Battery pack and vehicle

Abstract

The utility model discloses a battery pack and a vehicle, the battery pack comprises a battery pack and a battery disconnection unit, the battery pack comprises a first battery pack and a second battery pack, the first battery pack and the second battery pack are arranged in parallel along a first direction, and each of the first battery pack and the second battery pack comprises two battery unit layers which are arranged in a stacked manner; each battery unit layer is provided with a plurality of battery units, the plurality of battery units are arranged along a second direction, the first direction is perpendicular to the second direction, the plurality of battery units of the same battery unit layer are connected in series, the two battery unit layers of the first battery pack are connected in series, and the two battery unit layers of the second battery pack are connected in series; the battery disconnecting unit is arranged on one end face of the battery pack and electrically connected with the first battery pack and the second battery pack. According to the battery pack and the vehicle provided by the embodiment of the invention, the current deviation between the battery units is avoided, so that the rear-drive high-voltage risk is reduced.

Description

Technical Field

[0001] The present application relates to the technical field of battery structures, and more specifically, to a battery pack and a vehicle. Background Art

[0002] With the continuous enhancement of people's environmental awareness, pure electric vehicle technology has developed rapidly in recent years. As the main power component of electric vehicles, battery packs play a key role in the long-term stable operation of electric vehicles. In the relevant technology, in order to increase its capacity, battery packs generally stack two or more layers of battery cells. During the assembly of the battery pack, it is easy to have gaps or misalignments between the stacked battery cells, so that during the charging or discharging process of the battery pack, due to the gaps or misalignments between the battery cells, the current may be unevenly distributed, resulting in the risk of high voltage in the rear drive, thereby causing local overheating or thermal runaway, and even causing the entire battery pack to catch fire or explode. Utility Model Content

[0003] Embodiments of the present application provide a battery pack and a vehicle having such a battery pack.

[0004] A battery pack according to an embodiment of the present application is used for a vehicle, comprising:

[0005] A battery pack, the battery pack comprising a first battery pack and a second battery pack, the first battery pack and the second battery pack are arranged in parallel along a first direction, the first battery pack and the second battery pack each comprise two battery cell layers arranged in a stacked manner, each battery cell layer comprises a plurality of battery cells, the plurality of battery cells are arranged along a second direction, the first direction is perpendicular to the second direction, the plurality of battery cells in the same battery cell layer are connected in series, the two battery cell layers of the first battery pack are connected in series, and the two battery cell layers of the second battery pack are connected in series;

[0006] A battery disconnect unit is arranged on one end surface of the battery pack, and the battery disconnect unit is electrically connected to the first battery pack and the second battery pack respectively.

[0007] In some embodiments, the two battery cell layers of the first battery group are connected in series via a first conductive bar, and the first conductive bar is located at an end of the first battery group away from the battery disconnect unit.

[0008] In some embodiments, the first battery pack has a first input stage and a first output stage, the second battery pack has a second input stage and a second output stage, the first input stage and the second output stage are electrically connected, and the first output stage and the second input stage are connected to the battery disconnect unit.

[0009] In some embodiments, the length direction of the battery disconnect unit is arranged along the first direction.

[0010] In some embodiments, a length direction of the battery cell is parallel to the first direction.

[0011] In some embodiments, a cold plate is disposed between two battery cell layers of the first battery pack.

[0012] In some embodiments, the cold plate is composed of a metal plate and a polyimide film.

[0013] In some embodiments, the battery cell is provided with a vent structure, the vent structure is located on at least one end surface of the battery pack, and the battery disconnect unit is located on a different end surface from the vent structure.

[0014] In certain embodiments, the battery disconnect unit is located on a surface of the battery pack adjacent to a surface on which the vent structure is located.

[0015] In some embodiments, each of the battery cells includes a plurality of exhaust structures, and the plurality of exhaust structures are respectively located on two end surfaces of the battery cell that are perpendicular to the first direction.

[0016] In some embodiments, the battery pack further includes a protective cover, wherein the protective cover is disposed on the exhaust structure.

[0017] In some embodiments, the protection cover is installed on an end surface of the first battery group close to the second battery group and / or an end surface of the second battery group close to the first battery group.

[0018] In some embodiments, the battery pack further includes a second conductive bar, and the battery group is electrically connected to the battery disconnect unit via the second conductive bar.

[0019] An embodiment of the present application provides a vehicle, comprising a battery pack as described in any one of the above items.

[0020] The embodiment of the present application provides a battery pack and a vehicle, wherein a plurality of battery cells located in the same battery cell layer are connected in series, and then two battery cell layers of a first battery pack are connected in series, and two battery cell layers of a second battery pack are connected in series. At this time, all battery cells located in the first battery pack are located in the same series circuit, and the currents of the battery cells are equal. Similarly, the currents of the battery cells of the second battery pack are also equal, thereby avoiding the current deviation between the battery cells, thereby reducing the risk of high voltage in the rear drive. At the same time, the total voltage at both ends of the series circuit is equal to the sum of the voltages at both ends of the battery cells, and no battery cell will be overcharged or undercharged, thereby avoiding the problem of power failure. In addition, by arranging the first battery pack and the second battery pack in parallel along the first direction, the number of stacked battery cells is reduced while ensuring a sufficient number of battery cells, effectively avoiding excessive stacking of battery cells, and making it easier for the internal temperature to diffuse outward. In addition, by arranging multiple battery cells upright along the second direction, when the vehicle is started, most of the internal air will flow along the second direction, so that the internal flowing air can be directly blown to the battery cells, effectively improving the heat dissipation effect of the battery cells, and further improving the heat dissipation effect inside the battery pack, thereby effectively reducing the probability of thermal runaway of the battery pack and the battery cells.

[0021] Additional aspects and advantages of the embodiments of the present application will be given in part in the description below, and in part will become apparent from the description below, or will be learned through the practice of the embodiments of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The above and / or additional aspects and advantages of the present application will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0023] Figure 1 is a schematic structural diagram of a battery pack according to an embodiment of the present application;

[0024] Figure 2 This is an implementation method of the present application Figure 1 A magnified view of detail A;

[0025] Figure 3 is a high voltage circuit arrangement diagram of a battery pack according to an embodiment of the present application;

[0026] Figure 4 is a top view of a battery pack according to an embodiment of the present application;

[0027] Figure 5 This is an implementation method of the present application Figure 2 The battery pack is shown in a cross-sectional view along line II-II.

[0028] Description of main component symbols: battery pack 100, battery group 10, first battery group 11, first battery cell layer 111, second battery cell layer 112, first conductive bar 113, second battery group 12, third battery cell layer 121, fourth battery cell layer 122, battery cell 13, connecting piece 131, exhaust structure 132, cold plate 14, protective cover 15, second conductive bar 16, battery disconnect unit 20. DETAILED DESCRIPTION

[0029] The following further describes the embodiments of the present application in conjunction with the accompanying drawings. The same or similar reference numerals in the accompanying drawings represent the same or similar elements or elements with the same or similar functions.

[0030] In addition, the embodiments of the present application described below in conjunction with the drawings are exemplary and are only used to explain the embodiments of the present application and should not be construed as limiting the present application.

[0031] In the present application, unless otherwise clearly specified and limited, a first feature being “above” or “below” a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being “above”, “above”, and “above” a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being “below”, “below”, and “below” a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0032] See also Figure 1 A battery pack 100 according to an embodiment of the present application includes a battery group 10 and a battery disconnect unit 20 .

[0033] The battery pack 10 includes a first battery group 11 and a second battery group 12, which are arranged in parallel along a first direction, and the first battery group 11 and the second battery group 12 each include two stacked battery cell layers, each battery cell layer includes a plurality of battery cells 13, and the plurality of battery cells 13 are arranged along a second direction, the first direction is perpendicular to the second direction, and the plurality of battery cells 13 in the same battery cell layer are connected in series, the two battery cell layers of the first battery group 11 are connected in series, and the two battery cell layers of the second battery group 12 are connected in series; the battery disconnect unit 20 is arranged on one of the end faces of the battery pack 10, and the battery disconnect unit 20 is electrically connected to the first battery group 11 and the second battery group 12, respectively.

[0034] The embodiment of the present application provides a battery pack 100 and a vehicle, wherein a plurality of battery cells 13 located in the same battery cell layer are connected in series, and then two battery cell layers of a first battery pack 11 are connected in series, and two battery cell layers of a second battery pack 12 are connected in series. At this time, all battery cells 13 located in the first battery pack 11 are located in the same series circuit, and the currents of the battery cells 13 are equal. Similarly, the currents of the battery cells 13 of the second battery pack 12 are also equal, thereby avoiding the current deviation between the battery cells 13, thereby reducing the risk of high voltage in the rear drive. At the same time, the total voltage at both ends of the series circuit is equal to the sum of the voltages at both ends of the battery cells 13, and no battery cell 13 will be overcharged or undercharged, thereby avoiding the problem of overcharging or undercharging of the battery cell 13. Safety accidents caused by voltage imbalance. In addition, by arranging the first battery group 11 and the second battery group 12 in parallel along the first direction, the number of stacked layers of the battery cells 13 is reduced while ensuring that the number of battery cells 13 is sufficient, and excessive stacking of the battery cells 13 is effectively avoided, making it easier for the internal temperature to diffuse outward. In addition, the multiple battery cells 13 are arranged upright along the second direction. When the vehicle is started, most of the internal air will flow along the second direction, so that the internal flowing air can be directly blown to the battery cell 13, effectively improving the heat dissipation effect of the battery cell 13, and further improving the heat dissipation effect inside the battery pack 100, thereby effectively reducing the probability of thermal runaway of the battery pack 100 and the battery cell 13.

[0035] The battery pack 100 of the embodiment of the present application can be used in various vehicles such as pure electric vehicles and hybrid vehicles. The following description will only take the battery pack 100 of a pure electric vehicle as an example.

[0036] The battery pack 100 is installed on a vehicle to provide energy for the vehicle, with a direction parallel to the plane of the vehicle and perpendicular to the direction of travel of the vehicle as the first direction, the direction of travel of the vehicle as the second direction, and a direction perpendicular to the first direction and the second direction as the third direction. The battery pack 10 includes a first battery pack 11 and a second battery pack 12 arranged in parallel along the first direction, and the first battery pack 11 and the second battery pack 12 are symmetrically arranged, and the symmetry axes of the first battery pack 11 and the second battery pack 12 are parallel to the second direction. The first battery pack 11 and the second battery pack 12 are spaced apart and form a gap. With this arrangement, when the vehicle is moving, air can flow along the gap, which is beneficial to the heat dissipation inside the battery pack 100.

[0037] See also Figure 1 and Figure 2The first battery group 11 includes a first battery cell layer 111 and a second battery cell layer 112, and the second battery group 12 includes a third battery cell layer 121 and a fourth battery cell layer 122. The first battery cell layer 111, the second battery cell layer 112, the third battery cell layer 121 and the fourth battery cell layer 122 each include a plurality of battery cells 13, the battery cell 13, i.e., a battery monomer, i.e., a battery cell. The battery cell 13 in this embodiment is a short-blade battery cell. The plurality of battery cells 13 of the first battery group 11 and the second battery group 12 are arranged upright along a second direction, and the plane where the battery cells 13 are located is perpendicular to the second direction. With such an arrangement, when the vehicle is moving, the flowing air can be directly blown to the outer surface of the battery cell 13 with the largest area, that is, at this time, the heat dissipation surface of the battery cell 13 blown by the flowing air is the largest, thereby effectively improving the heat dissipation effect of the battery cell 13.

[0038] Furthermore, the first battery cell layer 111 and the second battery cell layer 112 are stacked along a third direction, the first battery cell layer 111 and the second battery cell layer 112 have the same number of battery cells 13, and the first battery cell layer 111 is located above the second battery cell layer 112, and the third battery cell layer 121 and the fourth battery cell layer 122 are stacked along a third direction, the third battery cell layer 121 and the fourth battery cell layer 122 have the same number of battery cells 13, and the third battery cell layer 121 is located above the fourth battery cell layer 122. Such a configuration can effectively improve the space utilization inside the battery pack 100 and accommodate more battery cells 13, thereby effectively improving the performance of the battery pack 100.

[0039] The rear-drive high-voltage risk refers to the risk that during the charging or discharging process of the battery pack 100, due to unreasonable or defective design of the back-end drive circuit, the drive circuit generates excessive voltage or current, thereby causing damage to the battery cell 13 or the entire battery pack 100 or causing a safety accident. During the actual assembly of the battery pack 100, if there are gaps or misalignments between the stacked battery cells 13, it may cause uneven current distribution, thereby causing a risk of high voltage in the rear drive. In this embodiment, all the battery cells 13 of the first battery cell layer 111 are connected in series via a connecting piece 131, and all the battery cells 13 of the second battery cell layer 112 are connected in series via a connecting piece 131, and the first battery cell layer 111 and the second battery cell layer 112 are further connected in series. At this time, all the battery cells 13 of the first battery group 11 are connected in series, and even if there are gaps or misalignments between the battery cells 13, the currents in the series circuit are still equal. Similarly, the connection method of the second battery group 12 is the same as that of the first battery group 11, and the currents of the battery cells 13 of the second battery group 12 are also equal, thereby avoiding current deviation between the battery cells 13 and reducing the risk of high voltage in the rear drive.

[0040] The battery disconnect unit 20 is a battery management unit, which is mainly used to monitor and control the charging and discharging process of the battery. It can monitor the current, voltage, temperature and other parameters of the battery pack 100, control the charging and discharging process of the battery pack 100, and protect the safe operation of the battery pack 100. Specifically, the battery disconnect unit 20 is arranged on one end surface of the battery pack 10.

[0041] See also Figure 1 and Figure 4 In some embodiments, the two battery cell layers of the first battery group 11 are connected in series through the first conductive bar 113, and the first conductive bar 113 is located at one end of the first battery group 11 away from the battery disconnection unit 20. Specifically, the two battery cell layers of the first battery group 11 are connected in series through the first conductive bar 113, the first conductive bar 113 is located on the side of the first battery group 11 away from the battery disconnection unit 20, and the first conductive bar 113 is located on the side of the first battery group 11 away from the second battery group 12. Similarly, the two battery cell layers of the second battery group 12 are connected in series through the first conductive bar 113, the first conductive bar 113 is located on the side of the second battery group 12 away from the battery disconnection unit 20, and the first conductive bar 113 is located on the side of the second battery group 12 away from the first battery group 11. Optionally, the material of the first conductive bar 113 can be a conductive metal such as iron, copper, and silver. In this embodiment, the material of the first conductive bar 113 is copper.

[0042] In certain embodiments, the first battery pack 11 has a first input stage and a first output stage, the second battery pack 12 has a second input stage and a second output stage, the first input stage and the second output stage are electrically connected, and the first output stage and the second input stage are connected to the battery disconnection unit 20. Specifically, the battery disconnection unit 20 includes a main positive relay, a main negative relay, a switch, an additional relay, a relay protection module, etc. The first input stage and the second output stage can be directly connected through a conductive bar, or can be connected by connecting the switch, the additional relay, and the relay protection module in the battery disconnection unit 20; the first output stage is the total positive of the battery pack, the second input stage is the total negative of the battery pack, the first output stage is electrically connected to the main negative relay of the battery disconnection unit 20, and the second input stage is electrically connected to the main positive relay of the battery disconnection unit 20, and finally the high-voltage circuit connection of the battery pack is realized.

[0043] See also Figures 1 to 3 Further, the main positive electrode of the first battery cell layer 111 is connected to the battery disconnect unit 20, the negative electrode of the second battery cell layer 112 is connected to the battery disconnect unit 20, the main negative electrode of the third battery cell layer 121 is connected to the battery disconnect unit 20, and the positive electrode of the fourth battery cell layer 122 is connected to the battery disconnect unit 20.

[0044] In some embodiments, the length direction of the battery disconnect unit 20 is set along the first direction. Specifically, the length direction of the battery disconnect unit 20 refers to the extension direction of the longest side of the battery disconnect unit 20. The battery disconnect unit 20 is located on the end face of the battery pack 10 perpendicular to the second direction. Furthermore, the battery disconnect unit 20 is located on the end face of the battery pack 10 closest to the front end of the vehicle. With this arrangement, when the vehicle is driving, the air in the vehicle flows along the second direction, and the air will first blow on the battery disconnect unit 20 to cool down the battery disconnect unit 20, thereby avoiding excessive temperature of the battery disconnect unit 20 and improving the stability and safety of the battery pack 100.

[0045] In some embodiments, the length direction of the battery cell 13 is parallel to the first direction. Specifically, the battery cell 13 is arranged in an upright state with the length direction parallel to the first direction and the width direction parallel to the third direction in the battery pack 10, wherein the length direction of the battery cell 13 refers to the extension direction of the longest side of the battery cell 13, and the width direction of the battery cell 13 refers to the extension direction of the short side of the windward side of the battery cell 13. Such an arrangement can ensure that the battery pack 100 has a maximum heat dissipation area and an optimal heat dissipation speed while reducing the thickness of the battery pack 100 as much as possible. The reduction in thickness can further facilitate the dissipation of heat inside the battery pack 100.

[0046] See also Figure 5 Furthermore, a cold plate 14 is provided between the first battery cell layer 111 and the second battery cell layer 112. Similarly, a cold plate 14 is also provided between the third battery cell layer 121 and the fourth battery cell layer 122. The cold plate 14 is one of the key components in the liquid cooling system of the battery pack 100. Its main function is to control the temperature of the battery pack 10, promote the diffusion of the internal temperature of the battery pack 100, and ensure the normal operation of the battery pack 100. The cold plate 14 contacts the battery cell 13 to conduct the heat generated by the battery to the external environment to keep the temperature of the battery pack 10 within an appropriate range.

[0047] Preferably, the cold plate 14 is composed of a metal plate and a polyimide film. Specifically, the material of the cold plate 14 is a composite material composed of a metal plate and a polyimide film, which has excellent mechanical properties, electrical properties and high temperature resistance. During the manufacturing process, the metal plate is formed into a desired shape and size through a stamping process, and then the metal plate and the polyimide film are connected using brazing technology. The polyimide film has good wear resistance, corrosion resistance and insulation at high temperatures, and can effectively protect the metal plate from the influence of the external environment, while the metal plate improves the automated assemblability. At the same time, the metal plate has extremely strong thermal conductivity, which can effectively assist in cooling the battery pack 10.

[0048] See also Figure 2 and Figure 5In some embodiments, the battery cell 13 is provided with a vent structure 132, which is located on at least one end face of the battery pack, and the battery disconnect unit 13 is located on a different end face from the vent structure 132. The battery cell 13 is provided with a vent structure 132, which is located on at least one end face of the battery pack 10. The vent structure 132 refers to a design structure of the battery cell 13, including a vent hole and an explosion-proof valve, which is used to maintain the internal pressure of the battery cell 13 during use of the battery cell 13 and avoid explosion.

[0049] When the internal pressure of the battery unit 13 is too high, the exhaust structure 132 will discharge the high-temperature battery cell gas inside. If the battery disconnect unit 20 and the exhaust structure 132 are located on the same end face, the battery cell gas will be sprayed directly onto the battery disconnect unit 20. The high temperature will easily cause damage to the battery disconnect unit 20. In addition, the battery cell gas is blocked by the battery disconnect unit 20, which will hinder the diffusion of the battery cell gas, thereby causing uneven temperature inside the battery pack 100. Therefore, the battery disconnect unit 20 and the exhaust structure 132 should be located on different end faces.

[0050] See also Figure 1 and Figure 5 In some embodiments, the battery disconnect unit 20 is located on a surface of the battery pack 10 adjacent to the surface where the exhaust structure 132 is located. Specifically, the end surface of the first battery pack 11 away from the second battery pack 12 and the end surface of the second battery pack 12 away from the first battery pack 11 are both provided with the exhaust structure 132, and the battery disconnect unit 20 is arranged close to the adjacent end surface between the above two end surfaces, that is, the exhaust structure 132 is arranged on the end surfaces on both sides of the battery pack 10 parallel to the second direction. Since the air flow speed is fast here when the vehicle is running, when the battery unit 13 discharges the battery cell gas, the diffusion speed of the battery cell gas will also be accelerated, which is conducive to avoiding the generation of local high temperature.

[0051] In some embodiments, the exhaust structure 132 of each battery cell 13 includes multiple exhaust structures 132, and the multiple exhaust structures 132 are respectively located on the two end surfaces of the battery cell 13 perpendicular to the first direction. Specifically, the battery cell 13 has two exhaust structures 132, and the two exhaust structures 132 are respectively located on the two end surfaces perpendicular to the first direction. That is to say, all the exhaust structures 132 of the battery pack 10 are located on the two end surfaces of the battery pack 10 perpendicular to the first direction and in the gap between the first battery group 11 and the second battery group 12. When the vehicle is driving, the two end surfaces of the battery pack 10 perpendicular to the first direction and the gap between the first battery group 11 and the second battery group 12 have a faster air flow speed. When the battery cell 13 discharges the battery cell gas, the faster air flow speed can more easily blow away the battery cell gas and quickly cool it down, which can effectively prevent local high temperature caused by the battery cell gas.

[0052] See also Figure 5 In some embodiments, the battery pack 100 further includes a protective cover 15, which is provided on the exhaust structure 132. The protective cover 15 is a device for protecting the battery cells 13 inside the battery pack 100. The protective cover 15 is usually made of materials such as metal or plastic, and has sealing and air permeability, and can prevent moisture, dust, etc. from entering the battery cell 13, while ensuring that the pressure inside the battery cell 13 can be released normally. When the pressure inside the battery cell 13 is too high, the protective cover 15 will automatically open to release the internal pressure, prevent the battery pack 100 from exploding or catching fire, and protect the normal use of the battery pack 100.

[0053] See also Figure 1 and Figure 5 In some embodiments, the protective cover 15 is installed on the end surface of the first battery group 11 close to the second battery group 12 and / or the end surface of the second battery group 12 close to the first battery group 11. Specifically, the protective cover 15 is arranged on the exhaust mechanism in the gap between the first battery group 11 and the second battery group 12. When the battery cell 13 discharges the cell gas, the cell gas will impact on the protective cover 15 of the opposite battery cell 13, which can prevent the cell gas from directly impacting the opposite battery cell 13 and causing thermal runaway of the opposite battery cell 13.

[0054] See also Figure 1 , Figure 4 and Figure 5 In some embodiments, the battery pack 100 further includes a second conductive bar 16, and the battery pack 10 is electrically connected to the battery disconnect unit 20 via the second conductive bar 16. Specifically, the material of the second conductive bar 16 can be iron, copper, silver or other metals. In this embodiment, the material of the second conductive bar 16 is copper.

[0055] In some embodiments, the first battery pack 11 has a first input stage and a first output stage, the second battery pack 12 has a second input stage and a second output stage, the first input stage and the second output stage are electrically connected, and the first output stage and the second input stage are connected to the battery disconnection unit 20. Specifically, the battery disconnection unit 20 includes a main positive relay, a main negative relay, a switch, an additional relay, and / or a relay protection module, etc. The first input stage and the second output stage can be directly connected through a conductive bus, which can also be referred to in Figure 1 , Figure 4 and Figure 5The first input stage and the second output stage are each connected to the switch, the additional relay, and the relay protection module in the battery disconnect unit 20 through the second conductive bar 16 to achieve connection; the first output stage is the total positive of the battery pack, and the second input stage is the total negative of the battery pack. The first output stage is electrically connected to the main negative relay of the battery disconnect unit 20 through the second conductive bar 16, and the second input stage is electrically connected to the main positive relay of the battery disconnect unit 20 through the second conductive bar 16, and finally the high-voltage circuit connection of the battery pack is realized.

[0056] In the description of this specification, the description with reference to the terms "certain embodiments", "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 embodiments or examples are included in at least one embodiment or example of the present application. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described may be combined in any one or more embodiments or examples in a suitable manner.

[0057] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of this application, the meaning of "plurality" is at least two, such as two, three, unless otherwise clearly and specifically defined.

[0058] Although the embodiments of the present application have been shown and described above, it can be understood that the above embodiments are exemplary and cannot be understood as limitations on the present application. Ordinary technicians in this field can change, modify, replace and modify the above embodiments within the scope of the present application. The scope of the present application is defined by the claims and their equivalents.

Claims

1. A battery pack for a vehicle, characterized in that: include: A battery pack, the battery pack comprising a first battery pack and a second battery pack, the first battery pack and the second battery pack are arranged in parallel along a first direction, the first battery pack and the second battery pack each comprise two battery cell layers arranged in a stacked manner, each battery cell layer comprises a plurality of battery cells, the plurality of battery cells are arranged along a second direction, the first direction is perpendicular to the second direction, the plurality of battery cells in the same battery cell layer are connected in series, the two battery cell layers of the first battery pack are connected in series, and the two battery cell layers of the second battery pack are connected in series; A battery disconnect unit is arranged on one end surface of the battery pack, and the battery disconnect unit is electrically connected to the first battery pack and the second battery pack respectively.

2. The battery pack according to claim 1, characterized in that: The two battery cell layers of the first battery group are connected in series via a first conductive bar, and the first conductive bar is located at an end of the first battery group away from the battery disconnect unit.

3. The battery pack according to claim 1, characterized in that: The first battery pack has a first input stage and a first output stage, the second battery pack has a second input stage and a second output stage, the first input stage and the second output stage are electrically connected, and the first output stage and the second input stage are connected to the battery disconnect unit.

4. The battery pack according to claim 1, characterized in that: The length direction of the battery disconnect unit is arranged along the first direction.

5. The battery pack according to claim 1, characterized in that: The length direction of the battery cell is parallel to the first direction.

6. The battery pack according to claim 1, characterized in that: A cold plate is provided between two battery cell layers of the first battery pack.

7. The battery pack according to claim 6, characterized in that: The cold plate is composed of a metal plate and a polyimide film.

8. The battery pack according to claim 1, characterized in that: The battery unit is provided with an exhaust structure, the exhaust structure is located on at least one end surface of the battery pack, and the battery disconnection unit is located on a different end surface from the exhaust structure.

9. The battery pack according to claim 8, characterized in that: The battery disconnect unit is located on a surface of the battery pack adjacent to a surface where the vent structure is located.

10. The battery pack according to claim 8, characterized in that: Each battery cell includes a plurality of exhaust structures, and the plurality of exhaust structures are respectively located on two end surfaces of the battery cell that are perpendicular to the first direction.

11. The battery pack according to claim 8, characterized in that: The battery pack further includes a protective cover, which is disposed on the exhaust structure.

12. The battery pack according to claim 11, characterized in that: The protection cover is mounted on an end surface of the first battery pack close to the second battery pack and / or an end surface of the second battery pack close to the first battery pack.

13. The battery pack according to claim 1, characterized in that: The battery pack further includes a second conductive bar, and the battery pack is electrically connected to the disconnecting unit via the second conductive bar.

14. A vehicle, characterized in that: Comprising a battery pack as described in any one of claims 1-13.

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