Battery pack and battery box

Abstract

The utility model discloses a battery pack and a battery box. The battery pack comprises a shell, a runner plate, an outer extension pipe and a water nozzle, the runner plate is connected to the shell, and a cooling water channel is formed between the runner plate and the shell. And the outer extension pipe is connected to one side, deviating from the shell, of the runner plate, is communicated with the cooling water channel, and extends out of the runner plate and the shell. The water nozzle is connected to the end, extending out of the shell, of the outer extending pipe. According to the battery pack, the cooling water path of the runner plate is communicated with the water nozzle through the outer extension pipe, the water nozzle extends by a certain distance in the direction away from the shell through the outer extension pipe, and the water nozzle can be directly located outside the battery pack, so that the water inlet and the water outlet are reliably connected to the outside of the battery pack without being in butt joint in the battery pack; and safety and failure risks caused by liquid leakage are directly avoided.

Description

Technical Field

[0001] This utility model relates to the field of battery technology, and in particular to a battery pack and battery box. Background Technology

[0002] The battery pack includes a casing, battery modules, and a cooling plate. The cooling plate is connected to the casing, and the battery modules are placed inside the casing, directly or indirectly in contact with the cooling plate for cooling. Existing water-cooled plates involve placing the liquid cooling nozzles inside the battery pack and then connecting them to the inlet and outlet ports on the frame via water pipes. This connection method creates four pairs of male and female connectors inside the battery pack. The increased number of connectors significantly increases the risk of leakage. If leakage occurs, it can lead to internal insulation failures, short circuits, and other problems within the battery pack. Utility Model Content

[0003] To solve the above-mentioned technical problems, this utility model provides a battery pack and a battery box.

[0004] The primary objective of this utility model is to provide a novel battery pack, employing the following technical solution:

[0005] A new type of battery pack includes:

[0006] shell;

[0007] A flow channel plate is connected to the outer casing, and a cooling water channel is formed between the flow channel plate and the outer casing;

[0008] An external extension tube is connected to the side of the flow channel plate away from the outer casing, the external extension tube is connected to the cooling water channel, and the external extension tube extends out of the flow channel plate and the outer casing;

[0009] A water tap, which is connected to one end of the outer extension tube that extends out of the housing.

[0010] Optionally, a first water inlet communicating with the cooling water channel is provided on the flow channel plate;

[0011] The outer extension pipe has a transition cavity and a second water outlet communicating with the transition cavity, and the water nozzle is connected to the transition cavity;

[0012] With the outer extension pipe connected to the flow channel plate, the first water inlet and the second water inlet are connected.

[0013] Optionally, the battery pack includes a sealing ring disposed between the flow channel plate and the outer extension tube, and the sealing ring seals the gap between the flow channel plate and the outer extension tube.

[0014] Optionally, the battery pack includes a water outlet bushing connected to the flow channel plate and communicating with the first water outlet.

[0015] With the flow channel plate and the outer extension pipe connected, the water outlet bushing is inserted into the second water inlet, and the sealing ring is fitted around the outside of the water outlet bushing.

[0016] Optionally, an annular stepped groove is provided on the outer extension pipe along the second water inlet;

[0017] The sealing ring is located within the annular stepped groove.

[0018] Optionally, the outer extension tube has a tube body and first fins disposed on both sides of the tube body;

[0019] The first vane is fixedly connected to the flow channel plate;

[0020] The faucet is connected to the pipe body.

[0021] Optionally, the battery pack includes a fixing block, which corresponds one-to-one with the first wing and is welded to the flow channel plate;

[0022] The first winglet is attached to the fixing block;

[0023] One end of the fastener passes through the first wing and is connected to the fixing block, while the other end of the fastener is confined to the first wing.

[0024] Optionally, the flow channel plate is provided with a recessed portion;

[0025] The fixing block is embedded in the recessed portion, and the fixing block is welded to the inner wall of the recessed portion.

[0026] The second objective of this utility model is to provide a battery box, comprising:

[0027] A housing, the housing having a horizontal frame and a longitudinal frame;

[0028] As described above, the battery pack is supported on the horizontal frame, the outer extension tube of the battery pack passes through the longitudinal frame and is fixedly connected to the longitudinal frame, and the water nozzle is provided at one end of the outer extension tube extending out of the longitudinal frame.

[0029] Optionally, an avoidance opening is provided on the longitudinal frame;

[0030] The outer extension tube passes through the clearance opening, and second winglets are respectively provided on both sides of the outer extension tube. The second winglets are fixed to the longitudinal frame by fasteners.

[0031] By adopting the above technical solution, this application has the following beneficial effects:

[0032] The battery pack of this application is connected to the cooling water passage and water nozzle of the flow channel plate through an external extension pipe. The external extension pipe extends the water nozzle a certain distance away from the outer casing, so that the water nozzle is located directly outside the battery pack. This reliably transfers the inlet and outlet water outlets to the outside of the pack, eliminating the need for connection inside the battery pack and directly avoiding safety and failure risks caused by leakage.

[0033] The specific embodiments of this utility model will be described in further detail below with reference to the accompanying drawings. Attached Figure Description

[0034] The accompanying drawings, which form part of this application, are used to provide a further understanding of the present invention. The illustrative embodiments and descriptions of the present invention are used to explain the present invention, but do not constitute an undue limitation of the present invention. Obviously, the drawings described below are merely some embodiments; those skilled in the art can obtain other drawings based on these drawings without creative effort. In the drawings:

[0035] Figure 1 This illustration shows a schematic diagram of the structure of the battery pack and the longitudinal frame provided in an embodiment of this application.

[0036] Figure 2 This illustration shows a partial enlarged structural diagram of the battery pack and the longitudinal frame provided in an embodiment of this application.

[0037] Figure 3 An exploded view of the battery pack and longitudinal frame assembly provided in an embodiment of this application is shown.

[0038] Figure 4 This illustration shows a partially enlarged exploded view of the battery pack and longitudinal frame assembly provided in an embodiment of this application.

[0039] Figure 5 This illustration shows a further exploded structural diagram of the battery pack and longitudinal frame provided in an embodiment of this application.

[0040] Figure 6 This illustration shows a partially enlarged exploded view of the battery pack and longitudinal frame assembly provided in an embodiment of this application.

[0041] Figure 7 This illustration shows a partial enlarged cross-sectional view of the battery pack and longitudinal frame assembly provided in an embodiment of this application.

[0042] Figure 8 A schematic diagram of the flow channel plate that cooperates with the longitudinal frame in the embodiment of this application is shown near the outer casing.

[0043] In the figure: Cooling water channel 1, main water channel 11, inlet branch water channel 111, outlet branch water channel 112, flow channel plate 101, flat plate 102, inlet flow channel 12, outlet flow channel 13, recessed part 15, first water inlet 2, water inlet 21, water outlet 22, outer extension pipe 3, transition cavity 31, first wing 33, second wing 34, water nozzle 4, sealing ring 6, water outlet bushing 7, fixing block 8, outer shell 9, flow channel plate 100, longitudinal frame 200, clearance opening 201.

[0044] It should be noted that these accompanying drawings and textual descriptions are not intended to limit the scope of the present invention in any way, but rather to illustrate the concept of the present invention to those skilled in the art by referring to specific embodiments. Detailed Implementation

[0045] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions in the embodiments will be clearly and completely described below with reference to the accompanying drawings. The following embodiments are used to illustrate this utility model, but are not intended to limit the scope of this utility model.

[0046] In the description of this utility model, it should be noted that the terms "upper", "lower", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or component referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0047] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation" and "connection" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0048] Example 1

[0049] See Figures 1 to 8As shown, this application embodiment provides a battery pack including a housing 9, a flow channel plate 100, an outer extension pipe 3, and a water nozzle 4. The flow channel plate 100 is connected to the housing 9, forming a cooling water channel 1 between the flow channel plate 100 and the housing 9. The outer extension pipe 3 is connected to the side of the flow channel plate 100 away from the housing 9, and is connected to the cooling water channel 1, extending beyond the flow channel plate and the housing 9. The water nozzle 4 is connected to the end of the outer extension pipe 3 that extends beyond the housing 9. The battery pack of this application connects the cooling water channel of the flow channel plate 100 and the water nozzle 4 through the outer extension pipe 3. The outer extension pipe 3 extends the water nozzle 4 a certain distance away from the housing 9, allowing the water nozzle 4 to be located directly outside the battery pack. This reliably transfers the inlet and outlet water inlets to the outside of the pack, eliminating the need for internal connection within the battery pack and directly avoiding safety and failure risks caused by leakage.

[0050] In one possible implementation, the flow channel plate 100 is provided with a first water inlet 2 communicating with the cooling water channel, the outer extension pipe 3 has a transition cavity 31 and a second water inlet communicating with the transition cavity 31, and the water nozzle 4 communicates with the transition cavity 31. When the outer extension pipe 3 is connected to the flow channel plate 100, the first water inlet 2 and the second water inlet are connected. The outer extension pipe 3 is sealed to the flow channel plate 100 at the connection between the first water inlet 2 and the second water inlet. The coolant can flow sequentially through the water nozzle 4, the transition cavity 31, the second water inlet, and the first water inlet 2, or sequentially through the first water inlet 2, the second water inlet, the transition cavity 31, and the water nozzle 4.

[0051] In one possible implementation, the battery pack includes a sealing ring 6 disposed between the flow channel plate 100 and the outer extension tube 3, the sealing ring 6 sealing the gap between the flow channel plate 100 and the outer extension tube 3. The thickness of the sealing ring 6 is greater than the gap between the flow channel plate 100 and the outer extension tube 3, and the sealing ring 6 is interference-fitted into the gap to fully ensure the sealing performance after connection and prevent leakage.

[0052] In one possible implementation, the battery pack includes a water outlet bushing 7 connected to the flow channel plate 100 and communicating with the first water inlet 2. With the flow channel plate 100 and the outer extension pipe 3 connected, the water outlet bushing 7 is inserted into the second water inlet, and the sealing ring 6 is fitted over the outside of the water outlet bushing 7. The water outlet bushing 7 is sealed and welded to the outer edge of the first water inlet 2 of the flow channel plate 100, and the outer edge of the second water inlet of the outer extension pipe 3 is fitted onto the water outlet bushing 7. This provides initial positioning during installation, ensuring accurate installation of the outer extension pipe 3 and facilitating installation.

[0053] Furthermore, the sealing ring 6 is fitted on the outside of the water bushing, which can minimize the contact between the sealing ring 6 and the coolant and extend the service life of the sealing ring 6.

[0054] In one possible implementation, an annular stepped groove is provided on the outer extension pipe 3 along the second water inlet, and the sealing ring 6 is confined within the annular stepped groove. A gap is formed between the annular stepped groove and the flow channel plate 100 to accommodate the sealing ring 6. The thickness of the sealing ring 6 is greater than the height of the annular stepped groove.

[0055] In one possible implementation, the outer extension pipe 3 has a pipe body and first fins 33 disposed on both sides of the pipe body. The first fins 33 are fixedly connected to the flow channel plate 100, and the water nozzle 4 is connected to the pipe body. The pipe body and the first fins 33 on both sides are welded or integrally formed. The structure on the first fins 33 that is connected to the main body of the water-cooling plate increases the connection point, ensures stable connection, and does not affect the flow channel inside the pipe body.

[0056] In one possible implementation, the battery pack includes a fixing block 8, which corresponds one-to-one with the first wing 33, and the fixing block 8 is welded to the flow channel plate 100. The first wing 33 is attached to the fixing block 8, and one end of a fastener passes through the first wing 33 and is connected to the fixing block, while the other end of the fastener is confined within the first wing 33. The fixing block 8 provides a location for the fixing hole, ensuring that the fixing hole does not need to be set on the flow channel plate 100, thus not affecting the sealing effect.

[0057] In one possible implementation, a recess 15 is provided on the flow channel plate 100, and the fixing block 8 is embedded in the recess 15 and welded to the inner wall of the recess 15. Since the fixing block 8 is embedded in the recess 15, it will not protrude from the flow channel plate 100, ensuring that the outer extension tube 3 fits snugly during installation, thus making the structure more stable. Furthermore, the recess 15 positions and limits the fixing block 8, making assembly more convenient and ensuring stable assembly of the fixing block 8.

[0058] The cooling water channel 1 includes two first water inlets 2, namely an inlet 21 and an outlet 22. The cooling water channel 1 also includes at least two main water channels 11, at least two inlet channels 12, and at least two outlet channels 13. Each main water channel 11 is arranged sequentially along the length of the water-cooled plate body 1. One end of each inlet channel 12 is connected to the inlet 21, and the other end of each inlet channel 12 extends to and connects to the corresponding main water channel 11. One end of each outlet channel 13 is connected to the outlet 22, and the other end of each outlet channel 13 extends to and connects to the corresponding main water channel 11. The main water channels 11 include multiple bends and loops, serving as the main heat dissipation area. The inlet channels 12 can be directly connected to the inlet 21, or connected to the inlet 21 through a main water inlet channel. The water outlet channel 13 can be directly connected to the water outlet 22, and is connected to the water outlet 22 through a main water outlet channel. In the water-cooled plate assembly of this application, the water inlet channel 12 connected to the water inlet 21 is connected to different main water channels 11, so that the coolant in each main water channel 11 along the length of the water-cooled plate body 1 is the low-temperature coolant that just entered from the water inlet 21. As a result, the temperature of the coolant in each main water channel 11 along the length of the water-cooled plate body 1 is almost the same, thereby ensuring that when the water-cooled plate assembly cools the battery module, the heat exchange of the battery module is uniform along the length, which is beneficial to better control the temperature difference in the battery module, achieve better heat exchange cooling effect, and extend battery life.

[0059] In some possible implementations, the inlet 21 and outlet 22 are located at one end of the water-cooled plate body 1 along its length, and are arranged sequentially along the width of the water-cooled plate body 1, facilitating the layout and installation of external water inlet and outlet pipes. The inlet channel 12 and outlet channel 13 both extend along the length of the water-cooled plate body 1. This allows the inlet channel 12 and outlet channel 13 to connect to each main water channel 11 with the shortest possible distance, resulting in a neater water path arrangement and minimizing the temperature difference between the main water channels 11.

[0060] In some possible implementations, each inlet channel 12 and each outlet channel 13 are respectively located on both sides of the water-cooled plate body 1 along the width direction. The coolant temperature in the outlet channel 13 is higher, and increasing the distance between the inlet channel 12 and the outlet channel 13 can reduce the impact on the coolant in the inlet channel 12.

[0061] In some possible implementations, in two adjacent water inlet channels 12, the water inlet channel 12 closer to the long side of the water-cooled plate body 1 is connected to the main water channel 11 away from the water inlet 21, and the water inlet channel 12 away from the long side of the water-cooled plate body 1 is connected to the main water channel 11 closer to the water inlet 21. This arrangement prevents the water inlet channels 12 from intersecting.

[0062] Furthermore, in two adjacent water outlet channels 13, the water outlet channel 13 closer to the long side of the water-cooled plate body 1 is connected to the main water channel 11 away from the water outlet 22, and the water outlet channel 13 away from the long side of the water-cooled plate body 1 is connected to the main water channel 11 closer to the water outlet 22. This arrangement prevents the water outlet channels 13 from intersecting.

[0063] In some possible implementations, the main waterway 11 includes at least two sets of turbulence channels. Each set of turbulence channels includes multiple inlet branch channels 111 and multiple outlet branch channels 112. The inlet branch channels 111 and outlet branch channels 112 are sequentially arranged along the width direction of the water-cooled plate body 1 and extend along the length direction of the water-cooled plate body 1. The inlet branch channels 111 and outlet branch channels 112 are connected. The inlet channel 12 connects to the inlet branch channels 111, and the outlet channel 13 connects to each outlet branch channel. The inlet branch channels 111 are connected in parallel, and the outlet branch channels 112 are connected in parallel. Within the same set, one side of each inlet branch channel 111 and the same side of each outlet branch channel 112 are connected by a main waterway. By setting the inlet branch channel 111 and the outlet branch channel 112 in parallel, it can be ensured that there is almost no temperature difference in the coolant in each branch channel, thereby further reducing the temperature difference in the battery module.

[0064] Example 2

[0065] See Figures 1 to 8 As shown, this application provides a battery box, including a casing and a battery pack as described in Embodiment 1. The casing has a horizontal frame and a vertical frame 200. The battery pack is supported on the horizontal frame. An outer extension tube 3 of the battery pack passes through the vertical frame 200 and is fixedly connected to the vertical frame 200. A water nozzle 4 is provided at one end of the outer extension tube 3 extending out of the vertical frame 200. The interior of the outer extension tube 3 is fixedly connected to a guide plate, and the exterior of the outer extension tube 3 is connected to the vertical frame 200, ensuring the stable connection of the outer extension tube 3 and improving the overall integrity of the battery box. The water nozzle 4 extends outside the battery box, thereby reliably transferring the inlet and outlet water inlets to the outside of the pack, eliminating the need for internal connection within the battery pack and directly avoiding safety and failure risks caused by leakage.

[0066] In one possible implementation, a clearance opening 201 is provided on the longitudinal frame 200, and the outer extension tube 3 passes through the clearance opening 201. Second winglets 34 are respectively provided on both sides of the outer extension tube 3, and the second winglets 34 are fixed to the longitudinal frame 200 by fasteners. The tube body and the second winglets 34 on both sides are welded or integrally formed. The structure on the second winglets 34 that connects to the longitudinal frame 200 increases the connection point, ensuring a stable connection without affecting the flow channel inside the tube.

[0067] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model in any way. Although the present utility model has been disclosed above with reference to a preferred embodiment, it is not intended to limit the present utility model. Any person skilled in the art can make some modifications or alterations to the above-described technical content to create equivalent embodiments without departing from the scope of the present utility model. Any simple modifications, equivalent changes, and alterations made to the above embodiments based on the technical essence of the present utility model without departing from the scope of the present utility model shall still fall within the scope of the present utility model.

Claims

1. A battery pack, characterized in that, include: shell; A flow channel plate is connected to the outer casing, and a cooling water channel is formed between the flow channel plate and the outer casing; An external extension tube is connected to the side of the flow channel plate away from the outer casing, the external extension tube is connected to the cooling water channel, and the external extension tube extends out of the flow channel plate and the outer casing; A water tap, which is connected to one end of the outer extension tube that extends out of the housing.

2. The battery pack according to claim 1, characterized in that, The flow channel plate is provided with a first water inlet that connects to the cooling water channel; The outer extension pipe has a transition cavity and a second water outlet communicating with the transition cavity, and the water nozzle is connected to the transition cavity; With the outer extension pipe connected to the flow channel plate, the first water inlet and the second water inlet are connected.

3. The battery pack according to claim 2, characterized in that, Includes a sealing ring, which is disposed between the flow channel plate and the outer extension tube, and the sealing ring seals the gap between the flow channel plate and the outer extension tube.

4. The battery pack according to claim 3, characterized in that, Includes a water outlet bushing, the water outlet bushing being connected to the flow channel plate, and the water outlet bushing being connected to the first water outlet; With the flow channel plate and the outer extension pipe connected, the water outlet bushing is inserted into the second water inlet, and the sealing ring is fitted around the outside of the water outlet bushing.

5. The battery pack according to claim 4, characterized in that, An annular stepped groove is provided on the outer extension pipe along the second water inlet; The sealing ring is located within the annular stepped groove.

6. The battery pack according to claim 1, characterized in that, The outer extension tube has a tube body and first winglets disposed on both sides of the tube body; The first vane is fixedly connected to the flow channel plate; The faucet is connected to the pipe body.

7. The battery pack according to claim 6, characterized in that, The system includes a fixing block, which corresponds one-to-one with the first winglet, and the fixing block is welded to the flow channel plate. The first winglet is attached to the fixing block; One end of the fastener passes through the first wing and is connected to the fixing block, while the other end of the fastener is confined to the first wing.

8. The battery pack according to claim 7, characterized in that, The flow channel plate is provided with a recessed portion; The fixing block is embedded in the recessed portion, and the fixing block is welded to the inner wall of the recessed portion.

9. A battery box, characterized in that, include: A housing, the housing having a horizontal frame and a longitudinal frame; The battery pack as described in any one of claims 1-8, wherein the battery pack is supported on the horizontal frame, the outer extension tube of the battery pack passes through the longitudinal frame and is fixedly connected to the longitudinal frame, and the water nozzle is provided at one end of the outer extension tube extending out of the longitudinal frame.

10. The battery box according to claim 9, characterized in that, A clearance opening is provided on the longitudinal frame; The outer extension tube passes through the clearance opening, and second winglets are respectively provided on both sides of the outer extension tube. The second winglets are fixed to the longitudinal frame by fasteners.

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