A pre-charge resistor fixing structure, a battery pack and an electric vehicle

Abstract

The utility model provides a kind of pre-charging resistor fixing structure, battery pack and electric car belong to battery pack accessory technical field, including control box bottom shell, the control box bottom shell includes shell bottom plate, at least one set of elastic baffle is provided on the shell bottom plate, each set of elastic baffle includes two symmetrically mounted elastic baffles, two symmetrically mounted elastic baffles are used for installing pre-charging resistor between;The end of the elastic baffle away from shell bottom plate is provided with first hook, and first hook is located in the inside of elastic baffle.The utility model fixes pre-charging resistor by elastic baffle, without reconnection fixing seat to further reduce the problem that pre-charging resistor fixing structure occupies larger space.

Description

Technical Field

[0001] This utility model belongs to the field of battery pack accessories technology, and specifically relates to a pre-charge resistor fixing structure, a battery pack, and an electric vehicle. Background Technology

[0002] As a core component of the battery pack for new energy vehicles, the high-voltage control box is mainly responsible for the conduction, disconnection, and short-circuit protection of the vehicle's high voltage. The high-voltage control box is mainly charged through a pre-charging resistor, which can prevent excessive charging current from damaging electrical components and ensure the normal operation of the equipment.

[0003] Existing pre-charge resistors are mostly fixed inside the high-voltage control box using metal brackets. However, metal brackets occupy a large space, are expensive, and are not convenient to install.

[0004] Therefore, a pre-charge resistor fixing structure with small space occupation and low cost is needed. Utility Model Content

[0005] To address the aforementioned problems, this utility model proposes a pre-charge resistor fixing structure, including a control box bottom shell. The control box bottom shell includes a housing bottom plate, and at least one set of elastic baffles are provided on the housing bottom plate. Each set of elastic baffles includes two symmetrically installed elastic baffles, and a pre-charge resistor is installed between the two symmetrically installed elastic baffles. A first hook is provided at the end of the elastic baffle away from the housing bottom plate, and the first hook is located on the inner side of the elastic baffle.

[0006] Furthermore, the elastic baffles are inclined, with each set of elastic baffles inclined towards each other.

[0007] Furthermore, two sets of elastic baffles are provided. The line connecting the first set of elastic baffles is a, and the line connecting the second set of elastic baffles is b. The angle between line segment a and line segment b is c.

[0008] Furthermore, a reinforcing rib is provided at the connection between the elastic baffle and the bottom plate of the housing. The reinforcing rib is triangular and located on the outer surface of each set of elastic baffles.

[0009] Furthermore, the first hook, elastic baffle, shell bottom plate, and reinforcing rib are integrally formed.

[0010] Furthermore, a through groove is provided on the bottom plate of the housing, the through groove being located between opposing elastic baffles; an elastic pressure strip is provided in the through groove, one end of the elastic pressure strip being fixedly connected to the bottom plate of the housing.

[0011] Furthermore, a second hook is provided on the upper surface of the end of the elastic pressure strip near the elastic baffle.

[0012] Furthermore, the housing base plate, the second hook, and the elastic pressure strip are integrally formed.

[0013] A battery pack includes a pre-charge resistor, a battery cell, a housing, and a pre-charge resistor fixing structure. The battery cell, the pre-charge resistor fixing structure, the pre-charge resistor, and the battery cell are all installed in the housing. The pre-charge resistor is installed between the elastic baffles of the pre-charge resistor fixing structure. The pre-charge resistor is electrically connected to the battery cell via a connector.

[0014] An electric vehicle includes the aforementioned battery pack and vehicle body, wherein the battery pack is mounted on the vehicle body.

[0015] The beneficial effects of this utility model are:

[0016] 1. The pre-charge resistor fixing structure of this utility model has at least one set of elastic baffles on the bottom plate of the housing. Each set of elastic baffles includes two symmetrically installed elastic baffles, and a pre-charge resistor is installed between the elastic baffles. A first hook is provided at the end of the elastic baffle away from the bottom plate of the housing. The pre-charge resistor is fixed by the elastic baffles, which eliminates the need to reconnect the fixing base and reduces the problem of the large space occupied by the pre-charge resistor fixing structure.

[0017] 2. The first hook, elastic baffle, shell bottom plate and reinforcing rib of the pre-charge resistance fixing structure of this utility model are integrally molded by plastic injection molding. Due to the plastic injection molding, it has the advantages of low price and convenient manufacturing.

[0018] Other features and advantages of this invention will be set forth in the description which follows, and will be apparent in part from the description, or may be learned by practicing the invention. The objectives and other advantages of this invention can be realized and obtained through the structures pointed out in the description and the accompanying drawings. Attached Figure Description

[0019] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0020] Figure 1 A schematic diagram of the pre-charge resistor mounting structure in an embodiment of this utility model is shown.

[0021] Figure 2 An exploded view of the pre-charge resistor fixing structure and the pre-charge resistor in an embodiment of this utility model is shown.

[0022] Figure 3A schematic diagram of the pre-charge resistor fixing structure in an embodiment of this utility model is shown.

[0023] Figure 4 A partial cross-sectional schematic diagram of the pre-charge resistor fixing structure in an embodiment of this utility model is shown.

[0024] In the diagram, 1 is the bottom shell of the control box; 2 is the pre-charge resistor; 101 is the first hook; 102 is the elastic baffle; 103 is the bottom plate of the housing; 104 is the second hook; 105 is the elastic pressure strip; 106 is the connecting plate; 107 is the through groove; 108 is the reinforcing rib; and 201 is the connector. Detailed Implementation

[0025] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0026] refer to Figure 1 A pre-charge resistor fixing structure includes a control box bottom shell 1, the control box bottom shell 1 including a housing bottom plate 103, the housing bottom plate 103 being provided with at least one set of elastic baffles 102, each set of elastic baffles 102 including two symmetrically installed elastic baffles 102, the space between the two symmetrically installed elastic baffles 102 being used to install a pre-charge resistor 2; a first hook 101 is provided at the end of the elastic baffle 102 away from the housing bottom plate 103; the first hook 101 is located on the inner side of the elastic baffle 102.

[0027] This utility model provides at least one set of elastic baffles 102 on the bottom plate 103 of the housing. Each set of elastic baffles 102 includes two symmetrically installed elastic baffles 102, and the pre-charge resistor 2 is installed between the elastic baffles 102. A first hook 101 is provided at the end of the elastic baffle 102 away from the bottom plate 103 of the housing. The pre-charge resistor 2 is fixed by the elastic baffles 102, thereby reducing the problem of the large space occupied by the pre-charge resistor fixing structure.

[0028] refer to Figure 2 The elastic baffles 102 are inclined, and each set of elastic baffles 102 is inclined towards each other. Specifically, the elastic baffles 102 are inclined towards the pre-charge resistor 2, which can further limit the pre-charge resistor 2 and prevent the pre-charge resistor 2 from shaking due to the gap between the pre-charge resistor 2 and the bottom shell 1 of the control box, thereby damaging the pre-charge resistor 2.

[0029] Furthermore, two sets of elastic baffles 102 are provided. The line connecting the first set of elastic baffles 102 is a, and the line connecting the second set of elastic baffles 102 is b. The included angle between line segments a and b is c. Specifically, the included angle c is 80°-100°, preferably 90°, that is, the two sets of elastic baffles 102 are perpendicular to each other, used to fix the pre-charge resistor 2 around its perimeter.

[0030] refer to Figure 4 A reinforcing rib 108 is provided at the connection between the elastic baffle 102 and the housing bottom plate 103. The reinforcing rib 108 is triangular and located on the outer surface of each set of elastic baffles 102. Specifically, a reinforcing rib 108 is provided at the middle position of the outer root of the elastic baffle 102. The reinforcing rib 108 is triangular in shape and helps to enhance the strength of the elastic baffle 102.

[0031] In this embodiment of the invention, the first hook 101, the elastic baffle 102, the housing base plate 103, and the reinforcing rib 108 are integrally formed. Specifically, the first hook 101, the elastic baffle 102, the housing base plate 103, and the reinforcing rib 108 are integrally formed by plastic injection molding, which has the advantages of low price and convenient manufacturing.

[0032] refer to Figure 3 A through groove 107 is provided on the bottom plate 103 of the housing, and the through groove 107 is located between the opposite elastic baffles 102; an elastic pressure strip 105 is provided in the through groove 107, and one end of the elastic pressure strip 105 is fixedly connected to the bottom plate 103 of the housing.

[0033] In the above embodiments, another optional implementation is that a second hook 104 is provided on the upper surface of the end of the elastic pressure strip 105 near the elastic baffle 102.

[0034] Specifically, the control box bottom shell 1 includes a bottom shell 103, an elastic pressure strip 105, and a connecting plate 106. The bottom shell 103 has a through groove 107, and the elastic pressure strip 105 is located in the middle of the through groove 107. The front and rear sides of the elastic pressure strip 105 are fixedly connected to the bottom shell 103 through a connecting plate 106. A second hook 104 is provided above the elastic pressure strip 105. The elastic pressure strip 105 will engage the pre-charge resistor 2 upward through the second hook 104, so that the top surface of the pre-charge resistor 2 is in contact with the first hook 101, further improving the structural stability and preventing the pre-charge resistor from being damaged by vibration. The connecting plate 106 is located between the opposing elastic baffles 102, and the connecting plate 106 is integrally formed with the bottom shell 103.

[0035] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

[0036] Furthermore, the housing base plate 103, the second hook 104, and the elastic pressure strip 105 are integrally formed. Specifically, the housing base plate 103, the second hook 104, and the elastic pressure strip 105 are integrally formed by plastic injection molding, which has the advantage of convenient manufacturing.

[0037] In the above embodiments, an optional second implementation is as follows: Specifically, the first hook 101, the elastic baffle 102, the housing bottom plate 103, the second hook 104, the elastic pressure strip 105, and the connecting plate 106 are integrally molded from plastic by injection molding, which has the advantage of convenient manufacturing. A set of elastic baffles 102 is provided on the housing bottom plate 103. The set of elastic baffles 102 includes two elastic baffles 102, which are symmetrically installed and located at both ends of the pre-charge resistor 2. Reinforcing ribs 108 are provided on the back of the two elastic baffles 102. The reinforcing ribs 108 are triangular in shape and help to enhance the elastic strength of the elastic baffles 102. The reinforcing rib 108 can be a thin triangular plate or a triangular prism with the same width as the elastic baffle 102, thereby enhancing the strength of the elastic baffle 102 and providing greater elasticity to lock the pre-charge resistor 2 in place. A through groove 107 is provided on the bottom plate 103 of the housing. The connector 201 of the pre-charge resistor 2 passes through the through groove 107 and connects to the circuit, or the connector 201 of the pre-charge resistor 2 is connected to the circuit on the bottom plate 103 of the housing. An elastic pressure strip 105 is provided in the through groove 107. A second hook 104 is provided on the elastic pressure strip 105. The elastic pressure strip 105 will engage the pre-charge resistor 2 upward through the second hook 104 (i.e., push the pre-charge resistor 2 upward), so that the top surface of the pre-charge resistor 2 is in contact with the first hook 101, further improving the structural stability and preventing the pre-charge resistor from being damaged by vibration.

[0038] In the above embodiments, an optional third implementation is that the first hook 101, the elastic baffle 102, the housing bottom plate 103, the second hook 104, and the elastic pressure strip 105 are integrally molded from plastic by injection molding, which has the advantage of convenient manufacturing. Two sets of elastic baffles 102 are provided on the housing bottom plate 103. The first set of elastic baffles 102 includes two elastic baffles 102, which are symmetrically installed and located at both ends of the pre-charge resistor 2. The second set of elastic baffles 102 also includes two elastic baffles 102, which are symmetrically installed and located on both sides of the pre-charge resistor 2. That is, the two sets of four elastic baffles 102 fix the pre-charge resistor 2 around its perimeter, improving its sturdiness. Reinforcing ribs 108 are provided on the back of the two elastic baffles 102. The reinforcing ribs 108 are triangular in shape and help to enhance the strength of the elastic baffles 102. The reinforcing rib 108 can be a thin triangular plate or a triangular prism with the same width as the elastic baffle 102, thereby enhancing the strength of the elastic baffle 102 and providing greater elasticity to lock the pre-charge resistor 2 in place. A through groove 107 is provided on the bottom plate 103 of the housing. The connector 201 of the pre-charge resistor 2 passes through the through groove 107 and connects to the circuit, or the connector 201 of the pre-charge resistor 2 is connected to the circuit on the bottom plate 103 of the housing. An elastic pressure strip 105 is provided in the through groove 107. A second hook 104 is provided on the elastic pressure strip 105. The elastic pressure strip 105 will engage the pre-charge resistor 2 upward through the second hook 104 (i.e., push the pre-charge resistor 2 upward), so that the top surface of the pre-charge resistor 2 is in contact with the first hook 101, further improving the structural stability and preventing the pre-charge resistor from being damaged by vibration.

[0039] A battery pack includes the aforementioned pre-charge resistor fixing structure, pre-charge resistor 2, battery cells, and a housing. The pre-charge resistor fixing structure includes a control box bottom shell 1. The battery cells, control box bottom shell 1, pre-charge resistor 2, and battery cells are all installed in the housing. The pre-charge resistor 2 is installed between elastic baffles 102 of the control box bottom shell 1. The pre-charge resistor 2 is electrically connected to the battery cells via a connector 201.

[0040] Specifically, the pre-charge resistor 2 is inserted between a set of control box bottom shells 1. A first hook 101 and an elastic baffle 102 are provided on the front, rear, left, and right sides of the control box bottom shell 1, arranged symmetrically in front-back and left-right configurations. A second hook 104, an elastic pressure strip 105, and a through groove 107 are provided on the front and rear sides of the control box bottom shell 1, also arranged symmetrically. Since the first hook 101, elastic baffle 102, bottom plate 103, second hook 104, elastic pressure strip 105, connecting plate 106, and through groove 107 of the control box bottom shell 1 are made of plastic injection molded in one piece, the pre-charge resistor 2 can be installed and fixed after being inserted into the elastic baffle 102. This eliminates the need for metal brackets and screws for fixing the pre-charge resistor 2, offering advantages such as convenient installation, compact size, and low application cost.

[0041] An electric vehicle is characterized by comprising the aforementioned battery pack and vehicle body, wherein the battery pack is mounted on the vehicle body.

[0042] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A pre-charge resistor fixing structure, characterized in that, The control box includes a bottom shell (1), which includes a bottom plate (103). At least one set of elastic baffles (102) is provided on the bottom plate (103). Each set of elastic baffles (102) includes two symmetrically installed elastic baffles (102). A pre-charge resistor (2) is installed between the two symmetrically installed elastic baffles (102). A first hook (101) is provided at the end of the elastic baffle (102) away from the bottom plate (103), and the first hook (101) is located inside the elastic baffle (102).

2. The pre-charge resistor fixing structure according to claim 1, characterized in that, The elastic baffle (102) is inclined, and each set of elastic baffles (102) is inclined towards each other.

3. A pre-charge resistor fixing structure according to claim 1 or 2, characterized in that, Two sets of elastic baffles (102) are provided. The line connecting the first set of elastic baffles (102) is a, and the line connecting the second set of elastic baffles (102) is b. The angle between line segment a and line segment b is c.

4. A pre-charge resistor fixing structure according to claim 1 or 2, characterized in that, A reinforcing rib (108) is provided at the connection between the elastic baffle (102) and the bottom plate (103) of the shell. The reinforcing rib (108) is triangular and located on the outer surface of each set of elastic baffles (102).

5. The pre-charge resistor fixing structure according to claim 4, characterized in that, The first hook (101), the elastic baffle (102), the shell bottom plate (103) and the reinforcing rib (108) are integrally formed.

6. The pre-charge resistor fixing structure according to claim 1, characterized in that, A through groove (107) is provided on the bottom plate (103) of the housing, and the through groove (107) is located between opposite elastic baffles (102); an elastic pressure strip (105) is provided in the through groove (107), and one end of the elastic pressure strip (105) is fixedly connected to the bottom plate (103) of the housing.

7. The pre-charge resistor fixing structure according to claim 6, characterized in that, The upper surface of the elastic strip (105) near the elastic baffle (102) is provided with a second hook (104).

8. The pre-charge resistor fixing structure according to claim 7, characterized in that, The shell base plate (103), the second hook (104) and the elastic pressure strip (105) are integrally formed.

9. A battery pack, characterized in that, The device includes a pre-charge resistor (2), a battery cell, a housing, and a pre-charge resistor fixing structure as described in any one of claims 1-8. The battery cell, the pre-charge resistor fixing structure, the pre-charge resistor (2), and the battery cell are all installed in the housing. The pre-charge resistor (2) is installed between the elastic baffles (102) of the pre-charge resistor fixing structure. The pre-charge resistor (2) is electrically connected to the battery cell through a connector (201).

10. A tram, characterized in that, It includes the battery pack and vehicle body as described in claim 9, wherein the battery pack is mounted on the vehicle body.

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