Battery module, battery pack and vehicle

Abstract

The utility model discloses a battery module, a battery pack and a vehicle. The battery module comprises a plurality of single batteries, a busbar and a heat management assembly, the single batteries are sequentially arranged along a first direction, and a pole is arranged on a first wall of each single battery; the busbars are connected with the pole columns so as to realize electric connection of the single batteries; the heat management assembly is arranged on one side, far away from the single battery, of the busbar and is connected with the busbar to realize heat exchange; in the projection in the height direction of the single battery, the busbar and the heat management assembly have a first projection area, the pole and the heat management assembly have a second projection area, and the first projection area and the second projection area are at least partially overlapped. According to the battery module, the battery cell can be cooled through the pole, and the temperature difference between the internal temperature and the external temperature of the battery cell is small through the cooling mode.

Description

Technical Field

[0001] The utility model relates to the technical field of batteries, and in particular to a battery module, a battery pack and a vehicle. Background Art

[0002] The battery pack contains multiple single cells, and each single cell will generate heat during charging and discharging. If the heat is not dissipated in time, it will affect the charging and discharging performance and service life of the single cell, and even cause safety accidents such as spontaneous combustion.

[0003] In the prior art, a liquid cooling plate is provided on the large surface of a single cell to dissipate heat and cool the single cell. However, since the heat diffusion speed of the battery cell is inversely proportional to the distance from the battery cell to the liquid cooling plate, the greater the distance from the battery cell to the liquid cooling plate, the slower the heat diffusion and the higher the temperature. As a result, the temperature gradually increases from the outside to the inside of the battery cell. When the temperature difference between the inside and outside of the battery cell is large, it will seriously affect the performance, life and safety of the battery cell. Utility Model Content

[0004] The utility model aims to solve at least one of the technical problems existing in the prior art. To this end, the utility model proposes a battery module that can dissipate heat to the battery cell through the pole, and the temperature difference between the inside and outside of the battery cell is small in this heat dissipation method.

[0005] The utility model also provides a battery pack having the battery module.

[0006] The utility model also provides a vehicle with the battery pack.

[0007] A battery module according to a first embodiment of the present invention includes:

[0008] A plurality of single cells, the single cells are arranged in sequence along a first direction, each of the single cells comprises a first wall, and a pole is arranged on the first wall;

[0009] A busbar connected to the pole to achieve electrical connection between the single cells;

[0010] A thermal management component, which is disposed on a side of the busbar away from the single battery and connected to the busbar to achieve heat exchange;

[0011] Among them, along the projection in the height direction of the single battery, the busbar has a first projection area on the thermal management component, and the pole has a second projection area on the thermal management component, and the first projection area and the second projection area at least partially overlap.

[0012] The battery module according to the embodiment of the utility model has at least the following beneficial effects:

[0013] Since the current collector of the battery cell pole piece is made of metal, it has good thermal conductivity, and the bus is also made of metal material, which also has good thermal conductivity. Therefore, the heat generated inside the battery cell when it is working can be quickly diffused through the current collector, pole ear, pole column, bus, and thermal management component in sequence. This heat dissipation method can guide the heat generated inside the battery cell, reduce the temperature difference between the inside and outside of the battery cell, and is conducive to achieving balanced control of the overall temperature of the battery cell, thereby avoiding the problem of battery capacity attenuation and reduced service life caused by excessive temperature difference between the inside and outside of the battery cell.

[0014] According to some embodiments of the present invention, the second projection area falls within the first projection area.

[0015] According to some embodiments of the present invention, the thermal management component includes a current collector and a plurality of heat conductive members, the heat conductive members extend along the first direction and are connected to the bus, and the current collector is arranged at an end of the heat conductive member and is connected to the heat conductive member.

[0016] According to some embodiments of the utility model, the thermal management component includes a plurality of heat conductive members, which extend along the first direction and are connected to the bus; wherein the heat conductive members are made of insulating material; or, an insulating layer made of insulating material is provided between the heat conductive members and the bus.

[0017] According to some embodiments of the present invention, the thermal conductivity λ of the heat conducting element is 0.5-1.5 W / m·K, the wall thickness H of the heat conducting element is 0.3-0.8 mm, and the thermal conductivity λ and the wall thickness H have the following relationship: 0.5≤λ / H≤4.

[0018] According to some embodiments of the present invention, the heat conducting member defines a plurality of first channels extending in parallel along the first direction, and at least some of the first channels are used for circulating heat exchange medium; wherein the flow direction of the heat exchange medium in each of the first channels through which the heat exchange medium circulates is the same or different.

[0019] A battery pack according to a second embodiment of the present invention includes:

[0020] A box body, wherein the box body defines a containing cavity;

[0021] A plurality of battery modules as described in any one of the above embodiments, each of the battery modules is disposed in the accommodating cavity and arranged in sequence along a second direction, and the second direction is compared to the first direction.

[0022] According to some embodiments of the utility model, an explosion-proof valve is also provided on the first wall of the single cell, and the battery pack also includes a protective member, which defines an exhaust channel. The protective member is connected to the first wall, and corresponding to the position of the explosion-proof valve, the protective member is provided with a first through hole to connect the explosion-proof valve with the exhaust channel.

[0023] According to some embodiments of the utility model, an explosion-proof valve is further provided on the first wall of the single cell, the battery pack also includes a protective member, the protective member defines an exhaust groove, the protective member is connected to the first wall so that the groove wall of the exhaust groove and the first wall define an exhaust channel, the explosion-proof valve is provided on the inner wall of the exhaust channel, and the pole is located outside the exhaust channel.

[0024] According to some embodiments of the utility model, the protective member includes a main body portion defining the exhaust groove and abutment protrusions located on both sides of the main body portion, the abutment protrusions are connected to the first wall at a position between the pole and the explosion-proof valve on the corresponding side, and a shock-absorbing groove is provided on the side of the abutment protrusion away from the first wall.

[0025] According to some embodiments of the present invention, the battery pack further includes a liquid cooling plate, which is disposed between two adjacent single cells and attached to a large surface of the single cells.

[0026] According to some embodiments of the present invention, the box body includes a bottom plate and a top plate, and the single battery includes a first wall, and the first wall is provided with a pole and an explosion-proof valve, wherein the first wall is arranged close to the bottom plate.

[0027] According to some embodiments of the present invention, the box body includes a bottom plate and a top plate, the single battery includes a second wall, the second wall is provided with an explosion-proof valve, wherein the second wall is arranged close to the bottom plate.

[0028] A vehicle according to a third aspect of the present utility model includes:

[0029] A vehicle frame body, wherein the vehicle frame body defines a passenger compartment and a battery compartment;

[0030] The battery pack according to any one of the above embodiments, wherein the battery pack is disposed in the battery compartment;

[0031] The battery pack includes a box body, the box body includes a top plate and a bottom plate, and the top plate is arranged close to the passenger cabin.

[0032] Additional aspects and advantages of the present invention will be given in part in the following description, and in part will become apparent from the following description, or will be learned through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] The present invention is further described below with reference to the accompanying drawings and embodiments, wherein:

[0034] Figure 1 This is an exploded schematic diagram of a battery module according to an embodiment of the present utility model;

[0035] Figure 2 It is a partially enlarged schematic diagram of a side view of a battery module according to an embodiment of the utility model;

[0036] Figure 3 It is a partially enlarged schematic cross-sectional view of a battery module according to an embodiment of the present utility model;

[0037] Figure 4 This is an exploded schematic diagram of a battery pack according to an embodiment of the present utility model;

[0038] Figure 5 A cross-sectional view of a battery pack according to an embodiment of the present utility model;

[0039] Figure 6 for Figure 5 A magnified schematic diagram of the middle A area;

[0040] Figure 7 for Figure 6 A schematic structural diagram of another embodiment of the middle protective member.

[0041] Reference numerals:

[0042] Single battery 100; first wall 110; pole 111; explosion-proof valve 112;

[0043] Busbar 200; Connector 210;

[0044] Thermal management component 300; heat conducting member 310; rib partition 311; first channel 312; current collecting member 320; flow dividing member 330;

[0045] Box body 400; bottom plate 410; top plate 420; frame 430;

[0046] Protective element 500 ; exhaust channel 510 ; first through hole 511 ; heat conduction channel 520 ; abutting protrusion 530 ; shock absorbing groove 531 ; main body 540 . DETAILED DESCRIPTION

[0047] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0048] In the description of the present invention, it should be understood that descriptions involving orientation, such as up, down, front, back, left, right, etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0049] In the description of the present utility model, "several" means more than one, "many" means more than two, "greater than", "less than", "exceed" etc. are understood to exclude the number itself, and "above", "below", "within" etc. are understood to include the number itself. If there is a description of "first" or "second", it is only used to distinguish the technical features, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features or implicitly indicating the order of the indicated technical features.

[0050] In the description of the present invention, unless otherwise clearly defined, terms such as setting, installing, connecting, etc. should be understood in a broad sense, and technicians in the relevant technical field can reasonably determine the specific meanings of the above terms in the present invention based on the specific content of the technical solution.

[0051] In the description of the utility model, the description with reference to the terms "one embodiment", "some embodiments", "illustrative embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0052] In the prior art, a liquid cooling plate is provided on the large surface of a single cell to dissipate heat and cool the single cell. However, since the heat exchange between the battery cell and the liquid cooling plate is affected by the heat transfer path, the heat generated inside the battery needs to be diffused outward through heat conduction and then exchange heat with the liquid cooling plate. As a result, the temperature gradually increases from the outside to the inside of the battery cell. When the temperature difference between the inside and outside of the battery cell is large, it will seriously affect the performance, life and safety of the battery cell.

[0053] In order to solve the above problems and effectively reduce the temperature difference between the inside and outside of the battery cell, the first embodiment of the present application proposes a battery module, which includes a plurality of single cells 100, a bus bar 200 and a thermal management component 300, such as Figure 1As shown, the single cells 100 are arranged in sequence along the first direction, and a pole 111 is arranged on the first wall 110 of each single cell 100. It should be noted that the shell of the single cell 100 has a cavity inside, and an electrode assembly is arranged in the cavity and filled with electrolyte. The electrode assembly is a component in which an electrochemical reaction occurs in the single cell 100. The shell of the battery may contain one or more electrode assemblies, and the electrode assembly is mainly formed by winding or stacking a positive electrode sheet and a negative electrode sheet, and a separator is usually arranged between the positive electrode sheet and the negative electrode sheet. There are positive and negative ears on the battery cell, and the positive ear is connected to the current collector of the positive electrode sheet, and the negative ear is connected to the current collector of the negative electrode sheet. The positive ear of the battery cell is connected to the positive pole post on the first wall 110, and the negative ear is connected to the negative pole post on the first wall 110.

[0054] The busbar 200 is connected to the first wall 110, wherein the busbar 200 is connected to the poles 111 of different single cells 100 to achieve electrical connection between the single cells 100. It should be explained that the busbar 200 is made of metal and can conduct electricity. The busbar 200 can also be connected to the poles 111 on adjacent single cells 100 to achieve series connection, parallel connection, or mixed connection of multiple single cells in the same battery module or in two adjacent battery modules. Figure 1 In the embodiment shown, the busbar 200 includes a plurality of connectors 210, and the two ends of the connector 210 are respectively connected to the positive pole and the negative pole of two adjacent single cells 100, so that the two adjacent single cells 100 are connected in series. The multiple connectors 210 are used to connect the single cells 100 in series in sequence, thereby obtaining a higher voltage value.

[0055] The thermal management component 300 is arranged on the side of the bus 200 away from the single cell 100, and is connected to the bus 200 to achieve heat exchange. It should be noted that since the current collector of the battery cell pole piece is made of metal and has good thermal conductivity, the bus 200 is also made of metal material and also has good thermal conductivity. As a result, the heat generated inside the battery cell when it is working can be quickly diffused through the current collector, the pole ear, the pole 111, the bus 200, and the thermal management component 300 in sequence. This heat dissipation method can conduct the heat generated inside the battery cell, reduce the temperature difference between the inside and outside of the battery cell, and is conducive to achieving balanced control of the overall temperature of the battery cell, thereby avoiding the problem of battery capacity attenuation and reduced service life caused by excessive temperature difference between the inside and outside of the battery cell.

[0056] Furthermore, in the embodiment of the present application, with the thermal management assembly 300 as the projection surface, along the projection of the height direction of the single battery 100, the busbar 200 has a first projection area on the thermal management assembly 300, and the pole 111 has a second projection area on the thermal management assembly 300. The first projection area and the second projection area partially overlap, so that the heat conduction distance from the thermal management assembly 300 to the pole 111 is shorter, and the heat dissipation efficiency of the thermal management assembly 300 to the pole 111 is higher.

[0057] For further reference, Figure 2 As shown, the second projection area falls within the first projection area, that is, the projection along the vertical direction on the horizontal plane, the projection area of ​​the pole 111 falls within the projection area of ​​the thermal management component 300. The thermal management component 300 is at a relatively low temperature, and the pole 111 is at a relatively high temperature. Heat is spontaneously transferred from the high-temperature object to the low-temperature object, so that the heat passes directly from the pole 111 through the bus 200 and is absorbed by the thermal management component 300.

[0058] In some embodiments, the thermal management assembly 300 includes a current collector 320 and a plurality of heat conducting members 310, such as Figure 1 As shown, after the individual cells 100 are arranged in sequence along the first direction, their poles 111 are arranged in two rows, and correspondingly, the thermal management assembly 300 includes two heat conductive members 310, which extend along the first direction and are connected to the busbar 200. The current collector 320 is arranged at the end of the heat conductive member 310 and extends perpendicularly to the first direction to connect multiple heat conductive members 310 respectively.

[0059] It should be explained that the current collector 320 is not directly connected to the bus bar 200, and the current collector 320 serves to collect the heat of each heat conducting member 310. Figure 1 As shown, the thermal management component 300 dissipates heat through liquid cooling, and the liquid passage in the current collector 320 is connected to the liquid passage in the heat conducting member 310, so that the cooling liquid is collected by the heat conducting member 310 in the current collector 320 and then discharged uniformly. Figure 1 In the illustrated embodiment, the thermal management component 300 further includes a diverter 330. The diverter 330 and the current collecting member 320 are respectively located at the two ends of the heat conductive member 310. The diverter 330 is respectively connected to each heat conductive member 310 for supplying low-temperature coolant to each heat conductive member 310. After the coolant flows through the heat conductive member 310, it absorbs heat and becomes high-temperature coolant, which is collected in the current collecting member 320 and discharged.

[0060] Furthermore, the heat conductor 310 is made of insulating materials such as ABS, PA, and PP, so that the heat conductor 310 can be insulated from the busbar 200 to avoid short circuit of the single battery 100 after the heat conductor 310 and the busbar 200 are connected. Alternatively, the heat conductor 310 can be a metal conductive material, and an insulating layer made of an insulating material is provided between the heat conductor 310 and the busbar 200 to insulate the heat conductor 310 and the busbar 200.

[0061] Furthermore, a material with a thermal conductivity λ in the range of 0.5-1.5 W / m·K is selected to make the heat conducting member 310, and the wall thickness H of the heat conducting member 310 is limited to the range of 0.3-0.8 mm. To facilitate understanding of the role of the above numerical range, the temperature of each pole 111 in the battery module is monitored under the condition of conventional fast charging of the battery module at 25°C, and the data in the following table are obtained.

[0062]

[0063]

[0064] As shown in the table above, with Example 1 and Example 2 as the same control group, Examples 3 to 6 as the same control group, Examples 7 to 10 as the same control group, and Examples 11, 12 and Example 13 as the same control group, it can be found that under the same wall thickness, the higher the thermal conductivity of the material of the heat conductive member 310, the greater the global temperature difference in the battery module, but the maximum temperature and the minimum temperature are reduced to varying degrees. For example, if the thermal conductivity of the heat conductive member 310 is good, at the liquid inlet end of the heat conductive member 310, since the temperature difference between the heat conductive member 310 and the pole 111 is large at this time, the pole 111 can be cooled to a large extent. On the contrary, at the liquid outlet end of the heat conductive member 310, since the cooling liquid in the heat conductive member 310 absorbs heat and heats up, the temperature difference between the heat conductive member 310 and the pole 111 decreases, so that the temperature drop of the pole 111 also decreases, resulting in a large temperature difference between the single battery 100 corresponding to the liquid inlet end and the liquid outlet end of the heat conductive member 310.

[0065] Taking Examples 1, 7, and 11 as the same control group, Examples 2, 5, and 9 as the same control group, Examples 4 and 8 as the same control group, and Examples 6, 10, 12 and 14 as the same control group, it can be found that when the thermal conductivity of the heat conductor 310 is the same, the thicker the wall thickness of the heat conductor 310, the smaller the global temperature difference in the battery module, but due to the poor cooling effect, the maximum temperature and the minimum temperature both increase to varying degrees.

[0066] It is understandable that for a single cell 100, the higher the temperature during charging and discharging, the shorter the battery life. For the entire battery module, the greater the temperature difference between the individual cells 100 in the battery module, the greater the difference in the service life of the individual cells 100, which in turn affects the service life and use effect of the entire battery module. To this end, it is necessary to balance the relationship between the thermal conductivity and wall thickness of the heat conductor 310 so that while ensuring that the temperature at each point in the battery module is low, the global temperature difference of the battery module is not too large. Therefore, it is further required that the thermal conductivity λ and the wall thickness H have the following relationship: 0.5≤λ / H≤4.

[0067] In some embodiments, the heat conductor 310 achieves heat transfer through the thermal conductivity of its own material. For example, the heat conductor 310 is made of a metal material with good thermal conductivity, and then can absorb the heat on the pole 111 and transfer it to the relatively low-temperature current collector 320 through the heat conductor 310. Alternatively, in other embodiments, the heat conductor 310 achieves heat transfer through the internal heat exchange medium, and the heat conductor 310 plays a role in connecting and conducting heat between the heat exchange medium and the bus 200. Figure 3 As shown, the heat conducting member 310 defines a plurality of first channels 312 extending in parallel along a first direction, and the interior of the heat conducting member 310 defines a cavity, in which a rib partition 311 is provided. The rib partition 311 can enhance the structural strength of the heat conducting member 310 on the one hand, and divide the cavity into a plurality of first channels 312 that are not connected to each other on the other hand. At least part of the first channels 312 is used to circulate heat exchange medium, and in some embodiments, part of the first channels 312 is blocked. It should be understood that the heat exchange medium can be a liquid or a cryogenic gas.

[0068] It should be noted that, in the first channels 312 where the heat exchange medium flows, the flow direction of the heat exchange medium in each first channel 312 can be the same, so that it can flow from the liquid inlet end of the heat conductor 310 to the collecting member 320 located at the liquid outlet end, or, the flow direction of the heat exchange medium in each first channel 312 can be different. It can be understood that the coolant temperature at the liquid inlet end of each first channel 312 is lower and the temperature rise is faster, while the coolant temperature at the liquid outlet end is higher and the temperature rise is slower. Due to the different flow directions in each first channel 312, the liquid inlet end of some first channels 312 is set to correspond to the liquid outlet end of the remaining first channels 312, and the liquid outlet end of some first channels 312 is set to correspond to the liquid inlet end of the remaining first channels 312, so as to balance the temperature rise and the coolant temperature of the liquid inlet and liquid outlet ends, and reduce the global temperature difference of the battery module.

[0069] The second embodiment of the present application proposes a battery pack, such as Figure 4As shown, the battery pack includes a box body 400 and the battery modules mentioned in any of the above embodiments, the box body 400 defines a receiving cavity, each battery module is disposed in the receiving cavity, and arranged in sequence along the second direction, wherein the second direction intersects with the first direction, and preferably, the second direction is perpendicular to the first direction. Figure 4 As shown, the current collecting members 320 of adjacent battery modules may be connected to each other.

[0070] The first wall 110 of the single battery 100 is also provided with an explosion-proof valve 112. When the internal pressure of the battery is too high, the explosion-proof valve 112 opens to release the high-pressure gas in the battery, thereby avoiding accidents such as explosions. Figure 1 In the illustrated embodiment, the explosion-proof valve 112 is disposed between the two poles 111. The battery pack further includes a protective member 500, which defines an exhaust passage 510. The exhaust passage 510 may be defined by the protective member 500 alone, for example, the protective member 500 is injection molded to define the exhaust passage 510 located inside the protective member 500 (not shown in the figure); or, the exhaust passage 510 may be defined by the protective member 500 and the bottom plate 410 together, for example Figure 5 and Figure 6 As shown, a side of the protective member 500 facing away from the first wall 110 defines an exhaust groove, and an exhaust passage 510 is defined when the protective member 500 is connected to the box body 400 .

[0071] The protective member 500 is also provided with a heat conduction groove on one side close to the first wall 110, and the heat conduction groove is provided corresponding to the pole 111 and the heat conduction member 310. When the protective member 500 is connected to the first wall 110, the protective member 500 is provided with a first through hole 511 corresponding to the position of the explosion-proof valve 112, so that the explosion-proof valve 112 is connected to the exhaust channel 510. The heat conduction groove cover is provided on the pole 111 and the heat conduction member 310, and defines a heat conduction channel 520 with the first wall 110, such as Figure 5 and Figure 6 As shown, the pole 111 is located in the heat conduction channel 520 outside the exhaust channel 510, and the heat conduction channel 520 is not connected to the exhaust channel 510. When the explosion-proof valve 112 is opened, the high-pressure gas can be discharged from the exhaust channel 510 to avoid affecting the bus 200, the heat conducting member 310, the pole 111, etc. in the heat conduction channel 520, thereby achieving the separation of the electrical connection area and the heat clearance area.

[0072] In other embodiments, Figure 7As shown, the protective member 500 defines an exhaust groove on one side facing the first wall 110. When the protective member 500 is connected to the first wall 110, the exhaust groove covers the area where the explosion-proof valve 112 is located. The groove wall of the exhaust groove and the first wall 110 define an exhaust channel 510, so that the explosion-proof valve 112 is located on the inner wall of the exhaust channel 510. The groove width of the exhaust groove is smaller than the spacing between the two poles 111, so that the poles 111, the heat conducting member 310, etc. are located outside the exhaust channel 510. In this way, the separation of the electrical connection area and the heat dredging area is also achieved.

[0073] Further, such as Figure 7 As shown, the protective member 500 includes a main body 540 defining an exhaust groove and abutting protrusions 530 located on both sides of the main body 540. The main body 540 and the abutting protrusions 530 on both sides are connected and form an M-shaped structure. The abutting protrusions 530 abut against the first wall 110 at the position between the pole 111 and the explosion-proof valve 112 on the corresponding side, so that after the abutting protrusions 530 are connected to the first wall 110, the electrical connection area and the heat clearance area are separated. It should be noted that a shock absorbing groove 531 is provided on the side of the abutting protrusion 530 away from the first wall 110, that is, as shown in FIG. Figure 7 As shown, the abutting protrusion 530 is a hollow structure. When the battery pack is impacted, the protective member 500 can play a role of buffering and shock absorption to reduce the direct impact on the single battery 100.

[0074] In some embodiments, the battery pack further includes a liquid cooling plate (not shown in the figure), which extends along the second direction and is arranged between two adjacent single cells 100. The liquid cooling plate is attached to the large surface of the single cell 100 to cool the single cell 100. It should be explained that the large surface of the single cell 100 refers to the plane with the largest area. In this embodiment, the large surface of the battery is cooled by the liquid cooling plate and the inside of the battery is cooled by the thermal management component, so as to better achieve the balanced control of the temperature in the battery pack.

[0075] In some embodiments, Figures 4 to 7 As shown, the box body 400 includes a bottom plate 410, a top plate 420 and a frame 430, the single cell 100 includes a first wall 110, the pole 111 and the explosion-proof valve 112 are both arranged on the first wall 110, the second wall of the single cell 100 is connected to the top plate 420 of the box body 400, and the first wall 110 of the single cell 100 is arranged close to the bottom plate 410.

[0076] In other embodiments, the pole 111 and the explosion-proof valve 112 of the single battery 100 are respectively arranged on different walls, for example, the pole 111 is connected to the first wall 110, and the explosion-proof valve 112 is connected to the second wall. The first wall 110 and the second wall can be parallel to each other or adjacent to each other. For the single battery 100 of this structure, the second wall is arranged close to the bottom plate 410 so that the explosion-proof valve 112 is arranged downward.

[0077] The third aspect of the present application proposes a vehicle, which may be a private car, such as a sedan, SUV, MPV or pickup truck. The vehicle may also be an operating vehicle, such as a van, bus, small truck or large trailer. The vehicle includes a frame body and a battery pack, the frame body defines a passenger compartment and a battery compartment, and the battery pack is arranged in the battery compartment to power the electrical equipment in the vehicle and the vehicle's drive system.

[0078] In some embodiments, the battery compartment is located below the passenger compartment, wherein the top plate 420 of the battery pack is arranged close to the passenger compartment, that is, the bottom plate 410 of the battery pack is arranged away from the passenger compartment. Based on the foregoing, the explosion-proof valve 112 is arranged on the wall surface close to the bottom plate 410, so that the explosion-proof valve 112 is arranged away from the passenger compartment to avoid high-pressure gas from spraying into the passenger compartment when the explosion-proof valve 112 is opened and causing harm to the passengers. In an embodiment of the present application, the explosion-proof valve 112 and the pole 111 are both arranged on the first wall 110, and each single battery 100 in the battery pack is arranged inverted, that is, the first wall 110 is arranged away from the passenger compartment, so that the explosion-proof valve 112 of the single battery 100 is arranged downward to avoid high-pressure gas from spraying toward the passenger compartment, thereby improving the safety performance of the vehicle.

[0079] The embodiments of the utility model are described in detail above in conjunction with the accompanying drawings, but the utility model is not limited to the above embodiments. Various changes can be made within the knowledge of ordinary technicians in the relevant technical field without departing from the purpose of the utility model. In addition, the embodiments of the utility model and the features in the embodiments can be combined with each other without conflict.

Claims

1. A battery module, characterized in that: include: A plurality of single cells, the single cells are arranged in sequence along a first direction, each of the single cells comprises a first wall, and a pole is arranged on the first wall; A busbar connected to the pole to achieve electrical connection between the single cells; A thermal management component, which is disposed on a side of the busbar away from the single battery and connected to the busbar to achieve heat exchange; Among them, along the projection in the height direction of the single battery, the busbar has a first projection area on the thermal management component, and the pole has a second projection area on the thermal management component, and the first projection area and the second projection area at least partially overlap.

2. The battery module according to claim 1, characterized in that: The second projection area falls within the first projection area.

3. The battery module according to claim 1, characterized in that: The thermal management assembly includes a current collector and a plurality of heat conductive members. The heat conductive members extend along the first direction and are connected to the busbars. The current collector is disposed at an end of the heat conductive member and is connected to the heat conductive member.

4. The battery module according to claim 1, characterized in that: The thermal management assembly includes a plurality of heat conducting members extending along the first direction and connected to the bus; wherein the heat conducting members are made of insulating material; or an insulating layer made of insulating material is provided between the heat conducting members and the bus.

5. The battery module according to claim 3, characterized in that: The thermal conductivity λ of the heat conducting member is 0.5-1.5 W / m·K, the wall thickness H of the heat conducting member is 0.3-0.8 mm, and the thermal conductivity λ and the wall thickness H have the following relationship: 0.5≤λ / H≤4.

6. The battery module according to claim 3, characterized in that: The heat conducting member defines a plurality of first channels extending in parallel along the first direction, and at least some of the first channels are used for circulating heat exchange medium; wherein the flow direction of the heat exchange medium in each of the first channels through which the heat exchange medium circulates is the same or different.

7. A battery pack, characterized in that: include: A box body, wherein the box body defines a containing cavity; A plurality of battery modules as described in any one of claims 1 to 6, each of the battery modules is disposed in the accommodating cavity and arranged sequentially along a second direction, and the second direction intersects with the first direction.

8. The battery pack according to claim 7, characterized in that: An explosion-proof valve is also arranged on the first wall of the single cell. The battery pack also includes a protective member, which defines an exhaust channel. The protective member is connected to the first wall. Corresponding to the position of the explosion-proof valve, the protective member is provided with a first through hole to connect the explosion-proof valve with the exhaust channel.

9. The battery pack according to claim 7, characterized in that: An explosion-proof valve is also arranged on the first wall of the single cell, and the battery pack also includes a protective member, which defines an exhaust groove. The protective member is connected to the first wall so that the groove wall of the exhaust groove and the first wall define an exhaust channel, the explosion-proof valve is arranged on the inner wall of the exhaust channel, and the pole is located outside the exhaust channel.

10. The battery pack according to claim 9, characterized in that: The protective member includes a main body portion defining the exhaust groove and abutment protrusions located on both sides of the main body portion, the abutment protrusions are connected to the first wall at a position between the pole and the explosion-proof valve on the corresponding side, and a shock-absorbing groove is provided on the side of the abutment protrusion away from the first wall.

11. The battery pack according to any one of claims 7 to 10, characterized in that: The battery pack further comprises a liquid cooling plate, which is arranged between two adjacent single cells and attached to the large surface of the single cells.

12. The battery pack according to claim 7, characterized in that: The box body includes a bottom plate and a top plate, and the single battery includes a first wall, wherein the first wall is provided with a pole and an explosion-proof valve, wherein the first wall is arranged close to the bottom plate.

13. The battery pack according to claim 7, characterized in that: The box body includes a bottom plate and a top plate, and the single battery includes a second wall, and the second wall is provided with an explosion-proof valve, wherein the second wall is arranged close to the bottom plate.

14. A vehicle, characterized in that include: A vehicle frame body, wherein the vehicle frame body defines a passenger compartment and a battery compartment; The battery pack according to any one of claims 7 to 13, wherein the battery pack is disposed in the battery compartment; The battery pack includes a box body, the box body includes a top plate and a bottom plate, and the top plate is arranged close to the passenger cabin.

Images