Battery system and vehicle

Abstract

The utility model discloses a battery system and a vehicle. The battery system comprises a shell, a high-voltage power battery, a low-voltage starting battery, a heating device and a generator. 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. And the low-voltage starting battery is arranged in the cavity and is used for being electrically connected with a low-voltage load. The heating device is located in the cavity and used for heating the high-voltage power battery and the low-voltage power battery, and the generator is electrically connected to the heating device. According to the battery system, as long as the engine starts the high-voltage power battery and the low-voltage starting battery, the temperature suitable for charging can be kept constantly without the electric quantity of the high-voltage power battery, the high-voltage power battery recovers the electric quantity, and the low-voltage starting battery enters the optimal charging state immediately when being charged, so that the batteries are protected; the battery is prevented from entering a serious power shortage state, and the service life of the battery is prolonged.

Description

Technical Field

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

[0002] When the battery temperature is too low, the battery's charging and discharging capabilities at low temperatures are poor. Therefore, in the battery system, both the high-voltage power battery and the low-voltage starting battery are equipped with PTC heating films to heat the battery when the battery temperature is too low. Non-plug-in battery packs cannot be charged with high voltage through charging piles (mainly charged through energy recovery from vehicle braking). The energy of the PTC heating film in the battery system comes from the high-voltage power battery. This type of vehicle will start the high-voltage power battery many times but will not shut down the high-voltage power battery 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. The battery can hardly be charged at low temperatures, and it cannot be replenished with electricity, which will enter a vicious cycle and eventually cause the high-voltage system to be in a state of severe power shortage. If the vehicle is parked for a long time, the battery may be scrapped.

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

[0004] The utility model provides a battery system and a vehicle.

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

[0006] The first object of the present application is to provide a battery system, 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 low-voltage starting battery, the low-voltage starting battery is arranged in the cavity, and the low-voltage starting battery is used to electrically connect a low-voltage load;

[0010] A heating device, the heating device is located in the cavity, and the heating device is used to heat the high-voltage power battery and the low-voltage power battery;

[0011] A generator is electrically connected to the heating device.

[0012] Optionally, the generator is located outside the housing, and the generator is electrically connected to the heating device via a cable.

[0013] Optionally, the heating device includes a plurality of PTC heating films, some of the PTC heating films are arranged on the high-voltage power battery, and some of the PTC heating films are arranged on the low-voltage starting battery.

[0014] Optionally, a water cooling plate is included;

[0015] The water cooling plate is located in the cavity;

[0016] The high-voltage power battery and the low-voltage starting battery are both attached to the water cooling plate.

[0017] Optionally, a water-cooling unit is included;

[0018] The water cooling unit is located outside the shell, and the water cooling unit is connected to the water cooling plate through a pipeline.

[0019] Optionally, a BMS is included, a temperature sensor is provided on the high-voltage power battery, and the BMS is electrically connected to the temperature sensor, the heating device and the water cooling unit respectively.

[0020] Optionally, the water cooling unit comprises a water cooling pipe, a cooling device and a water pump arranged on the water cooling pipe;

[0021] The water cooling pipe is connected to the water cooling plate;

[0022] The water pump is arranged on the water cooling pipe;

[0023] The battery system has an equalization temperature mode in which the water pump operates and the cooling device stops operating.

[0024] Optionally, a voltage converter is included, wherein the voltage converter is arranged in the cavity, and the voltage converter is electrically connected to the high-voltage power battery and the low-voltage starting battery respectively.

[0025] The second object of the present application is to provide a vehicle, comprising:

[0026] a vehicle body, the vehicle body having an engine;

[0027] In the battery system as described above, the housing is arranged on the vehicle body, and the generator is drivingly connected to the engine.

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

[0029] The high-voltage power battery is electrically connected to the high-voltage load, and the low-voltage power battery is electrically connected to the low-voltage load on the vehicle body and / or the battery system. 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 battery system of the present application is provided with a generator. When the vehicle is started and the engine is started, the engine will generate electricity through the generator, and the generator will provide energy for the heating device. In this way, as long as the engine is started, the high-voltage power battery and the low-voltage starting battery will be heated by the heating device, so that the high-voltage power battery and the low-voltage starting battery can always be at a suitable charging temperature without the power of the high-voltage power battery. When the high-voltage power battery recovers power and the low-voltage starting battery 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.

[0032] The specific implementation of the utility model is further described in detail below with reference to 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 a battery system provided in Example 1 of the present application;

[0035] Figure 2 A schematic diagram of the structural arrangement of the battery system provided in the first embodiment of the present application when the BMS 14 is removed;

[0036] Figure 3 A schematic diagram of the structural arrangement of a battery system provided in Example 1 of the present application;

[0037] Figure 4 A schematic diagram of a partial structural arrangement of a vehicle provided in Embodiment 2 of the present application when the BMS 14 is removed;

[0038] Figure 5 This is a schematic diagram of the partial structural arrangement of a vehicle provided with a BMS 14 provided in the second embodiment 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 Figures 1 to 3As shown, an embodiment of the present application provides a battery system, including a housing 1, a high-voltage power battery 2, a low-voltage starting battery 4, a heating device and a generator 11. 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 low-voltage starting battery 4 is arranged in the cavity, and the low-voltage starting battery 4 is used to electrically connect to a low-voltage load 9. 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 power battery, and the generator 11 is electrically connected to the heating device. A generator 11 is provided in the battery system of the present application. 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 need for 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, they will immediately enter the optimal charging state, thereby protecting the battery, preventing the battery from entering a state of severe power shortage, and extending the battery life.

[0046] In addition, the high-voltage power battery 2, the voltage converter 31 and the low-voltage starting battery 4 are all integrated in one housing 1, so there is no need to provide separate housings 1, thermal management structures, connecting harnesses and terminals for the three, thus reducing costs. In addition, this design improves integration, reduces the overall volume, and is more convenient for later deployment on the vehicle.

[0047] The voltage converter 31 transmits the electric energy of the high voltage part to the low voltage starting battery 4 to charge the low voltage starting battery 4 .

[0048] 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.

[0049] 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.

[0050] In a possible implementation, the battery further 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. 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 plate 5 can cool the high-voltage power battery 2 and the low-voltage starting battery 4.

[0051] In a possible implementation, the battery system further includes a water cooling unit 12. The water cooling unit 12 is located outside the housing 1 and is connected to the water cooling plate 5 through a pipeline. The water cooling unit 12 provides liquid with a relatively low temperature to the water cooling plate 5 to cool the high-voltage power battery 2 and the low-voltage starting battery 4.

[0052] 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.

[0053] 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.

[0054] 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 of the PACK box through two water pipes connected to the outside of the PACK box, thereby cooling the internal battery cells.

[0055] 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.

[0056] When the temperature difference of the 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 exchange heat only through the circulation of water flow, which can reduce the temperature difference of the battery system.

[0057] In a possible implementation, the battery system further includes a voltage converter 31, which is disposed in the cavity and electrically connected to the high-voltage power battery 2 and the low-voltage starting battery 4. The voltage converter 31 transmits the electric energy of the high-voltage part to the low-voltage starting battery 4 to charge the low-voltage starting battery 4.

[0058] In a possible implementation, the battery system 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 circuitous water cooling channel is provided inside the water-cooling plate 5, on which it is not suitable to set a connection structure. 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 separately setting 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 bracket.

[0059] 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.

[0060] 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.

[0061] 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.

[0062] 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.

[0063] 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 one housing 1 at the same time, which is more convenient for wiring and neater for wiring.

[0064] Embodiment 2

[0065] See also Figure 4-5 As shown, an embodiment of the present application provides a vehicle, including a vehicle body 7 and a battery system as described in Embodiment 1. The vehicle body 7 has an engine 13, the housing 1 is disposed on the vehicle body 7, and the generator 11 is transmission-connected to the engine 13. 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 a 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 temperature suitable for charging. 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.

[0066] In a possible implementation, the vehicle further includes a high-voltage load 8, which is disposed on the vehicle body 7 and includes a main drive motor. The high-voltage power battery 2 is electrically connected to the high-voltage load 8, and the low-voltage power battery is electrically connected to a low-voltage load 9 on the vehicle body 7 and / or the battery system, and the low-voltage load 9 includes one or more of a lamp body, a parking air conditioner, a BMS 14, a hybrid controller, a DCDC control board, a relay, a starter, and a contactor.

[0067] 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.

[0068] 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. A battery system, 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 low-voltage starting battery, the low-voltage starting battery is arranged in the cavity, and the low-voltage starting battery is used to electrically connect a low-voltage load; A heating device, the heating device is located in the cavity, and the heating device is used to heat the high-voltage power battery and the low-voltage power battery; A generator is electrically connected to the heating device.

2. The battery system according to claim 1, characterized in that: The generator is located outside the housing, The generator is electrically connected to the heating device through a cable.

3. The battery system according to claim 1, characterized in that: The heating device includes a plurality of PTC heating films, some of which are arranged on the high-voltage power battery, and some of which are arranged on the low-voltage starting battery.

4. The battery system according to claim 1, characterized in that: Including 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.

5. The battery system according to claim 4, characterized in that: Including water cooling unit; The water cooling unit is located outside the shell, and the water cooling unit is connected to the water cooling plate through a pipeline.

6. The battery system according to claim 5, characterized in that: It includes a BMS, a temperature sensor is arranged on the high-voltage power battery, and the BMS is electrically connected to the temperature sensor, the heating device and the water cooling unit respectively.

7. The battery system according to claim 5, characterized in that: The water cooling unit 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; The water pump is arranged on the water cooling pipe; The battery system has an equalization temperature mode in which the water pump operates and the cooling device stops operating.

8. The battery system according to any one of claims 1 to 7, characterized in that: It includes a voltage converter, which is arranged in the cavity and is electrically connected to the high-voltage power battery and the low-voltage starting battery respectively.

9. A vehicle, characterized in that: include: a vehicle body, the vehicle body having an engine; According to the battery system as described in any one of claims 1-8, the housing is arranged on the vehicle body, and the generator is transmission-connected to the engine.

10. The vehicle according to claim 9, characterized in that comprising a high-voltage load, the high-voltage load being arranged on the vehicle body, the high-voltage load comprising a main drive motor; The high-voltage power battery is electrically connected to the high-voltage load, and the low-voltage power battery is electrically connected to the low-voltage load on the vehicle body and / or the battery system. 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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