Flexible circuit board assembly structure and immersed battery with same

Abstract

The utility model provides a flexible circuit board assembly structure, which is suitable for auxiliary installation of a flexible circuit board in an immersed battery, and comprises a sealing element which is matched and kept below a board body so as to seal the flexible circuit board when the flexible circuit board passes through the board body from the lower part of the board body. And the sealing between the flexible circuit board and the board body is formed. According to the utility model, the sealing performance of the flexible circuit board in the immersed battery during installation is improved, so that the use stability of the battery pack is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of immersed batteries, in particular to a flexible circuit board assembly structure and an immersed battery having the same. Background Art

[0002] With the rise of revolutionary changes in the contemporary automobile industry, major automobile manufacturers have shifted their focus to new energy vehicles. Pure electric vehicles, as new energy vehicles, are increasingly favored by all sectors of society. In new energy electric vehicles, the battery pack is a key component that determines the endurance and safety of electric vehicles, and is a key constraint for electric vehicles to gain market recognition and customer trust.

[0003] In order to extend the service life of the battery pack as much as possible and obtain maximum power, the battery pack needs to be used within the specified temperature range; and there will be heat problems during the charging and discharging process of the battery pack, which is mainly caused by the chemical reaction and current flow inside the battery pack.

[0004] In the related technology, there are two main types of heat dissipation for traditional battery packs: air cooling and liquid cooling. Among them, air cooling mainly uses air conditioning for cooling, and the cooling medium is air, which has low energy efficiency and poor temperature consistency of the battery pack. Liquid cooling uses a cooling plate with water as the cooling medium. The heat is exchanged between the cooling medium circulating in the cooling plate and the battery pack. The heat needs to pass through the battery casing and the cooling plate and finally be transferred to the cooling medium. The heat is then dissipated by the cooling medium through the radiator. There are many heat transfer links, large thermal resistance, low heat exchange efficiency, and high requirements for radiator performance. In order to meet the design requirements of thermal management under high-rate charge and discharge conditions, immersed battery packs are often used to achieve uniform heat dissipation of battery modules. However, there is a risk of leakage when the flexible circuit board used to monitor the battery pack power and temperature passes through the module that needs to be sealed. Utility Model Content

[0005] In view of this, the utility model aims to propose a flexible circuit board assembly structure to improve the sealing performance of the flexible circuit board during installation in an immersed battery, so as to improve the stability of the battery pack during use.

[0006] In order to achieve the above object, the technical solution of the utility model is implemented as follows:

[0007] A flexible circuit board assembly structure is suitable for auxiliary installation of a flexible circuit board in an immersed battery, and the assembly structure comprises:

[0008] The sealing member is matched with and held under a plate body to form a seal between the flexible circuit board and the plate body when the flexible circuit board passes through the plate body from under the plate body.

[0009] Furthermore, the sealing element comprises:

[0010] A head, engaged with the lower surface of the plate body;

[0011] An extension portion is formed integrally with the head portion and extends downward from the head portion;

[0012] The flexible circuit board is arranged to pass through the extension part and the head part in sequence from the bottom of the extension part.

[0013] Furthermore, a concave engaging groove is formed on the upper surface of the head facing the plate body, and engaging teeth embedded in the engaging groove are provided on the lower surface of the plate body.

[0014] Furthermore, the extension length of the extension portion is greater than the thickness of the head portion.

[0015] Furthermore, the sealing element is made of elastic material.

[0016] Furthermore, the board body is a circuit board held above the battery module.

[0017] Furthermore, a retaining portion is provided on the outer sheath of the sealing member and is fixedly retained below the plate body.

[0018] Furthermore, the holding portion includes:

[0019] A main body, wherein a receiving cavity adapted to and accommodating the sealing member is formed in the main body;

[0020] The fitting part is extended outward from the main body to fit against and be fixedly connected to the lower surface of the plate body.

[0021] Furthermore, the bonding portion is adhered to the lower surface of the plate body.

[0022] Compared with the prior art, the utility model has the following advantages:

[0023] The flexible circuit board assembly structure described in the utility model improves the sealing performance of the portion where the flexible circuit board passes through the board body, reduces the possibility of leakage of the cooling medium from that portion, and improves the stability and safety of the immersed battery pack during use by arranging a sealing member between the flexible circuit board and the board body under the board body.

[0024] Secondly, by providing a head that bites into the lower surface of the plate body, compared with sticking to the lower surface of the plate body, the head that bites into the plate body changes the connection between the seal and the plate body from a two-dimensional plane connection to a three-dimensional connection, thereby improving the stability of the connection between the seal and the plate body; by providing an extension portion, the contact area between the flexible circuit board and the seal is increased, and the path distance for the cooling medium to pass through the connection between the seal and the flexible circuit board is increased, thereby reducing the probability of cooling medium leakage from this location and improving the stability of the immersion battery pack.

[0025] In addition, by providing an engaging groove formed on the head and an engaging groove cooperating with the engaging groove, the stability of the connection between the seal and the plate body is improved while the path of the cooling medium flowing from the gap between the seal and the plate body into the passage through the plate body of the flexible circuit board is made rugged, further improving the sealing performance of the connection between the seal and the plate body.

[0026] By setting the length of the extension portion to be greater than the thickness of the head, the convenience of connecting the seal and the plate body is improved, while the stress concentration at the connection between the flexible circuit board and the seal is reduced, and the probability of damage at the connection between the flexible circuit board and the seal is reduced.

[0027] By setting the seal to be made of elastic material, the seal can be easily engaged and connected to the plate body. At the same time, the engagement groove of the seal made of elastic material is squeezed and deformed, which makes it easier for the engagement teeth to be tightly inserted into the engagement groove, thereby improving the connection stability and sealing of the engagement point.

[0028] By wrapping the seal outside and fixing the retaining portion below the plate body, the deformation resistance of the seal made of elastic material is improved, and the seal is prevented from being squeezed and causing bite failure. The setting of the retaining portion improves the sealing stability of the seal.

[0029] By providing a fitting portion extending outward from the main body, the stability of the retaining portion after being fixedly attached to the lower surface of the plate body is improved. When the retaining portion is connected to the plate body by bonding or hot melting, the increased connection area is beneficial to enhancing the stability of the connection between the plate body and the retaining portion.

[0030] Adhesion is used to fix the bonding part to the plate body, which is beneficial to ensure the integrity of the plate body compared with hot melting or metal riveting, and gluing facilitates automatic bonding.

[0031] The utility model also provides an immersion battery, comprising a shell and a battery module accommodated in the shell, wherein the flexible circuit board assembly structure as described above is arranged in the shell.

[0032] The submerged battery of the utility model is equipped with the flexible circuit board assembly structure as described above, thereby reducing the sealing of the connection between the flexible circuit board and the circuit board, and improving the stability and safety of the submerged battery in use. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] The accompanying drawings constituting a part of the present invention are used to provide a further understanding of the present invention. The illustrative embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation on the present invention. In the accompanying drawings:

[0034] Figure 1 It is a schematic diagram of the overall structure of an embodiment of the utility model;

[0035] Figure 2 The embodiment of the utility model is a parts diagram showing a seal;

[0036] Figure 3 The embodiment of the utility model is a parts diagram showing the holding portion;

[0037] Figure 4 The embodiment of the present invention is a cross-sectional view showing the meshing teeth.

[0038] Description of reference numerals: 1. sealing element;

[0039] 101, head; 1011, bite groove; 102, extension part;

[0040] 2. Plate body;

[0041] 201, occlusal teeth;

[0042] 3. Flexible circuit board;

[0043] 4. Maintaining department;

[0044] 401, main body; 4011, accommodating cavity; 402, fitting part. DETAILED DESCRIPTION

[0045] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features in the embodiments can be combined with each other.

[0046] In the description of the present invention, it should be noted that if there are terms such as "upper", "lower", "inner", "outer" and the like indicating orientation or positional relationship, they are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, if there are terms such as "first" and "second", they are also used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0047] In addition, in the description of the present invention, unless otherwise clearly defined, the terms "installation", "connection", "connection" and "connector" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood in combination with specific circumstances.

[0048] The present invention will be described in detail below with reference to the accompanying drawings and in combination with embodiments.

[0049] Embodiment 1

[0050] The present embodiment relates to a flexible circuit board assembly structure to improve the sealing performance of the flexible circuit board 3 during installation in the immersed battery, thereby improving the use stability of the immersed battery pack.

[0051] In terms of overall structure, the flexible circuit board assembly structure is suitable for auxiliary installation of the flexible circuit board 3 in the immersed battery. The assembly structure includes: a seal 1, which is matched and maintained under a plate body 2 to form a seal between the flexible circuit board 3 and the plate body 2 when the flexible circuit board 3 passes through the plate body 2 from under the plate body 2.

[0052] As set above, by setting a seal 1 between the flexible circuit board 3 and the board body 2 under the board body 2, the sealing performance of the flexible circuit board 3 passing through the board body 2 is improved, the possibility of leakage of the cooling medium from this place is reduced, and the stability and safety of the immersed battery pack during use are improved.

[0053] Based on the above overall introduction, the flexible circuit board assembly structure in this embodiment is as follows: Figures 1 to 4 As shown, the cross section of the seal 1 is T-shaped, the flexible circuit board 3 passes through the seal 1 and is fixedly connected to the seal 1, and then the flexible circuit board 3 passes through the plate body 2, and then the seal 1 is connected to the plate body 2, thereby improving the sealing of the connection between the flexible circuit board 3 and the plate body 2; the plate body 2 is a circuit board kept above the battery module. In order to further improve the sealing between the flexible circuit board 3 and the seal 1, and prevent the cooling medium in the immersion battery pack from passing from the gap between the seal 1 and the flexible circuit board 3 to the gap between the flexible circuit board 3 and the plate body 2, the flexible circuit board 3 and the seal 1 are integrally formed.

[0054] In order to improve the stability of the connection between the seal 1 and the plate 2, as Figure 2 and Figure 4 As shown, the seal 1 includes a head 101 and an extension 102, the head 101 is engaged on the lower surface of the plate body 2; the extension 102 and the head 101 are integrally formed and extended downward from the head 101; the flexible circuit board 3 is configured to pass through the extension 102 and the head 101 in sequence from the bottom of the extension 102.

[0055] By setting a head 101 that bites into the lower surface of the plate body 2, compared with being pasted on the lower surface of the plate body 2, the head 101 that bites into the lower surface of the plate body 2 changes the connection between the seal 1 and the plate body 2 from a two-dimensional plane connection to a three-dimensional connection, thereby improving the stability of the connection between the seal 1 and the plate body 2; by setting the extension portion 102, the contact area between the flexible circuit board 3 and the seal 1 is increased, and the path distance of the cooling medium when it wants to pass through the connection between the seal 1 and the flexible circuit board 3 is increased, thereby reducing the probability of cooling medium leakage from this location, and improving the use stability of the immersion battery pack.

[0056] Based on the purpose of improving the connection stability between the seal 1 and the plate body 2, in order to further enhance the sealing between the seal 1 and the plate body 2. On the upper surface of the head 101 facing the plate body 2, a concave bite groove 1011 is formed, and on the lower surface of the plate body 2, a bite tooth 201 embedded in the bite groove 1011 is provided. By setting the bite groove 1011 formed on the head 101 and the bite groove 1011 matched with the bite groove 1011, while improving the connection stability between the seal 1 and the plate body 2, the cooling medium is made to have a rough path when it flows from the gap between the seal 1 and the plate body 2 into the passage of the flexible circuit board 3 penetrating the plate body 2; further improving the sealing of the connection between the seal 1 and the plate body 2.

[0057] In order to facilitate the assembly of the seal 1 and the plate 2, the seal 1 is made of an elastic material. By setting the seal 1 to be made of an elastic material, it is convenient for the seal 1 to be engaged and connected to the plate 2. At the same time, the engagement groove 1011 of the seal 1 made of elastic material is squeezed and deformed, which facilitates the engagement teeth 201 to be tightly inserted into the engagement groove 1011, thereby improving the connection stability and sealing of the engagement. The seal 1 is made of an elastic material, which means that the seal 1 is deformed under the action of an external force, and the deformation is randomly cancelled when the external force is removed, and the seal 1 can completely restore the original deformation state; specifically, the seal 1 is made of a raw material that can have the above elastic material properties, such as natural rubber, synthetic rubber and silicone rubber. In this embodiment, the seal 1 is made of silicone rubber, which has good high-temperature aging resistance and can resist aging when the immersion battery pack generates heat.

[0058] In order to reduce the probability of damage at the connection between the flexible circuit board 3 and the seal 1, the extension length of the extension part 102 is greater than the thickness of the head 101. By setting the length of the extension part 102 to be greater than the thickness of the head 101, the convenience of connecting the seal 1 and the plate body 2 is improved. At the same time, when the flexible circuit board 3 is pulled by external force, the extension part 102 that is longer than the head 101 is easy to deform, thereby reducing the stress concentration at the connection between the flexible circuit board 3 and the seal 1, and reducing the probability of damage at the connection between the flexible circuit board 3 and the seal 1.

[0059] In order to improve the deformation resistance of the seal 1, the outer sheath of the seal 1 has a retaining portion 4 fixedly retained under the plate body 2. By fixing the retaining portion 4 under the plate body 2 by the outer sheath of the seal 1, the deformation resistance of the seal 1 made of elastic material is improved, and the seal 1 is prevented from being squeezed and causing bite failure. The setting of the retaining portion 4 improves the sealing stability of the seal 1.

[0060] The holding portion 4 is made of a hard material, which can be a metal material or a hard plastic. Specifically, the holding portion 4 can be made of a metal material such as stainless steel or aluminum, or can be made of a hard plastic such as hard polyvinyl chloride or polystyrene.

[0061] In order to facilitate the connection between the holding portion 4 and the plate body 2, as shown in FIG. Figure 3 and Figure 4 As shown, the holding part 4 includes a main body 401 and a fitting part 402. The main body 401 is formed with a receiving cavity 4011 adapted to and accommodating the sealing member 1; the fitting part 402 is extended outward from the main body 401 to be attached to and fixedly connected to the lower surface of the plate body 2. By providing the fitting part 402 extending outward from the main body 401, the stability of the holding part 4 after being attached to and fixedly connected to the lower surface of the plate body 2 is improved. When the holding part 4 is connected to the plate body 2 by bonding or hot melting, the increased connection area is conducive to enhancing the stability of the connection between the plate body 2 and the holding part 4.

[0062] The accommodating cavity 4011 is slightly smaller than the size of the seal 1 made of elastic material when not subject to external force, so that after the seal 1 is inserted into the accommodating cavity 4011, the extrusion of the cavity wall of the accommodating cavity 4011 causes a slight elastic deformation, and the seal 1 is tightened and inserted into the accommodating cavity 4011, so as to reduce the possibility of the cooling medium flowing into the accommodating cavity 4011 from the gap between the seal 1 and the retaining portion 4, thereby improving the sealing between the seal 1 and the retaining portion 4, and facilitating assembly without the need for filling with external substances.

[0063] In order to ensure the integrity of the plate body 2 when the bonding part 402 is connected to the plate body 2, the bonding part 402 is adhered to the lower surface of the plate body 2. The bonding method is used to fix the bonding part 402 to the plate body 2. Compared with hot melting or metal riveting, it is conducive to ensuring the integrity of the plate body 2, and gluing is convenient for automatic bonding. The adhesive used for bonding can be used to bond the bonding part 402 to the lower surface of the plate body 2. Specifically, epoxy resin glue, acrylic glue or polyurethane glue can be used; in this embodiment, epoxy resin hard glue is used, which has good hardness and is easy to solidify at room temperature, and has the characteristics of being waterproof and oil-proof.

[0064] When the flexible circuit board assembly structure of this embodiment is used, the sealing member 1 made of elastic material is integrally formed with the flexible circuit board 3, and the retaining portion 4 is pre-wrapped outside the flexible circuit board 3, so that the bite groove 1011 of the sealing member 1 is directly opposite to the bite teeth 201 of the board body 2, and after the bite teeth 201 are engaged and tightened in the bite groove 1011, the retaining portion 4 is sleeved outside the sealing member 1, so that the upper surface of the bonding portion 402 is bonded to the lower surface of the board body 2, and before the upper surface of the bonding portion 402 is bonded to the lower surface of the board body 2, the adhesive made of epoxy resin hard glue is coated on the upper surface of the bonding portion 402, and the retaining portion 4 is fixed to the lower surface of the board body 2, and the use of the flexible circuit board assembly structure is completed. By arranging the sealing member 1 that forms a seal between the flexible circuit board 3 and the board body 2 below the board body 2, the sealing performance of the flexible circuit board 3 passing through the board body 2 is improved, the possibility of leakage of the cooling medium from this place is reduced, and the stability and safety of the immersion battery pack when in use are improved.

[0065] Embodiment 2

[0066] This embodiment also relates to an immersion battery, including a housing and a battery module contained in the housing, wherein the flexible circuit board assembly structure as described above is configured in the housing. By assembling the flexible circuit board assembly structure as described above, the sealing of the connection between the flexible circuit board 3 and the circuit board is reduced, and the stability and safety of the immersion battery are improved.

[0067] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A flexible circuit board assembly structure, suitable for auxiliary installation of flexible circuit boards in submerged batteries, characterized in that: The assembly structure includes: The sealing member is matched with and held under a plate body to form a seal between the flexible circuit board and the plate body when the flexible circuit board passes through the plate body from under the plate body.

2. The flexible circuit board assembly structure according to claim 1, characterized in that: The sealing element comprises: A head engaged with the lower surface of the plate body; An extension portion is formed integrally with the head portion and extends downward from the head portion; The flexible circuit board is arranged to pass through the extension part and the head part in sequence from the bottom of the extension part.

3. The flexible circuit board assembly structure according to claim 2, characterized in that: A concave engaging groove is formed on the upper surface of the head facing the plate body, and engaging teeth embedded in the engaging groove are provided on the lower surface of the plate body.

4. The flexible circuit board assembly structure according to claim 2, characterized in that: The extension length of the extension portion is greater than the thickness of the head portion.

5. The flexible circuit board assembly structure according to claim 1, characterized in that: The sealing element is made of elastic material.

6. The flexible circuit board assembly structure according to claim 1, characterized in that: The board body is a circuit board held above the battery module.

7. The flexible circuit board assembly structure according to any one of claims 1 to 6, characterized in that: The outer sheath of the sealing element is provided with a retaining portion which is fixedly retained below the plate body.

8. The flexible circuit board assembly structure according to claim 7, characterized in that: The holding portion comprises: A main body, wherein a receiving cavity adapted to and accommodating the sealing member is formed in the main body; The fitting part is extended outward from the main body to fit against and be fixedly connected to the lower surface of the plate body.

9. The flexible circuit board assembly structure according to claim 8, characterized in that: The bonding portion is adhered to the lower surface of the plate body.

10. An immersion battery, comprising a housing, and a battery module contained in the housing, characterized in that: The flexible circuit board assembly structure according to any one of claims 1 to 9 is arranged in the housing.

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