Battery pack, drive-by-wire chassis and vehicle

Abstract

The utility model relates to the technical field of batteries, and provides a battery pack, a drive-by-wire chassis and a vehicle, the battery pack comprises a battery pack shell, a battery module, a control panel and a liquid cooling plate, the battery pack shell forms a mounting cavity, the battery module and the control panel are both arranged in the mounting cavity, the control panel is electrically connected with the battery module to carry out power supply management on the battery module, and the liquid cooling plate is electrically connected with the battery module. And the liquid cooling plate is used for cooling the battery module and the integrated control panel in a partitioned manner, so that the heat dissipation arrangement of the battery module and the integrated control panel is simplified, the heat dissipation integration level is improved, and a relatively good heat dissipation effect is achieved.

Description

Technical Field

[0001] The present utility model relates to the technical field of batteries, and specifically, to a battery pack. In addition, the present utility model also relates to a wire-controlled chassis and a vehicle. Background Art

[0002] The chassis system of a traditional fuel vehicle consists of four parts: drive, transmission, steering, and braking. There are many mechanical and hydraulic components, and the structure is complex, which cannot meet the requirements of high-level autonomous driving for vehicle controllability and active safety; through signal transmission by wire harness + direct drive by motor, efficient and precise control of the actuator can be achieved, and the electric intelligent upgrade of the chassis subsystem drives the growth of wire-controlled systems such as wire-controlled drive, wire-controlled suspension, wire-controlled steering, and wire-controlled braking.

[0003] With the development of wire control technology, wire-controlled chassis are gradually applied in the field of low-speed unmanned vehicles. Existing low-speed unmanned vehicles load a power battery pack on the vehicle frame to provide high voltage for the chassis, and a control board is correspondingly provided for power supply control. During the use of the power battery pack, both the power battery pack and the control board generate heat, but due to the complicated heat dissipation arrangement of the two, the heat dissipation effect is poor. Summary of the Utility Model

[0004] The technical problem to be solved by the present utility model is to provide a battery pack, a wire-controlled chassis and a vehicle, in which the battery module and the control board are arranged on a liquid cooling plate, simplifying the heat dissipation arrangement, improving the heat dissipation integration, and having a good heat dissipation effect.

[0005] To solve the above technical problem, the first aspect of the present utility model provides a battery pack, including:

[0006] A battery pack housing, the battery pack housing forming an installation cavity;

[0007] A battery module, the battery module being disposed in the installation cavity;

[0008] A control board, the control board being disposed in the installation cavity, the control board being electrically connected to the battery module;

[0009] A liquid cooling plate, the liquid cooling plate being used for partitioning heat dissipation of the battery module and the control board.

[0010] In some specific embodiments, the liquid cooling plate includes a first flow channel area and a second flow channel area. The first flow channel area is arranged corresponding to the battery module for heat dissipation of the battery module, and the second flow channel area is arranged corresponding to the connector for heat dissipation of the connector.

[0011] In some specific embodiments, a heating sheet is provided in the first flow channel area.

[0012] In some specific embodiments, a heat insulation sheet is provided between the first flow channel area and the second flow channel area.

[0013] In some specific embodiments, the liquid cooling plate is configured as a part of the battery pack housing, and the battery pack housing further includes a battery pack frame and a cover plate. The liquid cooling plate and the cover plate are respectively disposed on two sides of the battery pack frame to enclose the installation cavity.

[0014] In some specific embodiments, a balance valve is provided on the outer side of the battery pack frame, and the balance valve is used to communicate the installation cavity with the outside.

[0015] In some specific embodiments, an EVA foam is provided on one side of the cover plate located in the installation cavity.

[0016] In some specific embodiments, the battery module includes a high-voltage battery module and a low-voltage battery module.

[0017] In some specific embodiments, a connector is further included. The connector includes a high-voltage connector and a low-voltage connector. The high-voltage connector is electrically connected to the high-voltage battery module, the low-voltage connector is electrically connected to the low-voltage battery module, and the control board is electrically connected to the high-voltage connector and the low-voltage connector respectively.

[0018] In some specific embodiments, the single battery of the high-voltage battery module is a square battery, and the single battery includes a battery body. The thickness D of the battery body and the volume V of the battery body satisfy: D / V = 0.0000065 - 0.00002 mm -2 。

[0019] In some specific embodiments, the single battery of the low-voltage battery module is a square battery, and the single battery includes a battery body. The thickness D of the battery body and the volume V of the battery body satisfy: D / V = 0.0000065 - 0.00002 mm -2 。

[0020] The second aspect of the present invention provides a steer-by-wire chassis, including the above battery pack.

[0021] In some specific embodiments, the battery pack housing is provided with a frame joint, and the frame joint is used to connect the front subframe and the rear subframe to cooperate to form a chassis frame.

[0022] The third aspect of the present invention provides a vehicle, including the above battery pack or the above steer-by-wire chassis.

[0023] Through the above solutions, the beneficial effects of the present invention are as follows:

[0024] In this utility model, both the battery module and the control board are arranged in the installation cavity. The liquid cooling plate can control the partitioned heat dissipation of the two, simplifying the heat dissipation arrangement of the battery module and the control board. While facilitating the arrangement of the liquid cooling plate, it also ensures a good heat dissipation effect.

[0025] In addition, this utility model also integrates the high-voltage battery module and the low-voltage battery module together and places them jointly in the battery pack housing. There is no need to additionally set up a lead-acid battery, effectively reducing the overall mass of the chassis and saving the space occupied by the chassis. At the same time, the control board is also integrated in the battery pack housing, and can jointly connect to each control system of the wire-controlled chassis through a connector, further improving the integration level.

[0026] Other features and advantages of this utility model will be described in detail in the subsequent specific implementation section. Description of the Drawings

[0027] The drawings are used to provide a further understanding of this utility model and constitute a part of the specification. Together with the following specific implementation, they are used to explain this utility model, but do not constitute a limitation to this utility model. In the drawings:

[0028] Figure 1 is an exploded view of a specific embodiment of the battery pack of this utility model;

[0029] Figure 2 is a top view of a specific embodiment of the battery pack of this utility model;

[0030] Figure 3 is a structural schematic diagram of a specific embodiment of the wire-controlled chassis of this utility model.

[0031] Description of the Reference Numerals in the Drawings

[0032] 1. Battery pack; 2. Frame joint; 3. Cover plate; 4. Front subframe; 5. Rear subframe; 6. Balance valve; 7. High-voltage connector; 8. Low-voltage connector; 9. Liquid cooling plate; 10. Battery pack frame; 11. Wiring harness; 12. Control board; 13. High-voltage battery module; 14. Low-voltage battery module. Specific Embodiment

[0033] The following details the specific embodiments of this utility model in conjunction with the drawings. It should be understood that the specific embodiments described herein are only used to illustrate and explain this utility model, and the protection scope of this utility model is not limited to the following specific embodiments.

[0034] In the description of the present utility model, it should be noted that unless otherwise clearly specified and defined, terms such as "formed", "provided with", "set", "connected", etc. should be understood in a broad sense. For example, the connection can be a direct connection, or an indirect connection through an intermediate medium, which can be a fixed connection, a detachable connection, or an integral connection; it can be a direct connection, or an indirect connection through an intermediate connecting member, which can be the communication inside two components or the interaction relationship between two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific situations.

[0035] In the present utility model, without corresponding explanations, the orientation terms such as "upper", "lower", "left", "right", "counterclockwise", etc. indicate the orientation or position relationship based on the orientation or position relationship shown in the drawings. The contact is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or component referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be understood as a limitation to the present utility model; for the orientation terms of the present utility model, they should be understood in combination with the actual installation state.

[0036] The first aspect of the present utility model provides a battery pack. Refer to Figures 1 to 2 , as a specific embodiment of the battery pack of the present utility model, it includes a battery pack housing, a battery module, a control board 12, and a liquid cooling plate 9. The battery pack housing forms an installation cavity, and both the battery module and the control board 12 are arranged in the installation cavity. The control board 12 is integrated with a number of control modules. Among them, the control board 12 is electrically connected to the battery module for power supply management of the battery module, and the liquid cooling plate 9 is used for partitioned heat dissipation of the battery module and the control board 12.

[0037] In the prior art, the integration of the battery module and its corresponding control board is relatively low. Therefore, its heat dissipation arrangement is relatively cumbersome, and there is also a setting where the battery module and the control board share heat dissipation, so as to conduct centralized heat dissipation for the battery module and the control board. However, the heat generation of the battery module and the control board is different, so the required heat dissipation capabilities also vary. Therefore, it will cause the two to not be in a relatively suitable working environment temperature at the same time. Through the above basic technical solution, the battery pack provided by the present utility model integrates the battery module and the control board, and conducts partitioned heat dissipation control on the two through the liquid cooling plate 9, simplifies the heat dissipation arrangement of the battery module and the control board, is convenient for the arrangement of the liquid cooling plate 9, and at the same time ensures a good heat dissipation effect.

[0038] There are differences in the heat dissipation conditions of the battery module and the control board. For example, when the ambient temperature of the control board 12 is too high while the ambient temperature of the battery module is appropriate, at this time, only the control board 12 needs to be cooled. For this, as a specific implementation manner of the present utility model, the liquid cooling plate 9 includes a first flow channel area and a second flow channel area arranged in parallel. The first flow channel area is arranged corresponding to the battery module for cooling the battery module, and the second flow channel area is arranged corresponding to the control board 12 for cooling the control board 12, thereby forming two circulation circuits of the refrigerant to enable partitioned thermal management of the battery module and the control board 12.

[0039] Furthermore, in addition to cooling the battery module and the control board 12, when the ambient temperature is too low, the battery module and the control board 12 also need to be heated. For this, as a specific implementation manner of the present utility model, heating sheets are respectively arranged in the first flow channel area and / or the second flow channel area, so as to be able to perform partitioned heating on the battery module and the control board module. And in order to avoid heat conduction between the first flow channel area and the second flow channel area, affecting the effect of partitioned thermal management, a heat insulation sheet is also arranged between the first flow channel area and the second flow channel area.

[0040] As a specific implementation manner of the present utility model, see Figure 1 and Figure 2 , the liquid cooling plate 9 is constructed as a part of the battery pack housing. Preferably, the battery module and the control board 12 can be arranged in parallel on the liquid cooling plate 9. The battery pack housing further includes a battery pack frame 10 and a cover plate 3. The liquid cooling plate 9 and the cover plate 3 are respectively arranged on both sides of the battery pack frame 10 to enclose an installation cavity. The connector is arranged outside the battery pack frame 10 to use the battery pack frame 10 as a carrier for the external interface. The liquid cooling plate 9 effectively controls the internal temperature of the battery pack housing, ensures that the working environment temperature of the battery module and the control board is appropriate, improves the working efficiency of the battery module and the control board, and extends their service life.

[0041] It should be noted that the above-mentioned liquid cooling plate 9 is installed at the bottom of the battery pack frame 10 and has strong structural strength. Therefore, the liquid cooling plate 9 can be directly used as the lowest part of the chassis. See Figures 1 to 3 , a vehicle frame joint 2 can be arranged on the battery pack housing. Specifically, the vehicle frame joint 2 can be arranged on the battery pack frame 10 and is respectively connected to the front sub-frame 4 and the rear sub-frame 5 through the vehicle frame joint 2 to cooperate to form a chassis vehicle frame. Since the battery pack 1 provided by the present utility model directly replaces the vehicle frame, the center of gravity of the wire-controlled chassis equipped with the battery pack 1 is lower and has a better load-bearing space.

[0042] The above-mentioned liquid cooling plate 9 and cover plate 3 are arranged on both sides of the battery pack frame 10 and need to be sealed and installed. There will be heat generation problems with the battery module and the control board. The air in the installation cavity will expand due to heat, resulting in a relatively high air pressure in the installation cavity. Or, during the heat dissipation process of the liquid cooling plate 9, the air in the installation cavity will contract due to cold, resulting in a relatively low air pressure in the installation cavity, posing a safety hazard. As a specific implementation manner of the present invention, refer to Figure 2 , a balance valve 6 is arranged on the outer side of the battery pack frame 10. The balance valve 6 is used to connect the installation cavity with the outside, so as to balance the air pressure in the installation cavity of the battery pack housing and ensure that the air pressure in the installation cavity is the same as the atmospheric pressure.

[0043] As a specific implementation manner of the present invention, an EVA foam is arranged on one side of the cover plate 3 located in the installation cavity. When applied to a whole vehicle, the cover plate 3 is located above. This EVA foam can effectively prevent condensed water from condensing on the inner side of the cover plate 3 located at the top, thereby avoiding the occurrence of a short circuit.

[0044] It should be noted that in the prior art, the wire-controlled chassis provides low voltage for the chassis by setting a lead-acid battery. Then, the power battery pack and the lead-acid battery greatly increase the overall mass of the chassis and occupy a relatively large chassis space, which is not convenient for arranging the remaining components of the chassis. Therefore, in a preferred implementation manner of the present invention, refer to Figures 1 to 2 , the battery module includes a high-voltage battery module 14 and a low-voltage battery module 13, so as to integrate both the high-voltage and low-voltage battery modules into the installation cavity of the battery pack housing, improving the integration degree.

[0045] As a preferred implementation manner of the present invention, the battery pack of the present invention further includes a connector. The connector is arranged outside the battery pack housing and includes a high-voltage connector 7 and a low-voltage connector 8. The high-voltage connector 7 is electrically connected to the high-voltage battery module 14, and the low-voltage connector 8 is electrically connected to the low-voltage battery module 13. Among them, the control board 12 is electrically connected to the high-voltage connector 7 and the low-voltage connector 8 respectively to control the high-voltage battery module 14 to supply power to the high-voltage connector 7 and control the low-voltage battery module 13 to supply power to the low-voltage connector 8.

[0046] Since the battery pack of the present utility model integrates high-voltage and low-voltage batteries and has a high degree of integration, there is no need to additionally set up a lead-acid battery, which can effectively reduce the overall mass of the chassis and save the space occupied by the chassis. Moreover, the control board 12 integrated with several control modules is also arranged inside the battery pack housing, that is, the domain control module is also integrated into the battery pack 1, and can jointly connect to each control system (thermal management system, motor control system, braking system, headlight system, wheel speed system, etc.) of the wire-controlled chassis through a connector, so as to achieve the unification of external interfaces, reduce the number of connectors between components, facilitate the chassis space layout, reduce the production and assembly processes of the chassis, and further improve the integration degree of the battery pack; in addition, the high-voltage connector 7 and the low-voltage connector 8 can not only achieve high-voltage / low-voltage power supply, but also communicate with each control system.

[0047] As a preferred embodiment of the present utility model, the high-voltage battery module 14 and the low-voltage battery module 13 are each assembled by a plurality of single cells. Preferably, the single cells of the high-voltage battery module 14 and / or the low-voltage battery module 13 are square batteries, which include a battery body configured as a cuboid. The battery body has a length L, a width H, and a thickness D. The length L of the battery body is greater than the width H, the width H of the battery body is greater than the thickness D, and the thickness D of the battery body and the volume V of the battery body satisfy: D / V = 0.0000065 - 0.00002 mm-2. The length L of the battery body and the width H of the battery body satisfy: L / H = 4 - 21. The length L of the battery body and the surface area S of the battery body satisfy: L / S = 0.002 mm-1 - 0.005 mm-1; further, the length L of the battery body and the energy E of the battery body satisfy: L / E = 0.8 mm·Wh-1 - 2.45 mm·Wh-1. Due to the high energy density, low cost, good structural strength, and excellent thermal management of the above single cells, specifically, the low-voltage battery module 13 is a 12V battery. Integrating it with the high-voltage battery module 14, the high-voltage battery module 14 can charge the low-voltage battery module 13 through the control board in the battery pack, thus eliminating the charging controller and related wiring harness for the lead-acid battery in the prior art, simplifying the electrical architecture of the chassis, and effectively reducing the cost.

[0048] As a specific implementation of the control board 12, the control board 12 is a PCBA (Printed Circuit Board Assembly) board that at least integrates BMS (BATTERY MANAGEMENT SYSTEM) module, VCU (Vehicle Control Unit) module, PDU (Power Distribution Unit) module, DCDC (DC-to-DC converter) module, and OBC (On-Board Charger) module, thereby realizing the integration of chips corresponding to the domain control modules (such as VCU chips, PDU chips, BMS chips, etc.), greatly reducing the connectors between components, and combined with the partitioned thermal management of the liquid cooling plate 9 mentioned above, facilitating centralized heat dissipation and reducing the material cost brought by the heat dissipation requirement. In addition, through the combination of the control board 12, the high-voltage connector 7, and the low-voltage connector 8, the external interfaces are unified, the high-voltage sampling devices are shared, and the charging and power distribution are deeply integrated, saving a large number of high-voltage wiring harnesses and connectors for the chassis; and MOS transistors and related circuit designs can be integrated on the PCBA board to replace components such as relays and fuses in the existing battery pack, reducing the component cost.

[0049] It should be noted that, referring to Figure 2 , connectors are provided at both the front and rear ends of the battery pack housing corresponding to the front and rear of the vehicle head and tail, so that high-voltage connectors 7 and low-voltage connectors 8 are provided at both the front and rear ends of the battery pack housing. The high-voltage connector 7 and the low-voltage connector 8 near one end of the control board 12 can be directly connected to the control board 12, while the high-voltage connector 7 and the low-voltage connector 8 at the other end can be connected to the control board 12 through the wiring harness 11 inside the battery pack housing. Thus, each control system in the front compartment and the rear compartment of the chassis can select the high-voltage connector 7 or the low-voltage connector 8 nearby, reducing the number of chassis line arrangements, integrating the wiring harness 11 inside the battery pack housing, and further improving the integration degree.

[0050] To better understand the technical solution of the present invention, the following is described in combination with relatively preferred technical features.

[0051] Referring to Figures 1 to 3, the battery pack of the present utility model is composed of a battery pack housing, a battery module, a control board 12 and a connector. Among them, the battery pack housing includes a liquid cooling plate 9, a battery pack frame 10 and a cover plate 3. The liquid cooling plate 9 and the cover plate 3 are respectively arranged on both sides of the battery pack frame 10 to enclose an installation cavity. The battery module and the control board 12 are both arranged in this installation cavity, and the battery module includes a high-voltage battery module 14 and a low-voltage battery module 13, so that the battery pack 1 can realize high-voltage power supply and low-voltage power supply. And the control board 12 integrates the domain control module. The connectors arranged outside the battery pack frame 10 include a high-voltage connector 7 and a low-voltage connector 8. The control board 12 is electrically connected to the battery module and the connector respectively, so as to unify the external interface, and perform high- and low-voltage power supply and communication externally through the high-voltage connector 7 and the low-voltage connector 8. By making the battery pack 1 also integrate the domain control module, the integration degree is further improved; and corresponding to the battery module and the control board 12, the liquid cooling plate 9 performs partitioned thermal management, which includes a first flow channel area and a second flow channel area. The first flow channel area is arranged corresponding to the battery module for cooling the battery module, and the second flow channel area is arranged corresponding to the control board 12 for cooling the control board 12. Among them, heating sheets are also arranged in the first flow channel area and the second flow channel area, which have a heating function, and a heat insulation sheet is arranged between the first flow channel area and the second flow channel area to avoid heat conduction between the two and affect the thermal management effect. And a balance valve 6 is also arranged on the outside of the battery pack frame 10. The balance valve 6 is used to connect the installation cavity with the outside to balance the air pressure in the installation cavity with the external atmospheric pressure. In addition, the liquid cooling plate 9 has a high structural strength and can be directly used as the bottom of the chassis. A vehicle frame joint 2 is arranged on the battery pack frame 10. The front sub-frame 4 and the rear sub-frame 5 are connected through the vehicle frame joint 2 to form a chassis vehicle frame in cooperation. And because the battery pack 1 integrates high- and low-voltage battery modules and a domain control module, it has a high integration degree, effectively reduces the overall mass of the chassis, reduces the number of wire harness arrangements, and also saves the space occupied by the chassis. There is no need to separately arrange space for the low-voltage lead-acid battery and the chassis control module on the chassis vehicle frame. The entire upper part of the battery pack 1 can be used as a load-bearing space, which can effectively reduce the center of gravity of the chassis, suppress roll during turning, and make the chassis have excellent sports performance.

[0052] The second aspect of the present utility model provides a steer-by-wire chassis, including the above-mentioned battery pack, and has all its beneficial effects, which will not be elaborated here.

[0053] In a specific embodiment of the steer-by-wire chassis of the present utility model, refer to Figure 3 , the battery pack housing is provided with a vehicle frame joint 2, and the vehicle frame joint 2 is used to connect the front sub-frame 4 and the rear sub-frame 5 to form a chassis vehicle frame in cooperation.

[0054] In the third aspect of the present utility model, a vehicle is provided, which includes the above-mentioned battery pack or the above-mentioned steer-by-wire chassis, and has all its beneficial effects, which will not be elaborated here.

[0055] The preferred embodiments of the present utility model have been described in detail above in conjunction with the accompanying drawings. However, the present utility model is not limited to the specific details in the above embodiments. Within the scope of the technical concept of the present utility model, various simple modifications can be made to the technical solutions of the present utility model, and these simple modifications all belong to the protection scope of the present utility model.

[0056] In addition, it should be noted that, among the various specific technical features described in the above specific embodiments, they can be combined in any suitable manner without conflict. To avoid unnecessary repetition, the present utility model will not separately describe various possible combination methods.

[0057] Furthermore, any combination can be made among various different embodiments of the present utility model, as long as it does not violate the idea of the present utility model, and it should also be regarded as the content disclosed by the present utility model.

Claims

1. A battery pack, characterized in that, Comprising: A battery pack housing, which forms an installation cavity; A battery module, which is disposed in the installation cavity; A control board (12), which is disposed in the installation cavity and is electrically connected to the battery module; A liquid cooling plate (9), which is used for dissipating heat from the battery module and the control board (12) in zones.

2. The battery pack according to claim 1, wherein The liquid cooling plate (9) includes a first flow channel area and a second flow channel area. The first flow channel area is arranged corresponding to the battery module for dissipating heat from the battery module, and the second flow channel area is arranged corresponding to the control board (12) for dissipating heat from the control board (12).

3. The battery pack according to claim 2, characterized in that, A heating sheet is provided in the first flow channel area.

4. The battery pack according to claim 2, characterized in that, A heat insulation sheet is provided between the first flow channel area and the second flow channel area.

5. The battery pack according to claim 1, characterized in that, The liquid cooling plate (9) is configured as a part of the battery pack housing. The battery pack housing further includes a battery pack frame (10) and a cover plate (3). The liquid cooling plate (9) and the cover plate (3) are respectively disposed on both sides of the battery pack frame (10) to enclose the installation cavity.

6. The battery pack according to claim 5, wherein A balance valve (6) is provided on the outer side of the battery pack frame (10), and the balance valve (6) is used for communicating the installation cavity with the outside.

7. The battery pack according to claim 5, characterized in that, An EVA foam is provided on one side of the cover plate (3) located in the installation cavity.

8. The battery pack according to claim 1, characterized in that The battery module includes a high-voltage battery module (14) and a low-voltage battery module (13).

9. The battery pack according to claim 8, characterized in that, It further includes a connector, and the connector includes a high-voltage connector (7) and a low-voltage connector (8). The high-voltage connector (7) is electrically connected to the high-voltage battery module (14), the low-voltage connector (8) is electrically connected to the low-voltage battery module (13), and the control board (12) is electrically connected to the high-voltage connector (7) and the low-voltage connector (8) respectively.

10. The battery pack according to claim 8, characterized in that, The single cell of the high-voltage battery module (14) is a prismatic cell, and the single cell includes a cell body, and the thickness D and the volume V of the cell body satisfy: D / V = 0.0000065 to 0.00002 mm -2 .

11. The battery pack according to claim 8, characterized in that, The single cell of the low-voltage battery module (13) is a square battery, and the single cell includes a battery body. The thickness D and the volume V of the battery body satisfy: D / V = 0.0000065 to 0.00002 mm -2 .

12. A steer-by-wire chassis, characterized in that, Including the battery pack according to any one of claims 1-11.

13. The steer-by-wire chassis according to claim 12, characterized in that, The battery pack housing is provided with a vehicle frame joint (2), and the vehicle frame joint (2) is used for connecting a front sub-frame (4) and a rear sub-frame (5) to cooperate to form a chassis frame.

14. A vehicle, characterized in that, Including the battery pack according to any one of claims 1-11 or the drive-by-wire chassis according to claim 12 or 13.

Images