Integrated battery pack and vehicle

Abstract

The utility model discloses an integrated battery pack and a vehicle. The integrated battery pack comprises a shell, a high-voltage power battery, a voltage converter and a low-voltage starting battery. The shell is provided with a cavity, the high-voltage power battery is arranged in the cavity, and the high-voltage power battery is used for being electrically connected with a high-voltage load. The voltage converter is arranged in the shell, and the voltage converter is electrically connected to the high-voltage power battery. The low-voltage starting battery is arranged in the cavity, the low-voltage starting battery is electrically connected to the voltage converter, and the low-voltage starting battery is used for being electrically connected with a low-voltage load. According to the integrated battery pack provided by the utility model, the high-voltage power battery, the voltage converter and the low-voltage starting battery are integrated in the shell, and the shell, a heat management structure, a connecting wire harness and a wiring terminal do not need to be independently arranged for the three batteries, so that the cost is reduced. In addition, the design improves the integration level and reduces the overall size.

Description

Technical Field

[0001] The utility model relates to the technical field of battery packs, and in particular to an integrated battery pack. Background Art

[0002] The battery packs used in vehicles currently on the market include three modules: a high-voltage power battery, a voltage converter, and a low-voltage starting battery. The three modules are usually arranged in three shells respectively, with a large overall volume. In addition, the modules are inconvenient to arrange on the vehicle and need to be interconnected through long wiring harnesses and complex wiring terminals. Thermal management structures also need to be set up separately in the high-voltage power battery and low-voltage starting battery modules, which makes the overall structure of the system complex, the wiring is redundant and messy, and the system cost is increased.

[0003] In view of this, the present utility model is proposed. Utility Model Content

[0004] The utility model provides an integrated battery pack and a vehicle.

[0005] The utility model adopts the following technical solutions:

[0006] The first object of the present application is to provide an integrated battery pack, comprising:

[0007] a housing having a cavity;

[0008] A high-voltage power battery, the high-voltage power battery is disposed in the cavity, and the high-voltage power battery is used to electrically connect to a high-voltage load;

[0009] A voltage converter, the voltage converter is disposed in the housing, and the voltage converter is electrically connected to the high-voltage power battery;

[0010] A low-voltage starting battery is disposed in the cavity, the low-voltage starting battery is electrically connected to the voltage converter, and the low-voltage starting battery is used to electrically connect to a low-voltage load.

[0011] Preferably, a temperature control device is included;

[0012] The temperature control device is arranged in the cavity, and is used to adjust the temperature of the high-voltage power battery and the low-voltage starting battery.

[0013] Preferably, the temperature control device comprises a water cooling plate;

[0014] The water cooling plate is located in the cavity;

[0015] The high-voltage power battery and the low-voltage starting battery are both attached to the water cooling plate.

[0016] Preferably, it comprises an inner bracket, the inner bracket is located in the cavity, and the inner bracket is fixed to the outer shell;

[0017] At least one of the high-voltage power battery, the low-voltage starting battery and the voltage converter is fixed on the inner bracket.

[0018] Preferably, the low-voltage starting battery is located on one side of the high-voltage power battery along the width direction.

[0019] Preferably, it comprises a high voltage box, the high voltage box is arranged in the cavity, and the high voltage box has the voltage converter;

[0020] The high voltage box is connected to the high voltage power battery and the low voltage starting battery respectively.

[0021] Preferably, the high voltage box is arranged on one side of the high voltage power battery along the width direction.

[0022] Preferably, the high-voltage box and the low-voltage starting battery are arranged in sequence along the length direction of the high-voltage power battery.

[0023] Preferably, a high-voltage connector and a low-voltage connector are provided on the housing;

[0024] The low-voltage starting battery is electrically connected to the low-voltage connector;

[0025] The high-voltage power battery is connected to the high-voltage connector.

[0026] The second object of the present application is to provide a vehicle, comprising:

[0027] Vehicle body;

[0028] A high-voltage load, the high-voltage load is arranged on the vehicle body, and the high-voltage load includes a main drive motor;

[0029] The integrated battery pack described above, the casing is installed on the vehicle body, the high-voltage power battery is electrically connected to the high-voltage load, the low-voltage starting battery is electrically connected to the vehicle body and / or the low-voltage load on the integrated battery pack, and the low-voltage load includes one or more of a lamp body, a parking air conditioner, a BMS, a hybrid controller, a DCDC control board, a relay, a starter and a contactor.

[0030] By adopting the above technical solution, the utility model has the following beneficial effects:

[0031] The integrated battery pack of this patent application integrates the high-voltage power battery, voltage converter and low-voltage starting battery into one housing, eliminating the need to separately set up housings, thermal management structures, connecting harnesses and terminals for the three, thus reducing costs. This design also improves integration and reduces the overall volume.

[0032] The specific implementation of the utility model is further described in detail below in conjunction with the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] The accompanying drawings are part of this application and are used to provide a further understanding of the utility model. The schematic embodiments of the utility model and their descriptions are used to explain the utility model, but do not constitute an improper limitation on the utility model. Obviously, the drawings described below are only some embodiments. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work. In the drawings:

[0034] Figure 1 A schematic diagram of the structure of an integrated battery pack provided in Example 1 of the present application;

[0035] Figure 2 A schematic diagram of the arrangement structure of each internal module of the integrated battery pack provided in Example 1 of the present application;

[0036] Figure 3 A schematic diagram of the structural arrangement of an integrated battery pack provided in Example 2 of the present application;

[0037] Figure 4 A schematic diagram of a partial structural arrangement of a vehicle provided in Embodiment 3 of the present application when the BMS is removed;

[0038] Figure 5 This is a schematic diagram of the partial structural layout of a vehicle provided with a BMS as provided in Example 3 of the present application.

[0039] In the figure, the outer shell 1, the high-voltage power battery 2, the high-voltage box 3, the voltage converter 31, the low-voltage starting battery 4, the water-cooling plate 5, the inner bracket 6, the vehicle body 7, the high-voltage load 8, the high-voltage connector 81, the low-voltage load 9, the low-voltage connector 91, the PTC heating film 10, the generator 11, the water-cooling unit 12, the engine 13, and the BMS 14.

[0040] It should be noted that these drawings and textual descriptions are not intended to limit the conceptual scope of the present invention in any way, but rather to illustrate the concept of the present invention for those skilled in the art by referring to specific embodiments. DETAILED DESCRIPTION

[0041] In order to make the purpose, technical solutions and advantages of the embodiments of the utility model clearer, the technical solutions in the embodiments will be clearly and completely described below in conjunction with the drawings in the embodiments of the utility model. The following embodiments are used to illustrate the utility model but are not used to limit the scope of the utility model.

[0042] In the description of the present invention, it should be noted that the terms "upper", "lower", "inside", "outside", etc. indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or component referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation on the present invention.

[0043] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation" and "connection" 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 an indirect connection through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0044] Embodiment 1

[0045] See also Figure 1-2 As shown, an embodiment of the present application provides an integrated battery pack, including a housing 1, a high-voltage power battery 2, a voltage converter 31 and a low-voltage starting battery 4. The housing 1 has a cavity, the high-voltage power battery 2 is arranged in the cavity, and the high-voltage power battery 2 is used to electrically connect to a high-voltage load 8. The voltage converter 31 is arranged in the housing 1, and the voltage converter 31 is electrically connected to the high-voltage power battery 2. The low-voltage starting battery 4 is arranged in the cavity, and the low-voltage starting battery 4 is electrically connected to the voltage converter 31, and the low-voltage starting battery 4 is used to electrically connect to a low-voltage load 9. The integrated battery pack of the present application integrates the high-voltage power battery 2, the voltage converter 31 and the low-voltage starting battery 4 in a housing 1, and there is no need to provide a separate housing 1, thermal management structure, connecting harness and terminal for the three, thereby reducing costs. And such a design improves the integration, reduces the overall volume, and is more convenient for later arrangement on the vehicle.

[0046] The voltage converter 31 can transmit the electric energy of the high voltage part to the low voltage starting battery 4 to charge the low voltage starting battery 4 .

[0047] In a possible implementation, the integrated battery pack further includes a temperature control device. The temperature control device is disposed in the cavity and is used to adjust the temperature of the high-voltage power battery 2 and the low-voltage starting battery 4. The high-voltage power battery 2 and the low-voltage starting battery 4 can use the same set of temperature control devices and the same thermal management solution, thereby reducing costs.

[0048] In a possible implementation, the temperature control device includes a water cooling plate 5. The water cooling plate 5 is located in the cavity, and the high-voltage power battery 2 and the low-voltage starting battery 4 are both attached to the water cooling plate 5. Using one water cooling plate 5 can simultaneously control the temperature of the high-voltage power battery 2 and the low-voltage starting battery 4, avoiding the need to separately set up the water cooling plate 5 or the need to separately set up the water cooling transfer structure.

[0049] In a possible implementation, the integrated battery pack further includes an inner bracket 6, which is located in the cavity and fixed to the outer shell 1. At least one of the high-voltage power battery 2, the low-voltage starting battery 4 and the voltage converter 31 is fixed to the inner bracket 6. A water cooling channel is provided inside the water-cooling plate 5, and it is not suitable to provide a connecting structure on the water-cooling plate 5. Therefore, an inner bracket 6 is provided to connect the outer shell 1 with the high-voltage power battery 2 and the low-voltage starting battery 4, so as to ensure that the connection between the high-voltage power battery 2 and the low-voltage starting battery 4 is stable. The high-voltage power battery 2 and the low-voltage starting battery 4 can be connected to the top plate or side plate of the outer shell 1 by respectively providing inner brackets, or the high-voltage power battery 2 and the low-voltage starting battery 4 can be connected to the top plate or side plate of the outer shell 1 using the same inner bracket.

[0050] In a possible implementation, the low-voltage starting battery 4 is located on one side of the high-voltage power battery 2 along the width direction. This layout is more reasonable and saves more space, and the small size makes it easier to arrange the integrated battery pack on a carrier such as a vehicle.

[0051] In a possible implementation, the integrated battery pack includes a high-voltage box 3, which is disposed in the cavity and has the voltage converter 31. The high-voltage box 3 is connected to the high-voltage power battery 2 and the low-voltage starting battery 4, respectively.

[0052] In a possible implementation, the high voltage box 3 is disposed on one side of the high voltage power battery 2 along the width direction.

[0053] In a possible implementation, the high-voltage box 3 and the low-voltage starting battery 4 are arranged in sequence along the length direction of the high-voltage power battery 2. Because the low-voltage starting battery 4 and the high-voltage box 3 are much smaller in volume than the high-voltage power battery 2, the high-voltage box 3 can be placed side by side with the low-voltage starting battery 4 on one side of the high-voltage power battery 2 along the width direction, which is a reasonable layout and saves space.

[0054] In a possible implementation, a high voltage connector 81 and a low voltage connector 91 are provided on the housing 1. The low voltage starting battery 4 is electrically connected to the low voltage connector 91, and the high voltage power battery 2 is connected to the high voltage connector 81. The high voltage connector 81 and the low voltage connector 91 are integrated on the same side wall of the housing 1, which is more convenient for wiring and neater for wiring.

[0055] Embodiment 2

[0056] See also Figure 3 As shown, on the basis of the first embodiment, the integrated battery pack further includes a heating device and a generator 11. The heating device is located in the cavity, and the heating device is used to heat the high-voltage power battery 2 and the low-voltage starting battery, and the generator 11 is electrically connected to the heating device. In this embodiment, a generator 11 is provided, and when the vehicle is started, the engine 13 is started, and the engine 13 generates electricity through the generator 11, and the generator 11 provides energy for the heating device. In this way, as long as the engine 13 is started, the high-voltage power battery 2 and the low-voltage starting battery 4 will be heated by the heating device, so that the high-voltage power battery 2 and the low-voltage starting battery 4 can always be at a suitable charging temperature without the power of the high-voltage power battery 2. When the high-voltage power battery 2 recovers power and the low-voltage starting battery 4 is charged, both immediately enter the optimal charging state, which protects the battery, prevents the battery from entering a state of severe power shortage, and prolongs the battery life. The following problems will not occur:

[0057] Non-plug-in battery packs cannot be charged with high voltage through charging piles (mainly through energy recovery from vehicle braking). The energy of the PTC heating film 10 in the battery system comes from the high-voltage power battery 2. This type of vehicle will start the high-voltage power battery 2 many times but will not shut down the high-voltage power battery 2 after driving for a long enough time and distance, which will repeatedly heat the battery and consume the power of the high-voltage power battery 2. The battery can hardly be charged at low temperatures, and it cannot be supplemented with electricity, which will enter a vicious cycle and eventually cause the high-voltage system to be in a serious power shortage state. If the vehicle is parked for a long time, the battery may be scrapped.

[0058] In a possible implementation, the generator 11 is located outside the housing 1, and the generator 11 is electrically connected to the heating device through a cable. In this way, the generator 11 is isolated from the high-voltage power battery 2 and the low-voltage starting battery 4, and the operation of the generator 11 will not affect the high-voltage power battery 2 and the low-voltage starting battery 4.

[0059] In a possible implementation, the heating device includes a plurality of PTC heating films 10, some of which are arranged on the high-voltage power battery 2, and some of which are arranged on the low-voltage starting battery 4. The plurality of PTC heating films 10 can heat both the high-voltage power battery 2 and the low-voltage starting battery 4, so that both the high-voltage power battery 2 and the low-voltage starting battery 4 are always kept at a temperature suitable for charging, so that the charging efficiency is higher and the charging loss rate is reduced.

[0060] In a possible implementation, a water cooling unit 12 is further included. The water cooling unit 12 is located outside the housing 1 and is connected to the water cooling plate 5 through a pipeline. If the high-voltage power battery 2 and the low-voltage starting battery 4 continue to work and generate a lot of heat, the water cooling unit 12 provides a relatively low-temperature liquid to the water cooling plate 5 to cool the high-voltage power battery 2 and the low-voltage starting battery 4.

[0061] In a possible implementation, the battery system further includes a BMS 14, a temperature sensor is provided on the high-voltage power battery 2, and the BMS 14 is electrically connected to the temperature sensor, the heating device, and the water cooling unit 12. The BMS 14 is a controller, which can determine and control one of the heating device and the water cooling unit 12 to operate or neither of them to operate by receiving the temperature measured by the temperature sensor.

[0062] In a possible implementation, the water cooling unit 12 comprises a water cooling pipe, a cooling device and a water pump arranged on the water cooling pipe. The water cooling pipe is connected to the water cooling plate 5, and the water pump is arranged on the water cooling pipe. The battery system has a balanced temperature mode in which the water pump is running and the cooling device is stopped.

[0063] When the temperature of the high-voltage power battery 2 and the low-voltage starting battery 4 is too high, the BMS 14 of the high-voltage power battery 2 sends a cooling command to the external water cooling unit 12 through the CAN bus. The water cooling unit 12 starts cooling and reduces the coolant to a certain temperature. The coolant is connected to the water cooling plate 5 inside the outer shell 1 through two water pipes connected to the outside of the outer shell 1, thereby cooling the internal battery cells.

[0064] When the temperature of the high-voltage power battery 2 and the low-voltage starting battery 4 is too low, the battery's charge and discharge capabilities at low temperatures are poor. At this time, the BMS 14 closes the switch of the PTC heating film 10 to heat the battery. When the battery reaches the appropriate temperature, the switch is disconnected. At this time, the battery can be charged and discharged at a normal rate.

[0065] When the temperature difference of battery cells is large, the battery may be neither in cooling mode nor in heating mode. Only the water pump in the water cooling unit 12 can be started to enter the balanced temperature mode, and heat can be exchanged only through the circulation of water flow, which can reduce the temperature difference of the battery system.

[0066] Embodiment 3

[0067] See also Figure 4-5As shown, an embodiment of the present application provides a vehicle, including a vehicle body 7, a high-voltage load 8 and an integrated battery pack as described in Example 1. The high-voltage load 8 is arranged on the vehicle body 7, and the high-voltage load 8 includes a main drive motor. The housing 1 is installed on the vehicle body 7, the high-voltage power battery 2 is electrically connected to the high-voltage load 8 through a high-voltage connector 81, and the low-voltage starting battery 4 is electrically connected to the vehicle body 7 and / or the low-voltage load 9 on the integrated battery pack through a low-voltage connector 91, and the low-voltage load 9 includes one or more of a lamp body, a parking air conditioner, a BMS14, a hybrid controller, a DCDC control board, a relay, a starter and a contactor. The high-voltage power battery 2, the voltage converter 31 and the low-voltage starting battery 4 on the vehicle are all integrated into an integrated battery pack in a housing 1. The integrated battery pack is small in size and is more convenient to arrange on the vehicle body 7, which is convenient for the arrangement of other structural modules on the vehicle, and the wiring is neat, and the installation is more convenient.

[0068] Among them, the main drive motor included in the high-voltage load 8 and the lamp body, parking air conditioner, BMS14, hybrid controller, DCDC control board, relay, starter and contactor included in the low-voltage load 9 are some common structures in the prior art, and their functions are well-known. They do not belong to the invention of this application and will not be explained in detail here.

[0069] In a possible implementation, the vehicle body 7 has an engine 13, the housing 1 is disposed on the vehicle body 7, and the generator 11 is connected to the engine 13 by transmission. The engine 13 can drive the generator 11 to generate electricity. The vehicle of this embodiment uses a battery system having a generator 11 that can provide energy for the heating device, so that the high-voltage power battery 2 and the low-voltage starting battery 4 equipped on the vehicle are always at a suitable charging temperature. In this way, as long as there is energy to be recovered, the high-voltage power battery 2 can recover energy to the maximum extent, so that the energy saving effect of the vehicle is better. Belt transmission can be used between the engine 13 and the generator 11.

[0070] The above is only a preferred embodiment of the utility model, and does not limit the utility model in any form. Although the utility model has been disclosed as a preferred embodiment as above, it is not used to limit the utility model. Any technician familiar with this patent can make some changes or modify the technical content suggested above into an equivalent embodiment with equivalent changes without departing from the scope of the technical solution of the utility model. However, any simple modification, equivalent change and modification made to the above embodiment based on the technical essence of the utility model without departing from the content of the technical solution of the utility model still falls within the scope of the solution of the utility model.

Claims

1. An integrated battery pack, characterized in that: include: a housing having a cavity; A high-voltage power battery, the high-voltage power battery is disposed in the cavity, and the high-voltage power battery is used to electrically connect to a high-voltage load; A voltage converter, the voltage converter is disposed in the housing, and the voltage converter is electrically connected to the high-voltage power battery; A low-voltage starting battery is disposed in the cavity, the low-voltage starting battery is electrically connected to the voltage converter, and the low-voltage starting battery is used to electrically connect to a low-voltage load.

2. The integrated battery pack according to claim 1, characterized in that: Including temperature control device; The temperature control device is arranged in the cavity, and is used to adjust the temperature of the high-voltage power battery and the low-voltage starting battery.

3. The integrated battery pack according to claim 2, characterized in that: The temperature control device includes a water cooling plate; The water cooling plate is located in the cavity; The high-voltage power battery and the low-voltage starting battery are both attached to the water cooling plate.

4. The integrated battery pack according to claim 3, characterized in that: comprising an inner bracket, the inner bracket being located in the cavity and fixed to the outer shell; At least one of the high-voltage power battery, the low-voltage starting battery and the voltage converter is fixed on the inner bracket.

5. The integrated battery pack according to claim 4, characterized in that: The low-voltage starting battery is located on one side of the high-voltage power battery along the width direction.

6. The integrated battery pack according to claim 5, characterized in that: It comprises a high-voltage box, the high-voltage box is arranged in the cavity, and the high-voltage box has the voltage converter; The high voltage box is connected to the high voltage power battery and the low voltage starting battery respectively.

7. The integrated battery pack according to claim 6, characterized in that: The high voltage box is arranged on one side of the high voltage power battery along the width direction.

8. The integrated battery pack according to claim 7, characterized in that: The high-voltage box and the low-voltage starting battery are arranged in sequence along the length direction of the high-voltage power battery.

9. The integrated battery pack according to claim 1, characterized in that: The housing is provided with a high-voltage connector and a low-voltage connector; The low-voltage starting battery is electrically connected to the low-voltage connector; The high-voltage power battery is connected to the high-voltage connector.

10. A vehicle, characterized in that: include: Vehicle body; A high-voltage load, the high-voltage load is arranged on the vehicle body, and the high-voltage load includes a main drive motor; According to any one of claims 1 to 9, the housing is mounted on the vehicle body, the high-voltage power battery is electrically connected to the high-voltage load, and the low-voltage starting battery is electrically connected to the vehicle body and / or the low-voltage load on the integrated battery pack, wherein the low-voltage load includes one or more of a lamp body, a parking air conditioner, a BMS, a hybrid controller, a DCDC control board, a relay, a starter, and a contactor.

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