Battery box and battery system

Abstract

The application relates to the technical field of energy storage, in particular to a battery box and a battery system. The battery box comprises an upper frame assembly, a battery assembly and a lower frame assembly. The upper frame assembly is arranged as a hollow frame. The lower frame assembly comprises a lower frame unit, an electric connection unit and a temperature control unit. The lower frame unit is arranged as a hollow frame. The electric connection unit and the temperature control unit are arranged in the lower frame unit. One end of the battery assembly is connected with the upper frame assembly, and the other end is connected with the lower frame unit. The electric connection unit is electrically connected with the battery assembly through a cable. The temperature control unit is communicated with the battery assembly through a temperature control pipeline. A guide cavity is arranged in the lower frame unit. Part of the side surface of the guide cavity is composed of the surface of the frame part of the lower frame unit. The guide cavity extends from the side of the lower frame unit away from the battery assembly to the direction close to the battery assembly. At least part of the temperature control pipeline passes through the gap between the guide cavity and the battery assembly. Thus, the problem of unreasonable internal structure arrangement of the battery box is solved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of energy storage, in particular to a battery box and a battery system. BACKGROUND

[0002] A new energy vehicle is driven by a battery box, and the battery box can be assembled with the vehicle through a bottom support on the vehicle. In the process of installing the battery box to the bottom support, a guide mechanism is often arranged on the bottom support to position the battery box during installation. The part near the bottom end in the space surrounded by the battery box needs to arrange many functional components, such as temperature control devices and electric control devices. Usually, the temperature control pipeline of the temperature control device is arranged below the cable of the electric control device, so as to prevent the liquid leaked from the temperature control pipeline and the condensate water on the outer circumferential surface of the temperature control pipeline from dropping to the cable to avoid damage to the insulation layer of the cable and cause short circuit.

[0003] In order to avoid the components such as the guide column and the electric control device, the temperature control pipeline has multiple bending parts, the resistance of the temperature control medium flowing in the temperature control pipeline is increased, and if the temperature control capacity required by the battery box is to be met, the power of the temperature control pump driving the temperature control medium to flow needs to be increased, and the process of bending the temperature control pipeline is relatively complex, and the manufacturing cost of the battery box is too high. SUMMARY

[0004] To solve the problem of unreasonable internal structure arrangement of the battery box, the present application provides a battery box and a battery system.

[0005] In a first aspect, the present application provides a battery box, which comprises:

[0006] an upper frame assembly arranged as a hollow frame;

[0007] a battery assembly;

[0008] a lower frame assembly comprising a lower frame unit, an electric connection unit and a temperature control unit; the lower frame unit is arranged as a hollow frame; the electric connection unit and the temperature control unit are arranged in the lower frame unit;

[0009] one end of the battery assembly is connected with the upper frame assembly, and the other end is connected with the lower frame unit; the electric connection unit is electrically connected with the battery assembly through a cable; the temperature control unit is communicated with the battery assembly through a temperature control pipeline; a guide cavity is arranged in the lower frame unit; part of the side surface of the guide cavity is composed of part of the surface of the frame of the lower frame unit; the guide cavity extends from the side of the lower frame unit away from the battery assembly to the direction close to the battery assembly; at least part of the temperature control pipeline passes through the gap between the guide cavity and the battery assembly.

[0010] In some embodiments, the temperature control unit comprises a first temperature controller and a second temperature controller; the first temperature controller, the electrical connection unit, and the second temperature controller are sequentially and spacedly arranged along the length direction of the lower frame unit; the first temperature controller and the second temperature controller are respectively communicated with the battery assembly through temperature control pipelines.

[0011] In some embodiments, the electrical connection unit comprises an electrical connection part and a controller; the electrical connection part is movably connected with the lower frame unit; the controller is connected with the lower frame unit; the electrical connection part is electrically connected with the controller; the controller is electrically connected with the battery assembly through the cable.

[0012] In some embodiments, the lower frame unit comprises a first lower frame, a second lower frame, and a lower column; the first lower frame and the second lower frame are spacedly arranged and connected into a hollow frame through the lower column; the first lower frame is connected with the battery assembly; and the part of the side surface of the guide cavity is composed of part of the surface of the second lower frame.

[0013] In some embodiments, the upper frame assembly comprises an upper frame unit; the upper frame unit comprises a first upper frame, a second upper frame, and an upper column; the first upper frame and the second upper frame are spacedly arranged and connected into a hollow frame through the upper column; and the second upper frame is connected with the battery assembly.

[0014] In some embodiments, at least part of the cable is wound around the circumferential side of the guide cavity.

[0015] In some embodiments, a plurality of the battery assemblies are sequentially arranged along the length direction of the upper frame assembly.

[0016] In some embodiments, the guide cavity is arranged on the side close to the outer circumferential surface of the lower frame unit in the space surrounded by the lower frame unit.

[0017] In some embodiments, the battery assembly comprises a battery frame, a battery pack, and a temperature control plate; the battery frame is arranged in a hollow shape; the battery pack and the temperature control plate are arranged in the hollow cavity of the battery frame; the battery pack and the temperature control plate are in abutment; one end of the battery frame is connected with the upper frame assembly, and the other end is connected with the lower frame unit; the electrical connection unit is electrically connected with the battery pack through the cable; and the temperature control unit is communicated with the temperature control plate through the temperature control pipeline.

[0018] In the second aspect, the present application provides a battery system applied to the battery box in any of the first aspect; the battery system comprises:

[0019] The battery system further comprises a bottom support; the bottom support comprises a support frame, a guide column and an electrical connector; one end of the guide column is connected with the support frame, and the other end extends away from the support frame; the electrical connector is connected with the support frame;

[0020] The battery system comprises a working state; in the working state, part of the guide column extends into the guide cavity of the battery box, the temperature control pipeline is arranged in the space between the guide column and the battery assembly, the cable is wrapped around the side of the guide column, the support frame abuts against the side of the lower frame unit away from the battery assembly, and the electrical connector is electrically connected with the electrical connection unit.

[0021] To solve the problem of unreasonable internal structure arrangement of the battery box, the battery system has the following advantages:

[0022] The guide cavity in the lower frame unit can be matched when the battery box and the bottom support are assembled, so that the battery box can be smoothly assembled with the bottom support even if there is a certain error in the relative position of the battery box and the bottom support. At least part of the temperature control pipeline can pass through the gap between the side of the guide cavity close to the battery assembly and the battery assembly, so that the temperature control pipeline can not avoid the guide cavity, the bending part of the temperature control pipeline is reduced as much as possible, and the flow resistance of the temperature control medium in the temperature control pipeline is reduced, and the power requirement for driving the temperature control medium is reduced. BRIEF DESCRIPTION OF DRAWINGS

[0023] Figure 1 A battery box schematic diagram of an embodiment is shown;

[0024] Figure 2 A battery box schematic diagram of another embodiment is shown;

[0025] Figure 3 A battery system schematic diagram of an embodiment is shown;

[0026] Figure 4 A lower frame assembly schematic diagram of a battery box of an embodiment is shown;

[0027] Figure 5 A lower frame assembly schematic diagram of a battery box of another embodiment is shown.

[0028] Reference signs: 01, upper frame assembly; 11, first upper frame; 12, second upper frame; 13, upper stand column; 02, battery assembly; 21, battery frame; 03, lower frame assembly; 31, lower frame unit; 311, first lower frame; 312, second lower frame; 313, lower stand column; 32, electrical connection unit; 321, controller; 322, electrical connection part; 33, temperature control unit; 331, first temperature controller; 332, second temperature controller; 34, temperature control pipeline; 35, cable; 04, bottom support; 41, support frame; 42, guide column; 43, electrical connector. DETAILED DESCRIPTION

[0029] The present disclosure will now be discussed with reference to a number of exemplary embodiments. It is to be appreciated that these embodiments are discussed only for illustration and that the present disclosure is thus not limited to these embodiments.

[0030] As used herein, the term "includes" and its variants are to be read to be analogous to "comprising," and the term "based on" is to be read as "based at least in part on." The terms "one embodiment" and "an embodiment" are to be read as "at least one embodiment." The term "another embodiment" is to be read as "at least one other embodiment." The terms "upper," "lower," "left," "right," "front," "rear," "top," "bottom," "inner," "outer," "vertical," "horizontal," "lateral," "longitudinal," and the like, shall mean the orientation or positional relationship as shown in the drawings. These terms are primarily used to better describe the application and its embodiments, and are not used to limit the indicated device, element or component to a particular orientation or configuration, or to a particular manner of construction or operation. Also, some of the terms above, in addition to indicating orientation or positional relationships, can also be used to indicate other meanings, for example, the term "upper" can also be used to indicate a certain dependency or connection relationship in some cases. For those skilled in the art, the specific meanings of these terms in the present application can be understood according to the specific circumstances. In addition, the terms "mount," "provide," "provided with," "connect," "connected" should be interpreted broadly. For example, it can be fixed connection, detachable connection, or integral structure; it can be mechanical connection, or electrical connection; it can be direct connection, or indirect connection through an intermediate medium, or internal communication between two devices, elements or components. For those skilled in the art, the specific meanings of the above terms in the present application can be understood according to the specific circumstances. In addition, the terms "first," "second," and the like are primarily used to distinguish different devices, elements or components (the specific types and structures can be the same or different), and are not intended to indicate or imply the relative importance and quantity of the indicated devices, elements or components. Unless otherwise stated, the meaning of "multiple" is two or more.

[0031] In the present embodiment, as Figure 1 , Figure 2As shown, the battery box can be connected with the vehicle through the bottom support 04, and in order to facilitate the assembly of the battery box with the bottom support 04, the guiding column 42 can be arranged on the bottom support 04. The cable 35 inside the battery box is usually arranged above the temperature control pipeline 34, and thus the temperature control pipeline 34 needs to be designed as a curved pipeline to avoid the guiding column 42, which will cause the flow resistance of the temperature control medium in the temperature control pipeline 34 to be large. Therefore, a battery box is provided. The battery box can include an upper frame assembly 01, a battery assembly 02, and a lower frame assembly 03. The upper frame assembly 01 can be arranged as a hollow frame.

[0032] The lower frame assembly 03 can include a lower frame unit 31, an electrical connection unit 32, and a temperature control unit 33. The lower frame unit 31 can be arranged as a hollow frame. The electrical connection unit 32 and the temperature control unit 33 are arranged in the lower frame unit 31.

[0033] One end of the battery assembly 02 can be connected with the upper frame assembly 01, and when foreign matter moves towards the battery assembly 02, the upper frame assembly 01 can block the foreign matter from directly contacting the battery assembly 02. The other end of the battery assembly 02 can be connected with the lower frame unit 31, so that the lower frame unit 31 supports the battery assembly 02. The electrical connection unit 32 can be electrically connected with the battery assembly 02 through the cable 35, and after the battery box is installed and assembled with the bottom support 04 of the vehicle, the electrical connection unit 32 can be electrically connected with the electrical interface of the vehicle, so that the electrical energy of the battery assembly 02 is sequentially transmitted to the vehicle through the cable 35 and the electrical connection unit 32, thereby providing the vehicle with driving energy. The temperature control unit 33 can be communicated with the battery assembly 02 through the temperature control pipeline 34, and the temperature control medium in the temperature control pipeline 34 exchanges heat with the battery assembly 02 and flows to the temperature control unit 33 through the temperature control pipeline 34. When the temperature of the battery assembly 02 is too high, the temperature control unit 33 cools the temperature control medium, and when the temperature of the battery assembly 02 is too low, the temperature control unit 33 heats the temperature control medium, thereby completing the temperature control cycle of the battery box. A guiding cavity can be arranged in the lower frame unit 31. Part of the side surface of the guiding cavity can be composed of the surface of the frame part of the lower frame unit 31. The guiding cavity can extend from the side of the lower frame unit 31 away from the battery assembly 02 towards the direction close to the battery assembly 02. During the installation of the battery box to the bottom support 04, even if there is a certain error in the relative position of the battery box and the bottom support 04 in the horizontal direction, the guiding column 42 on the bottom support 04 can be inserted into the guiding cavity, so that the battery box and the bottom support 04 can be quickly installed. Figure 4 、 Figure 5 As shown, at least part of the temperature control pipeline 34 can pass through the gap between the guiding cavity and the end of the battery assembly 02 close to the battery unit, thereby reducing the bending part of the temperature control pipeline 34 designed to avoid the guiding cavity, reducing the flow resistance of the temperature control medium in the temperature control pipeline 34, and reducing the power demand of the temperature control unit 33 to drive the flow of the temperature control medium.

[0034] In the present embodiment, as shown in Figure 1As shown, the temperature control unit 33 can include a first temperature controller 331 and a second temperature controller 332. The first temperature controller 331, the electrical connection unit 32, and the second temperature controller 332 can be sequentially and spacedly arranged along the length direction of the lower frame unit 31, so as to evenly distribute the weight of the lower frame unit 31 along the length direction, and improve the handling performance of the vehicle after the battery box is assembled with the vehicle. The first temperature controller 331 and the second temperature controller 332 can be in communication with the battery assembly 02 through the temperature control pipeline 34. When the temperature of the battery assembly 02 is too high, the first temperature controller 331 and the second temperature controller 332 can reduce the temperature of the battery assembly 02. When the temperature of the battery assembly 02 is too low, the first temperature controller 331 and the second temperature controller 332 can increase the temperature of the battery assembly 02. According to the temperature of the battery assembly 02, the first temperature controller 331 and the second temperature controller 332 can be controlled to be started alone or simultaneously, so as to reduce the energy consumption under the premise of ensuring the temperature control capability. When the first temperature controller 331 is damaged, the second temperature controller 332 can at least keep the battery assembly 02 working at a suitable temperature for a short time, so as to avoid the vehicle stalling and improve the safety. When the second temperature controller 332 is damaged, the first temperature controller 331 can at least keep the battery assembly 02 working at a suitable temperature for a short time, so as to avoid the vehicle stalling and improve the safety.

[0035] In the embodiment, as shown in Figure 5 The electrical connection unit 32 can include an electrical connection part 322 and a controller 321. The electrical connection part 322 can be movably connected with the lower frame unit 31, so that the electrical connection part 322 and the lower frame unit 31 can move relatively within a certain range. When the battery box is assembled with the vehicle bottom support 04, if there is a certain error in the relative position of the electrical interface and the electrical connection part 322, the guide device on the electrical interface can guide the electrical connection part 322 to be electrically connected with the electrical interface, so as to reduce the requirement for positioning accuracy and achieve the effect of reducing cost. The controller 321 can be connected with the lower frame unit 31, so as to fix the relative position of the controller 321 and the lower frame unit 31, and enable the lower frame unit 31 to stably support the controller 321. The electrical connection part 322 can be electrically connected with the controller 321. The controller 321 can be electrically connected with the battery assembly 02 through the cable 35. After the battery box is assembled with the vehicle, the electrical connection part 322 can be electrically connected with the electrical interface of the vehicle bottom support 04, and the controller 321 can control the current and voltage output from the battery assembly 02 to the vehicle according to the current demand, so as to optimize the reliability of the vehicle.

[0036] In the embodiment, as shown in Figure 1 , Figure 5As shown, the lower frame unit 31 can include a first lower frame 311, a second lower frame 312, and a lower column 313. The first lower frame 311 and the second lower frame 312 can be arranged in the height direction of the battery assembly 02 and connected by the lower column 313. The first lower frame 311 can be connected to the battery assembly 02 to support the battery assembly 02. The side surface of the guiding cavity can be composed of part of the surface of the second lower frame 312.

[0037] In this embodiment, as shown in Figure 1 The upper frame assembly 01 can include an upper frame unit. The upper frame unit can include a first upper frame 11, a second upper frame 12, and an upper column 13. The first upper frame 11 and the second upper frame 12 can be arranged in the height direction of the battery assembly 02 and connected by the upper column 13. The second upper frame 12 can be connected to the battery assembly 02. When a foreign object impacts the battery assembly 02, the upper frame unit can prevent the foreign object from directly contacting the battery assembly 02. The space surrounded by the hollow frame can form an energy absorption area to absorb the impact force of the foreign object, improving the safety of the battery box.

[0038] In this embodiment, as shown in Figure 4 , Figure 5 The cable 35 is made of flexible material, and at least part of the cable 35 can be wrapped around the outer periphery of the guiding cavity. The space surrounded by the lower frame assembly 03 can be fully utilized to make the battery box more compact.

[0039] In this embodiment, as shown in Figure 1 , Figure 2 During driving, the upper part of the battery box will shake more, and multiple battery assemblies 02 can be arranged in the length direction of the upper frame assembly 01 to avoid the connection position of the battery assembly 02 close to the upper frame assembly 01, thereby making the battery assembly 02 more stable and providing a longer range for the battery box.

[0040] In this embodiment, as shown in Figure 4 , Figure 5 The guiding cavity can be arranged on one side of the lower frame unit 31 close to the outer periphery of the lower frame unit 31 in the space surrounded by the lower frame unit 31, making the space surrounded by the lower frame unit 31 more regular, and making it more convenient to arrange other components in the space surrounded by the lower frame unit 31.

[0041] In some other embodiments, a plurality of guide cavities can be arranged in the lower frame unit 31, and the plurality of guide cavities are arranged in the space surrounded by the lower frame unit 31 and close to one side of the outer circumferential surface of the lower frame unit 31. When the battery box is assembled with the bottom support 04, the guide cavities are arranged corresponding to the guide columns 42 of the bottom support 04 and cooperated with each other to more quickly reduce the error of the relative position between the battery box and the bottom support 04.

[0042] In the embodiment, as shown in Figure 1 The battery assembly 02 can include a battery frame 21, a battery pack, and a temperature control plate. The battery frame 21 can be arranged in a hollow shape. The battery pack and the temperature control plate can be arranged in the hollow chamber of the battery frame 21, respectively. One end of the battery frame 21 can be connected with the upper frame assembly 01, and the other end can be connected with the lower frame unit 31, so that the battery pack storing electric energy can bear a small pressure. The electric connection unit 32 can be electrically connected with the battery pack through the cable 35, and the electric energy of the battery pack can be transmitted to the vehicle to realize the driving of the vehicle. The temperature control unit 33 can be communicated with the temperature control plate through the temperature control pipeline 34. The battery pack can be arranged in abutment with the temperature control plate. The temperature control plate can exchange heat with the battery pack. The temperature control unit 33 can drive the temperature control medium in the temperature control pipeline 34 to move to contact the temperature control plate, so that the temperature control medium exchanges heat with the temperature control plate, and then flows to the temperature control unit 33. When the temperature of the battery pack is too high, the temperature control unit 33 can reduce the temperature of the temperature control medium. When the temperature of the battery pack is too low, the temperature control unit 33 can increase the temperature of the temperature control medium.

[0043] In the embodiment, a battery system is provided, which includes the battery box of any of the above embodiments. As shown in Figure 3 As shown in Figure 3 The battery system can further include a bottom support 04. The bottom support 04 can include a support frame 41, a guide column 42, and an electric connector 43. The support frame 41 can be connected to the vehicle. The electric connector 43 can be electrically connected with the vehicle. One end of the guide column 42 can be connected with the support frame 41, and the other end can extend away from the support frame 41. The radial cross-sectional area of the guide column 42 can gradually decrease along the extension direction of the guide column 42, so that the guide column 42 forms a taper. When the battery box is assembled with the bottom support 04, the outer circumferential surface of the guide column 42 abuts and slides with the inner circumferential wall of the guide cavity, so as to reduce the position error of the battery box and the bottom support 04 in the horizontal direction. The electric connector 43 can be connected with the support frame 41.

[0044] The battery system comprises a working state. The working state can comprise that the partial guide column 42 extends to the guide cavity of the battery box, the temperature control pipeline 34 can be arranged in the space between the end of the guide column 42 away from the support frame 41 and the battery assembly 02, the cable 35 can be wound around the side of the guide column 42, the support frame 41 can be in abutment with the side of the lower frame unit 31 away from the battery assembly 02, so that the support frame 41 supports the weight of the battery box, and the electrical interface can be electrically connected with the electrical connection unit 32, so that the electrical energy of the battery assembly 02 provides driving energy for the vehicle.

[0045] Those skilled in the art can understand that the above-mentioned embodiments are specific cases for realizing the present disclosure, and in actual application, various changes can be made in form and details without departing from the scope of the present disclosure.

Claims

1. A battery box characterized by, The battery box comprises: an upper frame assembly arranged as a hollow frame; a battery assembly; a lower frame assembly comprising a lower frame unit, an electrical connection unit and a temperature control unit; the lower frame unit is arranged as a hollow frame; the electrical connection unit and the temperature control unit are arranged in the lower frame unit; one end of the battery assembly is connected with the upper frame assembly, and the other end is connected with the lower frame unit; the electrical connection unit is electrically connected with the battery assembly through a cable; the temperature control unit is communicated with the battery assembly through a temperature control pipeline; a guide cavity is arranged in the lower frame unit; part of the side surface of the guide cavity is composed of the frame surface of the lower frame unit; the guide cavity extends from the side of the lower frame unit away from the battery assembly to the side close to the battery assembly; at least part of the temperature control pipeline passes through the gap between the guide cavity and the battery assembly; the guide cavity is arranged on the side close to the outer circumferential surface of the lower frame unit in the space surrounded by the lower frame unit.

2. The battery box according to claim 1, wherein the temperature control unit comprises a first temperature controller and a second temperature controller; the first temperature controller, the electrical connection unit and the second temperature controller are sequentially and spacedly arranged along the length direction of the lower frame unit; the first temperature controller and the second temperature controller are respectively communicated with the battery assembly through a temperature control pipeline.

3. The battery box according to claim 1, wherein the electrical connection unit comprises an electrical connection part and a controller; the electrical connection part is movably connected with the lower frame unit; the controller is connected with the lower frame unit; the electrical connection part is electrically connected with the controller; the controller is electrically connected with the battery assembly through the cable.

4. The battery box according to claim 1, wherein the lower frame unit comprises a first lower frame, a second lower frame and a lower stand column; the first lower frame and the second lower frame are spacedly arranged and connected into a hollow frame through the lower stand column; the first lower frame is connected with the battery assembly; part of the side surface of the guide cavity is composed of part of the surface of the second lower frame.

5. The battery box according to claim 1, wherein the upper frame assembly comprises an upper frame unit; the upper frame unit comprises a first upper frame, a second upper frame and an upper stand column; the first upper frame and the second upper frame are spacedly arranged and connected into a hollow frame through the upper stand column; the second upper frame is connected with the battery assembly.

6. The battery box according to claim 1, wherein at least part of the cable is wound around the circumferential side of the guide cavity.

7. The battery box according to claim 1, wherein a plurality of battery assemblies are sequentially arranged along the length direction of the upper frame assembly.

8. The battery box according to claim 1, wherein The battery assembly comprises a battery frame, a battery pack, and a temperature control plate; the battery frame is provided in a hollow shape; the battery pack and the temperature control plate are arranged in a hollow cavity of the battery frame; the battery pack and the temperature control plate are in abutment; one end of the battery frame is connected with the upper frame assembly, and the other end is connected with the lower frame unit; the electric connection unit is electrically connected with the battery pack through a cable; the temperature control unit is communicated with the temperature control plate through a temperature control pipeline.

9. A battery system characterized by, The battery system comprises the battery box according to any one of claims 1-8; The battery system further comprises a bottom support; the bottom support comprises a support frame, a guide column, and an electric connector; one end of the guide column is connected with the support frame, and the other end extends away from the support frame; the electric connector is connected with the support frame; The battery system comprises a working state; in the working state, part of the guide column extends into a guide cavity of the battery box, the temperature control pipeline is arranged in a space between the guide column and the battery assembly, the cable is wound around the guide column, the support frame is in abutment with a side of the lower frame unit away from the battery assembly, and the electric connector is electrically connected with the electric connection unit.

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