Liquid-cooled battery pack

Abstract

The utility model discloses a kind of liquid-cooled battery packs, comprising: liquid-cooled bottom plate includes N-1 liquid-cooled pipe plate parts and N link plate parts, liquid-cooled pipe plate part and link plate part are alternately arranged along transverse direction, several crossbeam parts are connected to the lower plate surface of liquid-cooled bottom plate, the lower plate surface of N link plate parts is sequentially formed with the abutment of crossbeam part, two longitudinal beam parts are equipped between adjacent crossbeam parts, and two longitudinal beam parts are arranged in the lower plate surface of first link plate part and last link plate part respectively;The end surface of crossbeam part is flush with the end surface of link plate part.The liquid-cooled battery pack presented in the application, by dividing the liquid-cooled bottom plate into multiple liquid-cooled pipe plate parts and multiple link plate parts, the lower plate surface of liquid-cooled bottom plate is formed into a loop-shaped support by the crossbeam part at both ends and multiple longitudinal beam parts, and multiple crossbeam parts in the middle interval of the lower plate surface of liquid-cooled bottom plate form multiple-point support, ensuring the stability and balance of the crossbeam part, longitudinal beam part supporting operation for liquid-cooled battery pack.

Description

Technical Field

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

[0002] As a core component for energy storage and power supply, battery packs are widely used in electric vehicles, energy storage systems, and other fields. In the design and application of battery packs, liquid cooling technology is widely used to effectively address heat dissipation issues. Liquid-cooled battery packs cool the battery through liquid cooling pipelines, significantly improving heat dissipation efficiency and thus enhancing battery performance and safety.

[0003] However, existing liquid-cooled battery packs typically consist of a battery housing and a liquid-cooled base plate. The base plate houses the liquid-cooling piping for cooling the batteries. However, during transportation, installation, or use, the lower surface of the base plate usually comes into direct contact with the load-bearing surface of the transport equipment. This direct contact can cause wear, scratches, or other physical damage to the lower surface of the base plate, affecting the normal operation of the liquid-cooling piping and potentially adversely impacting the overall performance and safety of the battery pack.

[0004] In addition, during the installation of the battery pack, in order to ensure the structural stability of the battery pack, a weighing beam is usually used to support both ends of the lower surface of the battery pack. This directly affects the comprehensiveness of the load-bearing surface in supporting the battery pack, and affects the overall structural stability and service life. Utility Model Content

[0005] The purpose of this invention is to address the shortcomings of existing technologies by proposing a liquid-cooled battery pack.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] A liquid-cooled battery pack includes: a liquid-cooled base plate comprising N-1 liquid-cooled tube sheet portions and N connecting plate portions, wherein the liquid-cooled tube sheet portions and connecting plate portions are arranged alternately in the transverse direction;

[0008] The lower surface of the liquid-cooled base plate is connected to several crossbeams, which abut against the lower surfaces of N connecting plates in sequence. Two longitudinal beams are provided between adjacent crossbeams, and the two longitudinal beams are respectively arranged on the lower surfaces of the first and last connecting plates.

[0009] The end face of the crossbeam is flush with the end face of the connecting plate.

[0010] Preferably, the crossbeam component includes a crossbeam body, and the crossbeam body has N inner protrusions on one or both sides in the transverse direction. The inner protrusions abut against the lower plate surface of the connecting plate, and an outer protrusion is formed between adjacent inner protrusions to cover the liquid cooling tube plate.

[0011] The crossbeam body is provided with one or more convex strips extending laterally;

[0012] Both ends of the crossbeam body are provided with connecting protrusions, and the two protrusions respectively correspond to the lower plate surfaces of the first connecting plate and the last connecting plate to form abutments.

[0013] Preferably, the number of crossbeams is 2M+1, and the first crossbeam and the M+1 crossbeam are each provided with one or more convex reinforcing strips extending laterally.

[0014] Preferably, the crossbeam body of the M+1th crossbeam member is provided with N-2 first bolt portions, the first bolt portions are coaxially arranged with the inner protruding strip portion and abut against the connecting plate portion;

[0015] The first crossbeam has N-1 second bolt parts on its body, and the first bolt parts and the second bolt parts are staggered in the transverse direction.

[0016] Preferably, the longitudinal beam component includes a longitudinal beam body and a longitudinal beam end plate. One side of the longitudinal beam body is connected to a connecting plate, and the other side of the longitudinal beam body is detachably connected to the longitudinal beam end plate.

[0017] Preferably, both ends of the longitudinal beam body and the longitudinal beam end plate adopt curved surface transition.

[0018] Compared with the prior art, the beneficial effects of this utility model are:

[0019] The liquid-cooled battery pack proposed in this application divides the liquid-cooled base plate into multiple liquid-cooled tube sheet sections and multiple connecting plate sections. The liquid-cooled tube sheet sections have built-in liquid-cooled pipes for cooling the batteries inside the housing cavity. The connecting plate sections are used to install crossbeams and longitudinal beams. The crossbeams at both ends and the multiple longitudinal beams form a U-shaped support for the lower surface of the liquid-cooled base plate, and the multiple crossbeams in the middle section of the lower surface of the liquid-cooled base plate form multi-point support. This avoids direct contact between the load-bearing surface of the transport and installation equipment and the lower surface of the liquid-cooled base plate, while ensuring the stability and balance of the support operation of the crossbeams and longitudinal beams for the liquid-cooled battery pack. Attached Figure Description

[0020] To illustrate the technical solutions in the embodiments of this utility model or the prior art more specifically and intuitively, the accompanying drawings used in the description of the embodiments or the prior art will be briefly introduced below.

[0021] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0022] Figure 2 This is a schematic diagram of the upward-view structure proposed in this utility model;

[0023] Figure 3 A structural schematic diagram of the crossbeam component is provided for this utility model. Figure 1 ;

[0024] Figure 4 A structural schematic diagram of the crossbeam component is provided for this utility model. Figure 2 ;

[0025] Figure 5 This is an enlarged schematic diagram of structure A proposed in this utility model;

[0026] Figure 6 This is a partial side view schematic diagram of the present invention.

[0027] In the figure: battery box 100, liquid cooling base plate 200, liquid cooling tube plate 201, connecting plate 202, crossbeam 300, crossbeam body 301, inner protrusion 302, outer protrusion 303, inner protrusion strip 304, protrusion 305, inner protrusion reinforcing strip 306, first bolt 307, second bolt 308, longitudinal beam 400, longitudinal beam body 401, longitudinal beam end plate 402. Detailed Implementation

[0028] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0029] Reference Figures 1 to 6 A liquid-cooled battery pack includes: a battery housing 100 and a liquid-cooled base plate 200. The battery housing 100 and the liquid-cooled base plate 200 are assembled to form a storage cavity for storing batteries. The liquid-cooled base plate 200 includes N-1 liquid-cooled tube sheet portions 201 and N connecting plate portions 202. The liquid-cooled tube sheet portions 201 and the connecting plate portions 202 are arranged alternately in the transverse direction.

[0030] The liquid-cooled base plate 200 is connected to a number of crossbeams 300 on its lower plate surface. The crossbeams 300 abut against the lower plate surfaces of N connecting plate portions 202 in sequence. Two longitudinal beams 400 are provided between adjacent crossbeams 300. The two longitudinal beams 400 are respectively arranged on the lower plate surfaces of the first connecting plate portion 202 and the last connecting plate portion 202.

[0031] The end face of the crossbeam 300 is flush with the end face of the connecting plate 202.

[0032] For example, the liquid-cooled base plate 200 includes four liquid-cooled tube sheet portions 201 and five connecting plate portions 202. The crossbeams 300 abut against the lower surfaces of the five connecting plate portions 202 in sequence. The lower surface of the liquid-cooled base plate 200 is connected to the five crossbeams 300. Two longitudinal beams 400 are provided between adjacent crossbeams 300. A total of eight longitudinal beams 400 are connected to the lower surface of the liquid-cooled base plate 200.

[0033] The liquid-cooled battery pack proposed in this application divides the liquid-cooled base plate 200 into multiple liquid-cooled tube sheet sections 201 and multiple connecting plate sections 202. The liquid-cooled tube sheet sections 201 have built-in liquid-cooled pipes for cooling the batteries in the storage cavity. The connecting plate sections 202 are used to install crossbeams 300 and longitudinal beams 400. The crossbeams 300 at both ends and the multiple longitudinal beams 400 form a U-shaped support for the lower surface of the liquid-cooled base plate 200. The multiple crossbeams 300 in the middle section of the lower surface of the liquid-cooled base plate 200 form multi-point support. This avoids direct contact between the load-bearing surface of the transport and installation equipment and the lower surface of the liquid-cooled base plate 200, while ensuring the stability and balance of the support operation of the crossbeams 300 and longitudinal beams 400 for the liquid-cooled battery pack.

[0034] In this case, the crossbeam component 300 includes a crossbeam body 301. The crossbeam body 301 has N inner protrusions 302 on one or both sides in the lateral direction. The inner protrusions 302 abut against the lower surface of the connecting plate 202. An outer protrusion 303 is formed between adjacent inner protrusions 302 to cover the liquid cooling tube plate 201. Based on the abutment between the protrusions 302 and the lower surface of the connecting plate 202, the outer protrusions 303 cover the cooling tube plate 201, improving the fit between the crossbeam component 300 and the lower surface of the liquid cooling base plate 200, and ensuring the tightness of the connection between the crossbeam component 300 and the liquid cooling base plate 200. At the same time, the difference in structural height between the inner protrusions 302 and the outer protrusions 303 causes the crossbeam component 300 to form several arched structures in the lateral direction on one or both sides, improving the overall rigidity of the crossbeam component 300 in the lateral direction.

[0035] The crossbeam body 301 is provided with one or more convex strips 304 extending laterally. Similarly, the convex strips 304 make the crossbeam 300 form one or more bow-shaped structures in the longitudinal direction, thereby improving the overall rigidity of the crossbeam 300 in the longitudinal direction.

[0036] Both ends of the crossbeam body 301 are provided with connecting protrusions 305. The two protrusions 305 respectively correspond to the lower plate surfaces of the first connecting plate 202 and the last connecting plate 202 to form abutments, thereby realizing the connection between the crossbeam 300 and the liquid-cooled base plate 200.

[0037] In addition, the number of crossbeams 300 is 2M+1, and the first crossbeam 300 and the M+1 crossbeam 300 are each provided with one or more convex reinforcing strips 306 extending laterally.

[0038] For example, if there are 5 crossbeam members 300, then the first crossbeam member 300 and the third crossbeam member 300 are both provided with inwardly protruding reinforcing strips 306, which increases the number of bow-shaped structures in the longitudinal direction and the overall rigidity of the first crossbeam member 300 and the third crossbeam member 300.

[0039] Meanwhile, the beam body 301 of the M+1th crossbeam member 300 is provided with N-2 first bolt portions 307, the first bolt portions 307 and the inner protruding strip portion 304 are arranged coaxially and abut against the connecting plate portion 202;

[0040] The first crossbeam member 300 has N-1 second bolt portions 308 on its crossbeam body 301, and the first bolt portion 307 and the second bolt portion 308 are staggered in the transverse direction.

[0041] exist Figure 2 In the example shown, the beam body 301 of the third beam member 300 is provided with three first bolt portions 307, and the three first bolt portions 307 respectively correspond to the three connecting plate portions 202 to form a joint.

[0042] The first crossbeam 300 has four second bolt portions 308 on its body 301. The first bolt portion 307 and the four second bolt portions 308 are staggered in the transverse direction. This increases the firmness of the connection between the first crossbeam 300, the third crossbeam 300 and the liquid-cooled base plate 200. The staggered first bolt portion 307 and second bolt portion 308 also cause the connection positions of the first crossbeam 300 and the third crossbeam 300 to be misaligned. This prevents the first crossbeam 300 and the third crossbeam 300 from being damaged by the same external force, thereby improving the overall strength of the crossbeams 300.

[0043] In this case, the longitudinal beam component 400 includes a longitudinal beam body portion 401 and a longitudinal beam end plate portion 402. The longitudinal beam body portion 401 is connected to a connecting plate portion 202 on one side, and the longitudinal beam body portion 401 is detachably connected to the longitudinal beam end plate portion 402 on the other side. For example, the longitudinal beam end plate portion 402 is installed on the longitudinal beam body portion 401 by bolts, which facilitates the disassembly and installation of the corresponding longitudinal beam end plate portion 402.

[0044] Meanwhile, both ends of the longitudinal beam body 401 and the longitudinal beam end plate 402 adopt curved transitions to facilitate the overall movement of the liquid-cooled battery pack along the longitudinal direction, which is convenient for the subsequent transportation and stacking of the liquid-cooled battery pack.

[0045] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A liquid-cooled battery pack, comprising: A battery housing (100) and a liquid-cooled base plate (200) are assembled to form a storage cavity for storing batteries. The liquid-cooled base plate (200) includes N-1 liquid-cooled tube sheet sections (201) and N connecting plate sections (202), which are arranged alternately in the transverse direction. The lower surface of the liquid-cooled base plate (200) is connected to several crossbeams (300), and the crossbeams (300) abut against the lower surfaces of N connecting plate parts (202) in sequence. Two longitudinal beams (400) are provided between adjacent crossbeams (300), and the two longitudinal beams (400) are respectively arranged on the lower surfaces of the first connecting plate part (202) and the last connecting plate part (202). The end face of the crossbeam (300) is flush with the end face of the connecting plate (202).

2. The liquid-cooled battery pack according to claim 1, characterized in that, The crossbeam component (300) includes a crossbeam body (301), and the crossbeam body (301) has N inner protrusions (302) on one or both sides. The inner protrusions (302) abut against the lower plate surface of the connecting plate (202), and an outer protrusion (303) for covering the liquid cooling tube sheet (201) is formed between adjacent inner protrusions (302). The beam body (301) is provided with one or more transversely extending inner convex strips (304). Both ends of the crossbeam body (301) are provided with connecting protrusions (305), and the two protrusions (305) respectively correspond to the lower plate surface of the first connecting plate (202) and the last connecting plate (202) to form abutments.

3. A liquid-cooled battery pack according to claim 2, characterized in that, The number of the crossbeams (300) is 2M+1, and the first crossbeam (300) and the M+1 crossbeam (300) are each provided with one or more convex reinforcing strips (306) extending laterally.

4. A liquid-cooled battery pack according to claim 3, characterized in that, The beam body (301) of the M+1th crossbeam member (300) is provided with N-2 first bolt portions (307), the first bolt portions (307) and the inner protruding strip portion (304) are arranged coaxially and abut against the connecting plate portion (202); The first crossbeam member (300) has a crossbeam body (301) with N-1 second bolt portions (308), and the first bolt portion (307) and the second bolt portion (308) are staggered in the transverse direction.

5. A liquid-cooled battery pack according to any one of claims 1-4, characterized in that, The longitudinal beam component (400) includes a longitudinal beam body part (401) and a longitudinal beam end plate part (402). The longitudinal beam body part (401) is connected to a connecting plate part (202) on one side, and the longitudinal beam body part (401) is detachably connected to the longitudinal beam end plate part (402) on the other side.

6. A liquid-cooled battery pack according to claim 5, characterized in that, Both ends of the longitudinal beam body (401) and the longitudinal beam end plate (402) adopt curved surface transition.

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