High-safety liquid cooling plate

Abstract

The utility model relates to the field of liquid cooling plates, and discloses a high-safety liquid cooling plate, which is mounted in a box body of a battery pack, comprises a liquid cooling plate coated with insulating paint, and is characterized in that a bracket is mounted on the liquid cooling plate, the bracket comprises a first connecting piece and a second connecting piece, the first connecting piece is fixedly connected with the second connecting piece, the first connecting piece is connected with the box body, and the second connecting piece is connected with the box body. The first connecting piece is fixedly connected with the liquid cooling plate, the second connecting piece is fixedly connected with the liquid cooling plate, the surface of the first connecting piece is exposed, and the exposed surface of the second connecting piece is coated with insulating paint. The first connecting piece is electrically connected with the box body, the first connecting piece, the bracket and the box body are relatively conducted, and the bracket is relatively conducted with the liquid cooling plate, so that the contact resistance can be reduced; therefore, the potential difference among the box body, the bracket and the liquid cooling plate can be effectively reduced, so that the same potential is kept among conductive parts of the box body, the bracket and the liquid cooling plate, and the electric leakage risk and other potential safety hazards can be reduced even if the electric core leaks electricity.

Description

Technical Field

[0001] The present application relates to the field of battery pack liquid cooling plates, and in particular to a high-safety liquid cooling plate. Background Art

[0002] New energy vehicles are the future direction of the automotive industry. The battery pack is a core component of these vehicles, providing power and achieving environmental protection, energy conservation, and improved energy efficiency. As the core and irreplaceable component of new energy vehicles, the battery pack's R&D investment will not be reduced. The water cooling system, a crucial component of the battery pack's thermal management system, requires complex manufacturing processes and high precision.

[0003] However, in actual use, battery packs may have design flaws in their internal electrical connections, conductivity, and thermal management, which can affect the pack's equipotential performance. The battery pack's operating environment (such as temperature, humidity, and vibration) also affects its performance. Harsh operating conditions can degrade the pack's electrical performance, thereby affecting its equipotential performance. Furthermore, as the battery pack ages, the cells themselves may age, leading to performance degradation, which also affects the pack's equipotential performance. Poor equipotential performance can easily lead to safety hazards such as leakage. Utility Model Content

[0004] In order to solve the potential safety hazards caused by poor electrical performance of battery packs, a high-safety liquid cooling plate is provided.

[0005] The above-mentioned application objectives of this application are achieved through the following technical solutions:

[0006] A high-safety liquid cooling plate is installed in a battery pack box, including a liquid cooling plate coated with insulating paint. It is characterized in that a bracket is installed on the liquid cooling plate, and the bracket includes a first connecting member and a second connecting member. The first connecting member is fixedly connected to the second connecting member, the first connecting member is connected to the box, and the second connecting member is fixedly connected to the liquid cooling plate. The surface of the first connecting member is exposed, and the exposed surface of the second connecting member is coated with insulating paint.

[0007] By adopting the above technical solution, due to the poor equipotential performance of the battery pack, the charge generated by the chemical reaction between the positive and negative electrodes will form a potential difference between the two poles. When the battery management system fails to effectively monitor and adjust the status of each battery cell, it will cause the voltage of some battery cells to be too high or too low, thereby forming a potential difference within the battery pack. This potential difference is transmitted through the electrolyte inside the battery and the connecting wires between the batteries. Certain parts of the liquid cooling plate and the casing are in poor contact with the battery pack shell or other conductive parts, causing current to flow through these contact points to the liquid cooling plate and the casing, thereby forming a potential difference between the casing and the liquid cooling plate.

[0008] In this application, the first connecting member is electrically contacted with the box, and the first connecting member, the bracket and the box are relatively conductive, and the bracket itself and the liquid cooling plate are relatively conductive, which can reduce the contact resistance. This can effectively reduce the potential difference between the box, the bracket and the liquid cooling plate, so that the conductive parts of the box, the bracket and the liquid cooling plate maintain the same potential. Even if the battery cell leaks, the leakage risk and other safety hazards can be reduced.

[0009] Optionally, the number of the second connecting members is two, and one end of the two second connecting members is fixedly connected to the first connecting member.

[0010] By adopting the above technical solution, the two second connecting members help to disperse stress, avoid excessive stress concentration at a single connection point, which affects the durability and reliability of the entire system, and improve the stability of the bracket.

[0011] Optionally, the fixed connection between the first connecting member and the second connecting member is transitionally smooth.

[0012] By adopting the above technical solution, the connection is smooth in transition, avoiding the skin effect and tip discharge of electric field charges.

[0013] Optionally, the second connecting member includes a first fastening segment and a second fastening segment, the two first fastening segments are respectively fixedly connected to both sides of the first connecting member, and the two first fastening segments and the second fastening segments enclose a wiring harness space through which the power supply line passes.

[0014] By adopting the above technical solution, the two first fastening sections and the second fastening section enclose a wiring harness space through which the power supply line passes, thereby constraining the wires in the battery pack, facilitating the arrangement and fixation of the wires, and effectively improving the neatness and aesthetics of the battery pack.

[0015] Optionally, the corners of the second fastening section are rounded.

[0016] By adopting the above technical solution and the rounded corner design, the risk of injury to operators during installation or maintenance is reduced. At the same time, the rounded corner design avoids the skin effect and tip discharge of electric field charges.

[0017] Optionally, the first connecting member is connected to the box body via a metal bolt, and the first connecting member includes a connecting hole for threaded connection of the metal bolt.

[0018] By adopting the above technical solution, the threaded connection increases the connection between the first connecting member and the box body, and is easy to disassemble, which facilitates future maintenance and replacement of parts.

[0019] Optionally, the first connecting member further includes a rivet nut, the connecting hole is located in the rivet nut, and a through-hole is formed on the first connecting member, and the rivet nut is inserted into and fixed in the through-hole.

[0020] By adopting the above technical solution and selecting a rivet nut, the rivet nut not only fixes the threaded connection with the box body, but also drives the first connecting member toward the box body, so that the first connecting member and the box body are in full contact, and the potential conduction effect is better.

[0021] Optionally, the number of the perforations is two, and the perforations are evenly distributed on the first connecting member, and the number of the perforations is equal to the number of the rivet nuts.

[0022] By adopting the above technical solution, the two perforations are evenly distributed on the first connecting member, the stress is dispersed more evenly, and the bracket is less likely to deform; at the same time, the vibration of the liquid cooling plate during operation can be reduced, preventing displacement or damage caused by the vibration of the liquid cooling plate.

[0023] In summary, this application has at least the following beneficial effects:

[0024] 1. The first connector is in direct contact with the housing. Through the first connector, the bracket and the housing are relatively conductive, and the bracket itself is relatively conductive with the liquid cooling plate. This can effectively reduce the potential difference between the housing, bracket, and liquid cooling plate. Even if the battery cell leaks, the risk of leakage and other safety hazards can be reduced.

[0025] 2. The first fastening section and the second fastening section are fixedly connected. The first connector, the first fastening section and the second fastening section form a wiring harness space to constrain the wires, making it easier to organize and fix the wires, and effectively improving the neatness and aesthetics of the wiring harness in the battery pack. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 This is a structural diagram of a high-safety liquid cooling plate;

[0027] Figure 2 for Figure 1 A local enlarged view at point A;

[0028] Figure 3 Schematic diagram of the structure of the bracket.

[0029] Figure numerals: 1, box body; 2, liquid cooling plate; 3, bracket; 31, first connecting piece; 311, through hole; 312, rivet nut; 3121, connecting hole; 32, second connecting piece; 321, first fastening section; 322, second fastening section. DETAILED DESCRIPTION

[0030] The following is a further detailed description with reference to the accompanying drawings:

[0031] As attached Figure 1 As shown, a high-safety liquid cooling plate is installed in a box 1 of a battery pack, which includes a liquid cooling plate 2 and a bracket 3.

[0032] The liquid cooling plate 2 is plate-shaped, with insulating paint applied to the outer surface and a cooling channel on one side for the coolant to flow. The layout of the cooling channel is determined by the actual heat dissipation requirements of the battery pack.

[0033] As attached Figure 1 and attached Figure 2 As shown, the bracket 3 is installed on the side of the liquid cooling plate 2 without the cooling channel. The bracket 3 is located between the liquid cooling plate 2 and the housing 1. The bracket 3 includes a first connecting member 31 and two second connecting members 32. The first connecting member 31 is in the shape of an elongated strip, and the two second connecting members 32 are respectively connected to the two sides of the first connecting member 31.

[0034] As attached Figure 2 and attached Figure 3 As shown, the second connecting member 32 also includes a first fastening section 321 and a second fastening section 322. The first fastening section 321 is perpendicular to the second fastening section 322. The first fastening section 321 is fixedly connected to the first connecting member 31 on one end away from the liquid cooling plate 2, and the first fastening section 321 is fixedly connected to the second fastening section 322 on one end close to the liquid cooling plate 2. Smooth transitions are provided at both connections to avoid skin effect and tip discharge of electric field charges.

[0035] The second fastening section 322 is fixedly connected to the surface of the liquid cooling plate 2, and the two first fastening sections 321 are respectively fixedly connected to the two sides of the first connecting member 31. The first connecting member 31, the first fastening section 321 and the second fastening section 322 form a wiring harness space. The power lines pass through the wiring harness space to constrain the wires in the battery pack, making it easier to organize and fix the wires. At the same time, the corners of the second fastening section 322 are set to be rounded, which reduces the risk of injury to operators during installation or maintenance, and avoids the skin effect and tip discharge of electric field charges.

[0036] As attached Figure 1 and attached Figure 3 As shown, two through holes 311 are formed on the first connecting member 31, and the first connecting member 31 also includes a rivet nut 312. The number of the through holes 311 is equal to the number of the rivet nuts 312. One end of the rivet nut 312 is inserted into the through hole 311, and the rivet nut 312 is tightened and fixed on the first connecting member 31.

[0037] The rivet nut 312 is connected to the box body 1 through a metal bolt. The first connecting member 31 also includes a connecting hole 3121 for threaded connection of the metal bolt. The connecting hole 3121 is located in the rivet nut 312. While the rivet nut 312 is connected and fixed to the box body 1 through the metal bolt, it also drives the first connecting member 31 toward the box body 1, so that the contact effect between the first connecting member 31 and the box body 1 is better, the potential conduction effect is better, and at the same time, the risk of displacement of the liquid cooling plate 2 due to vibration during operation of the liquid cooling plate 2 is reduced.

[0038] The surface of the first connecting member 31 is exposed, and the exposed surface of the second connecting member 32 is coated with insulating paint. The exposed surface of the first connecting member 31 is electrically connected to the box body 1. The first connecting member 31, the bracket 3 and the box body 1 are relatively conductive, and the bracket 3 itself and the liquid cooling plate 2 are relatively conductive, which can reduce the contact resistance. This can effectively reduce the potential difference between the box body 1, the bracket 3 and the liquid cooling plate 2, so that the conductive parts of the box body 1, the bracket 3 and the liquid cooling plate 2 maintain the same potential. Even if the battery cell leaks, the leakage risk and other safety hazards can be reduced.

[0039] The advantages of this embodiment are: Bracket 3 acts as a potential equalizer between the liquid cooling plate 2 and the housing 1, ensuring relative electrical continuity between the two. This effectively reduces the potential difference between the housing 1 and the liquid cooling plate 2, thereby lowering the risk of electrical leakage and other safety hazards. Furthermore, a wiring harness space is formed between bracket 3 and the liquid cooling plate 2, organizing and securing the wires within the battery pack, effectively improving the neatness and aesthetics of the wiring harness within the battery pack.

[0040] This specific embodiment is merely an explanation of the present application and is not a limitation of the present application. After reading this specification, those skilled in the art may make non-creative modifications to the present embodiment as needed, but as long as they are within the scope of protection required by this application, they are protected by patent law.

Claims

1. A high-safety liquid cooling plate, installed in a box (1) of a battery pack, comprising a liquid cooling plate (2) coated with insulating paint, characterized in that: A bracket (3) is mounted on the liquid cooling plate. The bracket (3) includes a first connecting member (31) and a second connecting member (32). The first connecting member (31) is fixedly connected to the second connecting member (32). The first connecting member (31) is connected to the box (1), and the second connecting member (32) is fixedly connected to the liquid cooling plate (2). The surface of the first connecting member (31) is exposed to the outside, and the exposed surface of the second connecting member (32) is coated with insulating paint.

2. A high-safety liquid cooling plate according to claim 1, characterized in that: There are two second connecting members (32), and one end of each of the two second connecting members (32) is fixedly connected to the first connecting member (31).

3. The high-safety liquid cooling plate according to claim 2, characterized in that: The fixed connection between the first connecting member (31) and the second connecting member (32) is transitionally smooth.

4. The high-safety liquid cooling plate according to claim 2, characterized in that: The second connecting member (32) comprises a first fastening section (321) and a second fastening section (322), the two first fastening sections (321) being fixedly connected to two sides of the first connecting member (31), respectively, and the two first fastening sections (321) and the second fastening sections (322) forming a wiring harness space through which the power supply line passes.

5. The high-safety liquid cooling plate according to claim 4, characterized in that: The corners of the second fastening section (322) are rounded.

6. The high-safety liquid cooling plate according to claim 1, characterized in that: The first connecting member (31) is connected to the box body (1) via a metal bolt member, and the first connecting member (31) comprises a connecting hole (3121) for threaded connection of the metal bolt member.

7. The high-safety liquid cooling plate according to claim 6, characterized in that: The first connecting member (31) further comprises a rivet nut (312), the connecting hole (3121) is located in the rivet nut (312), a through hole (311) is formed on the first connecting member (31), and the rivet nut (312) is inserted into and fixed in the through hole (311).

8. The high-safety liquid cooling plate according to claim 7, characterized in that: The number of the through holes (311) is two, and the through holes (311) are evenly spaced and distributed on the first connecting member (31), and the number of the through holes (311) is equal to the number of the rivet nuts (312).

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