Integrated die-casting type battery box body plate

Abstract

The utility model discloses an integrated die-casting type battery box body plate which comprises a box plate, the box plate is integrally formed by adopting a die-casting process, the top of the box plate is used for placing a battery core body, the bottom of the box plate is provided with a cooling groove with an opening at the lower end, a bottom plate is fixedly arranged at the bottom of the box plate, and a closed space can be formed between the bottom plate and the cooling groove. Cooling liquid is injected into the closed space; parting strips are arranged in the cooling groove in an array mode, and a cooling channel is formed between any two adjacent parting strips; a water inlet and a water outlet are formed in one end of the cooling tank in the length direction, and cooling liquid flows into the cooling channel in the cooling tank through the water inlet and then can be discharged through the water outlet. The utility model has the beneficial effects that the processing of the box plate is more convenient and quicker through a die-casting integral forming method, and compared with the traditional splicing and welding of two cooling plates, the integral forming of the cooling groove is easier to ensure the formation of a closed space, so that the phenomenon of air leakage is avoided.

Description

Technical Field

[0001] This utility model relates to the field of battery box technology, specifically to an integrated die-cast battery box plate. Background Technology

[0002] Power batteries are a crucial component of new energy vehicles, directly providing them with power. While providing power, power batteries generate a significant amount of heat. If this heat is not dissipated in time, it will affect the battery's performance and lifespan, and may even cause a fire, resulting in injury or death. Therefore, automotive battery packs are equipped with cooling plates to ensure the battery remains within a reasonable temperature range.

[0003] In existing technologies, liquid cooling plates are widely used due to their high cooling efficiency and insensitivity to environmental factors. Liquid cooling plates primarily utilize the principle of heat transfer; the flow of coolant within the plate removes the heat generated by the battery. Currently, most liquid cooling plates on the market are composed of two plates and edge beams joined together by friction welding. This makes the overall manufacturing process of the liquid cooling plate very complex, and the finished product may also have the risk of leakage. Utility Model Content

[0004] In view of this, the present invention provides an integrated die-cast battery box plate, which aims to ensure product stability while reducing processing steps.

[0005] To achieve the above objectives, the technical solution of this utility model is as follows:

[0006] An integrated die-cast battery casing includes a casing panel, characterized in that: the casing panel is integrally formed by die casting; the top of the casing panel is used to place the battery cells; the bottom of the casing panel has a cooling groove with an open lower end; a base plate is fixedly installed on the bottom of the casing panel; a sealed space can be formed between the base plate and the cooling groove; the sealed space is used to inject coolant; partitions are arranged in an array in the cooling groove; a cooling channel is formed between any two adjacent partitions; an inlet and an outlet are provided at one end of the length direction of the cooling groove; the coolant flows into the cooling channel in the cooling groove through the inlet and can then be discharged through the outlet.

[0007] The above structure, through die-casting, makes the processing of the box panel more convenient and faster. Compared with the traditional method of splicing and welding two cooling plates, the one-piece molding of the cooling tank makes it easier to ensure the formation of a sealed space, thereby avoiding air leakage. The cooling channels can also increase the flow path of the coolant, ensuring the cooling effect.

[0008] Preferably, the battery box cover has symmetrically provided limiting protrusions on both sides in the width direction, which are used to limit the positioning of the battery box cover. This structure facilitates the positioning of the battery box cover.

[0009] Preferably, the limiting protrusion has a reference hole and a first mounting hole, which are used to position and install the box panel onto the vehicle body. This structure facilitates the installation of the box panel onto the vehicle body.

[0010] Preferably, the cooling groove is constructed in a rectangular shape, and the spacers are arranged in an array along its width direction, with the spacers located on the axis of symmetry of the cooling groove being wider than the other spacers. This structure ensures a more robust overall structure of the enclosure, facilitating the enclosure's support of the battery cells without product deformation.

[0011] Preferably, the spacers are arranged with the ends near the inlet and outlet protruding outwards, and the ends away from the inlet and outlet concave inwards. This structure facilitates the flow of coolant into each cooling channel and also facilitates the discharge of coolant from the outlet.

[0012] Preferably, the top of the casing has an open mounting slot, in which the battery cell is placed. This structure facilitates the installation of the battery cell.

[0013] Preferably, the casing panel has second mounting holes arranged in an array along its circumferential edge. Screws are inserted into these holes to facilitate the installation of the battery casing cover. This structure facilitates the installation of the battery casing cover.

[0014] Preferably, the cross-sectional dimensions of the base plate are adapted to the cross-sectional dimensions of the cooling tank, and the base plate is fixed to the edge of the cooling tank by friction welding. This structure allows for a more compact overall design.

[0015] Preferably, two crossbeams are arranged in parallel within the mounting slot, and the tops of both crossbeams are used to fix and install the battery expansion beam. This structure facilitates the installation of the expansion beam, thereby preventing the battery from being compressed by thermal expansion and thus affecting its service life.

[0016] Compared with the prior art, the beneficial effects of this utility model are:

[0017] 1. The integrated die-cast battery box panel provided by this utility model greatly simplifies the production process of the box panel through the die-casting process. The cooling tank is integrally formed by the die-casting process, which can better ensure airtightness compared with the traditional method of assembling and welding two cooling plates. The set cooling channels can increase the flow path of the coolant and ensure the cooling effect.

[0018] 2. Various holes can be formed through die casting without the need for additional drilling. The design of each hole also facilitates the installation of the box panel. Attached Figure Description

[0019] Figure 1 An exploded structural diagram of a one-piece die-cast battery box panel;

[0020] Figure 2 This is a structural schematic diagram of panel 1 (top view);

[0021] Figure 3 This is a structural schematic diagram of panel 1 (view from below);

[0022] Figure 4 A schematic diagram of the structure of a one-piece die-cast battery box panel (view from below). Detailed Implementation

[0023] The present invention will be further described below with reference to the embodiments and accompanying drawings.

[0024] Example 1:

[0025] like Figures 1 to 4 As shown, an integrated die-cast battery box panel includes a box panel 1, which is integrally formed by die casting. The top of the box panel 1 is used to place the battery core, and the bottom of the box panel 1 has a cooling groove 1a with an open bottom. A base plate 2 is also fixedly installed at the bottom of the box panel 1, and a sealed space can be formed between the base plate 2 and the cooling groove 1a. Coolant is injected into the sealed space. An array of spacers 1c is formed inside the cooling groove 1a, and a cooling channel 1d is formed between any adjacent spacers 1c. An inlet 1g and an outlet 1h are also formed at one end of the length direction of the cooling groove 1a. The coolant flows into the cooling channel 1d in the cooling groove 1a through the inlet 1g and can then be discharged through the outlet 1h.

[0026] The die-casting process makes the processing of the box plate 1 more convenient and faster. The cooling tank 1a is directly formed as a whole. Compared with the traditional method of splicing and welding two cooling plates, the integrated cooling tank 1a has better air tightness and is more stable. The cooling channel 1d increases the flow path of the coolant inside the cooling tank 1a, thereby increasing the heat absorption effect of the coolant. The formed inlet 1g and outlet 1h ensure that the coolant can circulate, which facilitates the removal of the absorbed heat.

[0027] like Figure 2 As shown, limiting protrusions 1b are symmetrically arranged on both sides of the width direction of the box plate 1. In this embodiment, three limiting protrusions 1b are evenly distributed on each side. The limiting protrusions 1b can limit the installation position of the battery box cover plate, thereby facilitating the rapid positioning of the battery box cover plate.

[0028] Furthermore, each limiting protrusion 1b is formed with a reference hole 1b1 and a first mounting hole 1b2. The reference hole 1b1 facilitates the positioning of the box plate 1 on the vehicle body, and the first mounting hole 1b2 allows bolts to be inserted to fix the box plate 1 on the vehicle body.

[0029] like Figure 2 As shown, second mounting holes 1f are evenly distributed along the circumferential edge of the box plate 1. Screws can be inserted into the second mounting holes 1f to fix the battery box cover to the top of the box plate 1.

[0030] In this embodiment, the cross-sectional dimensions of the base plate 2 are adapted to the cross-sectional dimensions of the cooling tank 1a, and the circumferential edge of the base plate 2 and the circumferential edge of the cooling tank 1a are fixedly installed by friction welding. This design allows for a more compact assembly between the box plate 1 and the base plate 2, and the friction welding method also ensures the airtightness of the cooling tank 1a, thereby preventing coolant leakage.

[0031] like Figure 3 As shown, the cooling tank 1a is constructed as a rectangular structure, and the partition bars 1c are arrayed along its width direction. The width of the partition bar 1c located on the axis of symmetry of the cooling tank 1a is wider than the width of the other partition bars 1c. This design can increase the overall structural strength of the box panel 1 and prevent the product from deforming when the box panel 1 is under load or pressure.

[0032] Furthermore, the end of the spacer 1c closest to the inlet 1g and outlet 1h is convex outwards, while the end of the spacer 1c furthest from the inlet 1g and outlet 1h is concave inwards. That is, the closer the spacer 1c is to the inlet 1g and outlet 1h in the width direction, the farther it is from the inlet 1g and outlet 1h in the length direction; similarly, the closer the spacer 1c is to the inlet 1g and outlet 1h in the width direction, the farther it is from the inlet 1g and outlet 1h in the length direction. This design facilitates the flow of coolant from the inlet 1g into each cooling channel 1d, and also facilitates the discharge of coolant from the outlet 1h.

[0033] like Figure 2 As shown, a mounting groove 1e with an open top is formed on the top of the casing 1, and the battery cell is placed in the mounting groove 1e. This design facilitates the installation of the battery cell.

[0034] Furthermore, two crossbeams 1i are placed parallel to each other within the mounting slot 1e. The tops of both crossbeams 1i are used to fix and install the battery expansion beam. This design can prevent the battery from being compressed due to thermal expansion, thus affecting its normal service life. In this embodiment, the tops of both crossbeams 1i are formed with positioning mounting holes 1i1, which facilitate the positioning and installation of the battery expansion beam. In addition, a mounting bracket 1j is provided between one of the crossbeams 1i and one side of the box plate 1. The mounting bracket 1j can be used to fix and install the battery management system.

[0035] Example 2:

[0036] A method for manufacturing the integral die-cast battery casing plate described in Embodiment 1 includes the following steps:

[0037] Step 1: Prepare the die-casting mold and metal raw materials for processing panel 1. In this embodiment, aluminum is preferred as the processing raw material for panel 1.

[0038] Step 2: Heat the aluminum metal until it is melted into a liquid state.

[0039] Step 3: Use a die-casting machine to inject liquid aluminum into the mold.

[0040] Step 4: After the liquid aluminum cools and solidifies, demold it to obtain the required box panel 1.

[0041] Step 5: Grind and trim the demolded box panel 1.

[0042] Step 6: Cut a base plate 2 that is compatible with the bottom cross section of the cooling tank 1a. In this embodiment, aluminum is also preferred as the raw material for the base plate 2.

[0043] Step 7: Clamp the box plate 1 after grinding and trimming in Step 5 and the base plate 2 cut in Step 6 onto the friction welding fixture, and weld the edge of the base plate 2 to the circumferential edge of the cooling tank 1a using friction welding technology.

[0044] Step 8: Grind the friction weld beads from Step 7.

[0045] Step Nine: Connect both the inlet 1g and outlet 1h to the airtight device and introduce air into the cooling tank 1a to complete the airtightness test. In this embodiment, the gas pressure range introduced into the cooling tank 1a through the airtight device is 300±5KPA, and the test time is 180s. When the measured leakage value is less than or equal to 70Pa, it indicates that the airtightness of the integrated die-cast battery box plate is qualified.

[0046] Step 10: Spray PVC onto the bottom of the integrated die-cast battery box panel that has passed the airtightness test. In this embodiment, spraying PVC serves as an anti-collision function.

[0047] Step 11: After the PVC has dried, pack the one-piece die-cast battery box panel into the warehouse.

[0048] Based on the above steps, the box plate 1 can be easily obtained through die casting without the need for additional hole opening. The cooling tank 1a is integrally formed by die casting. Compared with the traditional splicing and welding of two cooling plates, the airtightness of the cooling tank 1a is more stable and easier to achieve.

[0049] Finally, it should be noted that the above description is merely a preferred embodiment of the present utility model. Those skilled in the art, under the guidance of the present utility model, can make various similar representations without departing from the spirit and claims of the present utility model, and such modifications all fall within the protection scope of the present utility model.

Claims

1. A one-piece die-cast battery box panel, comprising a box panel (1), characterized in that: The box plate (1) is integrally formed by die casting process. The top of the box plate (1) is used to place the battery core. The bottom of the box plate (1) has a cooling groove (1a) with an open bottom. A base plate (2) is fixedly installed at the bottom of the box plate (1). A sealed space can be formed between the base plate (2) and the cooling groove (1a). The sealed space is used to inject coolant. The cooling tank (1a) is provided with an array of partition bars (1c), and a cooling channel (1d) is formed between any two adjacent partition bars (1c); The cooling tank (1a) is provided with an inlet (1g) and an outlet (1h) at one end along its length. The coolant flows into the cooling channel (1d) in the cooling tank (1a) through the inlet (1g) and can then be discharged through the outlet (1h).

2. The integrated die-cast battery box plate according to claim 1, characterized in that: The box panel (1) has symmetrical limiting protrusions (1b) on both sides in the width direction. The limiting protrusions (1b) are used to limit the upper cover of the battery box.

3. The integrated die-cast battery box plate according to claim 2, characterized in that: The limiting protrusion (1b) has a reference hole (1b1) and a first mounting hole (1b2), which are used to position and install the box plate (1) on the vehicle body.

4. The integrated die-cast battery box plate according to claim 1, characterized in that: The cooling tank (1a) is constructed into a rectangular structure, and the partition bars (1c) are arranged in an array along its width direction. The partition bars (1c) located on the axis of symmetry of the cooling tank (1a) are wider than the other partition bars (1c).

5. The integrated die-cast battery box plate according to claim 4, characterized in that: The spacer bar (1c) is distributed in an outward convex manner at one end near the inlet (1g) and outlet (1h); The spacer bar (1c) is distributed in an inwardly concave manner at the end furthest from the inlet (1g) and outlet (1h).

6. The integrated die-cast battery box plate according to claim 1, characterized in that: The top of the box plate (1) has an open mounting groove (1e), and the battery core is placed in the mounting groove (1e).

7. The integrated die-cast battery box plate according to claim 1, characterized in that: The box panel (1) has a second mounting hole (1f) arranged in an array along its circumferential edge. The second mounting hole (1f) is used to insert screws to facilitate the installation of the battery box cover.

8. The integrated die-cast battery box plate according to claim 1, characterized in that: The cross-sectional dimensions of the base plate (2) are adapted to the cross-sectional dimensions of the cooling tank (1a), and the base plate (2) and the edge of the cooling tank (1a) are fixed by friction welding.

9. The integrated die-cast battery box plate according to claim 6, characterized in that: Two crossbeams (1i) are arranged in parallel within the mounting groove (1e), and the top of each crossbeam (1i) is used to fix and install the battery expansion beam.

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