Reinforcing beam, battery box and battery pack

Abstract

The utility model relates to the technical field of new energy batteries, in particular to a stiffening beam, a battery box and a battery pack, the stiffening beam comprises a transverse plate and a vertical plate, the transverse plate and the vertical plate are vertically connected with each other, and the transverse plate and the vertical plate are arranged in a T shape. In the application, the T-shaped reinforcing beam is formed by the transverse plate and the vertical plate, so that the problems that a traditional square reinforcing beam is large in placing randomness during welding, needs to be positioned by a tool, is affected by welding deformation, is difficult to control in precision such as position tolerance and planeness, affects the PACK assembly efficiency, is poor in welding quality, and the like are solved. And the perpendicularity of the stiffening beam and the bottom plate is difficult to guarantee.

Description

Technical Field

[0001] The present application relates to the field of new energy battery technology, and in particular to a reinforcing beam, a battery box and a battery pack. Background Art

[0002] In order to improve the safety of energy storage batteries, general battery boxes are equipped with reinforcement beams to strengthen the structural strength of the battery box while improving the heat dissipation capacity of the battery box to prevent fire, explosion and other phenomena during the operation of the energy storage battery.

[0003] Typically, the reinforcing beam is a square structure that needs to be fixed to the battery box bottom plate by fillet welding or welding connecting blocks to the bottom plate, and then bolting. The fillet welding process results in a small contact surface between the reinforcing beam and the bottom plate in the Z direction, and no contact surface in the X and Y directions. The placement during welding is quite random, requiring positioning by tooling. Combined with the influence of welding deformation, its position tolerance, verticality, flatness and other precision are difficult to control, affecting the efficiency of the pack assembly. When the bolt assembly process is used, the verticality of the reinforcing beam and the bottom plate of the box body depends on the parallelism of the connecting surface of the connecting block and the bottom plate, as well as the overlap of the connecting surface of each connecting block, making it difficult to ensure the verticality of the reinforcing beam and the bottom plate. Utility Model Content

[0004] The present application provides a reinforcing beam, a battery box and a battery pack, which aim to solve the problems brought by traditional square reinforcing beams, such as the large randomness of placement during welding, the need to rely on tooling for positioning, and the influence of welding deformation. Its position tolerance, verticality, flatness and other precisions are difficult to control, affecting the PACK assembly efficiency, and the difficulty in ensuring the verticality of the reinforcing beam and the base plate.

[0005] In order to solve the above technical problems, the first aspect of the present application proposes a reinforcement beam, which includes: a transverse plate and a vertical plate;

[0006] The transverse plates and the vertical plates are vertically connected to each other, and the transverse plates and the vertical plates are arranged in a T-shape.

[0007] Furthermore, the vertical plate includes a first vertical plate and a second vertical plate, the first vertical plate and the second vertical plate are spaced apart from each other, and an air duct is formed between the first vertical plate and the second vertical plate, the first vertical plate is provided with a plurality of first exhaust ports, and the second vertical plate is provided with a plurality of second exhaust ports, and the first exhaust ports and the second exhaust ports are both connected to the air duct.

[0008] Furthermore, a plurality of air blocking portions are provided in the air duct, and the air blocking portions are provided corresponding to the first exhaust port and the second exhaust port to buffer the gas in the air duct.

[0009] Furthermore, the air baffle portion includes a first air baffle plate and a second air baffle plate, the first air baffle plate is fixedly connected to the first vertical plate and / or the second vertical plate, and the first air baffle plate and the second air baffle plate are vertically connected to each other.

[0010] Furthermore, the reinforcing beam also includes a first liquid cooling plate, and the first vertical plate and the second vertical plate are both fixedly mounted with the first liquid cooling plate. The first liquid cooling plate is provided with a plurality of third exhaust ports, and the third exhaust ports correspond to the first exhaust ports and the second exhaust ports.

[0011] Furthermore, the vertical plate further comprises a third vertical plate, in which a liquid channel is provided, and the third vertical plate is further provided with a water inlet and a water outlet connected to the liquid channel.

[0012] Furthermore, the transverse plate is provided with a plurality of cavities.

[0013] In a second aspect, the present application provides a battery box, comprising a reinforcing beam as described in any one of the above items.

[0014] Furthermore, the battery box includes a bottom plate, and the transverse plate is fixed to the bottom plate by a stir friction welding process.

[0015] A third aspect of the present application provides a battery pack, comprising a battery box as described in any one of the above items.

[0016] The beneficial effects of the present application are: in the reinforcing beam, battery box and battery pack provided by the present application, the reinforcing beam includes a transverse plate and a vertical plate, the transverse plate and the vertical plate are vertically connected to each other, and the transverse plate and the vertical plate are arranged in a T-shape. Since the transverse plate has a larger surface area, the T-shaped reinforcing beam can be fixed by a stir friction welding process. Compared with the traditional square reinforcing beam using a fillet welding process or a bolt assembly process, the stir friction welding process reduces the use of tooling during the welding process. At the same time, during the welding process, the position tolerance, flatness and other accuracies of the reinforcing beam can be better controlled, and since the vertical plate and the transverse plate are prefabricated into a T-shape, the verticality of the reinforcing beam can be effectively guaranteed. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following briefly introduces the drawings required for describing the embodiments. Obviously, the drawings described below are only some embodiments of the present application. For those skilled in the art, other drawings can be obtained based on these drawings without inventive efforts. Among them:

[0018] Figure 1 This is a schematic diagram of the three-dimensional structure of the reinforcing beam and the battery box in one embodiment of the utility model;

[0019] Figure 2 This is a schematic diagram of the three-dimensional structure of a T-shaped exhaust reinforcement beam according to an embodiment of the present invention;

[0020] Figure 3 This is a cross-sectional view of a T-shaped exhaust reinforcement beam according to an embodiment of the present invention;

[0021] Figure 4 This is a schematic diagram of the three-dimensional structure of a T-shaped liquid-cooled reinforcement beam according to an embodiment of the present invention;

[0022] Figure 5 This is a cross-sectional view of a T-shaped liquid-cooled reinforcement beam according to an embodiment of the present invention;

[0023] Figure 6 This is a schematic diagram of the three-dimensional structure of a T-shaped exhaust reinforcement beam after removing the liquid cooling plate in one embodiment of the present invention.

[0024] Explanation of the accompanying drawings: 100, T-shaped exhaust reinforcement beam; 110, first vertical plate; 111, first exhaust port; 120, second vertical plate; 121, second exhaust port; 130, first horizontal plate; 140, air baffle; 141, first air baffle plate; 142, second air baffle plate; 150, first liquid cooling plate; 151, third exhaust port; 152, fixing hole; 160, first connecting plate; 170, second connecting plate; 200, T-shaped liquid cooling reinforcement beam; 210, third vertical plate; 211, liquid channel; 212, water inlet; 213, water outlet; 220, second horizontal plate; 230, first blocking block; 240, second blocking block; 300, cavity; 400, battery box; 410, bottom plate. DETAILED DESCRIPTION

[0025] In order to make the purpose, technical solutions and advantages of this application more clear, the following further describes this application in detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain this application and are not intended to limit this application.

[0026] Those skilled in the art will understand that, unless otherwise stated, the singular forms "a", "an", "above", and "the" used herein may also include plural forms. It should be further understood that the term "comprising" used in the specification of this application refers to the presence of features, integers, steps, operations, elements, modules, modules and / or components, but does not exclude the presence or addition of one or more other features, integers, steps, operations, elements, modules, modules, components and / or groups thereof. It should be understood that when we refer to an element as being "connected" or "coupled" to another element, it can be directly connected or coupled to the other element, or there may be intermediate elements. In addition, "connected" or "coupled" as used herein may include wireless connections or wireless couplings. The term "and / or" used herein includes all or any module and all combinations of one or more associated listed items.

[0027] It will be understood by those skilled in the art that, unless otherwise defined, all terms (including technical and scientific terms) used herein have the same meaning as commonly understood by those skilled in the art to which this application belongs. It should also be understood that terms such as those defined in common dictionaries should be understood to have meanings consistent with their meanings in the context of the prior art and will not be interpreted in an idealized or overly formal sense unless specifically defined as herein.

[0028] like Figure 1 and Figure 2 As shown, the present application provides a reinforcing beam, which includes a transverse plate and a vertical plate. The transverse plate and the vertical plate are vertically connected to each other, and the transverse plate and the vertical plate are arranged in a T shape.

[0029] In a specific embodiment, the reinforcing beam includes a transverse plate and a vertical plate. The transverse plate is parallel to and fits closely with the bottom plate of the external battery box, and the vertical plate is vertically connected to the side of the transverse plate away from the bottom plate of the battery box, so that the transverse plate and the vertical plate are combined into a T shape. Preferably, the vertical plate and the transverse plate are integrally formed to enhance the overall strength of the reinforcing beam.

[0030] like Figure 2 and Figure 6 As shown, the vertical plate includes a first vertical plate 110 and a second vertical plate 120. The first vertical plate 110 and the second vertical plate 120 are spaced apart from each other, and an air passage is formed between the first vertical plate 110 and the second vertical plate 120. The first vertical plate 110 is provided with a plurality of first exhaust ports 111, and the second vertical plate 120 is provided with a plurality of second exhaust ports 121. Both the first exhaust ports 111 and the second exhaust ports 121 are connected to the air passage, and the first exhaust ports 111 and the second exhaust ports 121 are symmetrically arranged.

[0031] In one specific embodiment, the vertical plates include a first vertical plate 110 and a second vertical plate 120. The first vertical plate 110 and the second vertical plate 120 are substantially rectangular and spaced apart from each other in parallel. The transverse plates include a first transverse plate 130. The first transverse plate 130 is in the shape of a rectangular parallelepiped and is parallel to and aligned with the bottom plate of the external battery box. The first vertical plate 110 and the second vertical plate 120 are both perpendicular to the first transverse plate 130 and are both located in the middle of the surface of the first transverse plate 130, so that the first vertical plate 110, the second vertical plate 120, and the first transverse plate 130 form a T-shaped reinforcement beam.

[0032] A first connecting plate 160 and a second connecting plate 170 are disposed between the first vertical plate 110 and the second vertical plate 120. The first connecting plate 160 and the second connecting plate 170 are rectangular and spaced apart from each other in parallel. The first connecting plate 160 is positioned above the second connecting plate 170. The first connecting plate 160 and the second connecting plate 170 are fixedly connected to the first vertical plate 110 and the second vertical plate 120 on either side, forming a stable structure. The space enclosed by the first connecting plate 160, the second connecting plate 170, the first vertical plate 110, and the second vertical plate 120 serves as an airway.

[0033] A plurality of first exhaust ports 111 are provided on the first vertical plate 110, and a plurality of second exhaust ports 121 are provided on the second vertical plate 120. The first exhaust ports 111 extend through the first vertical plate 110, and the second exhaust ports 121 extend through the second vertical plate 120, such that both the first exhaust ports 111 and the second exhaust ports 121 are in communication with the airway. Preferably, the first exhaust ports 111 and the second exhaust ports 121 have the same shape to facilitate uniform passage of gas through the reinforcing beam. In another specific embodiment, the first exhaust ports 111 and the second exhaust ports 121 have different shapes. The first exhaust ports 111 and the second exhaust ports 121 are arranged in a matrix, with the plurality of first exhaust ports 111 and the plurality of second exhaust ports 121 arranged symmetrically.

[0034] like Figure 3 As shown, a plurality of air baffles 140 are provided in the air duct, and the air baffles 140 are arranged corresponding to the first exhaust port 111 and the second exhaust port 121. The air baffles 140 include a first air baffle plate 141 and a second air baffle plate 142. The first air baffle plate 141 is fixedly connected to the first vertical plate 110 and / or the second vertical plate 120, and the first air baffle plate 141 and the second air baffle plate 142 are vertically connected to each other.

[0035] In a specific embodiment, a plurality of air baffles 140 are provided in the air duct, and the air baffles 140 are arranged corresponding to the first exhaust port 111 and the second exhaust port 121. The air baffles 140 include a second air baffle plate 142 and a first air baffle plate 141. The second air baffle plate 142 and the first air baffle plate 141 are both rectangular. The first air baffle plate 141 is perpendicular to the first vertical plate 110, and the two sides of the first air baffle plate 141 are fixedly connected to the first vertical plate 110 and the second vertical plate 120 respectively. The second air baffle plate 142 is parallel to the first vertical plate 110. Preferably, the first air baffle plate 141 and the second air baffle plate 142 are cross-connected vertically to form a cross-shaped structure, so that the gas is buffered when flowing through the air duct to prevent the gas from spraying at the first exhaust port 111 and the second exhaust port 121. In another specific embodiment, the first air baffle plate 141 and the second air baffle plate 142 are perpendicular and connected in a T-shape. Preferably, the first air baffles 141 are distributed at equal distances, so that the reinforcement beam has a better exhaust effect.

[0036] like Figure 2 As shown, the reinforcing beam also includes a first liquid cooling plate 150, which is fixedly mounted on the first vertical plate 110 and / or the second vertical plate 120. The first liquid cooling plate 150 is provided with a plurality of third exhaust ports 151, which correspond to the first exhaust ports 111 and / or the second exhaust ports 121.

[0037] In a specific embodiment, the first vertical plate 110 and the second vertical plate 120 are both provided with a plurality of threaded holes, and the plurality of threaded holes are evenly distributed on the first vertical plate 110 and the second vertical plate 120. The reinforcing beam also includes two first liquid cooling plates 150. The shape of the first liquid cooling plate 150 is adapted to the shape of the first vertical plate 110 and the second vertical plate 120. The first liquid cooling plate 150 is perpendicular to the first horizontal plate 130. A plurality of fixing holes 152 are provided on the first liquid cooling plate 150. The plurality of fixing holes 152 correspond one-to-one to the plurality of threaded holes. The two first liquid cooling plates 150 are respectively attached to the surfaces of the first vertical plate 110 and the second vertical plate 120. Screws pass through the fixing holes 152 and the threaded holes to fix the two first liquid cooling plates 150 to the first vertical plate 110 and the second vertical plate 120 respectively. A plurality of third exhaust ports 151 are provided on the first liquid cooling plate 150. These third exhaust ports 151 correspond one-to-one with the first exhaust ports 111 and the second exhaust ports 121. The shapes of the third exhaust ports 151 match those of the first exhaust ports 111 and the second exhaust ports 121, allowing gas to pass smoothly through the first exhaust ports 111, the second exhaust ports 121, and the third exhaust ports 151. In another embodiment, the first liquid cooling plate 150 is mounted only on the side of the first vertical plate 110 or the second vertical plate 120.

[0038] Since the traditional reinforcing beam adopts the staggered first exhaust port 111 and the second exhaust port 121 to buffer the gas passing through the reinforcing beam, the third exhaust port 151 on the first liquid cooling plate 150 needs to be set into two types to match the staggered first exhaust port 111 and the second exhaust port 121 respectively, resulting in increased processing complexity of the structure of the first liquid cooling plate. The first exhaust port 111 and the second exhaust port 121 in the present application are symmetrically arranged and an air blocking portion 140 is provided to buffer the gas, so that the third exhaust port on the first liquid cooling plate 150 only needs to be set into one type, thereby reducing the structural complexity of the first liquid cooling plate 150.

[0039] In summary, the first liquid cooling plate 150 , the first vertical plate 110 , the second vertical plate 120 , the first transverse plate 130 , and the air blocking portion 140 constitute the T-shaped exhaust reinforcement beam 100 .

[0040] like Figure 4 As shown, the vertical plate further includes a third vertical plate 210 , in which a liquid channel 211 is provided. The third vertical plate 210 is also provided with a water inlet 212 and a water outlet 213 that are in communication with the liquid channel 211 .

[0041] In a specific embodiment, the vertical plate also includes a third vertical plate 210, which is in the shape of a rectangular parallelepiped. The third vertical plate 210 is vertically arranged, and the third vertical plate 210 is provided with a plurality of liquid channels 211. The liquid channels 211 pass through the third vertical plate 210 horizontally. The plurality of liquid channels 211 are arranged at intervals, and the plurality of liquid channels 211 are connected to each other. The reinforcing beam also includes a first blocking block 230 and a second blocking block 240, which are fixedly assembled at both ends of the third vertical plate 210. The first blocking block 230 and the second blocking block 240 are used to block the liquid channel 211. A water inlet 212 and a water outlet 213 are provided on the first blocking block 230. In another specific embodiment, the water inlet 212 and the water outlet 213 can be respectively located on the first blocking block 230 and the second blocking block 240. The water inlet 212 and the water outlet 213 are both connected to the liquid channel 211, and the external coolant flows into the liquid channel 211 from the water inlet 212 and flows out from the water outlet 213 to achieve the cooling function.

[0042] The transverse plate also includes a second transverse plate 220, which is in the shape of a rectangular parallelepiped and is horizontally arranged. The third vertical plate 210 is perpendicular to the middle of the upper surface of the second transverse plate 220 and the third vertical plate 210 and the second transverse plate 220 are fixedly connected, so that the third vertical plate 210 and the second transverse plate 220 are T-shaped.

[0043] In summary, the third vertical plate 210 , the second transverse plate 220 , the first blocking block 230 , and the second blocking block 240 constitute the T-shaped liquid-cooling reinforcement beam 200 .

[0044] like Figure 5 As shown, a plurality of cavities 300 are provided on the transverse plate, and the transverse plate is fixed to the bottom plate 410 by a friction stir welding process.

[0045] In a specific embodiment, the first transverse plate 130 and the second transverse plate 220 are both provided with a plurality of cavities 300, which penetrate the first transverse plate 130 and the second transverse plate 220, so as to reduce the weight of the first transverse plate 130 and the second transverse plate 220, reduce heat conduction, and enhance the thermal insulation effect.

[0046] like Figure 1 As shown, the present application also provides a battery box 400, which includes a base plate 410. A plurality of T-shaped exhaust reinforcement beams 100 and a plurality of T-shaped liquid cooling reinforcement beams 200 are provided in the battery box 400. The T-shaped exhaust reinforcement beams 100 and the T-shaped liquid cooling reinforcement beams 200 are arranged at intervals, and the T-shaped exhaust reinforcement beams 100 and the T-shaped liquid cooling reinforcement beams 200 are arranged alternately. The first transverse plate 130 in the T-shaped exhaust reinforcement beam 100 and the second transverse plate 220 in the T-shaped liquid cooling reinforcement beam 200 are both fixedly assembled on the base plate 410 by a stir friction welding process.

[0047] In another specific embodiment, only the T-shaped exhaust reinforcement beam 100 or the T-shaped liquid cooling reinforcement beam 200 is provided in the battery box 400 to adapt to different types of battery PACK solutions.

[0048] The present application also provides a battery pack, which includes the above-mentioned battery box 400.

[0049] To sum up, the present application uses a reinforcing beam with a T-shaped structure to replace the traditional square reinforcing beam, which increases the contact area between the reinforcing beam and the battery box, so as to facilitate the use of a stir friction welding process to fix the reinforcing beam to the bottom plate 410 of the battery box 400. Compared with the traditional square reinforcing beam using a fillet welding process or a bolt assembly process, the stir friction welding process can reduce the use of tooling during the welding process. At the same time, during the stir friction welding process, the position tolerance, flatness and other accuracies of the reinforcing beam can be better controlled, and due to the T-shaped structure of the reinforcing beam, the verticality of the reinforcing beam can be effectively guaranteed after the reinforcing beam is fixed to the battery box 400.

[0050] In addition, a symmetrical first exhaust port 111 and a second exhaust port 121 are provided on the T-shaped exhaust reinforcement beam 100, and a cross-shaped air blocking portion 140 is provided between the first exhaust port 111 and the second exhaust port 121 to buffer the gas between the first exhaust port 111 and the second exhaust port 121, effectively preventing the high-temperature gas generated by the thermal runaway of the battery cell from triggering the thermal runaway of the adjacent battery cell, and at the same time eliminating the exhaust resistance caused by the thermal runaway of the two opposite battery cells. Since the traditional reinforcement beam adopts the staggered arrangement of the first exhaust port 111 and the second exhaust port 121 to buffer the gas passing through the reinforcement beam, the first liquid cooling plate 1 The third exhaust port 151 on 50 needs to be set into two types to match the first exhaust port 111 and the second exhaust port 121 that are staggered, which increases the complexity of the structure of the first liquid cooling plate. The first exhaust port 111 and the second exhaust port 121 in the present application are symmetrically arranged, and an air blocking portion 140 is provided to buffer the gas, so that the third exhaust port on the first liquid cooling plate 150 only needs to be set into one type, which reduces the structural complexity of the first liquid cooling plate 150. In addition, the symmetrically arranged first exhaust port 111 and the second exhaust port 121 are convenient for processing and can effectively reduce production costs.

[0051] The above description is only a preferred embodiment of the present application and does not limit the patent scope of the present application. Any equivalent structure or equivalent process transformation made using the contents of the present application specification and drawings, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present application.

Claims

1. A reinforcing beam, applied to a battery box, characterized in that: include: horizontal and vertical boards; The transverse plates and the vertical plates are vertically connected to each other, and the transverse plates and the vertical plates are arranged in a T-shape.

2. The reinforcing beam according to claim 1, wherein: The vertical plate includes a first vertical plate and a second vertical plate, the first vertical plate and the second vertical plate are spaced apart from each other, and an air duct is formed between the first vertical plate and the second vertical plate, the first vertical plate is provided with a plurality of first exhaust ports, and the second vertical plate is provided with a plurality of second exhaust ports, and the first exhaust ports and the second exhaust ports are both connected to the air duct.

3. The reinforcing beam according to claim 2, characterized in that The air passage is provided with a plurality of air blocking portions, and the air blocking portions are correspondingly provided between the first exhaust port and the second exhaust port, and are used to prevent gas from forming a cross-spray between the first exhaust port and the second exhaust port.

4. The reinforcing beam according to claim 3, characterized in that The air baffle portion includes a first air baffle plate and a second air baffle plate, the first air baffle plate is fixedly connected to the first vertical plate and / or the second vertical plate, and the first air baffle plate and the second air baffle plate are vertically connected to each other.

5. The reinforcing beam according to claim 2, characterized in that The reinforcing beam also includes a first liquid cooling plate, and the first liquid cooling plate is fixedly installed on the first vertical plate and / or the second vertical plate. The first liquid cooling plate is provided with a plurality of third exhaust ports, and the third exhaust ports correspond to the first exhaust ports and / or the second exhaust ports.

6. The reinforcing beam according to claim 1, characterized in that The vertical plate further includes a third vertical plate, a liquid channel is provided in the third vertical plate, and a water inlet and a water outlet connected to the liquid channel are also provided on the third vertical plate.

7. The reinforcing beam according to claim 1, characterized in that The transverse plate is provided with a plurality of cavities.

8. A battery box comprising the reinforcing beam according to any one of claims 1 to 7.

9. The battery box according to claim 8, characterized in that: The battery box includes a bottom plate, and the transverse plate is fixed to the bottom plate by a stir friction welding process.

10. The battery box according to claim 9, characterized in that: The structure composed of the first vertical plates and the second vertical plates is alternately arranged in parallel with the third vertical plates.

11. A battery pack, characterized in that: The invention comprises a battery box according to any one of claims 8 to 10.

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