Battery pack and vehicle

Abstract

The utility model discloses a battery pack and a vehicle, the battery pack comprises a power battery module, a starting battery module and a first shell, the power battery module and the starting battery module are both arranged in the first shell, the first shell is provided with a high-voltage output end and a low-voltage output end, and the high-voltage output end is connected with the low-voltage output end. The power battery module is connected with the high-voltage output end, and the starting battery is connected with the low-voltage output end.

Description

Technical Field

[0001] The utility model relates to the technical field of automobile manufacturing, and more specifically, to a battery pack and a vehicle. Background Art

[0002] With the rapid development of the new energy vehicle industry, it has been applied to more and more families with its advantages such as low carbon, environmental protection, low noise and high driving efficiency. Among them, the power battery pack, as the core component of new energy vehicles, provides power for the vehicle.

[0003] At present, in vehicles of related technologies, in addition to the power battery, an iron-lithium battery is usually additionally provided as a low-voltage starting battery, that is, two independent batteries are provided in the vehicle, which is not convenient for integrated control and thermal management. Utility Model Content

[0004] An object of the utility model is to provide a battery pack and a vehicle.

[0005] According to one aspect of the utility model, a battery pack is provided, comprising:

[0006] Power battery module;

[0007] Start the battery module;

[0008] A first housing, wherein the power battery module and the starting battery module are both arranged in the first housing;

[0009] The first shell is provided with a high-voltage output terminal and a low-voltage output terminal, the power battery module is connected to the high-voltage output terminal, and the starting battery is connected to the low-voltage output terminal.

[0010] Optionally, it also includes a thermal management system arranged in the first shell, and the power battery module and the starting battery module are both arranged on a heat exchange circulation pipeline of the thermal management system. The thermal management system is used to perform heat exchange with the power battery module and / or the starting battery module through the heat exchange circulation pipeline.

[0011] Optionally, the thermal management system further includes a cold plate, the heat exchange circulation pipeline is arranged in the cold plate, and the cold plate covers the power battery module and the starting battery module.

[0012] Optionally, the battery pack further includes:

[0013] A battery management system is arranged in the first shell, and the battery management system is used to collect battery information of the power battery module and the starting battery module and transmit it to the electronic control unit, so that the electronic control unit can control the thermal management system to perform heat exchange with the power battery module and / or the starting battery module according to the battery information.

[0014] The battery management system comprises a first battery management system, and a second end of the first battery management system is connected to the power battery module;

[0015] A first communication interface is provided on the first housing, and a first end of the first battery management system is connected to the first communication interface;

[0016] The first battery management system is used to collect first battery information of the power battery module and transmit the first battery information to the electronic control unit through the first communication interface.

[0017] Optionally, the battery management system includes a second battery management system, and the second end of the second battery management system is connected to the starting battery module;

[0018] A second communication interface is provided on the first housing, and a first end of the second battery management system is connected to the second communication interface;

[0019] The second battery management system is used to collect second battery information of the starting battery module and transmit the second battery information to the electronic control unit through the second communication interface.

[0020] Optionally, the battery pack further includes a high-voltage power distribution unit disposed in the first shell, a first end of the high-voltage power distribution unit is connected to the power battery module, and a second end of the high-voltage power distribution unit is connected to the high-voltage output end.

[0021] Optionally, the battery pack further includes a second shell disposed within the first shell, and the battery management system and the high-voltage power distribution unit are both disposed within the second shell.

[0022] Optionally, the second end of the second battery management system is connected to the starting battery module, and the third end of the second battery management system is connected to the low-voltage output end.

[0023] Optionally, the first communication interface and the second communication interface are provided by a connector.

[0024] Optionally, the shape of the starting battery module is the same as that of the power battery module.

[0025] Optionally, the starting battery module is an iron battery.

[0026] According to a second aspect of the utility model, a vehicle is provided, comprising a battery pack as described in the first aspect of the utility model.

[0027] Optionally, the vehicle includes an electronic control unit, the electronic control unit is connected to a battery management system of the battery pack, and the battery management system is used to collect battery information of the power battery module and the starting battery module;

[0028] The electronic control unit is used for:

[0029] When the vehicle is turned off, determining that a first condition is met according to the battery information, and controlling the thermal management system to perform heat exchange with the power battery module and / or the starting battery module;

[0030] When the vehicle is started, determining that a second condition is met according to the battery information, and controlling the thermal management system to perform heat exchange with the power battery module and / or the starting battery module;

[0031] Wherein, the first condition is that the temperature of the power battery module exceeds the first temperature range and / or the temperature of the starting battery module exceeds the second temperature range, and the starting battery module is in a charging state;

[0032] The second condition is that the temperature of the power battery module exceeds the first temperature range and / or the temperature of the starting battery module exceeds the second temperature range.

[0033] Through the battery pack of the embodiment of the present disclosure, the power battery module and the starting battery module are integrated in the first shell, which can improve the integration level of components in the vehicle using the battery pack and facilitate integrated control and thermal management.

[0034] Other features and advantages of the present invention will become apparent from the following detailed description of exemplary embodiments of the present invention with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] The accompanying drawings, which constitute a part of the specification, illustrate embodiments of the present utility model and, together with the description, are used to explain the principles of the present utility model.

[0036] Figure 1 is a principle block diagram of a battery pack according to an embodiment of the utility model;

[0037] Figure 2 is a schematic structural diagram of a battery pack according to an embodiment of the utility model;

[0038] Figure 3is a principle block diagram of a battery pack according to an embodiment of the utility model;

[0039] Figure 4 is a principle block diagram of a battery pack according to an embodiment of the utility model;

[0040] Figure 5 is a schematic structural diagram of a battery pack according to an embodiment of the utility model;

[0041] Figure 6 It is a control flow chart of an electronic control unit according to an embodiment of the utility model. DETAILED DESCRIPTION

[0042] Various exemplary embodiments of the present invention will now be described in detail with reference to the accompanying drawings. It should be noted that unless otherwise specifically stated, the relative arrangements of components and steps, numerical expressions and numerical values ​​set forth in these embodiments do not limit the scope of the present invention.

[0043] The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the present invention, its application, or uses.

[0044] Techniques and equipment known to ordinary technicians in the relevant art may not be discussed in detail, but where appropriate, the techniques and equipment should be considered part of the specification.

[0045] In all examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not limiting. Therefore, other examples of the exemplary embodiments may have different values.

[0046] It should be noted that like reference numerals and letters refer to similar items in the following figures, and therefore, once an item is defined in one figure, it need not be further discussed in subsequent figures.

[0047] The present disclosure provides a battery pack. Figure 1 It is a principle block diagram of a battery pack according to an embodiment of the utility model.

[0048] according to Figure 1 As shown, the battery pack 1000 may include a power battery module 1100, a starting battery module 1200 and a first shell 1300. The power battery module 1100 and the starting battery module 1200 are both arranged in the first shell 1300. A high-voltage output terminal 1310 and a low-voltage output terminal 1320 are arranged on the first shell 1300. The power battery module 1100 is connected to the high-voltage output terminal 1310, and the starting battery module 1200 is connected to the low-voltage output terminal 1320.

[0049] Through the embodiments of the present disclosure, the power battery module and the starting battery module are integrated in the first shell to form a battery pack, which can improve the integration level of components in a vehicle using the battery pack, optimize the space of the entire vehicle, and facilitate integrated control and thermal management.

[0050] In one embodiment of the present disclosure, the starting battery module 1200 may include a plurality of starting cells, wherein the starting cells are iron batteries.

[0051] Specifically, the starting battery cell may be a lithium iron phosphate battery.

[0052] In this way, the starting battery module does not contain heavy metal elements that are harmful to the human body, thereby improving the safety of the starting battery module.

[0053] In one embodiment of the present disclosure, Figure 2 As shown, the battery pack 1000 may further include a thermal management system 1400 disposed in the first shell 1300, and the power battery module 1100 and the starting battery module 1200 are both disposed on a heat exchange circulation pipeline of the thermal management system 1400, and the thermal management system 1400 is used to perform heat exchange with the power battery module 1100 and the starting battery module 1200 through the heat exchange circulation pipeline.

[0054] The power battery module 1100 and the starting battery module 1200 are disposed on the heat exchange circulation pipe. The power battery module 1100 and the starting battery module 1200 may both be in contact with the heat exchange circulation pipe for heat exchange.

[0055] In this embodiment, if Figure 2 As shown, the thermal management system 1400 may include a total water inlet and a total water outlet, and both ends of the heat exchange circulation pipeline are respectively connected to the total water inlet and the total water outlet, and the total water inlet and the total water outlet may be arranged on the first shell 1300.

[0056] Furthermore, the thermal management system 1400 can cool the power battery module 1100 and the starting battery module 1200 by cooling the heat exchange liquid in the heat exchange circulation pipe. The thermal management system 1400 can also heat the power battery module 1100 and the starting battery module 1200 by heating the heat exchange liquid in the heat exchange circulation pipe.

[0057] The existing starting battery module does not have a corresponding thermal management system. When the vehicle is used in a high-temperature environment for a long time, the starting battery module is at risk of life degradation and thermal runaway, and there is also the problem of insufficient discharge capacity at low temperatures.

[0058] In this embodiment, the power battery module and the starting battery module are integrated into one battery pack, and the power battery module and the starting battery module share one thermal management system. Without adding a separate heat dissipation component, the power battery module and the starting battery module are uniformly managed by one thermal management system, which can reduce the manufacturing cost of the vehicle. In addition, the thermal management system of the power battery module is used to perform thermal management on the starting battery module, which can reduce the impact of high and low temperature environments on the starting battery module, reduce the life attenuation of the starting battery module caused by working in a high temperature environment, and can also improve the impact of low temperature on the discharge capacity of the starting battery module.

[0059] Furthermore, if Figure 2 As shown, the thermal management system 1400 includes a cold plate, a heat circulation pipeline is arranged in the cold plate, and the cold plate covers the power battery module 1100 and the starting battery module 1200 .

[0060] For example, the cold plate may be a first surface that completely covers the power battery module 1100 and a second surface that completely covers the starting battery module 1200. The first surface may be the surface with the largest area of ​​the power battery module 1100, so that the contact area between the power battery module 1100 and the cold plate can be maximized, and the heat exchange efficiency between the power battery module 1100 and the thermal management system 1400 can be maximized. Correspondingly, the second surface may be the surface with the largest area of ​​the starting battery module 1200, so that the contact area between the starting battery module 1200 and the cold plate can be maximized, and the heat exchange efficiency between the starting battery module 1200 and the thermal management system 1400 can be maximized.

[0061] It is understandable that the cold plate and the heat circulation pipeline can be integrally formed, or the heat circulation pipeline can be independently arranged in the cold plate.

[0062] In one embodiment of the present disclosure, the shape of the starting battery module 1200 is the same as that of the power battery module 1100 .

[0063] In this embodiment, the starting battery module can be made into a long strip shape similar to the power battery module, and the starting battery module is arranged in front of the power battery module.

[0064] In one embodiment of the present disclosure, Figure 3 As shown, the battery pack 1000 may also include a battery management system 1500, which is disposed in the first shell 1300. The battery management system 1500 is used to collect battery information of the power battery module 1100 and the starting battery module 1200 and transmit it to the electronic control unit, so that the electronic control unit can control the thermal management system 1400 to perform heat exchange with the power battery module 1100 and / or the starting battery module 1200 according to the battery information.

[0065] In the first embodiment of the present disclosure, the power battery module 1100 and the starting battery module 1200 may share a battery management system.

[0066] On this basis, if Figure 3 As shown, a communication interface 1330 is provided on the first shell 1300, a first end of the battery management system 1500 is connected to the power battery module 1100, a second end of the battery management system 1500 is connected to the starting battery module 1200, and a third end of the battery management system 1500 is connected to the communication interface 1330. The battery management system 1500 is used to collect battery information of the power battery module 1100 and the starting battery module 1200, and transmit the battery information to the electronic control unit through the communication interface 1330.

[0067] Furthermore, the fourth terminal of the battery management system 1500 may also be connected to the low voltage output terminal 1320 .

[0068] In this embodiment, the battery management system is connected to the power battery module 1100 and the starting battery module 1200 at the same time, and the battery management system can collect battery information of both the power battery module 1100 and the starting battery module 1200 .

[0069] In the second embodiment of the present disclosure, Figure 4 and Figure 5 As shown, the battery management system 1500 includes a first battery management system 1510, and the second end of the first battery management system 1510 is connected to the power battery module 1100. The communication interface 1330 includes a first communication interface 1331, and the first end of the first battery management system 1510 is connected to the first communication interface 1331. The first battery management system 1510 is used to collect first battery information of the power battery module 1100, and transmit the first battery information to the electronic control unit through the first communication interface 1331.

[0070] The connection between the first battery management system 1510 and the power battery module 1100 may include an electrical connection or a communication connection.

[0071] Furthermore, if Figure 4 and Figure 5As shown, the battery management system 1500 includes a second battery management system 1520, and the second end of the second battery management system 1520 is connected to the starting battery module 1200. The communication interface 1330 includes a second communication interface 1332, and the first end of the second battery management system 1520 is connected to the second communication interface 1332. The second battery management system 1520 is used to collect the second battery information of the starting battery module 1200, and transmit the second battery information to the electronic control unit through the second communication interface 1332.

[0072] The connection between the second battery management system 1520 and the starting battery module 1200 may include an electrical connection or a communication connection.

[0073] Furthermore, the third terminal of the second battery management system 1520 may also be connected to the low voltage output terminal 1320 .

[0074] 1331133113321331133213311332 The thermal management system 1400 is connected to the electronic control unit, so that the electronic control unit controls the thermal management system 1400 to perform heat exchange with the power battery module 1100 and / or the starting battery module 1200 according to the first battery information and / or the second battery information.

[0075] The battery information of this embodiment may include at least the temperature information of the corresponding battery module, and may also include the voltage information and current information of the corresponding battery.

[0076] When the vehicle is in the ON gear or OK gear, the vehicle is in the powered-on state. In a high-temperature environment, since the temperatures of other related components of the vehicle rise to a high level, the vehicle's electronic fans, water pumps, blowers and other high-power low-voltage electrical appliances will start working to cool down the vehicle's power battery module, DCDC, motor and electronic control and other functional modules. The low-voltage load power consumption of the vehicle will continue to soar, and the power output will be limited after the DCDC is overheated. The starting battery module will also discharge with a large current, and the positive fuse box will also cause thermal damage to the starting battery module. Multiple factors will cause the starting battery to overheat. Long-term exposure to such high-temperature conditions will cause the life of the starting battery module to decline, leading to thermal runaway.

[0077] The electronic control unit may be configured to determine the temperatures of the power battery module 1100 and the starting battery module 1200 based on the first battery information and the second battery information when the vehicle is powered on, and control the thermal management system 1400 to cool down the power battery module 1100 and the starting battery module 1200 when the temperature of the power battery module 1100 is greater than or equal to the first temperature threshold, or when the temperature of the starting battery module 1200 is greater than or equal to the second temperature threshold.

[0078] The first temperature threshold and the second temperature threshold may be respectively set in advance according to application scenarios or specific requirements. For example, the first temperature threshold may be smaller than the second temperature threshold.

[0079] When the thermal management system 1400 cools down the power battery module 1100 and the starting battery module 1200, the starting battery module will also benefit from the cooling of the thermal management system 1400, and the temperature of the starting battery module can be controlled to be close to the temperature of the power battery module. And because the first temperature threshold is much lower than the second temperature threshold, the starting battery module only needs to "freely" cool down the power battery module, and there is no need to formulate relevant cooling strategies and plans for the starting battery module.

[0080] On this basis, the electronic control unit controls the thermal management system 1400 to stop cooling the power battery module 1100 and the starting battery module 1200 when it determines that the temperature of the power battery module 1100 is lower than the first temperature threshold and that the temperature of the starting battery module 1200 is lower than the second temperature threshold based on the first battery information and the second battery information.

[0081] Since the starting battery module is composed of cells made of lithium iron phosphate material, its discharge capacity in low temperature environments is very low, and the entire vehicle may be unable to start in extremely cold weather.

[0082] The electronic control unit may be configured to determine the temperatures of the power battery module 1100 and the starting battery module 1200 based on the first battery information and the second battery information when the vehicle is powered on, and control the thermal management system 1400 to heat the power battery module 1100 and the starting battery module 1200 when the temperature of the power battery module 1100 is less than or equal to the third temperature threshold, or when the temperature of the starting battery module 1200 is less than or equal to the fourth temperature threshold.

[0083] In this way, in a low temperature environment, the starting battery module can share a thermal management system with the power battery module for heating, thereby improving the discharge capability of the starting battery module at low temperatures.

[0084] When the vehicle is in the OFF gear, the vehicle is in a power-off state, the output current of the starting battery module 1200 is low, and the temperature of the starting battery module will not rise too much in a high temperature environment. When the power battery module 1100 charges the starting battery module 1200, the starting battery module 1200 is in a charging group state, which may cause the temperature of the starting battery module 1200 to rise more.

[0085] The electronic control unit can also determine the temperature of the power battery module 1100 and the starting battery module 1200 according to the first battery information and the second battery information when the vehicle is powered off, and when the temperature of the power battery module 1100 is greater than or equal to the first temperature threshold, or when the temperature of the starting battery module 1200 is greater than or equal to the second temperature threshold, determine whether the starting battery module is in a charging state according to the second battery information, and when the starting battery module is in a charging state, control the thermal management system 1400 to cool down the power battery module 1100 and the starting battery module 1200.

[0086] On this basis, the electronic control unit controls the thermal management system 1400 to stop cooling the power battery module 1100 and the starting battery module 1200 when it determines that the temperature of the power battery module 1100 is lower than the first temperature threshold and that the temperature of the starting battery module 1200 is lower than the second temperature threshold based on the first battery information and the second battery information.

[0087] In one embodiment of the present disclosure, Figures 3 to 5 As shown, the battery pack 1000 may also include a high-voltage distribution unit 1700 disposed in the first shell 1300 , a first end of the high-voltage distribution unit 1700 is connected to the power battery module 1100 , and a second end of the high-voltage distribution unit 1700 is connected to the high-voltage output end 1310 .

[0088] In this embodiment, the high-voltage distribution unit 1700 can distribute power to various high-voltage loads for supplying power according to the power provided by the power battery module.

[0089] In one embodiment of the present disclosure, Figures 2 to 5 As shown, the battery pack 1000 may further include a second shell 1800 disposed in the first shell 1300 , and the battery management system 1500 and the high-voltage distribution unit 1700 are both disposed in the second shell 1800 .

[0090] In this embodiment, the battery management system 1500 and the high-voltage power distribution unit 1700 are integrated into the second shell 1800, which can improve the integration level of the battery pack and facilitate integrated control and thermal management.

[0091] In one embodiment of the present disclosure, the second terminal of the second battery management system 1520 is connected to the starting battery module 1200 , and the third terminal of the second battery management system 1520 is connected to the low voltage output terminal.

[0092] In one embodiment of the present disclosure, the first communication interface 1331 and the second communication interface 1332 are provided by a connector.

[0093] The present disclosure also provides a vehicle, which may include the battery pack 1000 described in any of the aforementioned embodiments.

[0094] In one embodiment of the present disclosure, the vehicle may further include a low-voltage distribution unit and a low-voltage load. The low-voltage distribution unit may be disposed in the first shell 1300 of the battery pack 1000 or outside the first shell 1300 of the battery pack 1000, which is not limited here.

[0095] The first end of the low-voltage power distribution unit may be connected to the low-voltage output end 1320 of the battery pack 1000 , and the second end of the low-voltage power distribution unit may be connected to the low-voltage load.

[0096] Furthermore, a maintenance switch may be provided in the low-voltage power distribution unit, and the maintenance switch may be connected to the power supply circuit of the low-voltage load.

[0097] In this way, when repairing the vehicle, the maintenance switch can be disconnected to cut off the low-voltage power supply circuit.

[0098] In one embodiment of the present disclosure, the vehicle may further include an electronic control unit, which may be connected to a battery management system of the battery pack to obtain battery information of the power battery module 1100 and the starting battery module 1200 collected by the battery management system.

[0099] In one example, the electronic control unit may be connected to the first communication interface 1331 and the second communication interface 1332 of the battery pack 1000 to obtain first battery information of the power battery module 1100 and second battery information of the starting battery module 1200 .

[0100] The electronic control unit may also be connected to the thermal management system 1400 to control the thermal management system 1400 to perform heat exchange with the power battery module 1100 and / or the starting battery module 1200 according to the battery information.

[0101] Specifically, the electronic control unit is used to: when the vehicle is turned off, determine that the first condition is met according to the battery information, and control the thermal management system 1400 to perform heat exchange with the power battery module 1100 and / or the starting battery module 1200; when the vehicle is started, determine that the second condition is met according to the battery information, and control the thermal management system 1400 to perform heat exchange with the power battery module 1100 and / or the starting battery module 1200. The first condition is that the temperature of the power battery module 1100 exceeds the first temperature range and / or the temperature of the starting battery module 1200 exceeds the second temperature range, and the starting battery module 1200 is in a charging state; the second condition is that the temperature of the power battery module 1100 exceeds the first temperature range and / or the temperature of the starting battery module 1200 exceeds the second temperature range.

[0102] In this embodiment, a first temperature range corresponding to the power battery module 1100 and a second temperature range corresponding to the starting battery module 1200 may be pre-set.

[0103] In this embodiment, the control method of the electronic control unit can be as follows: Figure 6 shown.

[0104] When the vehicle is powered on, it is detected whether the temperature of the power battery module exceeds the first temperature range and / or whether the temperature of the starter battery module exceeds the second temperature range. If so, the thermal management system 1400 is controlled to operate, and the power battery module 1100 and the starter battery module 1200 are heated or cooled. During the operation of the heating management system 1400, if it is detected that the temperature of the power battery module is restored to the first temperature range and the temperature of the starter battery module is restored to the second temperature range, the thermal management system 1400 is controlled to stop operating.

[0105] When the vehicle is powered off, it is detected whether the temperature of the power battery module exceeds the first temperature range and / or whether the temperature of the starting battery module exceeds the second temperature range. If so, it is determined whether the starting battery module is in a charging state. When the starting battery module is in a charging state, the thermal management system 1400 is controlled to operate to heat or cool the power battery module 1100 and the starting battery module 1200. During the operation of the heating management system 1400, if it is detected that the temperature of the power battery module is restored to the first temperature range and the temperature of the starting battery module is restored to the second temperature range, the thermal management system 1400 is controlled to stop operating.

[0106] Among them, the maximum value of the first temperature range is the first temperature threshold, and the minimum value of the first temperature range is the third temperature threshold; the maximum value of the second temperature range is the second temperature threshold, and the minimum value of the second temperature range is the fourth temperature threshold.

[0107] The above embodiments mainly focus on describing the differences from other embodiments, but it should be clear to those skilled in the art that the above embodiments can be used alone or in combination with each other as needed.

[0108] Although some specific embodiments of the present invention have been described in detail by way of examples, it should be understood by those skilled in the art that the above examples are for illustration only and are not intended to limit the scope of the present invention. It should be understood by those skilled in the art that the above embodiments may be modified without departing from the scope and spirit of the present invention. The scope of the present invention is defined by the appended claims.

Claims

1. A battery pack, characterized in that: include: Power battery module; Start the battery module; A first shell, wherein the power battery module and the starting battery module are both arranged in the first shell, a high voltage output terminal and a low voltage output terminal are arranged on the first shell, the power battery module is connected to the high voltage output terminal, and the starting battery is connected to the low voltage output terminal.

2. The battery pack according to claim 1, characterized in that: Also includes: A thermal management system is arranged in the first shell, and the power battery module and the starting battery module are both arranged on a heat exchange circulation pipeline of the thermal management system. The thermal management system is used to perform heat exchange with the power battery module and / or the starting battery module through the heat exchange circulation pipeline.

3. The battery pack according to claim 2, characterized in that: The thermal management system includes a cold plate, the heat exchange circulation pipeline is arranged in the cold plate, and the cold plate covers the power battery module and the starting battery module.

4. The battery pack according to claim 2, characterized in that: The battery pack further comprises: A battery management system is arranged in the first shell, and the battery management system is used to collect battery information of the power battery module and the starting battery module and transmit it to the electronic control unit, so that the electronic control unit can control the thermal management system to perform heat exchange with the power battery module and / or the starting battery module according to the battery information.

5. The battery pack according to claim 4, characterized in that: The battery management system comprises a first battery management system, and a second end of the first battery management system is connected to the power battery module; A first communication interface is provided on the first housing, and a first end of the first battery management system is connected to the first communication interface; The first battery management system is used to collect first battery information of the power battery module and transmit the first battery information to the electronic control unit through the first communication interface.

6. The battery pack according to claim 5, characterized in that: The battery management system includes a second battery management system, and a second end of the second battery management system is connected to the starting battery module; A second communication interface is provided on the first housing, and a first end of the second battery management system is connected to the second communication interface; The second battery management system is used to collect second battery information of the starting battery module and transmit the second battery information to the electronic control unit through the second communication interface.

7. The battery pack according to claim 4, characterized in that: The battery pack further includes a high-voltage power distribution unit disposed in the first shell, a first end of the high-voltage power distribution unit is connected to the power battery module, and a second end of the high-voltage power distribution unit is connected to the high-voltage output end.

8. The battery pack according to claim 7, characterized in that: The battery pack further includes a second shell disposed inside the first shell, and the battery management system and the high-voltage power distribution unit are both disposed inside the second shell.

9. The battery pack according to claim 6, characterized in that: The second end of the second battery management system is connected to the starting battery module, and the third end of the second battery management system is connected to the low voltage output end.

10. The battery pack according to claim 6, characterized in that: The first communication interface and the second communication interface are provided by a connector.

11. The battery pack according to claim 1, characterized in that: The shape of the starting battery module is the same as that of the power battery module.

12. A vehicle, characterized in that: A battery pack comprising the battery pack as claimed in any one of claims 1 to 11.

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