New energy power battery and automobile

Abstract

The application relates to a new energy power battery and a car, which comprise a liquid cooling plate, at least two battery modules are installed on the top surface of the liquid cooling plate, all the battery modules are arranged at intervals along a certain direction, a first blocking strip is arranged between every two adjacent battery modules, a flow guide groove is arranged between the battery module and the corresponding first blocking strip, a flow guide hole is arranged on the bottom wall of the flow guide groove, the flow guide hole is a through hole, and the area of the bottom wall of the flow guide groove is larger than the cross-sectional area of the flow guide hole. The application controls heat diffusion in a local range, and reduces the risk of fire and explosion of the power battery after thermal runaway.

Description

Technical Field

[0001] The present invention relates to the field of new energy vehicle technology, and in particular to new energy battery technology. Background Art

[0002] To address heat dissipation during use, the mainstream solution for new energy power batteries is to use a combination of liquid cooling plates and thermally conductive adhesive to cool the bottom of the module. To ensure assembly process performance, the liquid cooling plates are typically large flat surfaces that can cover multiple modules, connected by plastic pipes. However, to prevent the power batteries from catching fire or exploding, thermal insulation design minimizes cross-interference between modules.

[0003] according to Figure 1 As shown, multiple battery modules 2 are assembled on the top surface of the liquid cooling plate 1. The battery modules 2 are arranged at intervals and have no related heat insulation mechanism. If one of the battery modules 2 is damaged and the molten metal flows out, it will flow to the adjacent battery module 2, causing damage to the adjacent battery module. Summary of the Invention

[0004] The purpose of the present invention is to provide a new energy power battery to solve the problem that when one battery module is damaged, the molten metal will flow out and flow to the adjacent battery module and cause damage; the second purpose is to provide a car.

[0005] In order to achieve the above object, the technical solution adopted by the present invention is as follows:

[0006] A new energy power battery includes a liquid cooling plate, wherein at least two battery modules are mounted on the top surface of the liquid cooling plate, and all the battery modules are arranged at intervals along a certain direction, and a first blocking bar is provided between every two adjacent battery modules, and a guide groove is provided between the battery module and its corresponding first blocking bar, and a guide hole is provided on the bottom wall of the guide groove, and the guide hole is a through hole, and the area of ​​the bottom wall of the guide groove is larger than the cross-sectional area of ​​the guide hole.

[0007] By adopting the above technical means, since a first barrier bar is provided between every two adjacent battery modules, it is equivalent to separating the two battery modules and cutting off the path of the molten aluminum flowing to the adjacent battery modules, so that the high-temperature molten aluminum will not affect the adjacent battery modules, so as to ensure that the thermal runaway airflow does not directly affect the protected parts. Since a guide groove is provided between the first barrier bar and the battery module, the molten aluminum can accumulate in the guide groove. Since a guide hole is provided on the bottom wall of the guide groove, the guide hole is a through hole, and the area of ​​the bottom wall of the guide groove is larger than the cross-sectional area of ​​the guide hole, initially, part of the molten aluminum can accumulate in the guide groove. Under the action of the liquid cooling plate, this part of the molten aluminum can be cooled and its heat can be quickly taken away. When the molten aluminum in the guide groove increases, the cooled molten aluminum flows out from the guide hole, and the newly added molten aluminum continues to accumulate in the guide groove for cooling.

[0008] Furthermore, both ends of the first blocking bar are connected to a baffle, so that the combination of the baffle and the first blocking bar is in an "I" shape.

[0009] By adopting the above technical means, the outflow of molten aluminum from the edge of the liquid cooling plate can be reduced.

[0010] Furthermore, the first blocking bar is welded to the liquid cooling plate.

[0011] The above technical means are adopted to improve the stability of the first barrier strip.

[0012] Furthermore, a cooling channel is provided on the liquid cooling plate, and the cooling channel includes a cooling tube, and a portion of the cooling tube body extends out of the top surface of the liquid cooling plate, and a second blocking bar is provided between the cooling tube and the adjacent battery module.

[0013] By adopting the above technical means, the cooling pipe can be protected from being damaged by the aluminum melt.

[0014] Furthermore, the second blocking bar has a bend, and the bend extends in a direction away from the cooling pipe, so that the second blocking bar is constructed in an L-shape.

[0015] By adopting the above technical means, the flow rate of the molten aluminum flowing out from the edge of the liquid cooling plate can be reduced.

[0016] Furthermore, a filling layer made of heat insulating material is provided inside the first barrier bar and the second barrier bar.

[0017] The above-mentioned technical means can reduce the impact of high-temperature gas on adjacent battery modules and cooling pipes.

[0018] Furthermore, foam is provided at the bottom of the liquid cooling plate for supporting the liquid cooling plate.

[0019] A car comprises a body, on which the above-mentioned new energy power battery is assembled.

[0020] Beneficial effects of the present invention:

[0021] The present invention uses the first barrier bar to block the aluminum melt formed at high temperature after thermal runaway, cutting off the new heat transfer path generated by its flow; the guide groove accommodates the high-temperature material, and the heat exchange between the coolant and the high-temperature material quickly dissipates the heat, reducing the risk of thermal diffusion in other battery cells or modules; the battery module is separated by heat, and the cooling pipe is insulated to protect it to maintain a certain heat dissipation capacity, thereby achieving heat diffusion control within a local range, reducing the risk of fire and explosion after thermal runaway of the power battery. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 A schematic diagram of the assembly method of the liquid cooling plate and the battery module in the prior art;

[0023] Figure 2 It is a schematic diagram of the structure of the present invention;

[0024] Figure 3 This is a diagram of the cooling channel design of the present invention, wherein the dotted arrow direction is the cooling water flow direction;

[0025] Figure 4 Schematic diagram of the assembly method of the liquid cooling plate, the guide groove, the guide hole, the first blocking bar and the second blocking bar in the present invention;

[0026] Figure 5 This is a schematic diagram of the upper perspective of the present invention;

[0027] Figure 6 For Figure 5 A cross-sectional view taken along line AA of FIG.

[0028] Figure 7 It is a partial top view schematic diagram of the present invention;

[0029] Figure 8 Schematic diagram of the positional relationship between the water inlet, water outlet, diversion hole, liquid cooling plate, and foam;

[0030] Figure 9 For Figure 4 Schematic diagram of the cross section taken at CC.

[0031] Among them, 1-liquid cooling plate; 2-battery module; 3-cooling pipe; 4-foam; 5-guide groove; 6-guide hole; 7-first blocking bar; 8-second blocking bar; 9-baffle; 10-water inlet; 11-water outlet. DETAILED DESCRIPTION

[0032] The following will describe the implementation of the technical solution of the present invention with reference to the accompanying drawings and preferred embodiments. Those skilled in the art can easily understand other advantages and effects of the present invention from the contents disclosed in this specification. The present invention can also be implemented or applied through other different specific embodiments, and the details in this specification can also be modified or changed in various ways based on different viewpoints and applications without departing from the spirit of the present invention. It should be understood that the preferred embodiments are only for the purpose of illustrating the present invention and are not intended to limit the scope of protection of the present invention.

[0033] It should be noted that the illustrations provided in the following embodiments are merely schematic illustrations of the basic concept of the present invention. Therefore, the illustrations only show components related to the present invention and are not drawn according to the number, shape, and size of components in actual implementation. In actual implementation, the type, quantity, and proportion of each component may be changed arbitrarily, and the component layout may also be more complex.

[0034] This embodiment proposes a new energy power battery, such as Figure 2-Figure 9 As shown, it includes a liquid cooling plate 1, which is constructed as a rectangular body. Four battery modules 2 are provided on the top surface of the liquid cooling plate 1. The four battery modules 2 are arranged in sequence along the length direction of the top surface of the liquid cooling plate 1. The battery modules 2 are connected to the liquid cooling plate 1 through thermal conductive glue.

[0035] The liquid cooling plate 1 is provided with a cooling channel, which includes a cooling pipe 3. Part of the cooling pipe 3 extends out of the top surface of the liquid cooling plate 1, and the rest of the cooling channel is integrated into the interior of the liquid cooling plate 1. The liquid cooling plate 1 is provided with a water inlet 10 and a water outlet 11. The cooling water enters the liquid cooling plate 1 from the water inlet 10 and then passes through the cooling pipe 3. Figure 3 The water flows out from the water outlet 11 in the flow manner shown by the dotted arrow to exchange heat with the cooling water.

[0036] In this embodiment, the cooling pipe 3 is located at the edge of the top surface of the liquid cooling plate 1 .

[0037] A first barrier bar 7 is arranged between adjacent battery modules 2. The first barrier bar 7 extends along the width direction of the top surface of the liquid cooling plate 1, and the length of the first barrier bar 7 is equal to the width of the top surface of the cooling tube 3. The height of the first barrier bar 7 is adaptively designed according to the height of the protected battery module 2 and the height of the protected battery cell to ensure that the thermal runaway airflow does not directly affect the protected components.

[0038] The first barrier bar 7 is combined with the liquid cooling plate 1 by welding or other means to ensure that the two form an integrated structure. The first barrier bar 7 blocks between two adjacent battery modules 2. When one battery module 2 is damaged and the molten aluminum flows out, the first barrier bar 7 effectively blocks the molten aluminum from flowing to the adjacent battery module 2.

[0039] To protect the cooling tube 3, a second barrier bar 8 is provided between the battery module 2 adjacent to the cooling tube 3 and the cooling tube 3. The second barrier bar 8 is an L-shaped structure that prevents most of the molten aluminum from overflowing from the edge of the cold plate during thermal runaway. The L-shaped structure requires a slight gap from the module to ensure a smooth assembly process.

[0040] The interiors of the first barrier bars 7 and the second barrier bars 8 are filled with a filling layer made of a heat-insulating material to prevent the heat of the aluminum melt from damaging the adjacent battery modules 2 .

[0041] Baffles 9 are provided at both ends of the first barrier bar 7, so that the combination of the first barrier bar 7 and the baffle 9 forms an "I" shape. When molten aluminum is generated in a certain battery module 2, the molten aluminum cannot flow out from the edge of the liquid cooling plate 1, but first gathers in the space enclosed by the battery module 2, the baffle 9 and the first barrier bar 7. During this process, the molten aluminum is cooled faster under the action of the liquid cooling plate 1, thereby reducing the temperature of the molten aluminum and allowing its heat to be quickly discharged.

[0042] Guide grooves 5 are provided on both sides of each battery module 2 , one of which is provided between the second barrier bar 8 and the corresponding battery module 2 , and the remaining guide grooves 5 are provided between the battery module 2 and the corresponding first barrier bar 7 .

[0043] The bottom wall of the guide trough 5 is provided with a guide hole 6. The cross-sectional area of ​​the guide hole 6 is smaller than the area of ​​the bottom wall of the guide trough 5. When a battery module 2 is damaged, causing molten aluminum to flow out, the first and second barrier bars 7 and 8 prevent the molten aluminum from flowing to the battery module 2 adjacent to the battery module 2, and instead flow into the corresponding guide trough 5. Because the guide hole 6 is provided in the guide trough 5 and the guide hole 6 is a through hole, the guide trough 5 is initially used to accommodate the molten aluminum after thermal runaway. During this process, the heat of the molten aluminum is rapidly dissipated by the liquid cooling plate 1. When the molten aluminum accumulates to a certain volume in the guide trough 5, the cooled molten aluminum can flow through the guide hole 6 onto the bottom plate, rather than out of the edge of the liquid cooling plate 1. The guide hole 6 should avoid the flow path of the coolant circulation.

[0044] A plurality of foams 4 are provided at the bottom of the liquid cooling plate 1 to support the liquid cooling plate 1 .

[0045] The new energy power battery in this embodiment solves the following three problems: First, the first and second barrier bars 7 and 8 block the high-temperature molten aluminum formed after thermal runaway, cutting off the new heat transfer path created by its flow. Second, the guide grooves 5 contain the high-temperature material and exchange heat with the coolant, quickly dissipating heat and reducing the risk of thermal diffusion in other battery cells or modules. Third, the rational design of the height of the first and second barrier bars 7 and 8 reduces the impact of high-temperature airflow on adjacent battery modules 2 and cooling pipes 3 after thermal runaway. By isolating the battery modules 2 and insulating the cooling pipes to maintain a certain heat dissipation capacity, heat diffusion is controlled locally, thereby achieving the goal of preventing fire and explosion after thermal runaway of the power battery.

[0046] This embodiment also provides a car, including a car body, which is provided with the above-mentioned new energy power battery.

[0047] The above embodiments are only preferred embodiments for fully illustrating the present invention, and the protection scope of the present invention is not limited thereto. Any equivalent substitution or modification made by those skilled in the art based on the present invention is within the protection scope of the present invention.

Claims

1. A new energy power battery, comprising a liquid cooling plate (1), wherein at least two battery modules (2) are mounted on the top surface of the liquid cooling plate (1), and all battery modules (2) are arranged at intervals along a certain direction, characterized in that: A first blocking bar (7) is provided between each two adjacent battery modules (2), a guide groove (5) is provided between the battery module (2) and its corresponding first blocking bar (7), a guide hole (6) is provided on the bottom wall of the guide groove (5), the guide hole (6) is a through hole, and the area of ​​the bottom wall of the guide groove (5) is larger than the cross-sectional area of ​​the guide hole (6).

2. The new energy power battery according to claim 1, characterized in that: Both ends of the first blocking bar (7) are connected to baffles (9), so that the combination of the baffles (9) and the first blocking bar (7) is an "I" shape.

3. The new energy power battery according to claim 2, characterized in that: The first blocking strip (7) is welded to the liquid cooling plate (1).

4. The new energy power battery according to claim 3, characterized in that: The liquid cooling plate (1) is also provided with a cooling channel, the cooling channel comprising a cooling tube (3), a portion of the cooling tube (3) extending out of the top surface of the liquid cooling plate (1), and a second blocking bar (8) being provided between the cooling tube (3) and the adjacent battery module (2).

5. The new energy power battery according to claim 4, characterized in that: The second blocking strip (8) has a bend, which extends in a direction away from the cooling tube (3), so that the second blocking strip (8) is constructed in an L-shape.

6. The new energy power battery according to claim 5, characterized in that: The first barrier strip (7) and the second barrier strip (8) are both provided with a filling layer made of a heat-insulating material inside.

7. The new energy power battery according to claim 1, characterized in that: The bottom of the liquid cooling plate (1) is provided with foam (4) for supporting the liquid cooling plate (1).

8. An automobile, comprising a vehicle body, characterized in that: The vehicle body is equipped with a new energy power battery as described in any one of claims 1 to 7.

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