Battery and electric device

Abstract

The utility model relates to a battery and an electric device. The battery comprises a battery box with an accommodating cavity; the plurality of battery modules are arranged in the accommodating cavity along a first direction, the first direction is the width direction of the battery box, and filling cavities are formed between every two adjacent battery modules and between the side wall of the accommodating cavity along the first direction and the battery modules at intervals; the multiple cooling plates are arranged in the filling cavities in the third direction, each cooling plate and the corresponding adjacent battery module are arranged at intervals, and the third direction is the height direction of the battery box; and the heat-conducting glue is filled in each filling cavity. Compared with a mode of coating glue on the surface of the cooling plate in the prior art, the mode of integrally filling the filling cavity is adopted, so that the phenomenon of non-uniform heat-conducting glue between the cooling plate and the battery module is avoided, the relatively good heat-conducting efficiency between the cooling plate and the battery module is ensured, and the cooling efficiency of the battery module is favorably improved.

Description

Technical Field

[0001] This application relates to the field of battery technology, specifically to a battery and an electrical device. Background Technology

[0002] Lithium-ion batteries have advantages such as high energy density, long cycle life, high rate performance, good safety, and environmental friendliness, making them an important energy source for modern electronic products and electric vehicles. To increase output voltage or current, batteries typically consist of multiple individual cells connected in series, parallel, or a combination thereof, with each cell integrated within a battery pack.

[0003] The battery also includes a cooling plate for cooling a heat-generating element (such as an electrical connector), which is connected to the heat-generating element by thermally conductive adhesive. However, when the cooling plate is assembled vertically, the thermally conductive adhesive will flow downwards under gravity after application, resulting in uneven distribution of the thermally conductive adhesive between the cooling plate and the heat-generating element. This significantly reduces the thermal conductivity and adversely affects the cooling effect. Utility Model Content

[0004] Therefore, it is necessary to provide a battery and electrical device that can avoid uneven thermal conductive adhesive and thus improve the cooling effect in order to address the above problems.

[0005] On one hand, this application provides a battery, comprising:

[0006] The battery box has a receiving cavity;

[0007] Multiple battery modules are arranged in the receiving cavity along a first direction, which is the width direction of the battery box. Filling cavities are formed between each pair of adjacent battery modules and between the side wall of the receiving cavity and the battery modules along the first direction.

[0008] Multiple cooling plates are respectively disposed within each of the filling cavities along a third direction, and each cooling plate is spaced apart from the adjacent battery module, wherein the third direction is the height direction of the battery box; and

[0009] Thermally conductive adhesive is used to fill each of the filling cavities.

[0010] In some embodiments, each battery module includes multiple battery cells and multiple busbars. The multiple battery cells are stacked along a second direction, which is the length direction of the battery pack. Each battery cell has a terminal post on both sides along the first direction. The terminals of two adjacent battery cells on the same side are electrically connected through the busbars. Each cooling plate has a preset interval distance with the busbar of the adjacent battery module. The preset interval distance is greater than or equal to 1 mm and less than or equal to 3 times the thickness of the cooling plate.

[0011] In some embodiments, each battery module further includes a plurality of elastic spacers, with each elastic spacer disposed between every two adjacent battery cells, and the inner wall of the battery box presses against the battery module along the second direction to cause each elastic spacer to be compressed and undergo elastic deformation.

[0012] In some embodiments, each battery module further includes a data acquisition circuit board and multiple connectors, the data acquisition circuit board being disposed on one side of each battery cell along the third direction; the data acquisition circuit board being electrically connected to multiple busbars via the connectors.

[0013] In some embodiments, the battery box includes a frame and a top plate and a bottom plate respectively covering both sides of the frame along the third direction, the frame, the top plate and the bottom plate together enclosing the receiving cavity;

[0014] The base plate has a plurality of protrusions on one side facing the receiving cavity. The plurality of protrusions are spaced apart along the first direction, and each battery module abuts against the protrusions on both sides of its bottom along the first direction.

[0015] In some embodiments, the protrusion has an elastic layer on the side facing the battery module along the third direction.

[0016] In some embodiments, the battery box further includes a crossbeam disposed within the receiving cavity, the crossbeam extending along the first direction and dividing the receiving cavity along the second direction into a battery compartment and an electrical compartment, wherein a plurality of battery modules are installed in the battery compartment;

[0017] The crossbeam has multiple first slots corresponding to each of the filling cavities, and one end of each cooling plate is inserted into the corresponding first slot.

[0018] In some embodiments, each of the first slots is provided with a resilient sealing gasket, the resilient sealing gasket having a second slot for the cooling plate to be inserted into.

[0019] In some embodiments, the second slot includes a guide section and a clamping section arranged sequentially along the third direction, the guide section having an opening toward the top plate, and the cooling plate being inserted through the opening of the guide section and interference-fitted into the clamping section;

[0020] The width of the guide section gradually decreases from the end with the opening to the end facing the clamping section, and the width of the opening of the guide section is greater than the thickness of the cooling plate.

[0021] On the other hand, this application provides an electrical device including a battery as described in any of the above embodiments.

[0022] Compared with existing technologies, this application has the following advantages: each filling cavity inside the battery box is entirely filled with thermally conductive adhesive, thereby ensuring that the gaps between each cooling plate and the battery module are filled with thermally conductive adhesive. By using an overall filling method for the filling cavities, uneven distribution of thermally conductive adhesive between the cooling plate and the battery module is avoided, ensuring better thermal conductivity between the cooling plate and the battery module, which is beneficial for improving the cooling efficiency of the battery module. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the battery structure in one embodiment of this application (top plate omitted);

[0024] Figure 2 for Figure 1 A top view of the battery shown;

[0025] Figure 3 for Figure 1 A schematic diagram of the exploded structure of the battery;

[0026] Figure 4 for Figure 1 The diagram shows the structural structure of the battery module.

[0027] Figure 5 for Figure 1 The cross-sectional view of the battery perpendicular to the second direction is shown.

[0028] Figure 6 for Figure 5 The image shows a magnified view of a portion of the battery within the filling cavity.

[0029] Figure 7 for Figure 1 A partial enlarged view of the battery at the first slot of the crossbeam;

[0030] Figure 8 for Figure 1 The image shows a partial enlarged view of the battery at the first slot of the crossbeam (cooling plate omitted). Detailed Implementation

[0031] To make the above-mentioned objectives, features, and advantages of this application more apparent and understandable, the specific embodiments of this application are described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a thorough understanding of this application. However, this application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this application. Therefore, this application is not limited to the specific embodiments disclosed below.

[0032] In the description of this application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, are only for the convenience of describing this application and simplifying the description, 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, and therefore should not be construed as a limitation of this application.

[0033] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this application, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0034] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., 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, unless otherwise expressly limited. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0035] In this application, unless otherwise expressly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0036] It should be noted that when an element is referred to as being "fixed to" or "set on" another element, it can be directly on the other element or there may be an intervening element. When an element is considered to be "connected to" another element, it can be directly connected to the other element or there may be an intervening element. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only possible implementation.

[0037] One embodiment of this application provides an electrical device that uses a battery as its power source. Specifically, the electrical device can be a vehicle, mobile phone, portable device, laptop computer, ship, spacecraft, electric toy, and power tool, etc. Vehicles can be gasoline-powered vehicles, natural gas-powered vehicles, or new energy vehicles; new energy vehicles can be pure electric vehicles, hybrid electric vehicles, or range-extended electric vehicles, etc.; spacecraft include airplanes, rockets, space shuttles, and spacecraft, etc.; electric toys include stationary or mobile electric toys, such as game consoles, electric car toys, electric ship toys, and electric airplane toys, etc.; power tools include metal cutting power tools, grinding power tools, assembly power tools, and railway power tools, such as electric drills, electric grinders, electric wrenches, electric screwdrivers, electric hammers, impact drills, concrete vibrators, and electric planers, etc. This application embodiment does not impose any special limitations on the above-mentioned electrical devices.

[0038] The specific structure of the battery is described below with reference to the accompanying drawings. Please refer to the attached diagram. Figures 1 to 3 As shown, the battery includes a battery case 10, multiple battery modules 20, multiple cooling plates 30, and thermally conductive adhesive (not shown). The battery case 10 provides a receiving cavity a1 for accommodating the battery modules 20, that is, each battery module 20 is housed within the receiving cavity a1 of the battery case 10. The battery case 10 can adopt various structures and shapes, such as a cuboid. The battery modules 20 are arranged at intervals along a first direction X within the receiving cavity a1. Please refer to [further details omitted]. Figure 6A filling cavity a4 is formed between each pair of adjacent battery modules 20, and a filling cavity a4 is also formed between the sidewall of the receiving cavity a1 in the first direction X and the battery module 20. Multiple cooling plates 30 are respectively disposed within each filling cavity a4, and all extend along the third direction Z, making the cooling plate 30 a plate-like structure with a certain width along the third direction Z. The width direction of the battery box 10 is the first direction X, the length direction of the battery box 10 is the second direction Y, and the height direction of the battery box 10 is the third direction Z. Each cooling plate 30 is spaced apart from adjacent battery modules 20, and thermally conductive adhesive is filled in each filling cavity a4, thereby filling the gap between the cooling plate 30 and the adjacent battery module 20, ensuring the cooling effect of the cooling plate 30 on the battery module 20.

[0039] In the aforementioned battery, each filling cavity a4 within the battery case 10 is entirely filled with thermally conductive adhesive, thereby ensuring that the gaps between each cooling plate 30 and the battery module 20 are filled with thermally conductive adhesive. Compared to the prior art method of applying adhesive to the surface of the cooling plate 30, the method of entirely filling the filling cavity a4 in this application avoids the phenomenon of uneven thermally conductive adhesive between the cooling plate 30 and the battery module 20, ensuring better thermal conductivity between the cooling plate 30 and the battery module 20, which is beneficial to improving the cooling efficiency of the battery module 20.

[0040] Specifically Figure 1 In the illustrated embodiment, there are four battery modules 20, which are spaced apart along the first direction X within the receiving cavity a1, thereby forming five filling cavities a4. Each of the five filling cavities a4 contains a cooling plate 30, resulting in a total of five cooling plates 30. However, the number of battery modules 20 and cooling plates 30 is not limited to this; it is sufficient that each battery module 20 forms filling cavities a4 on both sides of the first direction X, and that a cooling plate 30 is arranged within each filling cavity a4. No limitation is imposed here.

[0041] Please see also Figure 4 Specifically, in each embodiment, each battery module 20 includes multiple battery cells 21 and multiple busbars 22. The multiple battery cells 21 are stacked along a second direction Y. Each battery cell 21 has terminals 211 on both sides in a first direction X. The terminals 211 of two adjacent battery cells 21 located on the same side in the second direction Y are welded together via busbars 22 to achieve electrical connection. Each cooling plate 30 has a preset interval distance from the busbar 22 of the adjacent battery module 20. Because the filling cavity a4 is filled with thermally conductive adhesive, the space between each cooling plate 30 and the busbar 22 of the adjacent battery module 20 is filled with conductive adhesive, ensuring that the cooling plate 30 provides better cooling to the busbar 22 of the adjacent battery module 20.

[0042] Optionally, the aforementioned preset interval distance is greater than or equal to 1 mm and less than or equal to 3 times the thickness of the cooling plate 30. In this way, the preset interval distance is set within a reasonable range, thereby maximizing the cooling effect of the cooling plate 30 on the busbar 22 of the adjacent battery module 20.

[0043] Specifically, in each battery module 20, each battery cell 21 has at least two terminals 211 on both sides in the first direction X, which greatly increases the number of terminals 211 in the battery cell 21, thereby increasing the current carrying capacity of the battery cell 21 and further improving the fast charging performance of the battery. With the improvement of fast charging performance, the current of each busbar 22 increases during fast charging, leading to increased heat generation. Since the busbars 22 on both sides of each battery module 20 in the first direction X can be cooled by two adjacent cooling plates 30, the cooling effect is good and can meet the cooling requirements of the busbars 22 during fast charging.

[0044] Preferably, in each battery module 20, each battery cell 21 has one positive terminal and one negative terminal on one side in the first direction X, and each battery cell 21 also has one positive terminal and one negative terminal on the other side in the first direction X. That is, each battery cell 21 includes a total of two positive terminals and two negative terminals. Of course, in other embodiments, in each battery module 20, each battery cell 21 may also have two positive terminals on one side in the first direction X, and each battery cell 21 may also have two negative terminals on the other side in the first direction X.

[0045] Please continue reading Figures 1 to 3 and Figure 5 In the embodiments of this application, the battery box 10 includes a frame 11 and a top plate (not shown) and a bottom plate 13 respectively covering the two sides of the frame 11 in the third direction Z. The frame 11, the top plate, and the bottom plate 13 together enclose the aforementioned receiving cavity a1. The bottom plate 13 has a plurality of protrusions 131 protruding from one side facing the receiving cavity a1, and the plurality of protrusions 131 are spaced apart along the first direction X. Each battery module 20 abuts against two adjacent protrusions 131 on both sides of its bottom along the first direction X, that is, each battery module 20 is supported on two adjacent protrusions 131, such that the groove formed between each pair of adjacent protrusions 131 is located at the middle position of the bottom of the corresponding battery module 20, thereby making two adjacent battery modules 20, the frame 11, and the corresponding protrusions 131 together enclose the aforementioned filling cavity a4. Thus, by setting multiple protrusions 131 on the base plate 13, the battery module 20 fits more tightly with the surface of the corresponding protrusion 131, which helps to improve the sealing of the filling cavity a4.

[0046] Furthermore, each protrusion 131 has an elastic layer (not shown) on its surface facing the battery module 20 along the third direction Z. The battery module 20 is supported on this elastic layer, causing the elastic layer to be compressed and deformed. This allows the elastic layer to seal the gap between the battery module 20 and the protrusion 131, ensuring the sealing of the filling cavity a4 and preventing the thermally conductive adhesive in the filling cavity a4 from entering the gap between the battery module 20 and the protrusion 131. Optionally, the elastic layer can be made of elastic materials such as foam, rubber, or structural adhesive.

[0047] In a specific embodiment, the battery box 10 further includes a crossbeam 15 disposed within the receiving cavity a1. This crossbeam 15 extends along a first direction X and divides the receiving cavity a1 along a second direction Y into a battery compartment a2 and an electrical compartment a3. All the aforementioned battery modules 20 and cooling plates 30 are installed within the battery compartment a2. The electrical compartment a3 is used to house electrical modules such as the BDU (Battery Energy Distribution Unit) and BMS (Battery Management System).

[0048] Please see Figures 7 to 8 As shown, the crossbeam 15 further has multiple first slots 151 that correspond one-to-one with each filling cavity a4. One end of each cooling plate 30 is inserted into the corresponding first slot 151, thereby making the first cooling plate 30 more stable and easier and faster to assemble.

[0049] Furthermore, each first slot 151 is provided with an elastic sealing gasket 16, which has a second slot 161 for the cooling plate 30 to be inserted into. Thus, with the elastic sealing gasket 16 in the first slot 151 and one end of the cooling plate 30 inserted into the second slot 161 of the elastic sealing gasket 16, the gap between the inner wall of the first slot 151 and the cooling plate 30 is sealed by the elastic sealing gasket 16, preventing the thermally conductive adhesive in the filling cavity a4 from leaking from the first slot 151. Optionally, the elastic sealing gasket 16 can be made of elastic materials such as silicone foam or rubber.

[0050] Optionally, the second slot 161 includes a guide section 1611 and a clamping section 1613 arranged sequentially along the third direction Z. The guide section 1611 has an opening facing the top plate. The cooling plate 30 is inserted into the clamping section 1613 of the second slot 161 through the opening of the guide section 1611 and is interference-fitted into the clamping section 1613, so that the cooling plate 30 compresses the elastic sealing gasket 16. This ensures a better sealing effect of the elastic sealing gasket 16 and allows the cooling plate 30 to be more securely mounted on the crossbeam 15.

[0051] Furthermore, the width of the guide section 1611 of the second slot 161 gradually decreases from the end with the opening to the end facing the clamping section 1613, and the width of the opening of the guide section 1611 is greater than the thickness of the cooling plate 30. Thus, because the opening of the guide section 1611 is relatively wide, it is convenient to insert the cooling plate 30 through the opening of the guide section 1611, and under the guidance of the guide section 1611, continue to insert it into the clamping section 1613 of the second slot 161, thereby allowing the cooling plate 30 to be interference-fitted into the clamping section 1613 of the second slot 161.

[0052] Specifically, in the embodiment, a reinforcing member 153 is provided on the side of the crossbeam 15 facing the electrical compartment a3 (see...). Figure 2 The reinforcing member 153 is fixedly connected to the crossbeam 15 and the base plate 13. Thus, by using the reinforcing member 153 to strengthen the crossbeam 15 and the base plate 13, the structural stability of the battery box 10 is improved. Furthermore, multiple reinforcing members 153 are provided, and these multiple reinforcing members 153 are spaced apart along the length direction of the crossbeam 15 (i.e., the first direction X), thereby improving the strengthening effect.

[0053] Please see Figure 2 As shown, in a specific embodiment, the frame 11 includes a first frame b1, a second frame b2, a third frame b3, and a fourth frame b4. The first frame b1 and the third frame b3 are arranged opposite each other in the first direction X, and the second frame b2 and the fourth frame b4 are arranged opposite each other in the second direction Y. The first frame b1, the second frame b2, the third frame b3, and the fourth frame b4 are connected end to end in sequence. The first frame b1, the second frame b2, the third frame b3, the fourth frame b4, the top plate, and the bottom plate 13 together enclose the aforementioned receiving cavity a1. The length direction of the aforementioned crossbeam 15 is consistent with the first direction X, and the two ends of the crossbeam 15 are respectively fixedly connected to the first frame b1 and the third frame b3. The first frame b1, the crossbeam 15, the third frame b3, the fourth frame b4, the top plate, and the bottom plate 13 together enclose the aforementioned battery compartment a2, and the first frame b1, the second frame b2, the third frame b3, the crossbeam 15, the top plate, and the bottom plate 13 together enclose the aforementioned electrical compartment a3. Specifically, one end of each cooling plate 30 is connected to the fourth frame b4, and the other end is inserted into the second slot 161 of the elastic sealing gasket 16 on the crossbeam 15.

[0054] In a specific embodiment, the top plate has cooling channels for the flow of cooling medium, thereby cooling the side of each battery module 20 facing the top plate and further improving the thermal management performance of the battery. Optionally, the top plate can be a profile plate, using the cavity within the profile plate as a cooling channel.

[0055] Optionally, a heat-conducting layer can be provided between the top plate and each battery module 20. This allows the top plate to indirectly contact each battery module 20 through the heat-conducting layer, enabling heat exchange and cooling of the battery modules 20. It is understood that the heat-conducting layer can be made of a material with good thermal conductivity, and no special limitations are imposed here.

[0056] It should be noted that in this embodiment, the top plate and the liquid cooling plate are integrated into one unit. This reduces the number of battery components and simplifies the assembly process. Furthermore, it reduces the space required within the housing cavity a1, which is beneficial for improving the volumetric energy density of the battery. Of course, in other embodiments, the top plate and the liquid cooling plate can also be separate units. That is, a liquid cooling plate can be placed between the top plate and each battery module 20, using this liquid cooling plate to cool the side of each battery module 20 facing the top plate.

[0057] In a specific embodiment, the base plate 13 has cooling channels for the flow of cooling medium, thereby cooling the side of each battery module 20 facing the base plate 13 and further improving the thermal management performance of the battery. Optionally, the base plate 13 can be a profile plate, using the cavity within the profile plate as a cooling channel and the exhaust channel described below.

[0058] It should be noted that in this embodiment, the base plate 13 and the liquid cooling plate are integrated into one unit. This reduces the number of battery components and simplifies the assembly process. Furthermore, it reduces the space required within the housing cavity a1, which is beneficial for improving the volumetric energy density of the battery. Of course, in other embodiments, the base plate 13 and the liquid cooling plate can also be separate units. That is, a liquid cooling plate can be placed between the base plate 13 and each battery module 20, using this liquid cooling plate to cool the side of each battery module 20 facing the base plate 13.

[0059] In a specific embodiment, each battery module 20 further includes multiple elastic spacers, with an elastic spacer disposed between each pair of adjacent battery cells 21. Each battery module 20 is arranged between the crossbeam 15 and the fourth frame b4, and the fourth frame b4 and the crossbeam 15 together press against the battery module 20 between them along the second direction Y, so that each elastic spacer is compressed and undergoes elastic deformation, thereby pressing and fixing each battery cell 21 of the battery module 20. It should be noted that the elastic spacers can be made of elastic materials such as rubber, and are not limited here.

[0060] In a specific embodiment, the battery box 10 further includes a longitudinal beam 40 disposed within the receiving cavity a1, thereby enhancing the structural strength of the battery box 10. The longitudinal beam 40 is located in the filling cavity a4 between any two adjacent battery modules 20. For ease of description, these two battery modules 20 are respectively named the first battery module 20 and the second battery module 20. The cooling plate 30 between the first battery module 20 and the second battery module 20 is integrated with the longitudinal beam 40, meaning that the longitudinal beam 40 has internal channels for the flow of cooling medium, allowing it to also cool adjacent busbars 22. Thus, compared to a separate arrangement of the longitudinal beam 40 and the cooling plate 30, the required space is significantly reduced, which is beneficial for improving the volumetric energy density of the battery.

[0061] Please continue reading Figure 4 As shown in the embodiment, each battery module 20 further includes a data acquisition circuit board 23 and multiple connectors 24. The data acquisition circuit board 23 is disposed on one side of each battery cell 21 along the third direction Z. The data acquisition circuit board 23 is electrically connected to multiple busbars 22 via the connectors 24, thereby enabling the data acquisition circuit board 23 to acquire information such as temperature, voltage, or current of each busbar 22 through the connectors 24, and transmit the acquired information to the BDU and / or BMS. Optionally, each battery module 20 has two data acquisition circuit boards 23, which are disposed on the same side of each battery cell 21 in the third direction Z, and are spaced apart along the first direction X. Each busbar 22 located on the same side of the battery module 20 is electrically connected to the corresponding data acquisition circuit board 23 via the connectors 24. In other words, each busbar 22 located on the same side of the battery module 20 is electrically connected to a data acquisition circuit board 23 through multiple connectors 24, and each busbar 22 located on the other side of the battery module 20 is electrically connected to another data acquisition circuit board 23 through multiple connectors 24.

[0062] Specifically, in each battery module 20, each battery cell 21 also has an explosion-proof valve (not shown), which, along with the data acquisition circuit board 23, is located on opposite sides of the battery cell 21 in the third direction Z. Thus, the data acquisition circuit board 23 and each busbar 22 are arranged on different sides of the battery module 20, achieving high-voltage and low-voltage separation and avoiding interference with the data acquisition circuit board 23. The explosion-proof valve and each busbar 22 being located on different sides of the battery module 20 also achieve thermal and electrical separation.

[0063] Furthermore, the acquisition circuit board 23 is arranged on the side of the battery module 20 facing the top plate, thereby utilizing the top plate to cool the acquisition circuit board 23. The explosion-proof valves of each battery cell 21 are located on the side of the battery module 20 facing the bottom plate 13. The bottom plate 13 also has an exhaust channel, and the side of the bottom plate 13 facing each battery cell 21 has multiple air inlets communicating with the exhaust channel. Each air inlet corresponds to an explosion-proof valve on each battery cell 21, so that when any battery cell 21 experiences thermal runaway and its explosion-proof valve activates to release pressure, the high-temperature, high-pressure gas inside that battery cell 21 is discharged from its own explosion-proof valve and enters the exhaust channel within the bottom plate 13 through the corresponding air inlet, and is then discharged to the outside of the battery. It should be noted that the cooling channels and exhaust channels within the bottom plate 13 are independent of each other and are not interconnected, ensuring that the cooling medium does not leak from the exhaust channels.

[0064] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0065] The embodiments described above are merely illustrative of several implementation methods of this application, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the protection scope of this application. Therefore, the protection scope of this patent application should be determined by the appended claims.

Claims

1. A battery, characterized in that, include: The battery box (10) has a receiving cavity (a1); Multiple battery modules (20) are arranged in the receiving cavity (a1) along a first direction (X), where the first direction (X) is the width direction of the battery box (10). A filling cavity (a4) is formed between each two adjacent battery modules (20) and between the side wall of the receiving cavity (a1) along the first direction (X) and the battery module (20). Multiple cooling plates (30) are respectively disposed in each of the filling cavities (a4) along a third direction (Z), and each cooling plate (30) is spaced apart from the adjacent battery module (20), wherein the third direction (Z) is the height direction of the battery box (10); and Thermally conductive adhesive is filled into each of the filling cavities (a4).

2. The battery according to claim 1, characterized in that, Each battery module (20) includes multiple battery cells (21) and multiple busbars (22). The multiple battery cells (21) are stacked along a second direction (Y), which is the length direction of the battery box (10). Each battery cell (21) has a terminal post (211) on both sides along the first direction (X). The terminal posts (211) of each two adjacent battery cells (21) on the same side are electrically connected through the busbars (22). Each cooling plate (30) has a preset interval distance with the busbars (22) of the adjacent battery module (20). The preset interval distance is greater than or equal to 1 mm and less than or equal to 3 times the thickness of the cooling plate (30).

3. The battery according to claim 2, characterized in that, Each of the battery modules (20) further includes multiple elastic spacers. Each pair of adjacent battery cells (21) is provided with an elastic spacer. The inner wall of the battery box (10) presses against the battery module (20) along the second direction (Y) so that each of the elastic spacers is pressed and undergoes elastic deformation.

4. The battery according to claim 2, characterized in that, Each of the battery modules (20) further includes a data acquisition circuit board (23) and a plurality of connectors (24). The data acquisition circuit board (23) is disposed on one side of each of the battery cells (21) along the third direction (Z). The data acquisition circuit board (23) is electrically connected to a plurality of busbars (22) through the connectors (24).

5. The battery according to claim 1, characterized in that, The battery box (10) includes a frame (11) and a top plate and a bottom plate (13) respectively covering the two sides of the frame (11) along the third direction (Z). The frame (11), the top plate and the bottom plate (13) together enclose the receiving cavity (a1). The bottom plate (13) has a plurality of protrusions (131) protruding on one side facing the receiving cavity (a1). The plurality of protrusions (131) are spaced apart along the first direction (X). Each battery module (20) abuts against the protrusions (131) on both sides of its bottom along the first direction (X).

6. The battery according to claim 5, characterized in that, The protrusion (131) has an elastic layer on the side facing the battery module (20) along the third direction (Z).

7. The battery according to claim 5, characterized in that, The battery box (10) further includes a crossbeam (15) disposed within the receiving cavity (a1), the crossbeam (15) extending along the first direction (X), and the crossbeam (15) dividing the receiving cavity (a1) along the second direction (Y) into a battery compartment (a2) and an electrical compartment (a3), the second direction (Y) being the length direction of the battery box (10); a plurality of battery modules (20) are installed in the battery compartment (a2); The crossbeam (15) has a plurality of first slots (151) corresponding to each of the filling cavities (a4), and one end of each cooling plate (30) is inserted into the corresponding first slot (151).

8. The battery according to claim 7, characterized in that, Each of the first slots (151) is provided with an elastic sealing gasket (16), the elastic sealing gasket (16) having a second slot (161) for the cooling plate (30) to be inserted into.

9. The battery according to claim 8, characterized in that, The second slot (161) includes a guide section (1611) and a clamping section (1613) arranged sequentially along the third direction (Z), the guide section (1611) having an opening toward the top plate, and the cooling plate (30) being inserted through the opening of the guide section (1611) and interference-fitted into the clamping section (1613). The width of the guide section (1611) gradually decreases from the end with the opening to the end facing the clamping section (1613), and the width of the opening of the guide section (1611) is greater than the thickness of the cooling plate (30).

10. An electrical device, characterized in that, Includes the battery as described in any one of claims 1 to 9.

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