Hall open-loop current sensor for new energy

Abstract

The utility model provides a Hall open-loop current sensor for new energy, which comprises an upper cover, a magnetic core and a Hall, and further comprises a lower shell insert, the lower shell insert is formed by integral injection molding, a male spigot is arranged on the lower end face of the upper cover, a circle of annular rib is arranged on the outer side face of the male spigot, a clamping block is arranged between the upper cover and the male spigot, the lower shell insert comprises a shell, and the shell is arranged in the shell. Pins are installed on the outer wall of the shell, a fixing piece is installed in the shell, a female spigot is formed in the upper end face of the fixing piece, a circle of annular groove is formed in the outer side face of the female spigot, the magnetic core is installed between the fixing piece and the inner wall of the shell, a notch is formed in the magnetic core, and the Hall is located in the notch and inserted into the lower shell insert. According to the current sensor, the tool cost can be effectively saved, the assembling mode and the appearance of a product are optimized, and the creepage distance of the current sensor is effectively increased.

Description

Technical Field

[0001] The utility model is a Hall open-loop current sensor for new energy, which is applied to industrial fields such as new energy vehicle BMS management system, uninterruptible power supply UPS, electric welding machine, etc. Background Art

[0002] The Hall current sensor can detect and isolate the primary current from the test circuit, and has the advantages of wide measurement range, high accuracy, good linearity, short response time, etc. When current passes through a wire, a magnetic field will be generated around the wire, and the magnitude of the magnetic field is proportional to the current passing through the wire. This magnetic field can be gathered by soft magnetic materials. The magnetic core of the Hall current sensor is a magnetic core with an air gap made of soft magnetic materials. Commonly used soft magnetic materials include silicon steel sheets, Permalloy, nanocrystalline magnetic cores, etc.

[0003] like Figure 1-2 As shown, the existing series of Hall open-loop current sensors have the following disadvantages in structural design:

[0004] 1. The existing Hall open-loop current sensor has many buckles, which are easy to break when assembled and requires multiple sliders in the mold, which is costly;

[0005] 2. The existing Hall open-loop current sensor has no stop, and the creepage distance does not meet the safety requirements;

[0006] 3. The existing Hall open-loop current sensor has no art seams, and the assembly misalignment of the upper and lower shells is clearly visible;

[0007] 4. The existing Hall open-loop current sensor pins are pressed in later. Due to the large diameter of the pins, not only does it require tooling to press them in, it is also easy to cause plastic cracking, which is time-consuming and labor-intensive. Utility Model Content

[0008] In order to solve the above technical problems, the utility model proposes a Hall open-loop current sensor for new energy, which effectively saves tooling costs, optimizes the product assembly method and product appearance, and effectively increases the creepage distance of the current sensor.

[0009] In order to achieve the above purpose, the technical solution adopted by the utility model is:

[0010] A Hall open-loop current sensor for new energy, comprising an upper cover, a magnetic core and a Hall, characterized in that it also comprises a lower shell insert, the lower shell insert is formed by integral injection molding, a male stop is arranged on the lower end surface of the upper cover, a circle of annular ribs are arranged on the outer side surface of the male stop, a clamping block is arranged between the upper cover and the male stop, the diameter of the clamping block is smaller than the diameter of the upper cover and larger than the diameter of the male stop, the lower shell insert comprises a shell, a pin is installed on the outer wall of the shell, a fixing piece is installed in the shell, a female stop is arranged on the upper end surface of the fixing piece, a circle of annular grooves are arranged on the outer side surface of the female stop, the magnetic core is installed between the fixing piece and the inner wall of the shell, a notch is arranged on the magnetic core, the Hall is located in the notch and inserted on the lower shell insert, when the upper cover is installed on the lower shell insert, the male stop sleeve is arranged on the female stop, at this time, the annular rib is located in the annular groove, the clamping block is located between the end surface of the upper cover and the end surface of the shell, forming an art seam.

[0011] In the above structure: the utility model proposes a Hall open-loop current sensor for new energy, including an upper cover, a magnetic core, a Hall and a lower shell insert, the magnetic core is installed between a fixing part and the inner wall of the shell, a notch is arranged on the magnetic core, and the Hall is located in the notch, wherein the lower shell insert is integrally injection molded, the lower shell insert includes a shell, a pin is installed on the outer wall of the shell, a fixing part is installed in the shell, the fixing part is used to cooperate with the upper cover to achieve a fixed connection, and the fixing part and the upper cover are connected and fixed by a stopper structure, specifically: a female stopper is arranged on the upper end surface of the fixing part, a circle of annular groove is arranged on the outer surface of the female stopper, a male stopper is arranged on the lower end surface of the upper cover, and a circle of annular ribs are arranged on the outer surface of the male stopper, when the upper cover is installed on the lower shell insert, the male stopper sleeve is arranged on the female stopper, at this time, the annular rib is located in the annular groove, the magnetic core is installed between the fixing part and the inner wall of the shell, a notch is arranged on the magnetic core, and the Hall is located in the notch and is inserted on the lower shell insert.

[0012] Since injection molded products have certain errors, even if a stop is made between the upper cover and the lower shell insert to prevent misalignment, the error still exists. Therefore, the present application makes a circle of art seams on the outside of the product where the upper cover and the lower shell insert fit together. In this way, even if the product is misaligned within the error range, the misalignment can be ignored due to the effect of the art seams, thereby improving the beauty of the product. The specific technical solution is as follows: a card block is also provided, and the card block is installed between the upper cover and the male stop. The diameter of the card block is smaller than the diameter of the upper cover and larger than the diameter of the male stop. When the upper cover is installed on the lower shell insert, the card block is located between the end face of the upper cover and the end face of the shell, forming an art seam.

[0013] Furthermore: there are four pins, and the four pins are integrally formed with the lower shell insert.

[0014] In the above structure: the four pins are uniformly formed by integrally inserting the lower shell insert through a mold, which effectively saves the later tooling cost and labor cost, and has better consistency.

[0015] Further: a slot is provided between the shell and the fixing part, the Hall comprises a fixing plate and a Hall pin, when the magnetic core is installed in the lower shell insert, the fixing plate is located in the notch, the Hall pin is inserted in the slot and protrudes from the bottom of the lower shell insert.

[0016] Furthermore: rubber points are respectively arranged on both end surfaces of the fixing plate and the end surface of the notch. When the fixing plate is located in the notch, the rubber points on the fixing plate and the notch are arranged alternately and pressed against each other.

[0017] In the above structure: the slot is used to realize the installation of the Hall. During installation, when the magnetic core is installed in the lower shell insert, the fixing plate is located in the notch, and the Hall pin is inserted in the slot and protrudes from the bottom of the lower shell insert. Since the magnetic core and Hall inside the product are not allowed to shake, the plastic needs to be tightly matched with the magnetic core and the Hall when designing. Rubber points are respectively provided on the two end faces of the fixing plate and the end face of the notch. When the fixing plate is located in the notch, the rubber points on the fixing plate and the notch are staggered and pressed against each other to fix them without shaking.

[0018] Furthermore: the lower shell insert is made of PA66+GF15 plastic material.

[0019] In the above structure: Since the present application is widely used in automotive products and management systems, it is necessary to select a temperature that meets the automotive grade requirements. According to the commonly used automotive grade 1 temperature standard, the temperature range is -40°C to 125°C. Therefore, the material of the lower shell insert of the present application is PA66+GF15 material.

[0020] PA66+GF15 material has good rigidity and strength;

[0021] PA66+GF15 material has good wear resistance and corrosion resistance and can be used in corrosive environments for a long time;

[0022] PA66+GF15 material has good high temperature resistance and low temperature resistance, and can maintain good stability in extreme environments;

[0023] PA66+GF15 material has better dimensional stability, because the product is small, so a more dimensionally stable material is required.

[0024] Compared with the prior art, the beneficial effects of the utility model are:

[0025] The present application designs the fixing method of the upper cover and the lower shell insert to be fixed with a stop structure, which can not only increase the creepage distance of the current sensor, but also effectively prevent the problem of misalignment of the upper cover and the lower shell insert during assembly.

[0026] The four pins in the present application are uniformly formed by integrally inserting the mold and the lower shell insert, which effectively saves the later tooling cost and labor cost, and the consistency will be better.

[0027] The present application sets a card block between the upper cover and the lower shell insert, so that a circle of artistic seam is formed at the matching place between the upper cover and the lower shell insert after the product is assembled. In this way, even if the product is misplaced within the error range, due to the effect of the artistic seam, the misplacement can be ignored, thereby improving the beauty of the product. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 It is an exploded diagram of a Hall open-loop current sensor in the prior art;

[0029] Figure 2 It is a schematic diagram of the structure of a Hall open-loop current sensor in the prior art;

[0030] Figure 3 is an exploded view of this application;

[0031] Figure 4 It is a schematic diagram of the overall structure of this application;

[0032] Figure 5 Schematic diagram of the upper cover structure;

[0033] Figure 6 It is a schematic diagram of the fixing structure;

[0034] Figure 7 It is a schematic diagram of the lower shell insert structure.

[0035] List of reference numerals:

[0036] 1. Upper cover; 2. Magnetic core; 21. Notch; 3. Hall; 31. Fixing plate; 32. Hall pin; 4. Lower shell; 5. Pin; 6. Lower shell insert; 61. Fixing piece; 62. Slot; 63. Shell; 7. Male stopper; 8. Annular rib; 9. Block; 10. Female stopper; 11. Annular groove; 12. Art seam. DETAILED DESCRIPTION

[0037] The present invention is further described in detail below in conjunction with the accompanying drawings and specific implementation methods:

[0038] like Figure 1-7As shown, the utility model proposes a Hall open-loop current sensor for new energy, including an upper cover 1, a magnetic core 2 and a Hall 3, and also includes a lower shell insert 6, the lower shell insert 6 is formed by integral injection molding, a male stop 7 is arranged on the lower end surface of the upper cover 1, a circle of annular ribs 8 is arranged on the outer surface of the male stop 7, a clamping block 9 is arranged between the upper cover 1 and the male stop 7, the diameter of the clamping block 9 is smaller than the diameter of the upper cover 1 and larger than the diameter of the male stop 7, the lower shell insert 6 includes a shell 63, a pin 5 is installed on the outer wall of the shell 63, and a The fixing part 61 has a female stop 10 on its upper end surface, and a circle of annular groove 11 is arranged on its outer surface. The magnetic core 2 is installed between the fixing part 61 and the inner wall of the shell 63. A notch 21 is arranged on the magnetic core 2. The Hall 3 is located in the notch 21 and is inserted on the lower shell insert 6. When the upper cover 1 is installed on the lower shell insert 6, the male stop 7 is sleeved on the female stop 10. At this time, the annular rib 8 is located in the annular groove 11, and the block 9 is located between the end face of the upper cover 1 and the end face of the shell 63, forming an art seam 12.

[0039] The utility model proposes a Hall open-loop current sensor for new energy, including an upper cover 1, a magnetic core 2, a Hall 3 and a lower shell insert 6, wherein the magnetic core 2 is installed between a fixing member 61 and an inner wall of a shell 63, a notch 21 is provided on the magnetic core 2, and the Hall 3 is located in the notch 21, wherein the lower shell insert 6 is integrally formed by injection molding, the lower shell insert 6 includes a shell 63, a pin 5 is installed on the outer wall of the shell 63, a fixing member 61 is installed in the shell 63, the fixing member 61 is used to cooperate with the upper cover 1 to achieve a fixed connection, and the fixing member 61 and the upper cover 1 are connected by a stopper. The structure is connected and fixed, specifically: a female stop 10 is arranged on the upper end surface of the fixing part 61, a circle of annular groove 11 is arranged on the outer side surface of the female stop 10, a male stop 7 is arranged on the lower end surface of the upper cover 1, a circle of annular rib 8 is arranged on the outer side surface of the male stop 7, when the upper cover 1 is installed on the lower shell insert 6, the male stop 7 is sleeved on the female stop 10, at this time, the annular rib 8 is located in the annular groove 11, the magnetic core 2 is installed between the fixing part 61 and the inner wall of the shell 63, a notch 21 is arranged on the magnetic core 2, and the Hall 3 is located in the notch 21 and is inserted on the lower shell insert 6.

[0040] Since injection molded products have certain errors, even if a stop is provided between the upper cover 1 and the lower shell insert 6 to prevent misalignment, the error still exists. Therefore, the present application makes a circle of art seam 12 on the outside of the product, where the upper cover 1 and the lower shell insert 6 cooperate. In this way, even if the product is misaligned within the error range, due to the effect of the art seam 12, the misalignment can be ignored, thereby improving the beauty of the product. The specific technical solution is as follows: a card block 9 is also provided, and the card block 9 is installed between the upper cover 1 and the male stop 7. The diameter of the card block 9 is smaller than the diameter of the upper cover 1 and larger than the diameter of the male stop 7. When the upper cover 1 is installed on the lower shell insert 6, the card block 9 is located between the end face of the upper cover 1 and the end face of the shell 63, forming an art seam 12.

[0041] In this embodiment, four pins 5 are provided, and the four pins 5 and the lower shell insert 6 are formed as an integral insert.

[0042] The four pins 5 are uniformly formed by integrally inserting the lower shell insert 6 through a mold, which effectively saves the later tooling cost and labor cost and has better consistency.

[0043] In this embodiment: a slot 62 is provided between the housing 63 and the fixing member 61, the Hall 3 includes a fixing sheet 31 and a Hall pin 5, when the magnetic core 2 is installed in the lower shell insert 6, the fixing sheet 31 is located in the notch 21, and the Hall pin 5 is inserted in the slot 62 and protrudes from the bottom of the lower shell insert 6. Rubber dots are respectively provided on both end faces of the fixing sheet 31 and the end face of the notch 21, when the fixing sheet 31 is located in the notch 21, the rubber dots on the fixing sheet 31 and the notch 21 are arranged alternately and pressed against each other.

[0044] The slot 62 is used to realize the installation of the Hall 3. During installation, when the magnetic core 2 is installed in the lower shell insert 6, the fixing plate 31 is located in the notch 21, and the Hall pin 5 is inserted in the slot 62 and protrudes from the bottom of the lower shell insert 6. Since the magnetic core 2 and the Hall 3 inside the product are not allowed to shake, the plastic design needs to be tightly matched with the magnetic core 2 and the Hall 3. Rubber points are respectively provided on the two end faces of the fixing plate 31 and the end face of the notch 21. When the fixing plate 31 is located in the notch 21, the rubber points on the fixing plate 31 and the notch 21 are staggered and pressed against each other to fix them without shaking.

[0045] In this embodiment: the lower shell insert 6 is made of a plastic material of PA66+GF15.

[0046] Since the present application is widely used in automotive products and management systems, it is necessary to select a material that meets the automotive grade temperature requirements. According to the commonly used automotive grade 1 temperature standard, the temperature range is -40°C to 125°C. Therefore, the material of the lower shell insert 6 of the present application is PA66+GF15 material.

[0047] PA66+GF15 material has good rigidity and strength;

[0048] PA66+GF15 material has good wear resistance and corrosion resistance and can be used in corrosive environments for a long time;

[0049] PA66+GF15 material has good high temperature resistance and low temperature resistance, and can maintain good stability in extreme environments;

[0050] PA66+GF15 material has better dimensional stability, because the product is small, so a more dimensionally stable material is required.

[0051] Based on the above technical solution:

[0052] The present application designs the fixing method of the upper cover 1 and the lower shell insert 6 to be a stopper structure, which can not only increase the creepage distance of the current sensor, but also effectively prevent the problem of misalignment of the upper cover 1 and the lower shell insert 6 during assembly.

[0053] The four pins 5 in the present application are uniformly formed by integrally inserting the lower shell insert 6 through a mold, which effectively saves the later tooling cost and labor cost, and has better consistency.

[0054] The present application sets a clamping block 9 between the upper cover 1 and the lower shell insert 6, so that a circle of art seam 12 is formed between the upper cover 1 and the lower shell insert 6 after the product is assembled. In this way, even if the product is misaligned within the error range, the misalignment can be ignored due to the effect of the art seam 12, thereby improving the beauty of the product.

[0055] The above is only a preferred embodiment of the present invention and does not constitute any other limitation on the present invention. Any modification or equivalent change made based on the technical essence of the present invention still falls within the scope of protection required by the present invention.

Claims

1. A Hall open-loop current sensor for new energy, comprising an upper cover (1), a magnetic core (2) and a Hall (3), characterized in that: The invention also comprises a lower shell insert (6), wherein the lower shell insert (6) is formed by integral injection molding, a male stopper (7) is arranged on the lower end surface of the upper cover (1), a circle of annular ribs (8) is arranged on the outer side surface of the male stopper (7), a clamping block (9) is arranged between the upper cover (1) and the male stopper (7), the diameter of the clamping block (9) is smaller than the diameter of the upper cover (1) and larger than the diameter of the male stopper (7), the lower shell insert (6) comprises a shell (63), a pin (5) is installed on the outer wall of the shell (63), a fixing member (61) is installed in the shell (63), and a female stopper is arranged on the upper end surface of the fixing member (61). (10), a circle of annular grooves (11) are arranged on the outer surface of the female stop (10), the magnetic core (2) is installed between the fixing member (61) and the inner wall of the shell (63), a notch (21) is arranged on the magnetic core (2), the Hall (3) is located in the notch (21) and is inserted on the lower shell insert (6), when the upper cover (1) is installed on the lower shell insert (6), the male stop (7) is sleeved on the female stop (10), at this time, the annular rib (8) is located in the annular groove (11), the block (9) is located between the end face of the upper cover (1) and the end face of the shell (63), forming an art seam (12).

2. A Hall open-loop current sensor for new energy according to claim 1, characterized in that: Four pins (5) are provided, and the four pins (5) and the lower shell insert (6) are integrally formed.

3. A Hall open-loop current sensor for new energy according to claim 1, characterized in that: A slot (62) is provided between the shell (63) and the fixing member (61); the Hall (3) comprises a fixing plate (31) and a Hall pin (5); when the magnetic core (2) is installed in the lower shell insert (6), the fixing plate (31) is located in the notch (21); and the Hall pin (5) is inserted in the slot (62) and protrudes from the bottom of the lower shell insert (6).

4. A Hall open-loop current sensor for new energy according to claim 3, characterized in that: The two end surfaces of the fixing plate (31) and the end surface of the notch (21) are respectively provided with rubber dots. When the fixing plate (31) is located in the notch (21), the rubber dots on the fixing plate (31) and the notch (21) are arranged alternately and pressed against each other.

5. The Hall open-loop current sensor for new energy according to claim 1, characterized in that: The lower shell insert (6) is made of PA66+GF15 plastic material.

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