Battery pack and automobile

Abstract

The embodiment of the invention discloses a battery pack and an automobile, and relates to the technical field of batteries. The battery pack comprises a first module, a second module and a busbar, the first module comprises a plurality of first battery modules, and the second module comprises a plurality of second battery modules; the electrode terminal of the first battery module and the electrode terminal of the second battery module are oppositely arranged, and the first battery module and the second battery module are connected in series through the electrode terminals; the busbars comprise the first busbar and the second busbar, and the first busbar and the second busbar are arranged on the electrode terminals on the outermost sides of the two ends of the second module respectively. According to the battery pack, the electrode terminals of the first battery modules in the first module and the electrode terminals of the second battery modules in the second module are oppositely arranged, so that series connection between the multiple first battery modules and the multiple second battery modules is completed only by using a small number of busbars, the structure of the new energy automobile battery pack is simplified, and the heat dissipation performance of the new energy automobile battery pack is improved.

Description

Technical Field

[0001] The embodiments of the present application relate to the field of battery technology, and in particular to a battery pack and a vehicle. Background Art

[0002] With the improvement and development of relevant technologies, power batteries, as the main energy source of new energy vehicles, are usually installed on the vehicle chassis in the form of battery packs. Therefore, the reasonable design and manufacturing of battery packs are of great significance to the overall design and manufacturing rationality of new energy vehicles.

[0003] At present, due to the limited space on the chassis of new energy vehicles, the battery pack installed on the chassis of new energy vehicles usually adopts a single-layer module layout, that is, all modules are arranged horizontally on a plane.

[0004] However, the current layout of new energy vehicle battery packs has large gaps between modules and large distances between the positive and negative terminals of single cells, resulting in the need for a large number of bus bars and voltage and temperature sampling lines, etc. The overall structure is complex and the heat dissipation performance is poor. Summary of the invention

[0005] The main purpose of the embodiments of the present application is to propose a battery pack and a vehicle, aiming to simplify the structure of the battery pack of a new energy vehicle and improve its heat dissipation performance.

[0006] In a first aspect, the present invention provides a battery pack, comprising: a first module, a second module, and a bus bar;

[0007] The first module includes a plurality of first battery modules, and the second module includes a plurality of second battery modules;

[0008] The electrode terminals of the first battery module are arranged opposite to the electrode terminals of the second battery module, and the first battery module and the second battery module are connected in series through the electrode terminals;

[0009] The busbars include a first busbar and a second busbar, and the first busbar and the second busbar are respectively arranged on the outermost electrode terminals at both ends of the second module.

[0010] In an optional embodiment, the number of first battery modules is less than the number of second battery modules; and two electrodes of the first battery module are respectively connected to two adjacent electrodes of two adjacent second battery modules, wherein the positive electrode of the first battery module is connected to the negative electrode of the second battery module, and the negative electrode of the first battery module is connected to the positive electrode of the second battery module.

[0011] In an optional embodiment, the battery pack further includes: a cooling plate; the cooling plate is covered on surfaces of the first battery module and the second battery module.

[0012] In an optional embodiment, the cooling plate is a liquid-cooled cooling plate or a direct-cooled cooling plate.

[0013] In an optional embodiment, thermally conductive adhesive is provided between the first battery module, the second battery module and the cooling plate.

[0014] In an optional embodiment, it further includes: a battery pack case, in which the first module, the second module, and the bus are all accommodated.

[0015] In an optional embodiment, the battery pack box includes: a box cover, a base and a connector;

[0016] The box cover and the base are buckled together to form a closed accommodating space, and the box cover and the base are connected by the connecting piece.

[0017] In an optional embodiment, the battery pack further comprises: a module bracket, the base being provided with a supporting structure and a protective structure, the protective structure comprising a plurality of protective rods;

[0018] The module bracket is arranged on the inner side of the box cover to support the first battery module after the box cover is closed; the support structure is supported on the bottom of the second battery module;

[0019] One end of the protection rod extends from the base toward the box cover and surrounds the outer sides of the first module and the second module. A cooling strip is embedded in the protection rod.

[0020] In an optional embodiment, the battery pack further includes: a plurality of explosion-proof valves; the box cover and the base are respectively provided with mounting holes, and each of the explosion-proof valves is installed in the corresponding mounting hole.

[0021] In a second aspect, the present invention provides a car, comprising an electric motor and a battery pack as described in any one of the aforementioned embodiments, wherein the battery pack is electrically connected to the electric motor.

[0022] The beneficial effects of the embodiments of the present application are:

[0023] The battery pack provided in the embodiment of the present application includes: a first module, a second module, and a busbar; the first module includes a plurality of first battery modules, and the second module includes a plurality of second battery modules; the electrode terminal of the first battery module is arranged opposite to the electrode terminal of the second battery module, and the first battery module and the second battery module are connected in series through the electrode terminal; the busbar includes a first busbar and a second busbar, and the first busbar and the second busbar are respectively arranged on the outermost electrode terminals at both ends of the second module. The battery pack realizes the series connection between the plurality of first battery modules and the second battery modules with only a small number of buses by arranging the electrode terminals of the first battery module in the first module opposite to the electrode terminals of the second battery module in the second module, thereby simplifying the structure of the battery pack of new energy vehicles and improving its heat dissipation performance. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying any creative work.

[0025] Figure 1 A schematic diagram of the structure of a battery pack provided in one embodiment of the present application;

[0026] Figure 2 for Figure 1 A local enlarged schematic diagram of the middle A;

[0027] Figure 3 A schematic diagram of a battery pack box structure of a battery pack provided in another embodiment of the present application;

[0028] Figure 4 A schematic diagram of the internal structure of a battery pack cover provided in another embodiment of the present application;

[0029] Figure 5 A schematic diagram of the internal structure of a base of a battery pack provided in yet another embodiment of the present application;

[0030] Figure 6 A schematic diagram of a structure in which a cooling strip is embedded in a protection rod according to another embodiment of the present application;

[0031] Figure 7 A schematic diagram of the battery pack box structure of a battery pack provided in yet another embodiment of the present application.

[0032] Reference numerals:

[0033] 1000-battery pack; 100-first module; 110-first battery module; 200-second module; 210-second battery module; 310-first bus; 320-second bus; 410-box cover; 411-explosion-proof valve; 420-base; 510-module bracket; 520-support structure; 610-protection rod; 611-cooling strip. DETAILED DESCRIPTION

[0034] In order to make the purpose, technical solution and advantages of the embodiments of the present application clearer, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, rather than all the embodiments. The components of the embodiments of the present application described and shown in the drawings here can be arranged and designed in various different configurations.

[0035] Therefore, the following detailed description of the embodiments of the present application provided in the accompanying drawings is not intended to limit the scope of the present application for which protection is sought, but merely represents selected embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in the field without creative work are within the scope of protection of the present application.

[0036] It should be noted that similar reference numerals and letters represent similar items in the following drawings, so once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings. At the same time, in the description of this application, the terms "first", "second", etc. are only used to distinguish the description and cannot be understood as indicating or implying relative importance.

[0037] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the existence of other identical elements in the process, method, article or device including the elements.

[0038] In the description of the present application, it should be noted that the terms "upper", "lower", "inside", "outside", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, or are the orientations or positional relationships in which the product of the application is usually placed when in use. They are only for the convenience of describing the present application 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 should not be understood as a limitation on the present application.

[0039] In the description of this application, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "disposed" and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be the internal communication of two elements. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0040] In conjunction with the accompanying drawings, some embodiments of the present application are described in detail below. In the absence of conflict, the following embodiments and features in the embodiments can be combined with each other.

[0041] The current new energy vehicle battery pack is usually arranged in a single-layer module layout. The gap between the battery modules and the distance between the positive and negative terminals of the single battery are large, resulting in the need for a large number of buses and voltage and temperature sampling lines, etc., and the overall structure is complex and the heat dissipation performance is poor. Some new energy vehicle battery packs are also arranged in a double-layer module layout, but in this double-layer module battery pack, two layers of buses and voltage and temperature sampling lines are required to be connected in series between the upper and lower modules, and then the two layers of buses and voltage and temperature sampling lines are connected in series again. The overall structure is complex and the heat dissipation performance is poor. The embodiment of the present application aims to propose a battery pack that can simplify the structure of the new energy vehicle battery pack and improve its heat dissipation performance.

[0042] Figure 1 A schematic diagram of the structure of a battery pack provided in an embodiment of the present application is shown in FIG. Figure 1 As shown, an embodiment of the present application provides a battery pack, including: a first module 100, a second module 200, and a bus.

[0043] The first module 100 includes a plurality of first battery modules 110 , and the second module 200 includes a plurality of second battery modules 210 .

[0044] Among them, the above-mentioned first battery module 110 and the above-mentioned second battery module 210 can be the same type of battery modules, that is, the model, size, shape and other parameters are the same, or they can be battery modules with different models, sizes, shapes and other parameters. The specific selection can be determined according to actual needs and is not limited here.

[0045] The electrode terminals of the first battery module 110 are disposed opposite to the electrode terminals of the second battery module 210 , and the first battery module 110 and the second battery module 210 are connected in series via the electrode terminals.

[0046] It can be understood that, as the model, size, shape and other parameters of the first battery module 110 and the second battery module 210 are the same or different, the size, shape and other parameters of the electrode terminal of the first battery module 110 and the electrode terminal of the second battery module 210 may also be the same or different. In this embodiment, the positive and negative electrode terminals of the first battery module 110 may be located on the same surface of the first battery module 110, and the positive and negative electrode terminals of the second battery module 210 may be located on the same surface of the second battery module 210. The electrode terminals of the first battery module 110 and the electrode terminals of the second battery module 210 are arranged opposite to each other, which may refer to the electrode terminals of the first battery module 110 and the electrode terminals of the second battery module 210 being in direct contact. The electrode terminals of the first battery module 110 and the electrode terminals of the second battery module 210 may be fixed by means including but not limited to welding or conductive adhesive bonding. After fixing, the plurality of first battery modules 110 and the second battery modules 210 may form a complete series circuit.

[0047] The busbars include a first busbar 310 and a second busbar 320 . The first busbar 310 and the second busbar 320 are respectively disposed on the outermost electrode terminals at both ends of the second module 200 .

[0048] The above-mentioned bus can be fixed to the above-mentioned electrode terminal by means including but not limited to welding or conductive adhesive bonding. The bus can be used to connect other circuit structures in the above-mentioned series circuit, but the specific connection method and what kind of circuit structure to connect can be selected and determined according to actual conditions and are not limited here.

[0049] Figure 2 for Figure 1 The local enlarged schematic diagram of point A in the middle is as follows: Figure 2As shown, the first bus 310 can be a conductive metal sheet, which is covered on the outermost electrode terminal at one end of the second module 200 and can be fixed by methods including but not limited to welding or conductive adhesive bonding. Similarly, the second bus 320 can also refer to the above content and be covered on the outermost electrode terminal at the other end of the second module 200. However, the specific shape, size, etc. of the bus can be selected and determined according to actual conditions and are not limited here.

[0050] In this embodiment, the battery pack 1000 includes: a first module 100, a second module 200, and a busbar; the first module 100 includes a plurality of first battery modules 110, and the second module 200 includes a plurality of second battery modules 210; the electrode terminals of the first battery module 110 are arranged opposite to the electrode terminals of the second battery module 210, and the first battery module 110 and the second battery module 210 are connected in series through the electrode terminals; the busbar includes a first busbar 310 and a second busbar 320, and the first busbar 310 and the second busbar 320 are respectively arranged on the outermost electrode terminals at both ends of the second module 200. The battery pack 1000 realizes the series connection between the plurality of first battery modules 110 and the second battery modules 210 with only a small number of busbars by arranging the electrode terminals of the first battery module 110 in the first module 100 and the second battery module 210 in the second module 200 opposite to each other, thereby simplifying the structure of the battery pack of new energy vehicles and improving its heat dissipation performance.

[0051] In addition, Figure 1 Based on the embodiment, the number of the above-mentioned first battery modules 110 can be less than the number of the above-mentioned second battery modules 210, and the two electrodes of the above-mentioned first battery module 110 can be respectively connected to the adjacent two electrodes of two adjacent second battery modules 210, wherein the positive electrode of the first battery module 110 can be connected to the negative electrode of the second battery module 210, and the negative electrode of the above-mentioned first battery module 110 can be connected to the positive electrode of the second battery module 210.

[0052] refer to Figure 1 In this embodiment, the first battery module 110 and the second battery module 210 can be arranged in a row at intervals, and the row where the first battery module 110 is located and the row where the second battery module 210 is located can be as follows Figure 1 As shown in the figure, they overlap longitudinally, and in order to realize that the positive electrode of the above-mentioned first battery module 110 can be connected to the negative electrode of a second battery module 210, and the negative electrode of the above-mentioned first battery module 110 can be connected to the positive electrode of another second battery module 210, the first battery module 110 and the second battery module 210 can be staggered.

[0053] Furthermore, based on the above-mentioned embodiment, the battery pack 1000 may further include: a cooling plate (not shown in the figure), and the cooling plate may be covered on the surface of the first battery module 110 and the second battery module 210 .

[0054] Exemplarily, the cooling plates may be separately covered on each surface of the first battery module 110 and the second battery module 210 in the form of individual pieces, or may be a cooling shell formed by a plurality of cooling plates that wraps around the entire surface of the first battery module 110 and the second battery module 210. Of course, the specific form of setting the cooling plates may be determined based on actual conditions and is not limited here. The fixing methods of the cooling plates include but are not limited to welding and bonding.

[0055] Further, based on the above embodiments, the cooling plate may be a liquid cooling plate or a direct cooling plate.

[0056] It is understandable that when the above-mentioned cooling plate is a liquid-cooled cooling plate, there may be a cavity in the liquid-cooled cooling plate for storing cooling media such as refrigerants or coolants. However, in some extremely cold or high temperature scenarios, the battery pack 1000 may not need to dissipate heat due to low temperature or cannot dissipate heat due to high temperature, and instead needs to isolate the heat exchange with the external environment as much as possible. At this time, the refrigerant or coolant in the cavity of the liquid-cooled cooling plate can be replaced with an inert medium, or the cavity of the liquid-cooled cooling plate can be set to a vacuum state to reduce the heat exchange between the first battery module 110 and the second battery module 210 and the external environment, thereby reducing the impact of the external environment temperature on the battery pack 1000 in some extremely cold or high temperature scenarios. Of course, the specific filling content or internal state of the liquid-cooled cooling plate can be determined according to the actual thermal management requirements, and is not limited here.

[0057] When the above-mentioned cooling plate is a direct cooling cooling plate, the material of the direct cooling cooling plate can be a material with good thermal conductivity, such as copper, aluminum alloy, stainless steel, ceramic, etc. The outer surface of the direct cooling cooling plate (that is, the side that is not in direct contact with the surface of the first battery module or the second battery module) can be a smooth plane, or it can be a non-smooth surface with multiple raised heat sinks. Of course, the specific material, size, shape, etc. of the direct cooling cooling plate can be adaptively adjusted according to actual conditions and are not limited here.

[0058] In addition, based on the above-mentioned embodiment, a thermal conductive adhesive may be provided between the first battery module 110 and the second battery module 210 and the cooling plate.

[0059] The thermally conductive adhesive may be used to fill the gap between the first battery module 110 and the second battery module 210 and the cooling plate, thereby accelerating the heat exchange speed between the first battery module 110 and the second battery module 210 and the cooling plate.

[0060] Figure 3 A schematic diagram of a battery pack box structure of a battery pack provided in another embodiment of the present application, in Figure 1 Based on the example, Figure 3 As shown, the battery pack 1000 may further include: a battery pack case, in which the first module 100 , the second module 200 , and the bus bar may all be accommodated.

[0061] Furthermore, based on the above-mentioned embodiment, the above-mentioned battery pack box may also include: a box cover 410, a base 420 and a connector (not shown in the figure).

[0062] The box cover 410 and the base 420 are buckled together to form a closed accommodation space, and the box cover 410 and the base 420 are connected by the connecting piece.

[0063] Exemplarily, the connecting member may be, for example, a nut, a bolt, a hinge, etc. Taking a nut as an example, the buckling part of the box cover 410 and the base 420 may have a plurality of holes for the nuts to be screwed into, so as to facilitate the fixing and connecting of the box cover 410 and the base 420 by the nuts. The connecting member may also be, for example, a buckle, etc. In this case, the buckle may be arranged on the outside of the box cover 410 and the base 420 to buckle the box cover 410 and the base 420. Of course, the specific form of the connecting member may be selected and determined according to actual needs, and is not limited here.

[0064] In this embodiment, the battery pack 1000 further includes: a battery pack case, in which the first module 100, the second module 200, and the bus are all housed. The material of the battery pack case may be one or more of aluminum alloy, stainless steel, plastic, etc., or other appropriate materials, which are not limited here.

[0065] The battery pack case includes: a case cover 410, a base 420 and a connector; the case cover 410 and the base 420 are buckled together to form a closed accommodation space, and the case cover 410 and the base 420 are connected by the connector. In this embodiment, the battery pack case is formed by buckling the case cover 410 and the base 420, and a detachable connection of the battery pack case is achieved, thereby improving the efficiency and convenience in scenarios such as internal maintenance of the battery pack 1000.

[0066] Further, Figure 4A schematic diagram of the internal structure of a battery pack cover provided in another embodiment of the present application is shown in FIG. Figure 5 A schematic diagram of the internal structure of a base of a battery pack provided in another embodiment of the present application, Figure 6 A schematic diagram of a structure in which a cooling strip is embedded in a protection rod according to another embodiment of the present application, based on the above embodiment, as Figure 4 , Figure 5 and Figure 6 As shown, the battery pack 1000 further includes: a module bracket 510 , a support structure 520 and a protection structure are disposed on the base 420 , and the protection structure includes a plurality of protection rods 610 .

[0067] The module support 510 is disposed inside the box cover 410 to support the first battery module 110 after the box cover 410 is closed, and the support structure 520 abuts against the bottom of the second battery module 210 .

[0068] One end of the protection bar 610 extends from the base 420 toward the box cover 410, and surrounds the outside of the first module 100 and the second module 200. The protection bar 610 is embedded with a cooling strip 611 (only Figure 6 ).

[0069] It is understandable that if the surfaces of the first battery module 110 and the second battery module 210 are covered with cooling plates, the module bracket 510 and the supporting structure 520 are actually supported or abutted against the cooling plates.

[0070] The positions where the module bracket 510 and the support structure 520 support or abut against the first battery module 110 and the second battery module 210 may be provided with buffer structures such as buffer pads to reduce the impact and extrusion of the module bracket 510 and the support structure 520 and the first battery module 110 or the second battery module 210.

[0071] The module bracket 510 and the support structure 520 may be integrally formed with the box cover 410 and the base 420, respectively, or may be welded or bonded to the box cover 410 and the base 420. The specific fixing form may be selected and determined according to actual conditions and is not limited here.

[0072] Please refer to Figure 5The above-mentioned protection rod 610 can be of different lengths. The longer protection rod 610 can be used to protect the first battery module 110 in the first module 100, and the shorter protection rod 610 can be used to protect the second battery module 210 in the second module 200. The above-mentioned protection rod 610 can be integrally formed with the above-mentioned base 420, or can be welded or bonded to the base 420. The specific selection can be determined according to actual conditions and is not limited here. The distance between the protection rod 610 and the first module 100 and the second module 200 can be less than the preset value, or can be in direct contact for better protection.

[0073] Please refer to Figure 6 A cooling strip 611 may be embedded in the protective rod 610. The cooling strip 611 may be a cylinder or a flat strip. Its length may be the same as the protective rod 610 in which it is located. The cooling strip 611 may be made of a material with good thermal conductivity, such as copper, aluminum alloy, stainless steel, ceramic, etc., but is not limited thereto.

[0074] The cooling strip 611 may be a solid structure or a hollow structure with a cavity inside. Taking the cooling strip 611 as an example of a hollow structure with a cavity inside, the cavity inside can be used to store cooling media such as refrigerants or coolants, which is similar to the principle of the above-mentioned liquid-cooled cooling plate. In some scenarios, the cooling media such as refrigerants or coolants in the cavity of the cooling strip 611 can be replaced with an inert medium, or the cavity of the cooling strip 611 can be set to a vacuum state to reduce the heat exchange between the first battery module 110 and the second battery module 210 and the external environment, thereby reducing the impact of the external environment temperature on the battery pack 1000 in some extremely cold or high temperature scenarios.

[0075] Understandably, Figure 4 , Figure 5 and Figure 6 The content is only for example, the actual arrangement and quantity of the module bracket 510 and the support structure 520 can be selected and determined according to the actual situation, and is not limited to Figure 4 and Figure 5 The module bracket 510 and the support structure 520 can better fix the battery module on the one hand, and can also enhance the strength of the box cover 410 and the base 420 on the other hand. Of course, the arrangement and number of the protective rods 610 can also be selected and determined according to actual conditions, and are not limited to Figure 5 The protection bar 610 can better fix the battery module and enhance the strength of the battery pack. The shape, size, material, specific structure and filling content of the cooling bar 611 can be selected and determined according to actual needs and are not limited to the above. Figure 6 The limits shown are as follows.

[0076] Figure 7 A schematic diagram of a battery pack box structure of a battery pack provided in yet another embodiment of the present application, in Figure 3 Based on the example, Figure 7 As shown, the battery pack 1000 may further include: a plurality of explosion-proof valves 411; the box cover 410 and the base 420 are respectively provided with mounting holes (not shown in the figure), and each of the explosion-proof valves is installed in the corresponding mounting hole.

[0077] Please refer to Figure 7 , for the convenience of observation, Figure 7 As shown in the figure, the top surface of the box cover 410 and the bottom surface of the base 420 face the same direction, and the plurality of explosion-proof valves 411 can be respectively installed on the outer sides of the box cover 410 and the base 420 through the installation holes.

[0078] When the first battery module 110 and the second battery module 210 inside the battery pack case explode, the gas pressure inside the battery pack increases rapidly. At this time, the gas inside the battery pack case can be discharged to the outside of the battery pack case through the multiple explosion-proof valves 411 to reduce the damage caused by the explosion. It is understandable that if the surface of the first battery module 110 and the second battery module 210 is covered with a cooling plate, the cooling plate can be provided with exhaust holes to allow the gas generated by the explosion of the first battery module 110 and the second battery module 210 to be discharged smoothly. The number, size, shape, specific position, etc. of the explosion-proof valves and exhaust holes can be adjusted according to actual needs and are not limited here.

[0079] Optionally, the exhaust hole may be provided on the cooling plate at a position opposite to the explosion-proof valve, so that the gas can be discharged more directly and quickly when an explosion occurs.

[0080] In addition, the battery pack housing may be provided with an external connector (not shown in the figure), which may include a high-voltage plug-in, a low-voltage plug-in, an electric heating component and a maintenance switch circuit breaker. The high-voltage plug-in may be used to electrically connect to an external device to provide power to the outside; the low-voltage plug-in may be used to communicate with an external device to achieve communication with the outside; the electric heating component may be wrapped on the surface of the high-voltage plug-in and may be used for heating to ensure the normal operation of the high-voltage plug-in in an extremely cold environment; the maintenance switch circuit breaker may be used to control the power on / off of the high-voltage plug-in to stop the external power supply of the battery pack 1000 in maintenance and other scenarios. It is understandable that the specific shape, size, model, setting position, plug-ins / components included, etc. of the external connector may be selected and determined according to actual needs and are not limited here.

[0081] In addition, the battery pack 1000 may also include a voltage sampling line, a temperature sampling line, a flexible circuit board and a power management device (not shown in the figure), one end of the voltage sampling line may be connected to any electrode terminal of the first battery module 110 or the second battery module 210 or to any bus bar, and the other end is connected to the power management device through a flexible circuit board to sample and monitor the voltage of the series circuit in the battery pack 1000, and one end of the temperature sampling line may be provided with a temperature sensor, which may be provided at any position inside the battery pack 1000, and the other end is connected to the power management device through a flexible circuit board. Management device, to sample and monitor the temperature in the battery pack 1000. The above-mentioned voltage sampling line and temperature sampling line may have one or more lines respectively. The above-mentioned power management device may include a microcontroller. The power management device may actively power off the battery pack 1000, issue voltage / temperature abnormality alarms or estimate the battery pack power according to the voltage data and temperature data collected by the above-mentioned voltage sampling line and temperature sampling line. Of course, the specific setting method, specific function, specific size, model, etc. of the above-mentioned voltage sampling line, temperature sampling line, flexible circuit board and power management device can be selected and determined according to actual needs and are not limited here.

[0082] The embodiment of the present invention further provides a car, which may include an electric motor and the above-mentioned battery pack. The above-mentioned battery pack may be electrically connected to the above-mentioned electric motor to provide electrical energy to the above-mentioned electric motor, and the electric motor may convert the electrical energy into mechanical energy to drive the above-mentioned car to move. It is understandable that a car may include one or more of the above-mentioned battery packs. If there are multiple battery packs, the multiple battery packs may be connected in series and electrically connected to the above-mentioned motor. Of course, the specific number of battery packs, the connection method between the multiple battery packs, the location of the battery packs, etc. can all be selected and determined according to actual needs, and are not limited here.

[0083] Optionally, the car in the embodiment of the present application is a new energy car.

[0084] Of course, the above is only a preferred embodiment of the present application and is not intended to limit the present application. For those skilled in the art, the present application may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

[0085] It will be apparent to those skilled in the art that the present application is not limited to the details of the exemplary embodiments described above, and that the present application can be implemented in other specific forms without departing from the spirit or essential features of the present application. Therefore, the embodiments should be considered exemplary and non-limiting in all respects, and the scope of the present application is defined by the appended claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims be included in the present application. Any reference numeral in a claim should not be considered as limiting the claim to which it relates.

Claims

1. A battery pack, It is characterized in that include: A first module, a second module, and a bus; The first module includes a plurality of first battery modules, and the second module includes a plurality of second battery modules; The electrode terminals of the first battery module are arranged opposite to the electrode terminals of the second battery module, and the first battery module and the second battery module are connected in series through the electrode terminals; The busbars include a first busbar and a second busbar, and the first busbar and the second busbar are respectively arranged on the outermost electrode terminals at both ends of the second module.

2. The battery pack according to claim 1, It is characterized in that The number of the first battery modules is less than the number of the second battery modules; and the two electrodes of the first battery module are respectively connected to the two adjacent electrodes of the two adjacent second battery modules, wherein the positive electrode of the first battery module is connected to the negative electrode of the second battery module, and the negative electrode of the first battery module is connected to the positive electrode of the second battery module.

3. The battery pack according to claim 1, It is characterized in that The battery pack further includes: a cooling plate; the cooling plate is covered on surfaces of the first battery module and the second battery module.

4. The battery pack according to claim 3, It is characterized in that The cooling plate is a liquid cooling plate or a direct cooling plate.

5. The battery pack according to claim 3, It is characterized in that Thermally conductive adhesive is disposed between the first battery module, the second battery module and the cooling plate.

6. The battery pack according to claim 1, It is characterized in that Also includes: A battery pack case, wherein the first module, the second module, and the bus are all accommodated in the battery pack case.

7. The battery pack according to claim 6, It is characterized in that The battery pack box includes: a box cover, a base and a connector; The box cover and the base are buckled together to form a closed accommodating space, and the box cover and the base are connected by the connecting piece.

8. The battery pack according to claim 7, It is characterized in that The battery pack further comprises: a module bracket, the base being provided with a supporting structure and a protective structure, the protective structure comprising a plurality of protective rods; The module bracket is arranged on the inner side of the box cover to support the first battery module after the box cover is closed; the support structure is supported on the bottom of the second battery module; One end of the protection rod extends from the base toward the box cover and surrounds the outer sides of the first module and the second module. A cooling strip is embedded in the protection rod.

9. The battery pack according to claim 7, It is characterized in that The battery pack further includes: a plurality of explosion-proof valves; the box cover and the base are respectively provided with mounting holes, and each of the explosion-proof valves is mounted in the corresponding mounting hole.

10. A car, It is characterized in that The automobile comprises an electric motor and a battery pack according to any one of claims 1 to 9, wherein the battery pack is electrically connected to the electric motor.

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