relationship: 10mm ≤ H ≤ 30mm. Specifically, H can be 10mm, 11mm, 12mm, 13mm, 14mm, 15mm, 16mm, 17mm, 18mm, 19mm, 20mm, 21mm, 22mm, 23mm, 24mm, 25mm, 26mm, 27mm, 28mm, 29mm, or 30mm. Of course, it can also be other values ​​within the range of 10mm-30mm, and is not limited to the examples mentioned above. Understandably, as mentioned above, the top surface of the portion of the second partition beam 300 located within the electrical compartment 120 is not lower than the bottom surface of the first partition beam 200. This allows the high-temperature fumes generated during thermal runaway of the battery pack 400 in the sub-battery compartment 111 to accumulate at the top of the electrical compartment 120 when passing through the first partition beam 200, reducing the impact on the conductive components 500 leads in adjacent sub-battery compartments 111. If the height difference H between the second partition beam 300 and the first partition beam 200 is small, the impact of the high-temperature fumes on the conductive components 500 leads in adjacent sub-battery compartments 111 will be reduced. The impact of the flue gas on the conductive parts 500 in the adjacent sub-battery compartment 111 can be significant. If the height difference H between the second partition beam 300 and the first partition beam 200 is large, it will occupy too much space in the electrical compartment 120, which is not conducive to improving the energy density of the battery pack. In this embodiment, the height difference between the second partition beam 300 and the first partition beam 200 is controlled within the range of 10mm-30mm. This can reduce the impact of high-temperature flue gas on the conductive parts 500 in the adjacent sub-battery compartment 111, and also reduce the space occupied by the second partition beam 300 in the electrical compartment 120, which is conducive to improving the energy density of the battery pack.

[0042] In an alternative embodiment of this utility model, in the third direction, the bottom of the second partition beam 300 located in the electrical compartment 120 is spaced apart from the bottom of the first partition beam 200, and the spacing is 10mm-50mm. The spacing can be 10mm, 15mm, 20mm, 25mm, 30mm, 35mm, 40mm, 45mm, 50mm, or other values ​​within the range of 10mm-50mm, and is not limited to the above distance. It is understandable that the spacing between the bottom of the second partition beam 300 and the bottom of the first partition beam 200 within the electrical compartment 120 provides space for the connection of electrical components (such as busbars) within the electrical compartment 120, facilitating the connection of these components. If the spacing between the bottom of the second partition beam 300 and the bottom of the first partition beam 200 is too small, it cannot effectively block gas propagation; if the spacing is too large, it can easily lead to crosstalk between the thermal runaway gases of the two battery compartments 110, affecting the safety of the battery pack. In this embodiment, the distance between the bottom of the second partition beam 300 and the bottom of the first partition beam 200 within the electrical compartment 120 is controlled between 10mm and 50mm. This effectively blocks gas propagation while reducing the probability of crosstalk between the thermal runaway gases of the two battery compartments 110, ensuring the safety of the battery pack.

[0043] In an alternative embodiment of this invention, in the third-party direction, the bottom of the second partition beam 300 located within the electrical compartment 120 is flush with the bottom of the first partition beam 200. This arrangement improves the strength of the battery pack and prevents the connection between the second partition beam 300 and the first partition beam 200 from failing during battery pack vibration, which could lead to gas crosstalk during thermal runaway and affect battery pack safety.

[0044] Optionally, in the first direction, the ratio of the length of the portion of the second partition beam 300 located in the electrical compartment 120 to the length of the first partition beam 200 is 0.001-0.06. The ratio can be 0.001, 0.005, 0.01, 0.015, 0.02, 0.025, 0.03, 0.035, 0.04, 0.045, 0.05, 0.055, or 0.06, or other values ​​within the range of 0.001-0.06, and is not limited to the examples mentioned above. It is understandable that a smaller ratio between the length of the portion of the second partition beam 300 located in the electrical compartment 120 and the length of the first partition beam 200 would reduce the isolation effect of the second partition beam 300 on high-temperature flue gas, which could easily affect the lead-out portion of the conductive component 500 of the adjacent sub-battery compartment 111. Conversely, a larger ratio between the length of the portion of the second partition beam 300 located in the electrical compartment 120 and the length of the first partition beam 200 would occupy too much space in the electrical compartment 120, which would be detrimental to improving the energy density of the battery pack. In this embodiment, the ratio between the length of the portion of the second partition beam 300 located in the electrical compartment 120 and the length of the first partition beam 200 is controlled within the range of 0.001-0.06, which ensures the isolation effect of the second partition beam 300 on high-temperature flue gas while controlling the space occupied by the second partition beam 300 within the electrical compartment 120.

[0045] Optionally, the length of the second partition beam 300 located in the electrical compartment 120 is 15mm-95mm, specifically 15mm, 20mm, 25mm, 30mm, 35mm, 40mm, 45mm, 50mm, 55mm, 60mm, 65mm, 70mm, 75mm, 80mm, 85mm, 90mm, or 95mm. Other values ​​between 15mm and 95mm can also be selected according to actual needs, and are not limited to the examples mentioned above.

[0046] Optionally, the length of the first partition beam 200 is 600mm-1600mm, specifically 600mm, 650mm, 700mm, 750mm, 800mm, 850mm, 900mm, 950mm, 1000mm, 1050mm, 1100mm, 1150mm, 1200mm, 1250mm, 1300mm, 1350mm, 1400mm, 1450mm, 1500mm, 1550mm, or 1600mm. Of course, it can also be other values ​​within the range of 600mm-1600mm, and is not limited to the examples mentioned above.

[0047] Optionally, the distance between the portion of the second partition beam 300 located in the electrical compartment 120 and the conductive element 500 along the second direction ranges from 5mm to 200mm. Specifically, it can be 5mm, 10mm, 15mm, 20mm, 25mm, 30mm, 35mm, 40mm, 45mm, 50mm, 55mm, 60mm, 65mm, 70mm, 75mm, 80mm, 85mm, 90mm, 95mm, 100mm, 10mm, 105mm, 110mm, 120mm, 125mm, 130mm, 135mm, 140mm, 145mm, 150mm, 155mm, 160mm, 165mm, 170mm, 175mm, 180mm, 185mm, 190mm, 195mm, or 200mm. Of course, it can also be other values ​​within the range of 5mm to 200mm, and is not limited to the examples mentioned above.

[0048] Optional, see reference Figure 6 As shown, in the second direction, the end of the second partition beam 300 abuts against the side of the electrical compartment 120 opposite to the battery compartment 110, thereby dividing the electrical compartment 120 into multiple sub-electrical compartments 121. It is understood that by dividing the electrical compartment 120 into multiple sub-electrical compartments 121, the second partition beam 300 enhances its ability to block high-temperature flue gas, minimizing the impact of high-temperature flue gas on the lead-out portions of the conductive parts 500 of adjacent sub-battery compartments 111, thus reducing the probability of thermal runaway propagation. Furthermore, it increases the fixing strength of the second partition beam 300, thereby increasing the strength between the first partition beam 200 and the second partition beam 300, and reducing the probability of seal failure at the connection point.

[0049] Further optional, see reference Figure 7 As shown, the portion of the second partition beam 300 located within the electrical compartment 120 is provided with a through hole 330 extending along the first direction to facilitate electrical connection between electrical components located in two adjacent sub-electrical compartments 121. The cross-sectional area of ​​the through hole 330 in the third direction is 100 mm². 2 -500mm 2 Specifically, it can be 100mm 2 150mm 2 200mm 2 250mm 2 300mm 2 350mm 2 400mm 2 450mm 2 500mm 2 Of course, it can also be 100mm. 2 -500mm 2Other values ​​within the range are not limited to those listed above. It is understood that while providing through holes 330 on the second partition beam 300 facilitates electrical connections between electrical components within the two sub-electrical compartments 121, a small cross-sectional area of ​​the through hole 330 makes it inconvenient to lead out wires, and multiple wires are prone to overlapping during connection, causing insulation failure. Conversely, a large cross-sectional area of ​​the through hole 330 increases the probability of crosstalk from high-temperature flue gas. In this embodiment, the cross-sectional area of ​​the through hole 330 in the third direction is controlled at 100 mm². 2 -500mm 2 Within this range, it can facilitate the electrical connection between electrical components in the two sub-electrical compartments 121, reducing the probability of insulation failure, and also minimize the probability of crosstalk in high-temperature flue gas, thereby reducing the probability of thermal runaway propagation.

[0050] Further options are available, see reference. Figure 7 As shown, in the third direction, the height of the through hole 330 is lower than the height of the through portion 201, and the distance between the through hole 330 and the through portion 201 is 10mm-60mm, specifically 10mm, 15mm, 20mm, 25mm, 30mm, 35mm, 40mm, 45mm, 50mm, 55mm, 60mm, or other values ​​between 10mm-60mm can be selected according to actual needs, and are not limited to the examples mentioned above. Logically, as mentioned above, the high-temperature flue gas generated by the thermal runaway of the battery pack 400 enters the electrical compartment 120 through the through-hole 201. If the height of the through hole 330 is higher than the height of the through-hole 201, it is easy to increase the probability of crosstalk of the high-temperature flue gas. If the distance between the through hole 330 and the through-hole 201 is too large, the through hole 330 will be too close to the bottom wall of the housing 100, which may cause the wires to lap against the housing 100. If the distance between the through hole 330 and the through-hole 201 is too small, the flue gas can easily enter the adjacent sub-electrical compartment 121 through the through hole 330. In this embodiment, the distance between the through hole 330 and the through portion 201 is controlled within the range of 10mm-60mm. This can prevent the insulation failure caused by the wires overlapping the housing 100, and also ensure the isolation effect of the second partition beam 300 on the high-temperature flue gas. This reduces the impact of the high-temperature flue gas on the lead-out portion of the conductive part 500 of the adjacent sub-battery compartment 111, and reduces the probability of thermal runaway propagation.

[0051] Optionally, in the third direction, the top height of the through hole 330 is lower than the bottom of the through portion 201, and the distance between them is within the range of 5mm-30mm, specifically 5mm, 6mm, 7mm, 8mm, 9mm, 10mm, 11mm, 12mm, 13mm, 14mm, 15mm, 16mm, 17mm, 18mm, 19mm, 20mm, 21mm, 22mm, 23mm, 24mm, 25mm, 26mm, 27mm, 28mm, 29mm, and 30mm. Other values ​​within the range of 5mm-30mm can also be selected according to actual needs. Having the top height of the through hole 330 lower than the bottom of the through portion 201, and controlling the distance between them within the range of 5mm-30mm, can improve the sealing effect at the connection between the first separator beam 200 and the second separator beam 300, reduce the probability of gas crosstalk during thermal runaway, and improve the safety of the battery pack.

[0052] Optional, see reference Figure 8 As shown, the second partition beam 300 includes a first sub-partition beam 310 and a second sub-partition beam 320. In a second direction, the first sub-partition beam 310 and the second sub-partition beam 320 are located on both sides of the first partition beam 200 and are fixedly connected to the first partition beam 200. It can be understood that splitting the second partition beam 300 into the first sub-partition beam 310 and the second sub-partition beam 320, with each sub-partition beam 310 and the second sub-partition beam 320 respectively fixedly connected to the first partition beam 200, ensures the sealing of the connection point between the first partition beam 200 and the second partition beam 300, thereby reducing the probability of crosstalk of high-temperature flue gas at the connection point. In embodiments of this utility model, the connection methods between the first sub-partition beam 310 and the second sub-partition beam 320 and the first partition beam 200 are varied. They can be connected by screws or other connectors, welded together, or riveted using a mortise and tenon structure; the specific method can be adjusted according to actual needs.

[0053] Optionally, in the third direction, the height of the portion of the second partition beam 300 that passes through the first partition beam 200 is not lower than the height of the first partition beam 200, which helps to reduce the probability of crosstalk from the connection point of the first partition beam 200 and the second partition beam 300.

[0054] Optionally, in the third direction, the height of the portion of the second partition beam 300 passing through the first partition beam 200 is greater than the height of the first partition beam 200, and the height difference between the portion of the second partition beam 300 passing through the first partition beam 200 and the first partition beam 200 is 5mm-10mm, specifically 5mm, 5.5mm, 6mm, 6.5mm, 7mm, 7.5mm, 8mm, 8.5mm, 9mm, 9.5mm, and 10mm. It is understandable that if the height difference between the portion of the second partition beam 300 passing through the first partition beam 200 and the first partition beam 200 is too small, it is not conducive to reducing the probability of crosstalk from the connection point of the first partition beam 200 and the second partition beam 300. If the height difference between the portion of the second partition beam 300 passing through the first partition beam 200 and the first partition beam 200 is too large, it increases the space occupied by the second partition beam 300, which is not conducive to improving the structural compactness of the battery pack. In this embodiment, the height difference between the portion of the second partition beam 300 that passes through the first partition beam 200 and the height of the first partition beam 200 is 5mm-10mm. This not only helps to reduce the probability of crosstalk from the connection point of the first partition beam 200 and the second partition beam 300, but also controls the space volume occupied by the second partition beam 300, which helps to improve the structural compactness of the battery pack.

[0055] Further optional, see reference Figure 9 As shown, in the third direction, the height of the portion of the second partition beam 300 passing through the first partition beam 200 is flush with the height of the first partition beam 200. It can be understood that the fact that the height of the portion of the second partition beam 300 passing through the first partition beam 200 is flush with the first partition beam 200 effectively divides the first partition beam 200 into two sub-partition beams. Each sub-partition beam is fixedly connected to the second partition beam 300, ensuring the sealing of the connection between the first partition beam 200 and the second partition beam 300. This helps reduce the probability of crosstalk of high-temperature flue gas at the connection point between the first partition beam 200 and the second partition beam 300.

[0056] Optional, see reference Figure 10 As shown, in the third direction, the height of the portion of the second partition beam 300 located in the battery compartment 110 is greater than or equal to the height of the first partition beam 200, and the length L of the portion of the second partition beam 300 located in the battery compartment 110 satisfies the relationship: L≥15mm. It can be understood that the relatively high height of the portion of the second partition beam 300 located in the battery compartment 110 can effectively reduce the probability of thermal runaway of the battery pack 400 in one of the two adjacent sub-battery compartments 111, and the crosstalk of high-temperature flue gas to the other adjacent sub-battery compartment 111, thereby reducing the probability of thermal runaway propagation.

[0057] Optionally, in the third direction, the height of the portion of the second partition beam 300 located in the battery compartment 110 is greater than the height of the first partition beam 200, and the difference between the height of the portion of the second partition beam 300 located in the battery compartment 110 and the height of the first partition beam 200 is 1mm-10mm, specifically 1mm, 2mm, 3mm, 4mm, 5mm, 6mm, 7mm, 8mm, 9mm, or 10mm, or other values ​​within the range of 1mm-10mm can be selected according to actual needs. It is understandable that if the difference between the height of the portion of the second partition beam 300 located in the battery compartment 110 and the height of the first partition beam 200 is too small, it will increase the probability of high-temperature flue gas crosstalk into another adjacent sub-battery compartment 111; if the difference is too large, it will increase the space occupied by the second partition beam 300, which is not conducive to improving the energy density of the battery pack. In this embodiment, the height difference between the portion of the second partition beam 300 located in the battery compartment 110 and the height of the first partition beam 200 is controlled within the range of 1mm-10mm. This not only reduces the probability of high-temperature flue gas crosstalk into another adjacent sub-battery compartment 111, but also helps to improve the energy density of the battery pack.

[0058] Optional, see reference Figure 11 As shown, the second partition beam 300 is installed through the through-part 201, and the length L of the second partition beam 300 extending into the electrical compartment 120 is ≥12mm. It is understandable that providing a through-part 201 to lead out the conductive components 500 from multiple sub-battery compartments 111 facilitates assembly. Extending the second partition beam 300 into the through-part 201 further improves sealing. However, this results in the second partition beam 300 being too close to the sealing connection between the through-part 201 and the conductive component 500, increasing the probability of crosstalk. Therefore, the length L of the second partition beam 300 extending into the electrical compartment 120 needs to be set to be greater than or equal to 12mm to ensure the second partition beam 300's blocking effect on high-temperature flue gas, thereby reducing the probability of crosstalk from high-temperature flue gas.

[0059] Optionally, two adjacent battery packs 400 can be connected in series and / or in parallel via conductive components 500. When high-voltage transmission is required to increase the battery charge / discharge rate, the battery packs 400 are connected in series; when there is a safety risk with one battery pack 400 in the battery pack, or when only one battery pack 400 needs to be charged and discharged, the circuit is switched to parallel.

[0060] This utility model also discloses a battery device, including any of the battery packs described above. The battery device can serve as the operating power source for an electrical device, or as the driving power source for the electrical device, replacing or partially replacing fuel or natural gas to provide driving power for a vehicle. Electrical devices include devices or equipment in numerous technical fields such as energy storage devices, electric ships, aircraft, laptops, power tools, electric bicycles, electric motorcycles, electric cars, military equipment, and aerospace.

[0061] In the description of this specification, references to terms such as "some embodiments," "other embodiments," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0062] Obviously, the above embodiments of this utility model are merely examples for clearly illustrating the present utility model, and are not intended to limit the implementation of the present utility model. Those skilled in the art can make various obvious changes, readjustments, and substitutions without departing from the protection scope of this utility model. It is neither necessary nor possible to exhaustively describe all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this utility model should be included within the protection scope of the claims of this utility model.

Claims

1. A battery pack, characterized in that, include: The enclosure comprises a housing, a first partition beam, and a second partition beam. The housing includes a base plate, on which the first and second partition beams are placed. The connection between the first and second partition beams is sealed. The first partition beam divides the space inside the housing into a battery compartment and an electrical compartment arranged along a second direction. The second partition beam divides the battery compartment into multiple independent and sealed sub-battery compartments. The multiple sub-battery compartments are arranged along a first direction. The first and second directions are parallel to the plane of the base plate and intersect. Each sub-battery compartment contains a battery pack. The first partition beam has a through-beam extending along the second direction through the first partition beam. Multiple conductive elements are sealed through the through portion and, along the second direction, one end of each conductive element is electrically connected to the battery pack, and the other end at least partially extends into the electrical compartment, wherein: One end of the second partition beam extends into the electrical compartment along the second direction, and the length L extending into the electrical compartment satisfies the relationship: L≥10mm; The conductive components corresponding to two adjacent sub-battery compartments are located on both sides of the second partition beam along the first direction.

2. The battery pack according to claim 1, characterized in that, In the third direction, the top surface of the portion of the second partition beam located inside the electrical compartment is not lower than the top surface of the first partition beam, and the third direction is perpendicular to the first and second directions.

3. The battery pack according to claim 1, characterized in that, The portion of the second partition beam located inside the electrical compartment is lower than the top surface of the first partition beam, and the distance between the second partition beam and the top surface of the first partition beam is 10mm-50mm.

4. The battery pack according to claim 2, characterized in that, In the third direction, the height of the portion of the second partition beam located inside the electrical compartment is greater than the height of the first partition beam, and the height difference between the second partition beam and the first partition beam is H, where H satisfies the relationship: 10mm≤H≤30mm.

5. The battery pack according to claim 1, characterized in that, In the third direction, the bottom of the second partition beam located within the electrical compartment is spaced apart from the bottom of the first partition beam.

6. The battery pack according to claim 1, characterized in that, In the third direction, the bottom of the second partition beam located within the electrical compartment is flush with the bottom of the first partition beam.

7. The battery pack according to claim 1, characterized in that, In the first direction, the ratio of the length of the portion of the second partition beam located in the electrical compartment to the length of the first partition beam is 0.001-0.

06.

8. The battery pack according to claim 7, characterized in that, The distance between the portion of the second partition beam located in the electrical compartment and the conductive element along the second direction ranges from 5mm to 200mm.

9. The battery pack according to claim 1, characterized in that, In the second direction, the end of the second partition beam abuts against the side of the electrical compartment away from the battery compartment to divide the electrical compartment into multiple sub-electrical compartments.

10. The battery pack according to claim 9, characterized in that, The portion of the second partition beam located within the electrical compartment has a through hole extending along a first direction, the cross-sectional area of ​​which in a third direction is 100 mm². 2 -500mm 2 .

11. The battery pack according to claim 10, characterized in that, In the third direction, the height of the through hole is lower than the height of the through portion, and the distance between the through hole and the through portion is 10mm-60mm.

12. The battery pack according to claim 11, characterized in that, In the third direction, the top height of the through hole is lower than the bottom of the through portion, and the distance between the two is in the range of 5mm-30mm.

13. The battery pack according to claim 1, characterized in that, In the second direction, the second partition beam is located at the end of the electrical compartment and is spaced apart from the side of the electrical compartment away from the battery compartment, with a spacing of 50mm-200mm.

14. The battery pack according to claim 1, characterized in that, The second partition beam includes a first sub-partition beam and a second sub-partition beam. In a second direction, the first sub-partition beam and the second sub-partition beam are located on both sides of the first partition beam and are fixedly connected to the first partition beam.

15. The battery pack according to claim 1, characterized in that, The first partition beam has a through hole extending along the second direction, and the second partition beam passes through the through hole and extends into the electrical compartment.

16. The battery pack according to claim 15, characterized in that, In the third direction, the height of the portion of the second partition beam passing through the first partition beam is lower than the height of the first partition beam, and the ratio of the height of the portion of the second partition beam passing through the first partition beam to the height of the first partition beam is 0.3-1.

17. The battery pack according to claim 15, characterized in that, In the third direction, the ratio of the height of the portion of the second partition beam passing through the first partition beam to the height of the portion of the second partition beam located in the battery compartment is 0.2-1.

18. The battery pack according to claim 1, characterized in that, In the third direction, the height of the portion of the second partition beam that passes through the first partition beam is flush with the height of the first partition beam.

19. The battery pack according to claim 1, characterized in that, In the third direction, the height of the portion of the second partition beam located in the battery compartment is greater than or equal to the height of the first partition beam, and the length L of the portion of the second partition beam located in the battery compartment satisfies the relationship: L≥15mm.

20. The battery pack according to claim 19, characterized in that, In the third direction, the height of the portion of the second partition beam located in the battery compartment is greater than the height of the first partition beam, and the difference between the height of the portion of the second partition beam located in the battery compartment and the height of the first partition beam is 1mm-10mm.

21. The battery pack according to claim 1, characterized in that, The second partition beam is disposed at least partially through the through section, and the length L of the second partition beam extending into the electrical compartment is ≥12mm.

22. The battery pack according to claim 1, characterized in that, There are multiple through sections, and each of the multiple through sections is arranged in a one-to-one correspondence with a multiple of the conductive components. The minimum distance between the second partition beam and the through section is 5mm-70mm.

23. The battery pack according to claim 1, characterized in that, Two adjacent battery packs are connected in series and / or in parallel via conductive components.

24. The battery pack according to claim 1, characterized in that, The conductive component is connected to the through portion via a sealing component, the thickness of which is d, and d satisfies the relationship 1mm≤dmm≤5mm.

25. A battery device, characterized in that, Includes the battery pack as described in any one of claims 1-24.

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